/**
* 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.cxf.staxutils.transform;
import java.util.Deque;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import javax.xml.XMLConstants;
import javax.xml.namespace.NamespaceContext;
public class DelegatingNamespaceContext implements NamespaceContext {
private NamespaceContext nc;
private Map<String, String> nsMap;
private Deque<Map<String, String>> namespaces;
private Deque<Map<String, String>> prefixes;
public DelegatingNamespaceContext(NamespaceContext nc, Map<String, String> nsMap) {
this.nc = nc;
this.nsMap = nsMap;
namespaces = new LinkedList<Map<String, String>>();
prefixes = new LinkedList<Map<String, String>>();
}
public void down() {
namespaces.addFirst(new HashMap<String, String>(8));
prefixes.addFirst(new HashMap<String, String>(8));
}
public void up() {
namespaces.removeFirst();
prefixes.removeFirst();
}
public void addPrefix(String prefix, String ns) {
if (!namespaces.isEmpty()) {
namespaces.getFirst().put(prefix, ns);
prefixes.getFirst().put(ns, prefix);
}
}
public String findUniquePrefix(String ns) {
if (ns.length() == 0) {
return null;
}
String existingPrefix = getPrefix(ns);
if (existingPrefix != null) {
return existingPrefix;
}
int i = 0;
while (true) {
String prefix = "ps" + ++i;
if (getNamespaceURI(prefix) == null) {
addPrefix(prefix, ns);
return prefix;
}
}
}
public String getNamespaceURI(String prefix) {
if (!namespaces.isEmpty()) {
Map<String, String> cache = namespaces.getFirst();
for (Map<String, String> nss : namespaces) {
String ns = nss.get(prefix);
if (ns != null) {
if (cache != nss) {
cache.put(prefix, ns);
}
return ns;
}
}
}
if (XMLConstants.XML_NS_PREFIX.equals(prefix)) {
return XMLConstants.XML_NS_URI;
} else if (XMLConstants.XMLNS_ATTRIBUTE.equals(prefix)) {
return XMLConstants.XMLNS_ATTRIBUTE_NS_URI;
}
String ns = nc.getNamespaceURI(prefix);
if (ns != null && ns.length() > 0) {
addPrefix(prefix, ns);
}
return ns;
}
public String getPrefix(String ns) {
if (ns.length() == 0) {
return null;
}
String value = nsMap.get(ns);
if (value != null && value.length() == 0) {
return null;
}
if (value != null) {
ns = value;
}
if (!prefixes.isEmpty()) {
Map<String, String> cache = prefixes.getFirst();
for (Map<String, String> pfs : prefixes) {
String prefix = pfs.get(ns);
if (prefix != null && ns.equals(getNamespaceURI(prefix))) {
if (pfs != cache) {
cache.put(ns, prefix);
}
return prefix;
}
}
}
if (XMLConstants.XML_NS_URI.equals(ns)) {
return XMLConstants.XML_NS_PREFIX;
} else if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(ns)) {
return XMLConstants.XMLNS_ATTRIBUTE;
}
String prefix = nc.getPrefix(ns);
if (prefix != null) {
addPrefix(prefix, ns);
}
return prefix;
}
public Iterator<String> getPrefixes(String ns) {
List<String> pl = new LinkedList<String>();
for (Map<String, String> nsp : namespaces) {
for (Map.Entry<String, String> nse : nsp.entrySet()) {
if (ns.equals(nse.getValue()) && ns.equals(getNamespaceURI(nse.getKey()))) {
pl.add(nse.getKey());
}
}
}
return pl.iterator();
}
}