workspaceresourceimpl.java

jsr170接口的java实现。是个apache的开源项目。

/*
 * 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;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.jackrabbit.webdav.version.WorkspaceResource;
import org.apache.jackrabbit.webdav.version.DeltaVResource;
import org.apache.jackrabbit.webdav.version.UpdateInfo;
import org.apache.jackrabbit.webdav.version.VersionControlledResource;
import org.apache.jackrabbit.webdav.version.MergeInfo;
import org.apache.jackrabbit.webdav.version.LabelInfo;
import org.apache.jackrabbit.webdav.version.VersionHistoryResource;
import org.apache.jackrabbit.webdav.DavResource;
import org.apache.jackrabbit.webdav.DavException;
import org.apache.jackrabbit.webdav.DavResourceIterator;
import org.apache.jackrabbit.webdav.DavResourceLocator;
import org.apache.jackrabbit.webdav.MultiStatusResponse;
import org.apache.jackrabbit.webdav.DavServletResponse;
import org.apache.jackrabbit.webdav.DavResourceIteratorImpl;
import org.apache.jackrabbit.webdav.DavResourceFactory;
import org.apache.jackrabbit.webdav.MultiStatus;
import org.apache.jackrabbit.webdav.DavMethods;
import org.apache.jackrabbit.webdav.xml.DomUtil;
import org.apache.jackrabbit.webdav.search.SearchResource;
import org.apache.jackrabbit.webdav.jcr.property.NamespacesProperty;
import org.apache.jackrabbit.webdav.jcr.version.report.JcrPrivilegeReport;
import org.apache.jackrabbit.webdav.property.DavProperty;
import org.apache.jackrabbit.webdav.io.InputContext;
import org.apache.jackrabbit.webdav.io.OutputContext;
import org.w3c.dom.Element;

import javax.jcr.NamespaceRegistry;
import javax.jcr.RepositoryException;
import javax.jcr.Workspace;
import javax.jcr.Item;
import javax.jcr.Session;
import javax.jcr.version.Version;
import javax.jcr.observation.EventListener;
import java.util.Iterator;
import java.util.List;
import java.util.ArrayList;
import java.util.Date;
import java.util.Map;
import java.util.HashMap;
import java.io.IOException;

/**
 * <code>WorkspaceResourceImpl</code>...
 */
public class WorkspaceResourceImpl extends AbstractResource
    implements WorkspaceResource, VersionControlledResource {

    private static Logger log = LoggerFactory.getLogger(WorkspaceResourceImpl.class);

    /**
     * Create a new <code>WorkspaceResourceImpl</code>
     *
     * @param locator
     * @param session
     */
    WorkspaceResourceImpl(DavResourceLocator locator, JcrDavSession session, DavResourceFactory factory) {
        super(locator, session, factory);

        // initialize the supported locks and reports
        initLockSupport();
        initSupportedReports();
    }

    //--------------------------------------------------------< DavResource >---

    public String getSupportedMethods() {
        StringBuffer sb = new StringBuffer(DavResource.METHODS);
        sb.append(", ");
        sb.append(DeltaVResource.METHODS_INCL_MKWORKSPACE);
        sb.append(", ");
        sb.append(SearchResource.METHODS);
        // from vc-resource methods only UPDATE is supported
        sb.append(", ");
        sb.append(DavMethods.METHOD_UPDATE);
        return sb.toString();
    }

    /**
     * @return true
     */
    public boolean exists() {
        return true;
    }

    /**
     * @return true
     */
    public boolean isCollection() {
        return true;
    }

    /**
     * Returns the name of the workspace.
     *
     * @return The workspace name
     * @see org.apache.jackrabbit.webdav.DavResource#getDisplayName()
     * @see javax.jcr.Workspace#getName()
     */
    public String getDisplayName() {
        return getLocator().getWorkspaceName();
    }

    /**
     * Always returns 'now'
     *
     * @return
     */
    public long getModificationTime() {
        return new Date().getTime();
    }

    /**
     * Sets content lengths to '0' and retrieves the modification time.
     *
     * @param outputContext
     * @throws IOException
     */
    public void spool(OutputContext outputContext) throws IOException {
        outputContext.setContentLength(0);
        outputContext.setModificationTime(getModificationTime());
    }

    /**
     * Retrieve the collection that has all workspace collections
     * as internal members.
     *
     * @see org.apache.jackrabbit.webdav.DavResource#getCollection()
     */
    public DavResource getCollection() {
        DavResource collection = null;
        // create location with 'null' values for workspace-path and resource-path
        DavResourceLocator parentLoc = getLocator().getFactory().createResourceLocator(getLocator().getPrefix(), null, null);
        try {
            collection = createResourceFromLocator(parentLoc);
        } catch (DavException e) {
            log.error("Unexpected error while retrieving collection: " + e.getMessage());
        }
        return collection;
    }

    /**
     * Throws 403 exception (Forbidden)
     *
     * @param resource
     * @param inputContext
     * @throws DavException
     */
    public void addMember(DavResource resource, InputContext inputContext) throws DavException {
        log.error("Cannot add a new member to the workspace resource.");
        throw new DavException(DavServletResponse.SC_FORBIDDEN);
    }

    /**
     * Returns the resource representing the JCR root node.
     *
     * @return
     */
    public DavResourceIterator getMembers() {
        List l = new ArrayList();
        try {
            DavResourceLocator loc = getLocatorFromItem(getRepositorySession().getRootNode());
            l.add(createResourceFromLocator(loc));
        } catch (DavException e) {
            log.error("Internal error while building resource for the root node.", e);
        } catch (RepositoryException e) {
            log.error("Internal error while building resource for the root node.", e);
        }
        return new DavResourceIteratorImpl(l);
    }

    /**
     * Throws 403 exception (Forbidden)
     *
     * @param member
     * @throws DavException
     */
    public void removeMember(DavResource member) throws DavException {
        log.error("Cannot add a remove the root node.");
        throw new DavException(DavServletResponse.SC_FORBIDDEN);
    }

    /**
     * Allows to alter the registered namespaces ({@link ItemResourceConstants#JCR_NAMESPACES}) and
     * forwards any other property to the super class.<p/>
     * Note that again no property status is set. Any failure while setting
     * a property results in an exception (violating RFC 2518).
     *
     * @param property
     * @throws DavException