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e5eb45da0f
LayeringDescriptor getLayeringInfo(version, path); LayeringDescriptor has three methods: isBackground() Is the looked up node a background node. getPathAVMStore() Gets a descriptor for the store the path was looked up in. getNativeAVMStore() Gets the store that the actual node was found in. git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@3348 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
929 lines
31 KiB
Java
929 lines
31 KiB
Java
/*
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* Copyright (C) 2006 Alfresco, Inc.
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*
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* Licensed under the Mozilla Public License version 1.1
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* with a permitted attribution clause. You may obtain a
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* copy of the License at
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*
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* http://www.alfresco.org/legal/license.txt
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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* either express or implied. See the License for the specific
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* language governing permissions and limitations under the
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* License.
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*/
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package org.alfresco.repo.avm;
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import java.io.File;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.io.RandomAccessFile;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.List;
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import java.util.SortedMap;
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/**
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* This or AVMStore are
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* the implementors of the operations specified by AVMService.
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* @author britt
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*/
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class AVMRepository
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{
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/**
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* The single instance of AVMRepository.
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*/
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private static AVMRepository fgInstance;
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/**
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* The current lookup count.
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*/
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private ThreadLocal<Integer> fLookupCount;
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/**
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* The node id issuer.
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*/
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private Issuer fNodeIssuer;
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/**
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* The content id issuer;
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*/
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private Issuer fContentIssuer;
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/**
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* The layer id issuer.
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*/
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private Issuer fLayerIssuer;
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/**
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* The file storage directory.
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*/
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private String fStorage;
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/**
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* Create a new one. It's given issuers and a storage directory.
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* @param nodeIssuer
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* @param contentIssuer
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* @param layerIssuer
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* @param storage
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*/
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public AVMRepository(Issuer nodeIssuer,
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Issuer contentIssuer,
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Issuer layerIssuer,
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String storage)
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{
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fStorage = storage;
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fNodeIssuer = nodeIssuer;
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fContentIssuer = contentIssuer;
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fLayerIssuer = layerIssuer;
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fLookupCount = new ThreadLocal<Integer>();
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fgInstance = this;
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}
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/**
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* Create a file.
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* @param path The path to the containing directory.
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* @param name The name for the new file.
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*/
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public OutputStream createFile(String path, String name)
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{
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fLookupCount.set(1);
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String[] pathParts = SplitPath(path);
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AVMStore rep = getAVMStoreByName(pathParts[0], true);
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// fSession.get().lock(rep, LockMode.UPGRADE);
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return rep.createFile(pathParts[1], name);
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}
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/**
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* Create a file with the given File as content.
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* @param path The path to the containing directory.
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* @param name The name to give the file.
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* @param data The file contents.
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*/
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public void createFile(String path, String name, File data)
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{
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fLookupCount.set(1);
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String[] pathParts = SplitPath(path);
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AVMStore rep = getAVMStoreByName(pathParts[0], true);
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rep.createFile(pathParts[1], name, data);
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}
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/**
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* Create a new directory.
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* @param path The path to the containing directory.
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* @param name The name to give the directory.
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*/
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public void createDirectory(String path, String name)
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{
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fLookupCount.set(1);
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String[] pathParts = SplitPath(path);
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AVMStore rep = getAVMStoreByName(pathParts[0], true);
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rep.createDirectory(pathParts[1], name);
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}
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/**
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* Create a new layered directory.
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* @param srcPath The target indirection for the new layered directory.
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* @param dstPath The path to the containing directory.
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* @param name The name for the new directory.
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*/
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public void createLayeredDirectory(String srcPath, String dstPath,
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String name)
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{
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if (dstPath.indexOf(srcPath) == 0)
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{
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throw new AVMCycleException("Cycle would be created.");
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}
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fLookupCount.set(1);
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String[] pathParts = SplitPath(dstPath);
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AVMStore rep = getAVMStoreByName(pathParts[0], true);
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// fSession.get().lock(rep, LockMode.UPGRADE);
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rep.createLayeredDirectory(srcPath, pathParts[1], name);
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}
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/**
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* Create a new layered file.
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* @param srcPath The target indirection for the new layered file.
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* @param dstPath The path to the containing directory.
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* @param name The name of the new layered file.
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*/
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public void createLayeredFile(String srcPath, String dstPath, String name)
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{
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fLookupCount.set(1);
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String[] pathParts = SplitPath(dstPath);
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AVMStore rep = getAVMStoreByName(pathParts[0], true);
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rep.createLayeredFile(srcPath, pathParts[1], name);
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}
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/**
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* Create a new AVMStore.
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* @param name The name to give the new AVMStore.
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*/
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public void createAVMStore(String name)
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{
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try
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{
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getAVMStoreByName(name, false);
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throw new AVMExistsException("AVMStore exists: " + name);
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}
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catch (AVMNotFoundException anf)
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{
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// Do nothing.
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}
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// Newing up the object causes it to be written to the db.
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@SuppressWarnings("unused")
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AVMStore rep = new AVMStoreImpl(this, name);
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// Special handling for AVMStore creation.
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NewInAVMStore newInRep = AVMContext.fgInstance.fNewInAVMStoreDAO.getByNode(rep.getRoot());
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AVMContext.fgInstance.fNewInAVMStoreDAO.delete(newInRep);
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}
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/**
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* Create a new branch.
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* @param version The version to branch off.
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* @param srcPath The path to make a branch from.
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* @param dstPath The containing directory.
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* @param name The name of the new branch.
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*/
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public void createBranch(int version, String srcPath, String dstPath, String name)
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{
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if (dstPath.indexOf(srcPath) == 0)
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{
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throw new AVMCycleException("Cycle would be created.");
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}
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// Lookup the src node.
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fLookupCount.set(1);
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String [] pathParts = SplitPath(srcPath);
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AVMStore srcRepo = getAVMStoreByName(pathParts[0], false);
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Lookup sPath = srcRepo.lookup(version, pathParts[1], false);
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// Lookup the destination directory.
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fLookupCount.set(1);
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pathParts = SplitPath(dstPath);
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AVMStore dstRepo = getAVMStoreByName(pathParts[0], true);
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Lookup dPath = dstRepo.lookupDirectory(-1, pathParts[1], true);
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DirectoryNode dirNode = (DirectoryNode)dPath.getCurrentNode();
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AVMNode srcNode = sPath.getCurrentNode();
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AVMNode dstNode = null;
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// We do different things depending on what kind of thing we're
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// branching from. I'd be considerably happier if we disallowed
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// certain scenarios, but Jon won't let me :P (bhp).
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if (srcNode.getType() == AVMNodeType.PLAIN_DIRECTORY)
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{
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dstNode = new PlainDirectoryNodeImpl((PlainDirectoryNode)srcNode, dstRepo);
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}
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else if (srcNode.getType() == AVMNodeType.LAYERED_DIRECTORY)
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{
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dstNode =
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new LayeredDirectoryNodeImpl((LayeredDirectoryNode)srcNode, dstRepo);
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((LayeredDirectoryNode)dstNode).setLayerID(issueLayerID());
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}
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else if (srcNode.getType() == AVMNodeType.LAYERED_FILE)
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{
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dstNode = new LayeredFileNodeImpl((LayeredFileNode)srcNode, dstRepo);
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}
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else // This is a plain file.
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{
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dstNode = new PlainFileNodeImpl((PlainFileNode)srcNode, dstRepo);
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}
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dstNode.setVersionID(dstRepo.getNextVersionID());
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dstNode.setAncestor(srcNode);
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dirNode.putChild(name, dstNode);
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dirNode.updateModTime();
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}
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/**
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* Get an output stream to a file.
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* @param path The full path to the file.
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* @return An OutputStream.
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*/
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public OutputStream getOutputStream(String path)
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{
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fLookupCount.set(1);
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String [] pathParts = SplitPath(path);
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AVMStore rep = getAVMStoreByName(pathParts[0], true);
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return rep.getOutputStream(pathParts[1]);
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}
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/**
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* Get a random access file from a file node.
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* @param version The version id (read-only if not -1)
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* @param path The path to the file.
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* @param access The access mode for RandomAccessFile.
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* @return A RandomAccessFile.
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*/
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public RandomAccessFile getRandomAccess(int version, String path, String access)
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{
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fLookupCount.set(1);
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String[] pathParts = SplitPath(path);
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AVMStore rep = getAVMStoreByName(pathParts[0], true);
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return rep.getRandomAccess(version, pathParts[1], access);
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}
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/**
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* Rename a node.
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* @param srcPath Source containing directory.
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* @param srcName Source name.
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* @param dstPath Destination containing directory.
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* @param dstName Destination name.
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*/
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public void rename(String srcPath, String srcName, String dstPath,
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String dstName)
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{
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// This is about as ugly as it gets.
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if (dstPath.indexOf(srcPath + srcName) == 0)
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{
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throw new AVMCycleException("Cyclic rename.");
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}
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fLookupCount.set(1);
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String [] pathParts = SplitPath(srcPath);
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AVMStore srcRepo = getAVMStoreByName(pathParts[0], true);
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Lookup sPath = srcRepo.lookupDirectory(-1, pathParts[1], true);
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DirectoryNode srcDir = (DirectoryNode)sPath.getCurrentNode();
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AVMNode srcNode = srcDir.lookupChild(sPath, srcName, -1, true);
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if (srcNode == null)
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{
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throw new AVMNotFoundException("Not found: " + srcName);
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}
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fLookupCount.set(1);
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pathParts = SplitPath(dstPath);
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AVMStore dstRepo = getAVMStoreByName(pathParts[0], true);
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Lookup dPath = dstRepo.lookupDirectory(-1, pathParts[1], true);
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DirectoryNode dstDir = (DirectoryNode)dPath.getCurrentNode();
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AVMNode dstNode = dstDir.lookupChild(dPath, dstName, -1, true);
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if (dstNode != null)
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{
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throw new AVMExistsException("Node exists: " + dstName);
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}
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// We've passed the check, so we can go ahead and do the rename.
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if (srcNode.getType() == AVMNodeType.PLAIN_DIRECTORY)
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{
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// If the source is layered then the renamed thing needs to be layered also.
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if (sPath.isLayered())
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{
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// If this is a rename happening in the same layer we make a new
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// OverlayedDirectoryNode that is not a primary indirection layer.
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// Otherwise we do make the new OverlayedDirectoryNode a primary
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// Indirection layer. This complexity begs the question of whether
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// we should allow renames from within one layer to within another
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// layer. Allowing it makes the logic absurdly complex.
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if (dPath.isLayered() && dPath.getTopLayer().equals(sPath.getTopLayer()))
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{
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dstNode = new LayeredDirectoryNodeImpl((PlainDirectoryNode)srcNode, dstRepo, sPath, false);
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((LayeredDirectoryNode)dstNode).setLayerID(sPath.getTopLayer().getLayerID());
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}
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else
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{
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dstNode = new LayeredDirectoryNodeImpl((DirectoryNode)srcNode, dstRepo, sPath, srcName);
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((LayeredDirectoryNode)dstNode).setLayerID(issueLayerID());
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}
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}
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else
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{
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dstNode = new PlainDirectoryNodeImpl((PlainDirectoryNode)srcNode, dstRepo);
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}
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}
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else if (srcNode.getType() == AVMNodeType.LAYERED_DIRECTORY)
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{
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// TODO I think I need to subdivide this logic again.
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// based on whether the destination is a layer or not.
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if (!sPath.isLayered() || (sPath.isInThisLayer() &&
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srcDir.getType() == AVMNodeType.LAYERED_DIRECTORY &&
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((LayeredDirectoryNode)srcDir).directlyContains(srcNode)))
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{
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// Use the simple 'copy' constructor.
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dstNode =
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new LayeredDirectoryNodeImpl((LayeredDirectoryNode)srcNode, dstRepo);
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((LayeredDirectoryNode)dstNode).setLayerID(((LayeredDirectoryNode)srcNode).getLayerID());
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}
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else
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{
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// If the source node is a primary indirection, then the 'copy' constructor
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// is used. Otherwise the alternate constructor is called and its
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// indirection is calculated from it's source context.
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if (((LayeredDirectoryNode)srcNode).getPrimaryIndirection())
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{
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dstNode =
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new LayeredDirectoryNodeImpl((LayeredDirectoryNode)srcNode, dstRepo);
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}
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else
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{
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dstNode =
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new LayeredDirectoryNodeImpl((DirectoryNode)srcNode, dstRepo, sPath, srcName);
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}
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// What needs to be done here is dependent on whether the
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// rename is to a layered context. If so then it should get the layer id
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// of its destination parent. Otherwise it should get a new layer
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// id.
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if (dPath.isLayered())
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{
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((LayeredDirectoryNode)dstNode).setLayerID(dPath.getTopLayer().getLayerID());
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}
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else
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{
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((LayeredDirectoryNode)dstNode).setLayerID(issueLayerID());
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}
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}
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}
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else if (srcNode.getType() == AVMNodeType.LAYERED_FILE)
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{
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dstNode = new LayeredFileNodeImpl((LayeredFileNode)srcNode, dstRepo);
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}
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else // This is a plain file node.
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{
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dstNode = new PlainFileNodeImpl((PlainFileNode)srcNode, dstRepo);
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}
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srcDir.removeChild(srcName);
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srcDir.updateModTime();
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dstNode.setVersionID(dstRepo.getNextVersionID());
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dstDir.putChild(dstName, dstNode);
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dstDir.updateModTime();
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dstNode.setAncestor(srcNode);
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}
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/**
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* Uncover a deleted name in a layered directory.
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* @param dirPath The path to the layered directory.
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* @param name The name to uncover.
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*/
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public void uncover(String dirPath, String name)
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{
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fLookupCount.set(1);
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String [] pathParts = SplitPath(dirPath);
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AVMStore repo = getAVMStoreByName(pathParts[0], true);
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repo.uncover(pathParts[1], name);
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}
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/**
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* Snapshot the given repositories.
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* @param repositories The list of AVMStore name to snapshot.
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* @return A List of version ids for each newly snapshotted AVMStore.
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*/
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public List<Integer> createSnapshot(List<String> repositories)
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{
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List<Integer> result = new ArrayList<Integer>();
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for (String repName : repositories)
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{
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AVMStore repo = getAVMStoreByName(repName, true);
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result.add(repo.createSnapshot());
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}
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return result;
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}
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/**
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* Create a snapshot of a single AVMStore.
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* @param store The name of the repository.
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* @return The version id of the newly snapshotted repository.
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*/
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public int createSnapshot(String storeName)
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{
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AVMStore store = getAVMStoreByName(storeName, true);
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return store.createSnapshot();
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}
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/**
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* Remove a node and everything underneath it.
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* @param path The path to the containing directory.
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* @param name The name of the node to remove.
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*/
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public void remove(String path, String name)
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{
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fLookupCount.set(1);
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String [] pathParts = SplitPath(path);
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AVMStore store = getAVMStoreByName(pathParts[0], true);
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store.removeNode(pathParts[1], name);
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}
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/**
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* Get rid of all content that lives only in the given AVMStore.
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* Also removes the AVMStore.
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* @param name The name of the AVMStore to purge.
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*/
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@SuppressWarnings("unchecked")
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public void purgeAVMStore(String name)
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{
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AVMStore store = getAVMStoreByName(name, true);
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AVMNode root = store.getRoot();
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root.setIsRoot(false);
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VersionRootDAO vrDAO = AVMContext.fgInstance.fVersionRootDAO;
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List<VersionRoot> vRoots = vrDAO.getAllInAVMStore(store);
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for (VersionRoot vr : vRoots)
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{
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AVMNode node = vr.getRoot();
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node.setIsRoot(false);
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vrDAO.delete(vr);
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}
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List<NewInAVMStore> newGuys = AVMContext.fgInstance.fNewInAVMStoreDAO.getByAVMStore(store);
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for (NewInAVMStore newGuy : newGuys)
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{
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AVMContext.fgInstance.fNewInAVMStoreDAO.delete(newGuy);
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}
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AVMContext.fgInstance.fAVMStoreDAO.delete(store);
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}
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/**
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* Remove all content specific to a AVMRepository and version.
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* @param name The name of the AVMStore.
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* @param version The version to purge.
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*/
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public void purgeVersion(String name, int version)
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{
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AVMStore store = getAVMStoreByName(name, true);
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store.purgeVersion(version);
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}
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/**
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* Get an input stream from a file.
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* @param version The version to look under.
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* @param path The path to the file.
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* @return An InputStream.
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*/
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public InputStream getInputStream(int version, String path)
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{
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fLookupCount.set(1);
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String [] pathParts = SplitPath(path);
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AVMStore store = getAVMStoreByName(pathParts[0], false);
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return store.getInputStream(version, pathParts[1]);
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}
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/**
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* Get an InputStream from a given version of a file.
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* @param desc The node descriptor.
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* @return The InputStream.
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*/
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public InputStream getInputStream(AVMNodeDescriptor desc)
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{
|
|
fLookupCount.set(1);
|
|
AVMNode node = AVMContext.fgInstance.fAVMNodeDAO.getByID(desc.getId());
|
|
if (node == null)
|
|
{
|
|
throw new AVMNotFoundException("Not found.");
|
|
}
|
|
if (node.getType() != AVMNodeType.PLAIN_FILE &&
|
|
node.getType() != AVMNodeType.LAYERED_FILE)
|
|
{
|
|
throw new AVMWrongTypeException("Not a file.");
|
|
}
|
|
FileNode file = (FileNode)node;
|
|
return file.getContentForRead().getInputStream();
|
|
}
|
|
|
|
/**
|
|
* Get a listing of a directory.
|
|
* @param version The version to look under.
|
|
* @param path The path to the directory.
|
|
* @return A List of FolderEntries.
|
|
*/
|
|
public SortedMap<String, AVMNodeDescriptor> getListing(int version, String path)
|
|
{
|
|
fLookupCount.set(1);
|
|
String [] pathParts = SplitPath(path);
|
|
AVMStore store = getAVMStoreByName(pathParts[0], false);
|
|
return store.getListing(version, pathParts[1]);
|
|
}
|
|
|
|
/**
|
|
* Get a directory listing from a directory node descriptor.
|
|
* @param dir The directory node descriptor.
|
|
* @return A SortedMap listing.
|
|
*/
|
|
public SortedMap<String, AVMNodeDescriptor> getListing(AVMNodeDescriptor dir)
|
|
{
|
|
fLookupCount.set(1);
|
|
AVMNode node = AVMContext.fgInstance.fAVMNodeDAO.getByID(dir.getId());
|
|
if (node.getType() != AVMNodeType.LAYERED_DIRECTORY &&
|
|
node.getType() != AVMNodeType.PLAIN_DIRECTORY)
|
|
{
|
|
throw new AVMWrongTypeException("Not a directory.");
|
|
}
|
|
DirectoryNode dirNode = (DirectoryNode)node;
|
|
return dirNode.getListing(dir);
|
|
}
|
|
|
|
/**
|
|
* Get descriptors of all AVMStores.
|
|
* @return A list of all descriptors.
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
public List<AVMStoreDescriptor> getAVMStores()
|
|
{
|
|
List<AVMStore> l = AVMContext.fgInstance.fAVMStoreDAO.getAll();
|
|
List<AVMStoreDescriptor> result = new ArrayList<AVMStoreDescriptor>();
|
|
for (AVMStore store : l)
|
|
{
|
|
result.add(store.getDescriptor());
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Get a descriptor for an AVMStore.
|
|
* @param name The name to get.
|
|
* @return The descriptor.
|
|
*/
|
|
public AVMStoreDescriptor getAVMStore(String name)
|
|
{
|
|
AVMStore store = getAVMStoreByName(name, false);
|
|
return store.getDescriptor();
|
|
}
|
|
|
|
/**
|
|
* Get all version for a given AVMStore.
|
|
* @param name The name of the AVMStore.
|
|
* @return A Set will all the version ids.
|
|
*/
|
|
public List<VersionDescriptor> getAVMStoreVersions(String name)
|
|
{
|
|
AVMStore store = getAVMStoreByName(name, false);
|
|
return store.getVersions();
|
|
}
|
|
|
|
/**
|
|
* Get the set of versions between (inclusive) of the given dates.
|
|
* From or to may be null but not both.
|
|
* @param name The name of the AVMRepository.
|
|
* @param from The earliest date.
|
|
* @param to The latest date.
|
|
* @return The Set of version IDs.
|
|
*/
|
|
public List<VersionDescriptor> getAVMStoreVersions(String name, Date from, Date to)
|
|
{
|
|
AVMStore store = getAVMStoreByName(name, false);
|
|
return store.getVersions(from, to);
|
|
}
|
|
|
|
/**
|
|
* Issue a node id.
|
|
* @return The new id.
|
|
*/
|
|
public long issueID()
|
|
{
|
|
return fNodeIssuer.issue();
|
|
}
|
|
|
|
/**
|
|
* Issue a content id.
|
|
* @return The new id.
|
|
*/
|
|
public long issueContentID()
|
|
{
|
|
return fContentIssuer.issue();
|
|
}
|
|
|
|
/**
|
|
* Issue a new layer id.
|
|
* @return The new id.
|
|
*/
|
|
public long issueLayerID()
|
|
{
|
|
return fLayerIssuer.issue();
|
|
}
|
|
|
|
/**
|
|
* Get the indirection path for a layered node.
|
|
* @param version The version to look under.
|
|
* @param path The path to the node.
|
|
* @return The indirection path.
|
|
*/
|
|
public String getIndirectionPath(int version, String path)
|
|
{
|
|
fLookupCount.set(1);
|
|
String [] pathParts = SplitPath(path);
|
|
AVMStore store = getAVMStoreByName(pathParts[0], false);
|
|
return store.getIndirectionPath(version, pathParts[1]);
|
|
}
|
|
|
|
/**
|
|
* Get the next version id for the given AVMStore.
|
|
* @param name The name of the AVMStore.
|
|
* @return The next version id.
|
|
*/
|
|
public int getLatestVersionID(String name)
|
|
{
|
|
AVMStore store = getAVMStoreByName(name, false);
|
|
return store.getNextVersionID();
|
|
}
|
|
|
|
/**
|
|
* Get an AVMStore by name.
|
|
* @param name The name of the AVMStore.
|
|
* @param write Whether this is called for a write operation.
|
|
* @return The AVMStore.
|
|
*/
|
|
private AVMStore getAVMStoreByName(String name, boolean write)
|
|
{
|
|
AVMStore store = AVMContext.fgInstance.fAVMStoreDAO.getByName(name);
|
|
if (store == null)
|
|
{
|
|
throw new AVMNotFoundException("AVMStore not found: " + name);
|
|
}
|
|
return store;
|
|
}
|
|
|
|
/**
|
|
* Get a descriptor for an AVMStore root.
|
|
* @param version The version to get.
|
|
* @param name The name of the AVMStore.
|
|
* @return The descriptor for the root.
|
|
*/
|
|
public AVMNodeDescriptor getAVMStoreRoot(int version, String name)
|
|
{
|
|
AVMStore store = getAVMStoreByName(name, false);
|
|
if (store == null)
|
|
{
|
|
throw new AVMNotFoundException("Not found: " + name);
|
|
}
|
|
return store.getRoot(version);
|
|
}
|
|
|
|
// TODO Fix this awful mess regarding cycle detection.
|
|
/**
|
|
* Lookup a node.
|
|
* @param version The version to look under.
|
|
* @param path The path to lookup.
|
|
* @return A lookup object.
|
|
*/
|
|
public Lookup lookup(int version, String path)
|
|
{
|
|
Integer count = fLookupCount.get();
|
|
if (count == null)
|
|
{
|
|
fLookupCount.set(1);
|
|
}
|
|
else
|
|
{
|
|
fLookupCount.set(count + 1);
|
|
}
|
|
if (fLookupCount.get() > 50)
|
|
{
|
|
throw new AVMCycleException("Cycle in lookup.");
|
|
}
|
|
String [] pathParts = SplitPath(path);
|
|
AVMStore store = getAVMStoreByName(pathParts[0], false);
|
|
Lookup result = store.lookup(version, pathParts[1], false);
|
|
if (count == null)
|
|
{
|
|
fLookupCount.set(null);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Lookup a descriptor from a directory descriptor.
|
|
* @param dir The directory descriptor.
|
|
* @param name The name of the child to lookup.
|
|
* @return The child's descriptor.
|
|
*/
|
|
public AVMNodeDescriptor lookup(AVMNodeDescriptor dir, String name)
|
|
{
|
|
fLookupCount.set(0);
|
|
AVMNode node = AVMContext.fgInstance.fAVMNodeDAO.getByID(dir.getId());
|
|
if (node == null)
|
|
{
|
|
throw new AVMNotFoundException("Not found: " + dir.getId());
|
|
}
|
|
if (node.getType() != AVMNodeType.LAYERED_DIRECTORY &&
|
|
node.getType() != AVMNodeType.PLAIN_DIRECTORY)
|
|
{
|
|
throw new AVMWrongTypeException("Not a directory.");
|
|
}
|
|
DirectoryNode dirNode = (DirectoryNode)node;
|
|
return dirNode.lookupChild(dir, name);
|
|
}
|
|
|
|
/**
|
|
* Get information about layering of a path.
|
|
* @param version The version to look under.
|
|
* @param path The full avm path.
|
|
* @return A LayeringDescriptor.
|
|
*/
|
|
public LayeringDescriptor getLayeringInfo(int version, String path)
|
|
{
|
|
fLookupCount.set(1);
|
|
String [] pathParts = SplitPath(path);
|
|
AVMStore store = getAVMStoreByName(pathParts[0], false);
|
|
Lookup lookup = store.lookup(version, pathParts[1], false);
|
|
return new LayeringDescriptor(!lookup.getDirectlyContained(),
|
|
lookup.getAVMStore().getDescriptor(),
|
|
lookup.getFinalStore().getDescriptor());
|
|
}
|
|
|
|
/**
|
|
* Lookup a directory specifically.
|
|
* @param version The version to look under.
|
|
* @param path The path to lookup.
|
|
* @return A lookup object.
|
|
*/
|
|
public Lookup lookupDirectory(int version, String path)
|
|
{
|
|
fLookupCount.set(fLookupCount.get() + 1);
|
|
if (fLookupCount.get() > 50)
|
|
{
|
|
throw new AVMCycleException("Cycle in lookup.");
|
|
}
|
|
String [] pathParts = SplitPath(path);
|
|
AVMStore store = getAVMStoreByName(pathParts[0], false);
|
|
return store.lookupDirectory(version, pathParts[1], false);
|
|
}
|
|
|
|
/**
|
|
* Utility to split a path, foo:bar/baz into its repository and path parts.
|
|
* @param path The fully qualified path.
|
|
* @return The repository name and the repository path.
|
|
*/
|
|
private String[] SplitPath(String path)
|
|
{
|
|
String [] pathParts = path.split(":");
|
|
if (pathParts.length != 2)
|
|
{
|
|
throw new AVMException("Invalid path: " + path);
|
|
}
|
|
return pathParts;
|
|
}
|
|
|
|
/**
|
|
* Get the path to file storage.
|
|
* @return The root path of file storage.
|
|
*/
|
|
public String getStorageRoot()
|
|
{
|
|
return fStorage;
|
|
}
|
|
|
|
/**
|
|
* Make a directory into a primary indirection.
|
|
* @param path The full path.
|
|
*/
|
|
public void makePrimary(String path)
|
|
{
|
|
fLookupCount.set(1);
|
|
String[] pathParts = SplitPath(path);
|
|
AVMStore store = getAVMStoreByName(pathParts[0], true);
|
|
store.makePrimary(pathParts[1]);
|
|
}
|
|
|
|
/**
|
|
* Change what a layered directory points at.
|
|
* @param path The full path to the layered directory.
|
|
* @param target The new target path.
|
|
*/
|
|
public void retargetLayeredDirectory(String path, String target)
|
|
{
|
|
fLookupCount.set(1);
|
|
String[] pathParts = SplitPath(path);
|
|
AVMStore store = getAVMStoreByName(pathParts[0], true);
|
|
store.retargetLayeredDirectory(pathParts[1], target);
|
|
}
|
|
|
|
/**
|
|
* Get the history chain for a node.
|
|
* @param desc The node to get history of.
|
|
* @param count The maximum number of ancestors to traverse. Negative means all.
|
|
* @return A List of ancestors.
|
|
*/
|
|
public List<AVMNodeDescriptor> getHistory(AVMNodeDescriptor desc, int count)
|
|
{
|
|
AVMNode node = AVMContext.fgInstance.fAVMNodeDAO.getByID(desc.getId());
|
|
if (node == null)
|
|
{
|
|
throw new AVMNotFoundException("Not found.");
|
|
}
|
|
if (count < 0)
|
|
{
|
|
count = Integer.MAX_VALUE;
|
|
}
|
|
List<AVMNodeDescriptor> history = new ArrayList<AVMNodeDescriptor>();
|
|
for (int i = 0; i < count; i++)
|
|
{
|
|
node = node.getAncestor();
|
|
if (node == null)
|
|
{
|
|
break;
|
|
}
|
|
history.add(node.getDescriptor("UNKNOWN", "UNKNOWN", "UNKNOWN"));
|
|
}
|
|
return history;
|
|
}
|
|
|
|
/**
|
|
* Set the opacity of a layered directory. An opaque directory hides
|
|
* the things it points to via indirection.
|
|
* @param path The path to the layered directory.
|
|
* @param opacity True is opaque; false is not.
|
|
*/
|
|
public void setOpacity(String path, boolean opacity)
|
|
{
|
|
fLookupCount.set(1);
|
|
String[] pathParts = SplitPath(path);
|
|
AVMStore store = getAVMStoreByName(pathParts[0], true);
|
|
store.setOpacity(pathParts[1], opacity);
|
|
}
|
|
|
|
/**
|
|
* Get the AVMStoreDescriptor for an AVMStore.
|
|
* @param name The name of the AVMStore.
|
|
* @return The descriptor.
|
|
*/
|
|
public AVMStoreDescriptor getAVMStoreDescriptor(String name)
|
|
{
|
|
return getAVMStoreByName(name, false).getDescriptor();
|
|
}
|
|
|
|
/**
|
|
* Get the common ancestor of two nodes if one exists. Unfortunately
|
|
* this is a quadratic problem, taking time proportional to the product
|
|
* of the lengths of the left and right history chains.
|
|
* @param left The first node.
|
|
* @param right The second node.
|
|
* @return The common ancestor. There are four possible results. Null means
|
|
* that there is no common ancestor. Left returned means that left is strictly
|
|
* an ancestor of right. Right returned means that right is strictly an
|
|
* ancestor of left. Any other non null return is the common ancestor and
|
|
* indicates that left and right are in conflict.
|
|
*/
|
|
public AVMNodeDescriptor getCommonAncestor(AVMNodeDescriptor left,
|
|
AVMNodeDescriptor right)
|
|
{
|
|
AVMNode lNode = AVMContext.fgInstance.fAVMNodeDAO.getByID(left.getId());
|
|
AVMNode rNode = AVMContext.fgInstance.fAVMNodeDAO.getByID(right.getId());
|
|
if (lNode == null || rNode == null)
|
|
{
|
|
throw new AVMNotFoundException("Node not found.");
|
|
}
|
|
List<AVMNode> leftHistory = new ArrayList<AVMNode>();
|
|
while (lNode != null)
|
|
{
|
|
leftHistory.add(lNode);
|
|
lNode = lNode.getAncestor();
|
|
}
|
|
List<AVMNode> rightHistory = new ArrayList<AVMNode>();
|
|
while (rNode != null)
|
|
{
|
|
rightHistory.add(rNode);
|
|
rNode = rNode.getAncestor();
|
|
}
|
|
for (AVMNode l : leftHistory)
|
|
{
|
|
for (AVMNode r : rightHistory)
|
|
{
|
|
if (l.equals(r))
|
|
{
|
|
return l.getDescriptor("", "", "");
|
|
}
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Get the single instance of AVMRepository.
|
|
* @return The single instance.
|
|
*/
|
|
public static AVMRepository GetInstance()
|
|
{
|
|
return fgInstance;
|
|
}
|
|
}
|