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Massive renaming. Delegate/Delegation becomes Referrer, Referent and things *do* make a little more sense.

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git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/modules/recordsmanagement/BRANCHES/classified_renditions@111633 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
Neil McErlean
2015-09-08 14:29:30 +00:00
parent 9e4ccdd053
commit 7ec55f4830
20 changed files with 1064 additions and 1016 deletions
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92
rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/metadatadelegation/DelegationAdminService.java
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@@ -1,92 +0,0 @@
/*
* Copyright (C) 2005-2015 Alfresco Software Limited.
*
* This file is part of Alfresco
*
* Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alfresco is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
package org.alfresco.module.org_alfresco_module_rm.metadatadelegation;
import static org.alfresco.module.org_alfresco_module_rm.metadatadelegation.DelegationException.ChainedDelegationUnsupported;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.namespace.QName;
import java.util.Set;
/**
* A service to manage the delegation of aspect metadata.
* Using this service a node can be {@link #attachDelegate linked} to a delegate node for a configured set of aspects.
* (Note that this delegate node must already exist within the database.)
* Then any read request for relevant metadata such as hasAspect or getProperties can be delegated to the
* linked node.
* <p/>
* For a link to be made, there must be a {@link #getDefinedDelegations() defined Delegation} already in the system.
* This means that a peer-association type will have to have been declared and that a spring bean will have to have
* defined which aspects are to be handled by this {@code Delegation}.
*
* @author Neil Mc Erlean
* @since 3.0.a
*/
public interface DelegationAdminService
{
/**
* Creates a link between two nodes such that the first {@code nodeRef} can 'inherit' or reuse some aspect
* metadata from another node - the {@code delegateNodeRef}.
* <p/>
* Note that links can currently only extend between two pairs of nodes and cannot be chained.
*
* @param nodeRef the node which is to inherit additional metadata.
* @param delegateNodeRef the node which will provide the additional metadata.
* @param assocType the type of the peer association which will link the two nodes.
* @return a {@link Delegation} object which defines the link type.
* @throws ChainedDelegationUnsupported if an attempt is made to attach nodes such that a chain would be made.
*/
Delegation attachDelegate(NodeRef nodeRef, NodeRef delegateNodeRef, QName assocType);
/**
* Removes an existing metadata delegation link between two nodes.
*
* @param nodeRef the node which has been linked to a delegate.
* @param assocType the type of the peer assocation forming the link.
* @return the removed {@link Delegation}.
*/
Delegation detachDelegate(NodeRef nodeRef, QName assocType);
/**
* Gets the set of defined {@link Delegation}s.
*
* @return the set of defined Delegations.
*/
Set<Delegation> getDefinedDelegations();
/**
* Gets the {@link Delegation} which contains the specified {@code aspectName} if there is one.
* Note that only one {@link Delegation} may declare that it handles any particular aspect.
*
* @param aspectName the name of the aspect whose {@link Delegation} is sought.
* @return the {@link Delegation} which handles the specified aspect, if there is one.
*/
Delegation getDelegationFor(QName aspectName);
/**
* Gets the set of {@link Delegation}s which are in effect from the specified {@code nodeRef}.
* From these, you can retrieve the types of peer associations which are linked to the specified
* {@code nodeRef} as well as the aspect types that are handled.
*
* @param nodeRef the NodeRef whose delegations are sought.
* @return the set of {@link Delegation}s from the specified nodeRef.
*/
Set<Delegation> getDelegationsFrom(NodeRef nodeRef);
}

167
rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/metadatadelegation/DelegationAdminServiceImpl.java
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@@ -1,167 +0,0 @@
/*
* Copyright (C) 2005-2015 Alfresco Software Limited.
*
* This file is part of Alfresco
*
* Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alfresco is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
package org.alfresco.module.org_alfresco_module_rm.metadatadelegation;
import static org.alfresco.util.collections.CollectionUtils.transform;
import org.alfresco.module.org_alfresco_module_rm.metadatadelegation.DelegationException.ChainedDelegationUnsupported;
import org.alfresco.service.cmr.repository.AssociationRef;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.cmr.repository.NodeService;
import org.alfresco.service.namespace.QName;
import org.alfresco.util.collections.Function;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* @author Neil Mc Erlean
* @since 3.0.a
*/
public class DelegationAdminServiceImpl implements DelegationAdminService
{
private DelegationRegistry registry;
private NodeService nodeService;
public void setNodeService(NodeService service)
{
this.nodeService = service;
}
public void setDelegationRegistry(DelegationRegistry registry)
{
this.registry = registry;
}
@Override public Delegation attachDelegate(NodeRef nodeRef, NodeRef delegateNodeRef, QName assocType)
{
final Delegation delegation = getDelegationForAssociation(assocType);
// Prevent the creation of chains of delegation from node A to B to C.
// If any nodes are already delegating to nodeRef for the specified assoc, then we can't chain.
final List<AssociationRef> existingDelegatorAssocs = nodeService.getSourceAssocs(nodeRef, assocType);
if ( !existingDelegatorAssocs.isEmpty())
{
final List<NodeRef> existingDelegators = transform(existingDelegatorAssocs,
new Function<AssociationRef, NodeRef>()
{
@Override public NodeRef apply(AssociationRef assocRef)
{
return assocRef.getSourceRef();
}
});
throw new ChainedDelegationUnsupported("Cannot attach delegate", existingDelegators);
}
// Likewise if this delegate node is already itself delegating elsewhere, we cannot chain.
final List<AssociationRef> existingDelegateAssocs = nodeService.getTargetAssocs(delegateNodeRef, assocType);
if ( !existingDelegateAssocs.isEmpty())
{
// If it's not empty, it should only have one value in it, but just in case...
final List<NodeRef> existingDelegates = transform(existingDelegateAssocs,
new Function<AssociationRef, NodeRef>()
{
@Override public NodeRef apply(AssociationRef assocRef)
{
return assocRef.getTargetRef();
}
});
throw new ChainedDelegationUnsupported("Cannot attach delegate", existingDelegates);
}
// OK. We're good to go. We're not making a chain here.
nodeService.createAssociation(nodeRef, delegateNodeRef, assocType);
return delegation;
}
private Delegation getDelegationForAssociation(QName assocType)
{
final Delegation delegation = registry.getDelegateForAssociation(assocType);
if (delegation == null)
{
throw new IllegalArgumentException("No " + Delegation.class.getSimpleName() +
" configured for assocType " + assocType);
}
return delegation;
}
@Override public Delegation detachDelegate(NodeRef nodeRef, QName assocType)
{
// Is the association there?
final List<AssociationRef> assocs = nodeService.getTargetAssocs(nodeRef, assocType);
if (assocs == null || assocs.isEmpty())
{
return null;
}
else
{
Delegation result = getDelegationForAssociation(assocType);
// There should only be one such association... but we'll remove them all just in case
for (AssociationRef assocRef : assocs)
{
nodeService.removeAssociation(nodeRef, assocRef.getTargetRef(), assocType);
}
return result;
}
}
@Override public Delegation getDelegationFor(QName aspectName)
{
Delegation delegation = null;
for (Delegation d : getDefinedDelegations())
{
if (d.getAspects().contains(aspectName))
{
delegation = d;
break;
}
}
return delegation;
}
@Override public Set<Delegation> getDelegationsFrom(NodeRef nodeRef)
{
final Set<Delegation> allDelegations = getDefinedDelegations();
final Set<Delegation> result = new HashSet<>();
for (Delegation d : allDelegations)
{
final QName assocType = d.getAssocType();
if ( !nodeService.getTargetAssocs(nodeRef, assocType).isEmpty())
{
result.add(d);
}
}
return result;
}
@Override public Set<Delegation> getDefinedDelegations()
{
return registry.getDelegations();
}
}

107
rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/metadatadelegation/DelegationException.java
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@@ -1,107 +0,0 @@
/*
* Copyright (C) 2005-2015 Alfresco Software Limited.
*
* This file is part of Alfresco
*
* Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alfresco is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
package org.alfresco.module.org_alfresco_module_rm.metadatadelegation;
import org.alfresco.error.AlfrescoRuntimeException;
import org.alfresco.service.cmr.repository.NodeRef;
import java.util.List;
/**
* Generic class for any runtime exceptions related to metadata delegates.
*
* @author Neil Mc Erlean
* @since 3.0.a
*/
public class DelegationException extends AlfrescoRuntimeException
{
public DelegationException(String msgId) { super(msgId); }
public DelegationException(String msgId, Throwable cause) { super(msgId, cause); }
public static class InvalidDelegation extends DelegationException
{
public InvalidDelegation(String msgId)
{
super(msgId);
}
}
/** A Metadata Delegation already exists. */
public static class DelegationAlreadyExists extends DelegationException
{
private final Delegation delegation;
public DelegationAlreadyExists(String msgId, Delegation delegation)
{
super(msgId);
this.delegation = delegation;
}
}
/**
* A {@link Delegation} has not been found.
* Remember that a Delegation is the definition of a type of link.
*/
public static class DelegationNotFound extends DelegationException
{
public DelegationNotFound(String msgId)
{
super(msgId);
}
}
/**
* A Delegate has not been found.
* Remember that a Delegate is an instance of a link between two nodes.
*/
public static class DelegateNotFound extends DelegationException
{
public DelegateNotFound(String msgId)
{
super(msgId);
}
}
/**
* Exception to report that we currently do not support chained delegation.
*/
public static class ChainedDelegationUnsupported extends DelegationException
{
private final List<NodeRef> nodesAlreadyDelegating;
public ChainedDelegationUnsupported(String msgId, List<NodeRef> nodesAlreadyDelegating)
{
super(msgId);
this.nodesAlreadyDelegating = nodesAlreadyDelegating;
}
public List<NodeRef> getNodesAlreadyDelegating()
{
return this.nodesAlreadyDelegating;
}
@Override public String toString()
{
StringBuilder msg = new StringBuilder();
msg.append(this.getClass().getSimpleName()).append(" Already delegating from: ")
.append(nodesAlreadyDelegating.toString());
return msg.toString();
}
}
}

85
rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/metadatadelegation/DelegationRegistry.java
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@@ -1,85 +0,0 @@
/*
* Copyright (C) 2005-2015 Alfresco Software Limited.
*
* This file is part of Alfresco
*
* Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alfresco is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
package org.alfresco.module.org_alfresco_module_rm.metadatadelegation;
import org.alfresco.module.org_alfresco_module_rm.metadatadelegation.DelegationException.DelegationAlreadyExists;
import org.alfresco.module.org_alfresco_module_rm.metadatadelegation.DelegationException.InvalidDelegation;
import org.alfresco.service.namespace.QName;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/**
* This is a registry of {@link Delegation delegations} which have been defined in the system.
*
* @author Neil Mc Erlean
* @since 3.0.a
*/
public class DelegationRegistry
{
private final Set<Delegation> delegations = new HashSet<>();
public void register(Delegation delegation)
{
// Various validation steps to do here to ensure we get consistent, sensible Delegations registered.
if (delegations.contains(delegation))
{
throw new DelegationAlreadyExists("Cannot register duplicate delegation", delegation);
}
for (Delegation existingDelegation : delegations)
{
if (existingDelegation.getAssocType().equals(delegation.getAssocType()))
{
throw new InvalidDelegation("Cannot register two delegations with the same assocType. " +
"Existing: " + existingDelegation +
" New: " + delegation);
}
// Yes this is a for loop inside a for loop but we're assuming these sets will not be large.
for (QName existingAspect : existingDelegation.getAspects())
{
if (delegation.getAspects().contains(existingAspect))
{
throw new InvalidDelegation("Cannot register two delegations with the same aspect. " +
"Existing: " + existingDelegation +
" New: " + delegation);
}
}
}
this.delegations.add(delegation);
}
public Set<Delegation> getDelegations()
{
return Collections.unmodifiableSet(delegations);
}
public Delegation getDelegateForAssociation(QName assocType)
{
for (Delegation d : delegations)
{
if (d.getAssocType().equals(assocType))
{
return d;
}
}
return null;
}
}

96
rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/metadatadelegation/DelegationService.java
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@@ -1,96 +0,0 @@
/*
* Copyright (C) 2005-2015 Alfresco Software Limited.
*
* This file is part of Alfresco
*
* Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alfresco is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
package org.alfresco.module.org_alfresco_module_rm.metadatadelegation;
import static org.alfresco.module.org_alfresco_module_rm.metadatadelegation.DelegationException.DelegationNotFound;
import org.alfresco.service.cmr.repository.InvalidNodeRefException;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.namespace.QName;
import java.io.Serializable;
import java.util.Map;
/**
* This service provides read-only access to delegated metadata.
* TODO complete.
*
* @author Neil Mc Erlean
* @since 3.0.a
*/
public interface DelegationService
{
/**
* Checks if the specified nodeRef has an attached {@link Delegation} for the specified aspect.
*
* @param nodeRef the nodeRef which may or may not have a delegate node for the specified aspect.
* @param aspectName the name of the aspect for which the node may or may not have delegation.
* @return whether the node is delegating metadata reads for the specified aspect.
* @throws InvalidNodeRefException if the supplied nodeRef does not exist.
* @throws DelegationNotFound if no delegation for the specified aspect has been attached.
*/
boolean hasDelegateForAspect(NodeRef nodeRef, QName aspectName);
/**
* Gets the delegate node for the specified aspect, if there is one.
*
* @param nodeRef the node with the delegate.
* @param aspectName the aspect name.
* @return the nodeRef of the delegate if there is one, else {@code null}.
* @throws DelegationNotFound if no delegation for the specified aspect has been attached.
*/
NodeRef getDelegateFor(NodeRef nodeRef, QName aspectName);
/**
* Gets all the property values from the delegate node for the specified aspect.
*
* @param nodeRef the node with the delegate.
* @param aspectName the aspect name which holds the properties we want.
* @return the property values as obtained from the delegate node.
*/
Map<QName, Serializable> getDelegateProperties(NodeRef nodeRef, QName aspectName);
/**
* Gets the specified property value from the delegate node.
*
* @param nodeRef the node with the delegate.
* @param propertyName the property name which we want.
* @return the property value as obtained from the delegate node.
*/
Serializable getDelegateProperty(NodeRef nodeRef, QName propertyName);
/**
* Determines if a given aspect is present on a node's delegates.
*
* @param nodeRef the node for which a delegate is sought.
* @param aspectName the aspect which is to be checked.
* @return Returns true if the aspect has been applied to one of the given node's delegates,
* otherwise false
*/
boolean hasAspectOnDelegate(NodeRef nodeRef, QName aspectName);
/**
* Gets all {@link Delegation delegations} currently attached to the specified node.
*
* @param nodeRef the node whose delegations are sought.
* @return Returns a map of all {@link Delegation delegations} by NodeRef for the specified nodeRef.
*/
Map<Delegation, NodeRef> getDelegations(NodeRef nodeRef);
}

44
rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/metadatadelegation/Delegation.java → rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/referredmetadata/MetadataReferral.java
View File

@@ -16,9 +16,9 @@
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
package org.alfresco.module.org_alfresco_module_rm.metadatadelegation;
package org.alfresco.module.org_alfresco_module_rm.referredmetadata;
import org.alfresco.module.org_alfresco_module_rm.metadatadelegation.DelegationException.InvalidDelegation;
import org.alfresco.module.org_alfresco_module_rm.referredmetadata.ReferredMetadataException.InvalidMetadataReferral;
import org.alfresco.service.cmr.dictionary.DictionaryService;
import org.alfresco.service.namespace.QName;
@@ -27,27 +27,29 @@ import java.util.Objects;
import java.util.Set;
/**
* A Delegation is a definition of a {@link #aspects set of aspects} whose metadata are to be delegated.
* Using a Delegation, you can attach a delegate node to any node and {@code hasAspect} and
* {@code getPropert[y|ies]} calls can be delegated to the delegate node.
* A {@link MetadataReferral} is a definition of a {@link #aspects set of metadata} which are, in effect, shared
* between multiple nodes.
* Using a {@link MetadataReferral}, you can link two NodeRefs such that {@code hasAspect} and
* {@code getPropert[y|ies]} calls on one node can can be delegated to the other. In this way a defined set of
* metadata on one node can be made available for read access via another node.
* <p/>
* The connection between the nodes is made with a specified {@link #assocType peer association}.
*<p/>
* Note that a Delegation is not an instance of a link between two nodes, but the definition of such a link.
* Note that a {@link MetadataReferral} is not an instance of a link between two nodes, but the definition of such a link.
*
* @author Neil Mc Erlean
* @since 3.0.a
* @since 2.4.a
*/
public class Delegation
public class MetadataReferral
{
private DictionaryService dictionaryService;
private DelegationRegistry delegationRegistry;
private ReferralRegistry referralRegistry;
private Set<QName> aspects;
private QName assocType;
public Delegation()
public MetadataReferral()
{
// Intentionally empty
// Intentionally empty.
}
public void setDictionaryService(DictionaryService service)
@@ -55,9 +57,9 @@ public class Delegation
this.dictionaryService = service;
}
public void setDelegationRegistry(DelegationRegistry registry)
public void setReferralRegistry(ReferralRegistry registry)
{
this.delegationRegistry = registry;
this.referralRegistry = registry;
}
public void setAssocType(QName assocType)
@@ -74,25 +76,25 @@ public class Delegation
{
if (this.assocType == null)
{
throw new InvalidDelegation("Illegal null assocType");
throw new InvalidMetadataReferral("Illegal null assocType");
}
if (aspects == null || aspects.isEmpty())
{
throw new InvalidDelegation("Illegal null or empty aspects set");
throw new InvalidMetadataReferral("Illegal null or empty aspects set");
}
if (dictionaryService.getAssociation(assocType) == null)
{
throw new InvalidDelegation("Association not found: " + assocType);
throw new InvalidMetadataReferral("Association not found: " + assocType);
}
for (QName aspect : aspects)
{
if (dictionaryService.getAspect(aspect) == null)
{
throw new InvalidDelegation("Aspect not found: " + aspect);
throw new InvalidMetadataReferral("Aspect not found: " + aspect);
}
}
this.delegationRegistry.register(this);
this.referralRegistry.register(this);
}
/** Gets the type of the peer association linking the node to its delegate. */
@@ -101,7 +103,7 @@ public class Delegation
return assocType;
}
/** Gets the set of aspects which are being delegated. */
/** Gets the set of aspects which are being referred. */
public Set<QName> getAspects()
{
return Collections.unmodifiableSet(aspects);
@@ -115,9 +117,9 @@ public class Delegation
@Override public boolean equals(Object other)
{
boolean result = false;
if (other instanceof Delegation)
if (other instanceof MetadataReferral)
{
Delegation that = (Delegation)other;
MetadataReferral that = (MetadataReferral)other;
result = this.aspects.equals(that.aspects) &&
this.assocType.equals(that.assocType);
}

103
rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/referredmetadata/ReferralAdminService.java Normal file
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@@ -0,0 +1,103 @@
/*
* Copyright (C) 2005-2015 Alfresco Software Limited.
*
* This file is part of Alfresco
*
* Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alfresco is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
package org.alfresco.module.org_alfresco_module_rm.referredmetadata;
import static org.alfresco.module.org_alfresco_module_rm.referredmetadata.ReferredMetadataException.ChainedMetadataReferralUnsupported;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.namespace.QName;
import java.util.Set;
/**
* A service to manage the referral of aspect metadata.
* Using this service a node can be {@link #attachReferrer linked} to a referrer node for a specific set of aspects.
* (Note that this referrer node must already exist within the database.)
* Then any read request for relevant metadata such as hasAspect or getProperties can be delegated to the
* linked node.
* <p/>
* For a link to be made, there must be a {@link #getDefinedReferrals() defined MetadataReferral} already in the system.
* This means that a peer-association type will have to have been declared and that a spring bean will have to have
* defined which aspects are to be handled by this {@link MetadataReferral}.
*
* @author Neil Mc Erlean
* @since 2.4.a
*/
public interface ReferralAdminService
{
/**
* Creates a link between two nodes such that the first {@code referrer} can 'inherit' or reuse some aspect
* metadata from another node - the {@code referrer}.
* <p/>
* Note that links can currently only extend between two pairs of nodes and cannot be chained.
*
* @param referrer the node which is to inherit additional metadata.
* @param referent the node which will provide the additional metadata.
* @param assocType the type of the peer association which will link the two nodes.
* @return a {@link MetadataReferral} object which defines the link type.
* @throws ChainedMetadataReferralUnsupported if an attempt is made to attach nodes such that a chain would be made.
*/
// FIXME Remove assocType entirely from the API
MetadataReferral attachReferrer(NodeRef referrer, NodeRef referent, QName assocType);
/**
* Removes an existing metadata link between two nodes.
*
* @param referrer the node which has been linked to a metadata source.
* @param assocType the type of the peer association forming the link.
* @return the removed {@link MetadataReferral}.
*/
MetadataReferral detachReferrer(NodeRef referrer, QName assocType);
/**
* Gets the set of defined {@link MetadataReferral}s.
*
* @return the set of defined {@link MetadataReferral}.
*/
Set<MetadataReferral> getDefinedReferrals();
/**
* Gets the {@link MetadataReferral} which contains the specified {@code aspectName} if there is one.
* Note that only one {@link MetadataReferral} may declare that it handles any particular aspect.
*
* @param aspectName the name of the aspect whose {@link MetadataReferral} is sought.
* @return the {@link MetadataReferral} which handles the specified aspect, if there is one.
*/
MetadataReferral getReferralFor(QName aspectName);
/**
* Gets the set of {@link MetadataReferral}s which are currently applied from the specified {@code referrer}.
* From these, the types of peer associations which are linked to the specified
* {@code referrer} as well as the aspect types that are handled can be retrieved.
*
* @param referrer the NodeRef whose {@link MetadataReferral}s are sought.
* @return the set of {@link MetadataReferral}s from the specified referrer.
*/
Set<MetadataReferral> getAttachedReferralsFrom(NodeRef referrer);
/**
* Gets the {@link MetadataReferral} from the specified {@code referrer} for the specified {@code aspectName},
* if there is one.
*
* @param referrer the node whose {@link MetadataReferral} is sought.
* @param aspectName the aspect name for which a {@link MetadataReferral} is sought.
* @return the {@link MetadataReferral} which is attached to the specified node if there is one, else {@code null}.
*/
MetadataReferral getAttachedReferralFrom(NodeRef referrer, QName aspectName);
}

179
rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/referredmetadata/ReferralAdminServiceImpl.java Normal file
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@@ -0,0 +1,179 @@
/*
* Copyright (C) 2005-2015 Alfresco Software Limited.
*
* This file is part of Alfresco
*
* Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alfresco is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
package org.alfresco.module.org_alfresco_module_rm.referredmetadata;
import static org.alfresco.util.collections.CollectionUtils.transform;
import org.alfresco.module.org_alfresco_module_rm.referredmetadata.ReferredMetadataException.ChainedMetadataReferralUnsupported;
import org.alfresco.service.cmr.repository.AssociationRef;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.cmr.repository.NodeService;
import org.alfresco.service.namespace.QName;
import org.alfresco.util.collections.Function;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* @author Neil Mc Erlean
* @since 2.4.a
*/
public class ReferralAdminServiceImpl implements ReferralAdminService
{
private ReferralRegistry registry;
private NodeService nodeService;
public void setNodeService(NodeService service)
{
this.nodeService = service;
}
public void setReferralRegistry(ReferralRegistry registry)
{
this.registry = registry;
}
@Override public MetadataReferral attachReferrer(NodeRef referrer, NodeRef referent, QName assocType)
{
final MetadataReferral metadataReferral = getReferralForAssociation(assocType);
// Prevent the creation of chains of metadata linking from node A to B to C.
// If any nodes are already linked to referrer for the specified assoc, then we can't chain.
final List<AssociationRef> existingReferrerAssocs = nodeService.getSourceAssocs(referrer, assocType);
if ( !existingReferrerAssocs.isEmpty())
{
final List<NodeRef> existingReferrers = transform(existingReferrerAssocs,
new Function<AssociationRef, NodeRef>()
{
@Override public NodeRef apply(AssociationRef assocRef)
{
return assocRef.getSourceRef();
}
});
throw new ChainedMetadataReferralUnsupported("Cannot attach referrer", existingReferrers);
}
// Likewise if this referent node is already itself linked elsewhere, we cannot chain.
final List<AssociationRef> existingReferentAssocs = nodeService.getTargetAssocs(referent, assocType);
if ( !existingReferentAssocs.isEmpty())
{
// If it's not empty, it should only have one value in it, but just in case...
final List<NodeRef> existingReferents = transform(existingReferentAssocs,
new Function<AssociationRef, NodeRef>()
{
@Override public NodeRef apply(AssociationRef assocRef)
{
return assocRef.getTargetRef();
}
});
throw new ChainedMetadataReferralUnsupported("Cannot attach referent", existingReferents);
}
// OK. We're good to go. We're not making a chain here.
nodeService.createAssociation(referrer, referent, assocType);
return metadataReferral;
}
/** Gets the {@link MetadataReferral} which uses the specified {@code assocType}. */
private MetadataReferral getReferralForAssociation(QName assocType)
{
final MetadataReferral metadataReferral = registry.getReferralForAssociation(assocType);
if (metadataReferral == null)
{
throw new IllegalArgumentException("No " + MetadataReferral.class.getSimpleName() +
" configured for assocType " + assocType);
}
return metadataReferral;
}
@Override public MetadataReferral detachReferrer(NodeRef referrer, QName assocType)
{
// Is the association there?
final List<AssociationRef> assocs = nodeService.getTargetAssocs(referrer, assocType);
if (assocs == null || assocs.isEmpty())
{
return null;
}
else
{
MetadataReferral result = getReferralForAssociation(assocType);
// There should only be one such association... but we'll remove them all just in case
for (AssociationRef assocRef : assocs)
{
nodeService.removeAssociation(referrer, assocRef.getTargetRef(), assocType);
}
return result;
}
}
@Override public MetadataReferral getReferralFor(QName aspectName)
{
MetadataReferral metadataReferral = null;
for (MetadataReferral d : getDefinedReferrals())
{
if (d.getAspects().contains(aspectName))
{
metadataReferral = d;
break;
}
}
return metadataReferral;
}
@Override public Set<MetadataReferral> getAttachedReferralsFrom(NodeRef referrer)
{
final Set<MetadataReferral> allMetadataReferrals = getDefinedReferrals();
final Set<MetadataReferral> result = new HashSet<>();
for (MetadataReferral d : allMetadataReferrals)
{
final QName assocType = d.getAssocType();
if ( !nodeService.getTargetAssocs(referrer, assocType).isEmpty())
{
result.add(d);
}
}
return result;
}
@Override public MetadataReferral getAttachedReferralFrom(NodeRef referrer, QName aspectName)
{
final Set<MetadataReferral> allMetadataReferrals = getAttachedReferralsFrom(referrer);
for (MetadataReferral d : allMetadataReferrals)
{
if (d.getAspects().contains(aspectName)) return d;
}
return null;
}
@Override public Set<MetadataReferral> getDefinedReferrals()
{
return registry.getMetadataReferrals();
}
}

91
rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/referredmetadata/ReferralRegistry.java Normal file
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@@ -0,0 +1,91 @@
/*
* Copyright (C) 2005-2015 Alfresco Software Limited.
*
* This file is part of Alfresco
*
* Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alfresco is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
package org.alfresco.module.org_alfresco_module_rm.referredmetadata;
import org.alfresco.module.org_alfresco_module_rm.referredmetadata.ReferredMetadataException.MetadataReferralAlreadyExists;
import org.alfresco.module.org_alfresco_module_rm.referredmetadata.ReferredMetadataException.InvalidMetadataReferral;
import org.alfresco.service.namespace.QName;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/**
* This is a registry of {@link MetadataReferral}s which have been defined in the system.
*
* @author Neil Mc Erlean
* @since 2.4.a
*/
public class ReferralRegistry
{
private final Set<MetadataReferral> metadataReferrals = new HashSet<>();
public void register(MetadataReferral metadataReferral)
{
// Various validation steps to do here to ensure we get consistent, sensible referrals registered.
if (metadataReferrals.contains(metadataReferral))
{
throw new MetadataReferralAlreadyExists("Cannot register duplicate referral", metadataReferral);
}
for (MetadataReferral existingMetadataReferral : metadataReferrals)
{
if (existingMetadataReferral.getAssocType().equals(metadataReferral.getAssocType()))
{
throw new InvalidMetadataReferral("Cannot register two referrals with the same assocType. " +
"Existing: " + existingMetadataReferral +
" New: " + metadataReferral);
}
// Yes this is a for loop inside a for loop but we're assuming these sets will not be large.
for (QName existingAspect : existingMetadataReferral.getAspects())
{
if (metadataReferral.getAspects().contains(existingAspect))
{
throw new InvalidMetadataReferral("Cannot register two referrals with the same aspect. " +
"Existing: " + existingMetadataReferral +
" New: " + metadataReferral);
}
}
}
this.metadataReferrals.add(metadataReferral);
}
public Set<MetadataReferral> getMetadataReferrals()
{
return Collections.unmodifiableSet(metadataReferrals);
}
/**
* Gets the {@link MetadataReferral} which is defined to use the specified {@code assocType}.
*
* @param assocType the peer association type whose {@link MetadataReferral} is sought.
* @return the {@link MetadataReferral} defined to use the specified {@code assocType} if there is one, else {@code null}.
*/
public MetadataReferral getReferralForAssociation(QName assocType)
{
for (MetadataReferral d : metadataReferrals)
{
if (d.getAssocType().equals(assocType))
{
return d;
}
}
return null;
}
}

109
rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/referredmetadata/ReferredMetadataException.java Normal file
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@@ -0,0 +1,109 @@
/*
* Copyright (C) 2005-2015 Alfresco Software Limited.
*
* This file is part of Alfresco
*
* Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alfresco is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
package org.alfresco.module.org_alfresco_module_rm.referredmetadata;
import org.alfresco.error.AlfrescoRuntimeException;
import org.alfresco.service.cmr.repository.NodeRef;
import java.util.List;
/**
* Generic class for any runtime exceptions related to metadata referrals.
*
* @author Neil Mc Erlean
* @since 2.4.a
*/
public class ReferredMetadataException extends AlfrescoRuntimeException
{
public ReferredMetadataException(String msgId) { super(msgId); }
public ReferredMetadataException(String msgId, Throwable cause) { super(msgId, cause); }
/** This exception may be thrown when a {@link MetadataReferral} was incorrectly initialised. */
public static class InvalidMetadataReferral extends ReferredMetadataException
{
public InvalidMetadataReferral(String msgId)
{
super(msgId);
}
}
/** This exception may be thrown when a {@link MetadataReferral} already exists. */
public static class MetadataReferralAlreadyExists extends ReferredMetadataException
{
private final MetadataReferral metadataReferral;
public MetadataReferralAlreadyExists(String msgId, MetadataReferral metadataReferral)
{
super(msgId);
this.metadataReferral = metadataReferral;
}
}
/** A {@link MetadataReferral} has not been found. */
public static class MetadataReferralNotFound extends ReferredMetadataException
{
public MetadataReferralNotFound(String msgId)
{
super(msgId);
}
}
/** A referent Node has not been found. */
public static class ReferentNodeNotFound extends ReferredMetadataException
{
public ReferentNodeNotFound(String msgId)
{
super(msgId);
}
}
/** Exception to report that chains of metadata referral are not currently supported. */
public static class ChainedMetadataReferralUnsupported extends ReferredMetadataException
{
private final List<NodeRef> existingReferrers;
public ChainedMetadataReferralUnsupported(String msgId, List<NodeRef> existingReferrers)
{
super(msgId);
this.existingReferrers = existingReferrers;
}
public List<NodeRef> getExistingReferrers()
{
return this.existingReferrers;
}
@Override public String toString()
{
StringBuilder msg = new StringBuilder();
msg.append(this.getClass().getSimpleName()).append(" Already referring from: ")
.append(existingReferrers.toString());
return msg.toString();
}
}
/** Exception to report that metadata referral is not supported for metadata defined on content types. */
public static class TypeMetadataReferralUnsupported extends ReferredMetadataException
{
public TypeMetadataReferralUnsupported(String msgId)
{
super(msgId);
}
}
}

102
rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/referredmetadata/ReferredMetadataService.java Normal file
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@@ -0,0 +1,102 @@
/*
* Copyright (C) 2005-2015 Alfresco Software Limited.
*
* This file is part of Alfresco
*
* Alfresco is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Alfresco is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
package org.alfresco.module.org_alfresco_module_rm.referredmetadata;
import static org.alfresco.module.org_alfresco_module_rm.referredmetadata.ReferredMetadataException.MetadataReferralNotFound;
import static org.alfresco.module.org_alfresco_module_rm.referredmetadata.ReferredMetadataException.TypeMetadataReferralUnsupported;
import org.alfresco.service.cmr.repository.InvalidNodeRefException;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.namespace.QName;
import java.io.Serializable;
import java.util.Map;
/**
* This service provides read-only access to linked metadata.
* TODO complete! Include definition of referent etc or link to package.html
*
* @author Neil Mc Erlean
* @since 2.4.a
*/
public interface ReferredMetadataService
{
/**
* Checks if the specified referrer has an attached {@link MetadataReferral} for the specified aspect.
*
* @param potentialReferrer the referrer which may or may not be linked to a referent node.
* @param aspectName the name of the aspect.
* @return whether the node is linked to a referent node for the specified aspect.
* @throws InvalidNodeRefException if the supplied referrer does not exist.
* @throws MetadataReferralNotFound if no {@link MetadataReferral} is defined for the specified aspect.
*/
boolean isReferringMetadata(NodeRef potentialReferrer, QName aspectName);
/**
* Gets the referent node for the specified aspect, if there is one.
*
* @param referrer the node whose referent is sought.
* @param aspectName the aspect name.
* @return the referent of the provided referrer if there is one, else {@code null}.
* @throws InvalidNodeRefException if the supplied referrer does not exist.
* @throws MetadataReferralNotFound if no {@link MetadataReferral} is defined for the specified aspect.
*/
NodeRef getReferentNode(NodeRef referrer, QName aspectName);
/**
* Gets all the property values from the referent node for the specified aspect.
*
* @param referrer the referring node.
* @param aspectName the aspect name which holds the properties we want.
* @return the property values as obtained from the referent node.
*/
Map<QName, Serializable> getReferredProperties(NodeRef referrer, QName aspectName);
/**
* Gets the specified property value from the referent node.
*
* @param referrer the referring node.
* @param propertyName the property name whose value is sought.
* @return the property value as obtained from the referent node.
* @throws IllegalArgumentException if the specified property is not defined.
* @throws TypeMetadataReferralUnsupported if the specified property is not defined on an aspect.
*/
Serializable getReferredProperty(NodeRef referrer, QName propertyName);
/**
* Determines if the specified aspect is present on a node's referent.
*
* @param referrer the referring node.
* @param aspectName the aspect which is to be checked on the referent node.
* @return Returns true if the aspect has been applied to the referent node,
* otherwise false
*/
boolean hasReferredAspect(NodeRef referrer, QName aspectName);
/**
* Gets all {@link MetadataReferral referrals} currently attached to the specified node.
*
* @param potentialReferrer the node whose attached {@link MetadataReferral referrals} are sought.
* @return Returns a map of all attached {@link MetadataReferral referrals} for the specified nodeRef.
* The map has the form {@code (key, value) = (MetadataReferral, referent Node for that Referral)}
* The map may be empty but will not be {@code null}.
*/
Map<MetadataReferral, NodeRef> getAttachedReferrals(NodeRef potentialReferrer);
}

93
rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/metadatadelegation/DelegationServiceImpl.java → rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/referredmetadata/ReferredMetadataServiceImpl.java
View File

@@ -16,10 +16,11 @@
* You should have received a copy of the GNU Lesser General Public License
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
package org.alfresco.module.org_alfresco_module_rm.metadatadelegation;
package org.alfresco.module.org_alfresco_module_rm.referredmetadata;
import static org.alfresco.module.org_alfresco_module_rm.metadatadelegation.DelegationException.DelegateNotFound;
import static org.alfresco.module.org_alfresco_module_rm.metadatadelegation.DelegationException.DelegationNotFound;
import static org.alfresco.module.org_alfresco_module_rm.referredmetadata.ReferredMetadataException.MetadataReferralNotFound;
import static org.alfresco.module.org_alfresco_module_rm.referredmetadata.ReferredMetadataException.ReferentNodeNotFound;
import static org.alfresco.module.org_alfresco_module_rm.referredmetadata.ReferredMetadataException.TypeMetadataReferralUnsupported;
import static org.alfresco.util.collections.CollectionUtils.filterKeys;
import org.alfresco.service.cmr.dictionary.ClassDefinition;
@@ -40,17 +41,17 @@ import java.util.Set;
/**
* @author Neil Mc Erlean
* @since 3.0.a
* @since 2.4.a
*/
public class DelegationServiceImpl implements DelegationService
public class ReferredMetadataServiceImpl implements ReferredMetadataService
{
private DelegationAdminService delegationAdminService;
private DictionaryService dictionaryService;
private NodeService nodeService;
private ReferralAdminService referralAdminService;
private DictionaryService dictionaryService;
private NodeService nodeService;
public void setDelegationAdminService(DelegationAdminService service)
public void setReferralAdminService(ReferralAdminService service)
{
this.delegationAdminService = service;
this.referralAdminService = service;
}
public void setDictionaryService(DictionaryService service)
@@ -63,54 +64,60 @@ public class DelegationServiceImpl implements DelegationService
this.nodeService = service;
}
@Override public boolean hasDelegateForAspect(NodeRef nodeRef, QName aspectName)
@Override public boolean isReferringMetadata(NodeRef potentialReferrer, QName aspectName)
{
final Delegation delegation = delegationAdminService.getDelegationFor(aspectName);
if ( !nodeService.exists(nodeRef))
if ( !nodeService.exists(potentialReferrer))
{
throw new InvalidNodeRefException(nodeRef);
throw new InvalidNodeRefException(potentialReferrer);
}
else if (delegation == null)
final MetadataReferral metadataReferral = referralAdminService.getReferralFor(aspectName);
if (metadataReferral == null)
{
throw new DelegationNotFound("No delegation found for aspect: " + aspectName);
throw new MetadataReferralNotFound("No defined referral found for aspect: " + aspectName);
}
else
{
final List<AssociationRef> targetAssocs = nodeService.getTargetAssocs(nodeRef, delegation.getAssocType());
final List<AssociationRef> targetAssocs = nodeService.getTargetAssocs(potentialReferrer, metadataReferral.getAssocType());
return !targetAssocs.isEmpty();
}
}
@Override public NodeRef getDelegateFor(NodeRef nodeRef, QName aspectName)
@Override public NodeRef getReferentNode(NodeRef referrer, QName aspectName)
{
final Delegation d = delegationAdminService.getDelegationFor(aspectName);
if ( !nodeService.exists(referrer))
{
throw new InvalidNodeRefException(referrer);
}
final MetadataReferral d = referralAdminService.getReferralFor(aspectName);
if (d == null)
{
throw new DelegationNotFound("No delegation found for aspect: " + aspectName);
throw new MetadataReferralNotFound("No defined referral found for aspect: " + aspectName);
}
else
{
final QName assocType = d.getAssocType();
final List<AssociationRef> assocs = nodeService.getTargetAssocs(nodeRef, assocType);
final List<AssociationRef> assocs = nodeService.getTargetAssocs(referrer, assocType);
return assocs.isEmpty() ? null : assocs.get(0).getTargetRef();
}
}
@Override public Map<QName, Serializable> getDelegateProperties(NodeRef nodeRef, final QName aspectName)
@Override public Map<QName, Serializable> getReferredProperties(NodeRef referrer, final QName aspectName)
{
final NodeRef delegateNode = getDelegateFor(nodeRef, aspectName);
final NodeRef referentNode = getReferentNode(referrer, aspectName);
if (delegateNode == null)
if (referentNode == null)
{
throw new DelegateNotFound("No delegate node found for " + nodeRef + " " + aspectName);
throw new ReferentNodeNotFound("No referent node found for " + referrer + " " + aspectName);
}
else
{
Map<QName, Serializable> allProps = nodeService.getProperties(delegateNode);
Map<QName, Serializable> aspectProps = filterKeys(allProps,
final Map<QName, Serializable> allProps = nodeService.getProperties(referentNode);
final Map<QName, Serializable> aspectProps = filterKeys(allProps,
new Function<QName, Boolean>()
{
@Override public Boolean apply(QName propName)
@@ -125,7 +132,7 @@ public class DelegationServiceImpl implements DelegationService
}
}
@Override public Serializable getDelegateProperty(NodeRef nodeRef, QName propertyName)
@Override public Serializable getReferredProperty(NodeRef referrer, QName propertyName)
{
final PropertyDefinition propDefn = dictionaryService.getProperty(propertyName);
@@ -141,38 +148,38 @@ public class DelegationServiceImpl implements DelegationService
msg.append("Property '").append(propertyName).append("' is not defined on an aspect: ")
.append(aspectDefn.getName());
throw new IllegalArgumentException(msg.toString());
throw new TypeMetadataReferralUnsupported(msg.toString());
}
Map<QName, Serializable> allPropValues = getDelegateProperties(nodeRef, aspectDefn.getName());
final Map<QName, Serializable> allPropValues = getReferredProperties(referrer, aspectDefn.getName());
return allPropValues.get(propertyName);
}
@Override public boolean hasAspectOnDelegate(NodeRef nodeRef, QName aspectName)
@Override public boolean hasReferredAspect(NodeRef referrer, QName aspectName)
{
final NodeRef delegateNode = getDelegateFor(nodeRef, aspectName);
final NodeRef referentNode = getReferentNode(referrer, aspectName);
if (delegateNode == null)
if (referentNode == null)
{
throw new DelegateNotFound("No delegate node found for " + nodeRef + " " + aspectName);
throw new ReferentNodeNotFound("No referent node found for " + referrer + " " + aspectName);
}
else
{
return nodeService.hasAspect(delegateNode, aspectName);
return nodeService.hasAspect(referentNode, aspectName);
}
}
@Override public Map<Delegation, NodeRef> getDelegations(NodeRef nodeRef)
@Override public Map<MetadataReferral, NodeRef> getAttachedReferrals(NodeRef potentialReferrer)
{
Set<Delegation> delegations = delegationAdminService.getDelegationsFrom(nodeRef);
Set<MetadataReferral> metadataReferrals = referralAdminService.getAttachedReferralsFrom(potentialReferrer);
Map<Delegation, NodeRef> result = new HashMap<>();
for (Delegation d : delegations)
Map<MetadataReferral, NodeRef> result = new HashMap<>();
for (MetadataReferral mr : metadataReferrals)
{
// We need only use the first aspect to get the Delegation object
if (!d.getAspects().isEmpty())
// We need only use the first aspect to get the MetadataReferral object
if (!mr.getAspects().isEmpty())
{
result.put(d, getDelegateFor(nodeRef, d.getAspects().iterator().next()));
result.put(mr, getReferentNode(potentialReferrer, mr.getAspects().iterator().next()));
}
}

29
rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/metadatadelegation/package-info.java → rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/referredmetadata/package-info.java
View File

@@ -17,30 +17,31 @@
* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* This package contains the types that deliver the Metadata Delegation feature.
* Metadata delegation allows read-only <em>aspect</em> metadata for any given Alfresco node to
* be sourced from another node, the delegate.
* This package contains the types that deliver the Metadata Referral feature.
* Metadata referral allows node metadata to be shared between multiple Alfresco nodes.
* <p/>
* In this way nodes can 'inherit' some of their metadata from another node which may
* have benefits when more than one node is required to share some of the same metadata.
* <p/>
* Multiple nodes may share the same delegate node and one node may be linked to multiple
* delegates.
* Only aspect metadata can be shared and it is only shared as read-only data to the other nodes.
* The node which contains the metadata values is the 'referent' node and any nodes which have been
* linked to the referent and share the metadata are known as referrers.
* <p/>
* The linking of nodes to their metadata delegates is done with Alfresco peer associations.
* Multiple nodes may share the same referent node and one node may be linked to multiple referrers.
* <p/>
* The linking of nodes to their metadata referents is done with Alfresco peer associations.
* Association types must be declared in an Alfresco content model in the normal way.
* Spring configuration is used to assign each association type a set of aspects which will
* be available from the delegate via the association.
* be available from the referent via the association.
* <p/>
* See {@link org.alfresco.module.org_alfresco_module_rm.metadatadelegation.DelegationAdminService}
* for details on how to create and destroy delegation links between nodes.
* See {@link org.alfresco.module.org_alfresco_module_rm.referredmetadata.ReferralAdminService}
* for details on how to create and destroy metadata links between nodes.
* <p/>
* The read-only access to delegated metadat is made available via the
* See {@link org.alfresco.module.org_alfresco_module_rm.metadatadelegation.DelegationService}
* See {@link org.alfresco.module.org_alfresco_module_rm.referredmetadata.ReferredMetadataService}
* for details on how the data access is performed.
* <p/>
* See {@link org.alfresco.module.org_alfresco_module_rm.metadatadelegation.DelegationRegistry}
* for details on what {@link org.alfresco.module.org_alfresco_module_rm.metadatadelegation.Delegation}s
* See {@link org.alfresco.module.org_alfresco_module_rm.referredmetadata.ReferralRegistry}
* for details on what {@link org.alfresco.module.org_alfresco_module_rm.referredmetadata.MetadataReferral}s
* are defined in the system.
*/
package org.alfresco.module.org_alfresco_module_rm.metadatadelegation;
package org.alfresco.module.org_alfresco_module_rm.referredmetadata;