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CM-690 virtualization
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@117474 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
Bogdan Horje
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/*
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* Copyright (C) 2005-2015 Alfresco Software Limited.
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*
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* This file is part of Alfresco
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*
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* Alfresco is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Alfresco is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Alfresco. If not, see http://www.gnu.org/licenses/.
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*/
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package org.alfresco.repo.virtual.template;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Set;
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import org.alfresco.query.PagingRequest;
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import org.alfresco.query.PagingResults;
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import org.alfresco.repo.search.EmptyResultSet;
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import org.alfresco.repo.virtual.ActualEnvironment;
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import org.alfresco.repo.virtual.ActualEnvironmentException;
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import org.alfresco.repo.virtual.VirtualizationException;
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import org.alfresco.repo.virtual.ref.NodeProtocol;
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import org.alfresco.repo.virtual.ref.Reference;
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import org.alfresco.service.cmr.repository.StoreRef;
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import org.alfresco.service.cmr.search.QueryConsistency;
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import org.alfresco.service.cmr.search.ResultSet;
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import org.alfresco.service.cmr.search.ResultSetRow;
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import org.alfresco.service.cmr.search.SearchParameters;
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import org.alfresco.service.cmr.search.SearchService;
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import org.alfresco.service.namespace.QName;
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import org.alfresco.util.Pair;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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public class VirtualQueryImpl implements VirtualQuery
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{
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private static Log logger = LogFactory.getLog(VirtualQueryImpl.class);
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private String language;
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private String store;
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private String query;
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public VirtualQueryImpl(String store, String language, String query)
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{
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super();
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this.language = language;
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this.store = store;
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this.query = query;
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}
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@Override
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public String getLanguage()
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{
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return language;
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}
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@Override
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public String getStoreRef()
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{
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return store;
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}
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@Override
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public String getQueryString()
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{
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return query;
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}
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/**
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* @deprecated will be replaced by
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* {@link #perform(ActualEnvironment, VirtualQueryConstraint,Reference)}
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* once complex constrains are implemented
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*/
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@Override
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public PagingResults<Reference> perform(ActualEnvironment environment, boolean files, boolean folders,
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String pattern, Set<QName> ignoreTypeQNames, Set<QName> searchTypeQNames, Set<QName> ignoreAspectQNames,
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List<Pair<QName, Boolean>> sortProps, PagingRequest pagingRequest, Reference parentReference)
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throws VirtualizationException
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{
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if (!files && !folders)
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{
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if (logger.isDebugEnabled())
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{
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logger.debug("Deprecated query will be skipped due do incompatible types request.");
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}
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return asPagingResults(environment,
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pagingRequest,
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new EmptyResultSet(),
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parentReference);
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}
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else
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{
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VirtualQueryConstraint constraint = BasicConstraint.INSTANCE;
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constraint = new FilesFoldersConstraint(constraint,
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files,
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folders);
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constraint = new IgnoreConstraint(constraint,
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ignoreTypeQNames,
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ignoreAspectQNames);
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constraint = new PagingRequestConstraint(constraint,
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pagingRequest);
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constraint = new SortConstraint(constraint,
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sortProps);
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return perform(environment,
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constraint,
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null,
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parentReference);
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}
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}
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/**
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* @deprecated will be replaced by {@link VirtualQueryConstraint}s once
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* complex constrains are implemented
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*/
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private String filter(String language, String query, boolean files, boolean folders) throws VirtualizationException
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{
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String filteredQuery = query;
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if (files ^ folders)
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{
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if (SearchService.LANGUAGE_FTS_ALFRESCO.equals(language))
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{
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if (!files)
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{
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filteredQuery = "(" + filteredQuery + ") and TYPE:\"cm:folder\"";
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}
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else
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{
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filteredQuery = "(" + filteredQuery + ") and TYPE:\"cm:content\"";
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}
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}
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else
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{
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throw new VirtualizationException("Disjunctive file-folder filters are only supported on "
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+ SearchService.LANGUAGE_FTS_ALFRESCO + " virtual query language.");
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}
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}
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return filteredQuery;
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}
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private PagingResults<Reference> asPagingResults(ActualEnvironment environment, PagingRequest pagingRequest,
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ResultSet result, Reference parentReference) throws ActualEnvironmentException
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{
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final List<Reference> page = new LinkedList<Reference>();
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for (ResultSetRow row : result)
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{
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page.add(NodeProtocol.newReference(row.getNodeRef(),
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parentReference));
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}
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final boolean hasMore = result.hasMore();
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final int totalFirst = (int) result.getNumberFound();
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int start;
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try
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{
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start = result.getStart();
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}
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catch (UnsupportedOperationException e)
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{
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if (logger.isDebugEnabled())
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{
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logger.debug("Unsupported ResultSet.getStart() when trying to create query paging result");
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}
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if (pagingRequest != null)
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{
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start = pagingRequest.getSkipCount();
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}
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else
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{
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start = 0;
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}
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}
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final int totlaSecond = !hasMore ? (int) result.getNumberFound() : (int) (start + result.getNumberFound() + 1);
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final Pair<Integer, Integer> total = new Pair<Integer, Integer>(totalFirst,
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totlaSecond);
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return new PagingResults<Reference>()
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{
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@Override
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public List<Reference> getPage()
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{
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return page;
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}
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@Override
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public boolean hasMoreItems()
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{
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return hasMore;
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}
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@Override
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public Pair<Integer, Integer> getTotalResultCount()
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{
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return total;
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}
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@Override
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public String getQueryExecutionId()
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{
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return null;
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}
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};
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}
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private SearchParameters createSearchParameters(boolean files, boolean folders, PagingRequest pagingRequest)
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throws VirtualizationException
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{
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SearchParameters searchParameters = new SearchParameters();
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if (store != null)
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{
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searchParameters.addStore(new StoreRef(store));
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}
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else
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{
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searchParameters.addStore(StoreRef.STORE_REF_WORKSPACE_SPACESSTORE);
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}
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searchParameters.setLanguage(language);
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searchParameters.setQuery(filter(language,
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query,
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files,
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folders));
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searchParameters.setQueryConsistency(QueryConsistency.TRANSACTIONAL_IF_POSSIBLE);
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if (pagingRequest != null)
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{
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searchParameters.setSkipCount(pagingRequest.getSkipCount());
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searchParameters.setMaxItems(pagingRequest.getMaxItems());
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}
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return searchParameters;
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}
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@Override
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public PagingResults<Reference> perform(ActualEnvironment environment, VirtualQueryConstraint constraint,
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PagingRequest pagingRequest, Reference parentReference) throws VirtualizationException
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{
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VirtualQueryConstraint theConstraint = constraint;
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if (pagingRequest != null)
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{
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theConstraint = new PagingRequestConstraint(theConstraint,
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pagingRequest);
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}
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SearchParameters searchParameters = theConstraint.apply(environment,
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this);
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ResultSet result = environment.query(searchParameters);
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if (logger.isDebugEnabled())
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{
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logger.debug("Constrained query " + searchParameters + " resulted in " + result.length() + " rows.");
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}
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return asPagingResults(environment,
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pagingRequest,
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result,
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parentReference);
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}
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}
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