| /* |
| * Copyright 2005 The Apache Software Foundation. |
| * |
| * Licensed 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.apache.log4j.Logger; |
| import org.apache.jackrabbit.webdav.transaction.TransactionResource; |
| import org.apache.jackrabbit.webdav.transaction.TransactionDavServletRequest; |
| import org.apache.jackrabbit.webdav.observation.SubscriptionManager; |
| import org.apache.jackrabbit.webdav.observation.ObservationResource; |
| import org.apache.jackrabbit.webdav.version.DeltaVServletRequest; |
| import org.apache.jackrabbit.webdav.version.VersionControlledResource; |
| import org.apache.jackrabbit.webdav.jcr.version.VersionItemCollection; |
| import org.apache.jackrabbit.webdav.jcr.version.VersionHistoryItemCollection; |
| import org.apache.jackrabbit.webdav.jcr.transaction.TxLockManagerImpl; |
| import org.apache.jackrabbit.webdav.DavResourceFactory; |
| import org.apache.jackrabbit.webdav.DavResource; |
| import org.apache.jackrabbit.webdav.DavResourceLocator; |
| import org.apache.jackrabbit.webdav.DavServletRequest; |
| import org.apache.jackrabbit.webdav.DavServletResponse; |
| import org.apache.jackrabbit.webdav.DavException; |
| import org.apache.jackrabbit.webdav.DavSession; |
| import org.apache.jackrabbit.webdav.DavMethods; |
| |
| import javax.jcr.version.Version; |
| import javax.jcr.version.VersionHistory; |
| import javax.jcr.Item; |
| import javax.jcr.Node; |
| import javax.jcr.PathNotFoundException; |
| import javax.jcr.RepositoryException; |
| import javax.jcr.Session; |
| |
| /** |
| * <code>DavResourceFactoryImpl</code>... |
| */ |
| public class DavResourceFactoryImpl implements DavResourceFactory { |
| |
| private static Logger log = Logger.getLogger(DavResourceFactoryImpl.class); |
| |
| private final TxLockManagerImpl txMgr; |
| private final SubscriptionManager subsMgr; |
| |
| /** |
| * Create a new <code>DavResourceFactoryImpl</code>. |
| * |
| * @param txMgr |
| * @param subsMgr |
| */ |
| public DavResourceFactoryImpl(TxLockManagerImpl txMgr, SubscriptionManager subsMgr) { |
| this.txMgr = txMgr; |
| this.subsMgr = subsMgr; |
| } |
| |
| /** |
| * Create a new <code>DavResource</code> from the specified locator and request |
| * objects. Note, that in contrast to |
| * {@link #createResource(DavResourceLocator, DavSession)} the locator may |
| * point to a non-existing resource. |
| * <p/> |
| * If the request contains a {@link org.apache.jackrabbit.webdav.version.DeltaVServletRequest#getLabel() |
| * Label header}, the resource is build from the indicated |
| * {@link org.apache.jackrabbit.webdav.version.VersionResource version} instead. |
| * |
| * @param locator |
| * @param request |
| * @param response |
| * @return |
| * @see DavResourceFactory#createResource(org.apache.jackrabbit.webdav.DavResourceLocator, org.apache.jackrabbit.webdav.DavServletRequest, org.apache.jackrabbit.webdav.DavServletResponse) |
| */ |
| public DavResource createResource(DavResourceLocator locator, |
| DavServletRequest request, |
| DavServletResponse response) throws DavException { |
| |
| DavSession session = request.getDavSession(); |
| DavResource resource; |
| if (locator.isRootLocation()) { |
| resource = new RootCollection(locator, session, this); |
| } else { |
| try { |
| resource = createResourceForItem(locator, session); |
| |
| /* if the created resource is version-controlled and the request |
| contains a Label header, the corresponding Version must be used |
| instead.*/ |
| if (request instanceof DeltaVServletRequest && isVersionControlled(resource)) { |
| String labelHeader = ((DeltaVServletRequest)request).getLabel(); |
| if (labelHeader != null && DavMethods.isMethodAffectedByLabel(request)) { |
| Item item = getItem(session, locator); |
| Version v = ((Node)item).getVersionHistory().getVersionByLabel(labelHeader); |
| DavResourceLocator vloc = locator.getFactory().createResourceLocator(locator.getPrefix(), locator.getWorkspacePath(), v.getPath(), false); |
| resource = new VersionItemCollection(vloc, session, this, v); |
| } |
| } |
| } catch (PathNotFoundException e) { |
| /* item does not exist yet: create the default resources |
| Note: MKCOL request forces a collection-resource even if there already |
| exists a repository-property with the given path. the MKCOL will |
| in that particular case fail with a 405 (method not allowed).*/ |
| if (DavMethods.getMethodCode(request.getMethod()) == DavMethods.DAV_MKCOL) { |
| resource = new VersionControlledItemCollection(locator, session, this, null); |
| } else { |
| resource = new DefaultItemResource(locator, session, this, null); |
| } |
| } catch (RepositoryException e) { |
| log.error("Failed to build resource from item '"+ locator.getResourcePath() + "'"); |
| throw new JcrDavException(e); |
| } |
| } |
| |
| ((TransactionResource)resource).init(txMgr, ((TransactionDavServletRequest)request).getTransactionId()); |
| ((ObservationResource)resource).init(subsMgr); |
| return resource; |
| } |
| |
| /** |
| * Create a new <code>DavResource</code> from the given locator and session. |
| * |
| * @param locator |
| * @param session |
| * @return DavResource representing either a repository item or the {@link RootCollection}. |
| * @throws DavException if the given locator does neither refer to a repository item |
| * nor does represent the {@link org.apache.jackrabbit.webdav.DavResourceLocator#isRootLocation() |
| * root location}. |
| */ |
| public DavResource createResource(DavResourceLocator locator, DavSession session) throws DavException { |
| DavResource resource; |
| try { |
| resource = createResourceForItem(locator, session); |
| } catch (RepositoryException e) { |
| log.info("Creating resource for non-existing repository item ..."); |
| if (locator.isRootLocation()) { |
| resource = new RootCollection(locator, session, this); |
| } else { |
| // todo: is this correct? |
| resource = new VersionControlledItemCollection(locator, session, this, null); |
| } |
| } |
| |
| // todo: currently transactionId is set manually after creation > to be improved. |
| resource.addLockManager(txMgr); |
| ((ObservationResource)resource).init(subsMgr); |
| return resource; |
| } |
| |
| /** |
| * Tries to retrieve the repository item defined by the locator's resource |
| * path and build the corresponding WebDAV resource. The following distinction |
| * is made between items: Version nodes, VersionHistory nodes, root node, |
| * unspecified nodes and finally property items. |
| * |
| * @param locator |
| * @param session |
| * @return DavResource representing a repository item. |
| * @throws RepositoryException if {@link javax.jcr.Session#getItem(String)} fails. |
| */ |
| private DavResource createResourceForItem(DavResourceLocator locator, DavSession session) throws RepositoryException { |
| DavResource resource; |
| Item item = getItem(session, locator); |
| if (item.isNode()) { |
| // create special resources for Version and VersionHistory |
| if (item instanceof Version) { |
| resource = new VersionItemCollection(locator, session, this, item); |
| } else if (item instanceof VersionHistory) { |
| resource = new VersionHistoryItemCollection(locator, session, this, item); |
| } else if (ItemResourceConstants.ROOT_ITEM_PATH.equals(item.getPath())) { |
| resource = new RootItemCollection(locator, session, this, item); |
| } else{ |
| resource = new VersionControlledItemCollection(locator, session, this, item); |
| } |
| } else { |
| resource = new DefaultItemResource(locator, session, this, item); |
| } |
| return resource; |
| } |
| |
| private Item getItem(DavSession davSession, DavResourceLocator locator) throws PathNotFoundException, RepositoryException { |
| Session s = davSession.getRepositorySession(); |
| return s.getItem(locator.getJcrPath()); |
| } |
| |
| /** |
| * Returns true, if the specified resource is a {@link VersionControlledResource} |
| * and has a version history. |
| * |
| * @param resource |
| * @return true if the specified resource is version-controlled. |
| */ |
| private boolean isVersionControlled(DavResource resource) { |
| boolean vc = false; |
| if (resource instanceof VersionControlledResource) { |
| try { |
| vc = ((VersionControlledResource)resource).getVersionHistory() != null; |
| } catch (DavException e) { |
| log.debug("Resource '" + resource.getHref() + "' is not version-controlled."); |
| } |
| } |
| return vc; |
| } |
| } |