org.apache.jackrabbit.webdav.MultiStatusResponse Maven / Gradle / Ivy
/*
* 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;
import org.apache.jackrabbit.webdav.property.DavProperty;
import org.apache.jackrabbit.webdav.property.DavPropertyName;
import org.apache.jackrabbit.webdav.property.DavPropertyNameSet;
import org.apache.jackrabbit.webdav.property.DavPropertySet;
import org.apache.jackrabbit.webdav.property.DefaultDavProperty;
import org.apache.jackrabbit.webdav.property.PropContainer;
import org.apache.jackrabbit.webdav.xml.DomUtil;
import org.apache.jackrabbit.webdav.xml.ElementIterator;
import org.apache.jackrabbit.webdav.xml.XmlSerializable;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
/**
* MultiStatusResponse represents the DAV:multistatus element defined
* by RFC 2518:
*
* <!ELEMENT response (href, ((href*, status)|(propstat+)), responsedescription?) >
* <!ELEMENT status (#PCDATA) >
* <!ELEMENT propstat (prop, status, responsedescription?) >
* <!ELEMENT responsedescription (#PCDATA) >
* <!ELEMENT prop ANY >
*
*/
public class MultiStatusResponse implements XmlSerializable, DavConstants {
private static final int TYPE_PROPSTAT = 0;
private static final int TYPE_HREFSTATUS = 1;
/**
* The type of MultiStatusResponse
*/
private final int type;
/**
* The content the 'href' element for this response
*/
private final String href;
/**
* An optional response description.
*/
private final String responseDescription;
/**
* Type of MultiStatus response: Href + Status
*/
private Status status;
/**
* Type of MultiStatus response: PropStat Hashmap containing all status
*/
private HashMap statusMap = new HashMap();
private MultiStatusResponse(String href, String responseDescription, int type) {
if (!isValidHref(href)) {
throw new IllegalArgumentException("Invalid href ('" + href + "')");
}
this.href = href;
this.responseDescription = responseDescription;
this.type = type;
}
/**
* Constructs an WebDAV multistatus response
*
* @param href
* @param status
* @param responseDescription
*/
public MultiStatusResponse(String href, Status status, String responseDescription) {
this(href, responseDescription, TYPE_HREFSTATUS);
if (status == null) {
throw new IllegalArgumentException("Status must not be null in case of a multistatus reponse that consists of href + status only.");
}
this.status = status;
}
/**
* Constructs an WebDAV multistatus response for a given resource. This
* would be used by COPY, MOVE, DELETE, LOCK that require a multistatus in
* case of error with a resource other than the resource identified in the
* Request-URI.
* The response description is set to null.
*
* @param href
* @param statusCode
*/
public MultiStatusResponse(String href, int statusCode) {
this(href, statusCode, null);
}
/**
* Constructs an WebDAV multistatus response for a given resource. This
* would be used by COPY, MOVE, DELETE, LOCK that require a multistatus in
* case of error with a resource other than the resource identified in the
* Request-URI.
*
* @param href
* @param statusCode
* @param responseDescription
*/
public MultiStatusResponse(String href, int statusCode, String responseDescription) {
this(href, new Status(statusCode), responseDescription);
}
/**
* Constructs an empty WebDAV multistatus response of type 'PropStat'
*/
public MultiStatusResponse(String href, String responseDescription) {
this(href, responseDescription, TYPE_PROPSTAT);
}
/**
* Constructs a WebDAV multistatus response and retrieves the resource
* properties according to the given DavPropertyNameSet.
*
* @param resource
* @param propNameSet
*/
public MultiStatusResponse(DavResource resource, DavPropertyNameSet propNameSet) {
this(resource, propNameSet, PROPFIND_BY_PROPERTY);
}
/**
* Constructs a WebDAV multistatus response and retrieves the resource
* properties according to the given DavPropertyNameSet. It
* adds all known property to the '200' set, while unknown properties are
* added to the '404' set.
*
* Note, that the set of property names is ignored in case of a {@link
* #PROPFIND_ALL_PROP} and {@link #PROPFIND_PROPERTY_NAMES} propFindType.
*
* @param resource The resource to retrieve the property from
* @param propNameSet The property name set as obtained from the request
* body.
* @param propFindType any of the following values: {@link
* #PROPFIND_ALL_PROP}, {@link #PROPFIND_BY_PROPERTY}, {@link
* #PROPFIND_PROPERTY_NAMES}, {@link #PROPFIND_ALL_PROP_INCLUDE}
*/
public MultiStatusResponse(
DavResource resource, DavPropertyNameSet propNameSet,
int propFindType) {
this(resource.getHref(), null, TYPE_PROPSTAT);
if (propFindType == PROPFIND_PROPERTY_NAMES) {
// only property names requested
PropContainer status200 = getPropContainer(DavServletResponse.SC_OK, true);
for (DavPropertyName propName : resource.getPropertyNames()) {
status200.addContent(propName);
}
} else {
// all or a specified set of property and their values requested.
PropContainer status200 = getPropContainer(DavServletResponse.SC_OK, false);
// Collection of missing property names for 404 responses
Set missing = new HashSet(propNameSet.getContent());
// Add requested properties or all non-protected properties,
// or non-protected properties plus requested properties (allprop/include)
if (propFindType == PROPFIND_BY_PROPERTY) {
// add explicitly requested properties (proptected or non-protected)
for (DavPropertyName propName : propNameSet) {
DavProperty prop = resource.getProperty(propName);
if (prop != null) {
status200.addContent(prop);
missing.remove(propName);
}
}
} else {
// add all non-protected properties
for (DavProperty property : resource.getProperties()) {
boolean allDeadPlusRfc4918LiveProperties =
propFindType == PROPFIND_ALL_PROP
|| propFindType == PROPFIND_ALL_PROP_INCLUDE;
boolean wasRequested = missing.remove(property.getName());
if ((allDeadPlusRfc4918LiveProperties
&& !property.isInvisibleInAllprop())
|| wasRequested) {
status200.addContent(property);
}
}
// try if missing properties specified in the include section
// can be obtained using resource.getProperty
if (propFindType == PROPFIND_ALL_PROP_INCLUDE && !missing.isEmpty()) {
for (DavPropertyName propName : new HashSet(missing)) {
DavProperty prop = resource.getProperty(propName);
if (prop != null) {
status200.addContent(prop);
missing.remove(propName);
}
}
}
}
if (!missing.isEmpty() && propFindType != PROPFIND_ALL_PROP) {
PropContainer status404 = getPropContainer(DavServletResponse.SC_NOT_FOUND, true);
for (DavPropertyName propName : missing) {
status404.addContent(propName);
}
}
}
}
/**
* Returns the href
*
* @return href
* @see MultiStatusResponse#getHref()
*/
public String getHref() {
return href;
}
/**
* @return responseDescription
* @see MultiStatusResponse#getResponseDescription()
*/
public String getResponseDescription() {
return responseDescription;
}
/**
* Return an array listing all 'status' available is this response object.
* Note, that a the array contains a single element if this
* MultiStatusResponse defines an response consisting of
* href and status elements.
*
* @return
*/
public Status[] getStatus() {
Status[] sts;
if (type == TYPE_PROPSTAT) {
sts = new Status[statusMap.size()];
Iterator iter = statusMap.keySet().iterator();
for (int i = 0; iter.hasNext(); i++) {
Integer statusKey = iter.next();
sts[i] = new Status(statusKey);
}
} else {
sts = new Status[] {status};
}
return sts;
}
/**
* @return {@code true} if the response is of type "propstat" (containing information about individual properties)
*/
public boolean isPropStat() {
return this.type == TYPE_PROPSTAT;
}
/**
* @param document
* @see org.apache.jackrabbit.webdav.xml.XmlSerializable#toXml(org.w3c.dom.Document)
*/
public Element toXml(Document document) {
Element response = DomUtil.createElement(document, XML_RESPONSE, NAMESPACE);
// add ''
response.appendChild(DomUtil.hrefToXml(getHref(), document));
if (type == TYPE_PROPSTAT) {
// add '' elements
for (Integer statusKey : statusMap.keySet()) {
Status st = new Status(statusKey);
PropContainer propCont = statusMap.get(statusKey);
if (!propCont.isEmpty()) {
Element propstat = DomUtil.createElement(document, XML_PROPSTAT, NAMESPACE);
propstat.appendChild(propCont.toXml(document));
propstat.appendChild(st.toXml(document));
response.appendChild(propstat);
}
}
} else {
// add a single '' element
// NOTE: a href+status response cannot be created with 'null' status
response.appendChild(status.toXml(document));
}
// add the optional '' element
String description = getResponseDescription();
if (description != null) {
Element desc = DomUtil.createElement(document, XML_RESPONSEDESCRIPTION, NAMESPACE);
DomUtil.setText(desc, description);
response.appendChild(desc);
}
return response;
}
//----------------------------------------------< type specific methods >---
/**
* Adds a property to this response '200' propstat set.
*
* @param property the property to add
*/
public void add(DavProperty property) {
checkType(TYPE_PROPSTAT);
PropContainer status200 = getPropContainer(DavServletResponse.SC_OK, false);
status200.addContent(property);
}
/**
* Adds a property name to this response '200' propstat set.
*
* @param propertyName the property name to add
*/
public void add(DavPropertyName propertyName) {
checkType(TYPE_PROPSTAT);
PropContainer status200 = getPropContainer(DavServletResponse.SC_OK, true);
status200.addContent(propertyName);
}
/**
* Adds a property to this response
*
* @param property the property to add
* @param status the status of the response set to select
*/
public void add(DavProperty property, int status) {
checkType(TYPE_PROPSTAT);
PropContainer propCont = getPropContainer(status, false);
propCont.addContent(property);
}
/**
* Adds a property name to this response
*
* @param propertyName the property name to add
* @param status the status of the response set to select
*/
public void add(DavPropertyName propertyName, int status) {
checkType(TYPE_PROPSTAT);
PropContainer propCont = getPropContainer(status, true);
propCont.addContent(propertyName);
}
/**
* @param status
* @return
*/
private PropContainer getPropContainer(int status, boolean forNames) {
PropContainer propContainer = statusMap.get(status);
if (propContainer == null) {
if (forNames) {
propContainer = new DavPropertyNameSet();
} else {
propContainer = new DavPropertySet();
}
statusMap.put(status, propContainer);
}
return propContainer;
}
private void checkType(int type) {
if (this.type != type) {
throw new IllegalStateException("The given MultiStatusResponse is not of the required type.");
}
}
/**
* Get properties present in this response for the given status code. In
* case this MultiStatusResponse does not represent a 'propstat' response,
* always an empty {@link DavPropertySet} will be returned.
*
* @param status
* @return property set
*/
public DavPropertySet getProperties(int status) {
if (statusMap.containsKey(status)) {
PropContainer mapEntry = statusMap.get(status);
if (mapEntry != null && mapEntry instanceof DavPropertySet) {
return (DavPropertySet) mapEntry;
}
}
return new DavPropertySet();
}
/**
* Get property names present in this response for the given status code. In
* case this MultiStatusResponse does not represent a 'propstat' response,
* always an empty {@link DavPropertyNameSet} will be returned.
*
* @param status
* @return property names
*/
public DavPropertyNameSet getPropertyNames(int status) {
if (statusMap.containsKey(status)) {
PropContainer mapEntry = statusMap.get(status);
if (mapEntry != null) {
if (mapEntry instanceof DavPropertySet) {
DavPropertyNameSet set = new DavPropertyNameSet();
for (DavPropertyName name : ((DavPropertySet) mapEntry).getPropertyNames()) {
set.add(name);
}
return set;
} else {
// is already a DavPropertyNameSet
return (DavPropertyNameSet) mapEntry;
}
}
}
return new DavPropertyNameSet();
}
/**
* Build a new response object from the given xml element.
*
* @param responseElement
* @return new MultiStatusResponse instance
* @throws IllegalArgumentException if the specified element is
* null or not a DAV:response element or if the mandatory
* DAV:href child is missing.
*/
public static MultiStatusResponse createFromXml(Element responseElement) {
if (!DomUtil.matches(responseElement, XML_RESPONSE, NAMESPACE)) {
throw new IllegalArgumentException("DAV:response element required.");
}
String href = DomUtil.getChildTextTrim(responseElement, XML_HREF, NAMESPACE);
if (href == null) {
throw new IllegalArgumentException("DAV:response element must contain a DAV:href element expected.");
}
String statusLine = DomUtil.getChildText(responseElement, XML_STATUS, NAMESPACE);
String responseDescription = DomUtil.getChildText(responseElement, XML_RESPONSEDESCRIPTION, NAMESPACE);
MultiStatusResponse response;
if (statusLine != null) {
Status status = Status.parse(statusLine);
response = new MultiStatusResponse(href, status, responseDescription);
} else {
response = new MultiStatusResponse(href, responseDescription, TYPE_PROPSTAT);
// read propstat elements
ElementIterator it = DomUtil.getChildren(responseElement, XML_PROPSTAT, NAMESPACE);
while (it.hasNext()) {
Element propstat = it.nextElement();
String propstatus = DomUtil.getChildText(propstat, XML_STATUS, NAMESPACE);
Element prop = DomUtil.getChildElement(propstat, XML_PROP, NAMESPACE);
if (propstatus != null && prop != null) {
int statusCode = Status.parse(propstatus).getStatusCode();
ElementIterator propIt = DomUtil.getChildren(prop);
while (propIt.hasNext()) {
Element el = propIt.nextElement();
/*
always build dav property from the given element, since
distinction between prop-names and properties not having
a value is not possible.
retrieval of the set of 'property names' is possible from
the given prop-set by calling DavPropertySet#getPropertyNameSet()
*/
DavProperty property = DefaultDavProperty.createFromXml(el);
response.add(property, statusCode);
}
}
}
}
return response;
}
/**
* @param href
* @return false if the given href is null or empty string.
*/
private static boolean isValidHref(String href) {
return href != null && !"".equals(href);
}
}