/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jackrabbit.jcr2spi.version;
import java.util.Calendar;
import javax.jcr.Item;
import javax.jcr.Node;
import javax.jcr.RepositoryException;
import javax.jcr.UnsupportedRepositoryOperationException;
import javax.jcr.Value;
import javax.jcr.nodetype.ConstraintViolationException;
import javax.jcr.version.Version;
import javax.jcr.version.VersionHistory;
import javax.jcr.version.VersionIterator;
import org.apache.jackrabbit.jcr2spi.ItemLifeCycleListener;
import org.apache.jackrabbit.jcr2spi.NodeImpl;
import org.apache.jackrabbit.jcr2spi.SessionImpl;
import org.apache.jackrabbit.jcr2spi.state.NodeState;
import org.apache.jackrabbit.spi.Name;
import org.apache.jackrabbit.spi.commons.name.NameConstants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* <code>VersionImpl</code>...
*/
public class VersionImpl extends NodeImpl implements Version {
private static Logger log = LoggerFactory.getLogger(VersionImpl.class);
public VersionImpl(SessionImpl session, NodeState state,
ItemLifeCycleListener[] listeners) {
super(session, state, listeners);
}
//------------------------------------------------------------< Version >---
/**
* @see Version#getContainingHistory()
*/
public VersionHistory getContainingHistory() throws RepositoryException {
return (VersionHistory) getParent();
}
/**
* @see Version#getCreated()
*/
public Calendar getCreated() throws RepositoryException {
return getProperty(NameConstants.JCR_CREATED).getDate();
}
/**
* @see Version#getSuccessors()
*/
public Version[] getSuccessors() throws RepositoryException {
return getVersions(NameConstants.JCR_SUCCESSORS);
}
/**
* @see Version#getLinearSuccessor()
*/
public Version getLinearSuccessor() throws RepositoryException {
// TODO: improve.
VersionHistory vh = getContainingHistory();
for (VersionIterator it = vh.getAllLinearVersions(); it.hasNext();) {
Version v = it.nextVersion();
if (isSame(v.getLinearPredecessor())) {
return v;
}
}
// no linear successor found
return null;
}
/**
* @see Version#getPredecessors()
*/
public Version[] getPredecessors() throws RepositoryException {
return getVersions(NameConstants.JCR_PREDECESSORS);
}
/**
* @see Version#getLinearPredecessor()
*/
public Version getLinearPredecessor() throws RepositoryException {
Value[] values = getProperty(NameConstants.JCR_PREDECESSORS).getValues();
if (values != null && values.length > 0) {
Node n = session.getNodeByUUID(values[0].getString());
if (n instanceof Version) {
return (Version) n;
} else {
throw new RepositoryException("Version property contains invalid value not pointing to a 'Version'");
}
} else {
return null;
}
}
/**
* @see Version#getFrozenNode()
*/
public Node getFrozenNode() throws RepositoryException {
return getNode(NameConstants.JCR_FROZENNODE, 1);
}
//---------------------------------------------------------------< Item >---
/**
*
* @param otherItem
* @return
* @see Item#isSame(Item)
*/
@Override
public boolean isSame(Item otherItem) throws RepositoryException {
checkStatus();
if (otherItem instanceof VersionImpl) {
// since all versions are referenceable, protected and live
// in the same workspace, a simple comparison of the UUIDs is sufficient
VersionImpl other = ((VersionImpl) otherItem);
try {
return getUUID().equals(other.getUUID());
} catch (RepositoryException e) {
// should never occur
log.error("Internal error while retrieving UUID of version.", e);
}
}
return false;
}
//-----------------------------------------------------------< ItemImpl >---
/**
* Always throws ConstraintViolationException since the version storage is
* protected.
*
* @throws UnsupportedRepositoryOperationException
* @throws ConstraintViolationException
* @throws RepositoryException
*/
@Override
protected void checkIsWritable() throws UnsupportedRepositoryOperationException, ConstraintViolationException, RepositoryException {
super.checkIsWritable();
throw new ConstraintViolationException("Version is protected");
}
/**
* Always returns false
*
* @throws RepositoryException
* @see NodeImpl#isWritable()
*/
@Override
protected boolean isWritable() throws RepositoryException {
super.isWritable();
return false;
}
//------------------------------------------------------------< private >---
/**
*
* @param propertyName
* @return
*/
private Version[] getVersions(Name propertyName) throws RepositoryException {
Version[] versions;
Value[] values = getProperty(propertyName).getValues();
if (values != null) {
versions = new Version[values.length];
for (int i = 0; i < values.length; i++) {
Node n = session.getNodeByUUID(values[i].getString());
if (n instanceof Version) {
versions[i] = (Version) n;
} else {
throw new RepositoryException("Version property contains invalid value not pointing to a 'Version'");
}
}
} else {
versions = new Version[0];
}
return versions;
}
}