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WebDAV server implementations for JCR
/*
* 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.webdav.jcr.version;
import org.apache.jackrabbit.JcrConstants;
import org.apache.jackrabbit.webdav.DavException;
import org.apache.jackrabbit.webdav.DavResourceFactory;
import org.apache.jackrabbit.webdav.DavResourceLocator;
import org.apache.jackrabbit.webdav.DavServletResponse;
import org.apache.jackrabbit.webdav.jcr.property.JcrDavPropertyNameSet;
import org.apache.jackrabbit.webdav.property.DavProperty;
import org.apache.jackrabbit.webdav.util.HttpDateFormat;
import org.apache.jackrabbit.webdav.jcr.DefaultItemCollection;
import org.apache.jackrabbit.webdav.jcr.ItemResourceConstants;
import org.apache.jackrabbit.webdav.jcr.JcrDavException;
import org.apache.jackrabbit.webdav.jcr.JcrDavSession;
import org.apache.jackrabbit.webdav.property.DavPropertyName;
import org.apache.jackrabbit.webdav.property.DefaultDavProperty;
import org.apache.jackrabbit.webdav.property.HrefProperty;
import org.apache.jackrabbit.webdav.version.LabelInfo;
import org.apache.jackrabbit.webdav.version.LabelSetProperty;
import org.apache.jackrabbit.webdav.version.VersionHistoryResource;
import org.apache.jackrabbit.webdav.version.VersionResource;
import org.apache.jackrabbit.webdav.version.report.ReportType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.jcr.Item;
import javax.jcr.Node;
import javax.jcr.Property;
import javax.jcr.PropertyIterator;
import javax.jcr.RepositoryException;
import javax.jcr.version.Version;
import javax.jcr.version.VersionHistory;
import java.util.ArrayList;
import java.util.List;
/**
* VersionItemCollection represents a JCR version.
*
* @see Version
*/
public class VersionItemCollection extends DefaultItemCollection
implements VersionResource {
private static Logger log = LoggerFactory.getLogger(VersionItemCollection.class);
/**
* Create a new VersionItemCollection.
*
* @param locator
* @param session
* @param factory
*/
public VersionItemCollection(DavResourceLocator locator,
JcrDavSession session,
DavResourceFactory factory, Item item) {
super(locator, session, factory, item);
if (item == null || !(item instanceof Version)) {
throw new IllegalArgumentException("Version item expected.");
}
}
@Override
public DavProperty getProperty(DavPropertyName name) {
DavProperty prop = super.getProperty(name);
if (prop == null && exists()) {
Version v = (Version) item;
try {
if (VERSION_NAME.equals(name)) {
// required, protected DAV:version-name property
prop = new DefaultDavProperty(VERSION_NAME, v.getName(), true);
} else if (VERSION_HISTORY.equals(name)) {
// required DAV:version-history (computed) property
String vhHref = getLocatorFromItem(getVersionHistoryItem()).getHref(true);
prop = new HrefProperty(VERSION_HISTORY, vhHref, true);
} else if (PREDECESSOR_SET.equals(name)) {
// required DAV:predecessor-set (protected) property
prop = getHrefProperty(VersionResource.PREDECESSOR_SET, v.getPredecessors(), true);
} else if (SUCCESSOR_SET.equals(name)) {
// required DAV:successor-set (computed) property
prop = getHrefProperty(SUCCESSOR_SET, v.getSuccessors(), true);
} else if (LABEL_NAME_SET.equals(name)) {
// required, protected DAV:label-name-set property
String[] labels = getVersionHistoryItem().getVersionLabels(v);
prop = new LabelSetProperty(labels);
} else if (CHECKOUT_SET.equals(name)) {
// required DAV:checkout-set (computed) property
PropertyIterator it = v.getReferences();
List nodeList = new ArrayList();
while (it.hasNext()) {
Property p = it.nextProperty();
if (JcrConstants.JCR_BASEVERSION.equals(p.getName())) {
Node n = p.getParent();
if (n.isCheckedOut()) {
nodeList.add(n);
}
}
}
prop = getHrefProperty(CHECKOUT_SET, nodeList.toArray(new Node[nodeList.size()]), true);
}
} catch (RepositoryException e) {
log.error(e.getMessage());
}
}
return prop;
}
//----------------------------------------------< DavResource interface >---
/**
* @see org.apache.jackrabbit.webdav.DavResource#getSupportedMethods()
*/
@Override
public String getSupportedMethods() {
StringBuffer sb = new StringBuffer(ItemResourceConstants.METHODS);
sb.append(", ").append(VersionResource.METHODS);
return sb.toString();
}
//------------------------------------------< VersionResource interface >---
/**
* Modify the labels defined for the underlying repository version.
*
* @param labelInfo
* @throws org.apache.jackrabbit.webdav.DavException
* @see VersionResource#label(org.apache.jackrabbit.webdav.version.LabelInfo)
* @see VersionHistory#addVersionLabel(String, String, boolean)
* @see VersionHistory#removeVersionLabel(String)
*/
public void label(LabelInfo labelInfo) throws DavException {
if (labelInfo == null) {
throw new DavException(DavServletResponse.SC_BAD_REQUEST, "Valid label request body required.");
}
if (!exists()) {
throw new DavException(DavServletResponse.SC_NOT_FOUND);
}
try {
VersionHistory vh = getVersionHistoryItem();
if (labelInfo.getType() == LabelInfo.TYPE_REMOVE) {
vh.removeVersionLabel(labelInfo.getLabelName());
} else if (labelInfo.getType() == LabelInfo.TYPE_ADD) {
// ADD: only add if not yet existing
vh.addVersionLabel(item.getName(), labelInfo.getLabelName(), false);
} else {
// SET: move label if already existing
vh.addVersionLabel(item.getName(), labelInfo.getLabelName(), true);
}
} catch (RepositoryException e) {
throw new JcrDavException(e);
}
}
/**
* Returns the {@link VersionHistory} associated with the repository version.
* Note: in contrast to a versionable node, the version history of a version
* item is always represented by its nearest ancestor.
*
* @return the {@link VersionHistoryResource} associated with this resource.
* @throws org.apache.jackrabbit.webdav.DavException
* @see org.apache.jackrabbit.webdav.version.VersionResource#getVersionHistory()
* @see javax.jcr.Item#getParent()
*/
public VersionHistoryResource getVersionHistory() throws DavException {
if (!exists()) {
throw new DavException(DavServletResponse.SC_NOT_FOUND);
}
try {
VersionHistory vh = getVersionHistoryItem();
DavResourceLocator loc = getLocatorFromItem(vh);
return (VersionHistoryResource) createResourceFromLocator(loc);
} catch (RepositoryException e) {
throw new JcrDavException(e);
}
}
/**
* Return versionhistory that contains this version item
*
* @return versionhistory that contains this version item
* @throws RepositoryException
* @see javax.jcr.version.Version#getContainingHistory()
*/
private VersionHistory getVersionHistoryItem() throws RepositoryException {
return ((Version)item).getContainingHistory();
}
//--------------------------------------------------------------------------
/**
* Define the set of reports supported by this resource.
*
* @see org.apache.jackrabbit.webdav.version.report.SupportedReportSetProperty
*/
@Override
protected void initSupportedReports() {
super.initSupportedReports();
if (exists()) {
supportedReports.addReportType(ReportType.VERSION_TREE);
}
}
@Override
protected void initPropertyNames() {
super.initPropertyNames();
if (exists()) {
names.addAll(JcrDavPropertyNameSet.VERSION_SET);
}
}
@Override
protected String getCreationDate() {
if (exists()) {
Version v = (Version) item;
try {
return HttpDateFormat.creationDateFormat().format(v.getCreated().getTime());
} catch (RepositoryException e) {
log.error(e.getMessage());
}
}
// fallback
return super.getCreationDate();
}
}