| /* |
| * 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.version.report; |
| |
| import org.apache.jackrabbit.webdav.DavException; |
| import org.apache.jackrabbit.webdav.DavResource; |
| import org.apache.jackrabbit.webdav.DavResourceIterator; |
| import org.apache.jackrabbit.webdav.DavServletResponse; |
| import org.apache.jackrabbit.webdav.MultiStatus; |
| import org.apache.jackrabbit.webdav.MultiStatusResponse; |
| import org.apache.jackrabbit.webdav.property.AbstractDavProperty; |
| import org.apache.jackrabbit.webdav.property.DavProperty; |
| import org.apache.jackrabbit.webdav.property.DavPropertyName; |
| import org.apache.jackrabbit.webdav.property.HrefProperty; |
| import org.apache.jackrabbit.webdav.version.DeltaVConstants; |
| import org.apache.jackrabbit.webdav.version.DeltaVResource; |
| import org.apache.jackrabbit.webdav.xml.DomUtil; |
| import org.apache.jackrabbit.webdav.xml.Namespace; |
| import org.apache.jackrabbit.webdav.xml.ElementIterator; |
| import org.apache.log4j.Logger; |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Element; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Iterator; |
| |
| /** |
| * <code>ExpandPropertyReport</code> encapsulates the DAV:expand-property report, |
| * that provides a mechanism for retrieving in one request the properties from |
| * the resources identified by those DAV:href elements. It should be supported by |
| * all resources that support the REPORT method. |
| * <p/> |
| * RFC 3253 specifies the following required format for the request body: |
| * <pre> |
| * <!ELEMENT expand-property (property*)> |
| * <!ELEMENT property (property*)> |
| * <!ATTLIST property name NMTOKEN #REQUIRED> |
| * name value: a property element type |
| * <!ATTLIST property namespace NMTOKEN "DAV:"> |
| * namespace value: an XML namespace |
| * </pre> |
| * NOTE: any DAV:property elements defined in the request body, that does not |
| * represent {@link HrefProperty} is treated as in a common PROPFIND request. |
| * |
| * @see DeltaVConstants#XML_EXPAND_PROPERTY |
| * @see DeltaVConstants#XML_PROPERTY |
| */ |
| public class ExpandPropertyReport implements Report, DeltaVConstants { |
| |
| private static Logger log = Logger.getLogger(ExpandPropertyReport.class); |
| |
| private DeltaVResource resource; |
| private ReportInfo info; |
| private Iterator propertyElements; |
| |
| /** |
| * Returns {@link ReportType#EXPAND_PROPERTY}. |
| * |
| * @return |
| * @see Report#getType() |
| */ |
| public ReportType getType() { |
| return ReportType.EXPAND_PROPERTY; |
| } |
| |
| /** |
| * Always returns <code>true</code>. |
| * |
| * @return true |
| * @see org.apache.jackrabbit.webdav.version.report.Report#isMultiStatusReport() |
| */ |
| public boolean isMultiStatusReport() { |
| return true; |
| } |
| |
| /** |
| * @see Report#init(org.apache.jackrabbit.webdav.version.DeltaVResource, ReportInfo) |
| */ |
| public void init(DeltaVResource resource, ReportInfo info) throws DavException { |
| setResource(resource); |
| setInfo(info); |
| } |
| |
| /** |
| * Set the target resource. |
| * |
| * @param resource |
| * @throws DavException if the specified resource is <code>null</code> |
| */ |
| private void setResource(DeltaVResource resource) throws DavException { |
| if (resource == null) { |
| throw new DavException(DavServletResponse.SC_BAD_REQUEST, "The resource specified must not be null."); |
| } |
| this.resource = resource; |
| } |
| |
| /** |
| * Set the <code>ReportInfo</code>. |
| * |
| * @param info |
| * @throws DavException if the given <code>ReportInfo</code> |
| * does not contain a DAV:expand-property element. |
| */ |
| private void setInfo(ReportInfo info) throws DavException { |
| if (!getType().isRequestedReportType(info)) { |
| throw new DavException(DavServletResponse.SC_BAD_REQUEST, "DAV:expand-property element expected."); |
| } |
| this.info = info; |
| propertyElements = info.getContentElements(XML_PROPERTY, NAMESPACE).iterator(); |
| } |
| |
| /** |
| * Run the report |
| * |
| * @return Xml <code>Document</code> as defined by |
| * <a href="http://www.ietf.org/rfc/rfc2518.txt">RFC 2518</a> |
| * @see org.apache.jackrabbit.webdav.xml.XmlSerializable#toXml(Document) |
| * @param document |
| */ |
| public Element toXml(Document document) { |
| return getMultiStatus().toXml(document); |
| } |
| |
| /** |
| * Retrieve the multistatus object that is returned in response to the |
| * expand-property report request. |
| * |
| * @return |
| * @throws NullPointerException if info and resource have not been set. |
| */ |
| private MultiStatus getMultiStatus() { |
| if (info == null || resource == null) { |
| throw new NullPointerException("Error while running DAV:version-tree report"); |
| } |
| |
| MultiStatus ms = new MultiStatus(); |
| addResponses(resource, info.getDepth(), ms); |
| return ms; |
| } |
| |
| /** |
| * Fills the specified <code>MultiStatus</code> object by generating a |
| * <code>MultiStatusResponse</code> for the given resource (and |
| * its member according to the depth value). |
| * |
| * @param res |
| * @param depth |
| * @param ms |
| * @see #getResponse(DavResource, Iterator) |
| */ |
| private void addResponses(DavResource res, int depth, MultiStatus ms) { |
| MultiStatusResponse response = getResponse(res, propertyElements); |
| ms.addResponse(response); |
| if (depth > 0) { |
| DavResourceIterator it = res.getMembers(); |
| while (it.hasNext()) { |
| addResponses(it.nextResource(), depth-1, ms); |
| } |
| } |
| } |
| |
| /** |
| * Builds a <code>MultiStatusResponse</code> for the given resource respecting |
| * the properties specified. Any property that represents a {@link HrefProperty} |
| * is expanded: It's name equals the name of a valid {@link HrefProperty}. |
| * However the value of that given property (consisting of one or multiple DAV:href elements) |
| * is replaced by the Xml representation of a separate |
| * {@link MultiStatusResponse multistatus responses} for the |
| * resource referenced by the given DAV:href elements. The responses may |
| * themselves have properties, which are defined by the separate list. |
| * |
| * @param res |
| * @param propertyElements |
| * @return <code>MultiStatusResponse</code> for the given resource. |
| * @see ExpandProperty |
| */ |
| private MultiStatusResponse getResponse(DavResource res, Iterator propertyElements) { |
| MultiStatusResponse resp = new MultiStatusResponse(res.getHref(), null); |
| while (propertyElements.hasNext()) { |
| Element propertyElem = (Element)propertyElements.next(); |
| // retrieve the localName present in the "name" attribute |
| String nameAttr = propertyElem.getAttribute(ATTR_NAME); |
| if (nameAttr == null || "".equals(nameAttr)) { |
| // NOTE: this is not valid according to the DTD |
| continue; |
| } |
| // retrieve the namespace present in the "namespace" attribute |
| // NOTE: if this attribute is missing the DAV: namespace represents the default. |
| String namespaceAttr = propertyElem.getAttribute(ATTR_NAMESPACE); |
| Namespace namespace = (namespaceAttr != null) ? Namespace.getNamespace(namespaceAttr) : NAMESPACE; |
| |
| DavPropertyName propName = DavPropertyName.create(nameAttr, namespace); |
| DavProperty p = res.getProperty(propName); |
| if (p != null) { |
| if (p instanceof HrefProperty && res instanceof DeltaVResource) { |
| ElementIterator it = DomUtil.getChildren(propertyElem, XML_PROPERTY, NAMESPACE); |
| resp.add(new ExpandProperty((DeltaVResource)res, (HrefProperty)p, it)); |
| } else { |
| resp.add(p); |
| } |
| } else { |
| resp.add(propName, DavServletResponse.SC_NOT_FOUND); |
| } |
| } |
| return resp; |
| } |
| |
| //--------------------------------------------------------< inner class >--- |
| /** |
| * <code>ExpandProperty</code> extends <code>DavProperty</code>. It's name |
| * equals the name of a valid {@link HrefProperty}. However the value of |
| * that given property (consisting of one or multiple DAV:href elements) |
| * is replaced by the Xml representation of a separate |
| * {@link MultiStatusResponse multistatus responses} for the |
| * resource referenced to by the given DAV.:href elements. The responses may |
| * themselves have properties, which are defined by the separate list. |
| */ |
| private class ExpandProperty extends AbstractDavProperty { |
| |
| private List valueList = new ArrayList(); |
| |
| /** |
| * Create a new <code>ExpandProperty</code>. |
| * |
| * @param hrefProperty |
| * @param elementIter |
| */ |
| private ExpandProperty(DeltaVResource deltaVResource, HrefProperty hrefProperty, ElementIterator elementIter) { |
| super(hrefProperty.getName(), hrefProperty.isProtected()); |
| try { |
| DavResource[] refResource = deltaVResource.getReferenceResources(hrefProperty.getName()); |
| for (int i = 0; i < refResource.length; i++) { |
| MultiStatusResponse resp = getResponse(refResource[i], elementIter); |
| valueList.add(resp); |
| } |
| } catch (DavException e) { |
| // invalid references or unknown property |
| log.error(e.getMessage()); |
| } |
| } |
| |
| /** |
| * Returns a List of {@link MultiStatusResponse} objects. |
| * |
| * @return |
| */ |
| public Object getValue() { |
| return valueList; |
| } |
| } |
| } |