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/*
* 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.tuscany.sca.common.xml.stax.reader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.xml.namespace.NamespaceContext;
public class NamespaceContextImpl implements NamespaceContext {
private NamespaceContext parent;
private Map<String, String> map = new HashMap<String, String>();
/**
* @param parent
*/
public NamespaceContextImpl(NamespaceContext parent) {
super();
this.parent = parent;
if (parent == null) {
map.put("xml", "http://www.w3.org/XML/1998/namespace");
map.put("xmlns", "http://www.w3.org/2000/xmlns/");
}
}
public String getNamespaceURI(String prefix) {
if (prefix == null) {
throw new IllegalArgumentException("Prefix is null");
}
String ns = (String)map.get(prefix);
if (ns != null) {
return ns;
}
if (parent != null) {
return parent.getNamespaceURI(prefix);
}
return null;
}
public String getPrefix(String nsURI) {
if (nsURI == null)
throw new IllegalArgumentException("Namespace is null");
for (Iterator<Map.Entry<String, String>> i = map.entrySet().iterator(); i.hasNext();) {
Map.Entry<String, String> entry = i.next();
if (entry.getValue().equals(nsURI)) {
return entry.getKey();
}
}
if (parent != null) {
return parent.getPrefix(nsURI);
}
return null;
}
public Iterator getPrefixes(String nsURI) {
List<String> prefixList = new ArrayList<String>();
for (Iterator<Map.Entry<String, String>> i = map.entrySet().iterator(); i.hasNext();) {
Map.Entry<String, String> entry = i.next();
if (entry.getValue().equals(nsURI)) {
prefixList.add(entry.getKey());
}
}
final Iterator<String> currentIterator = prefixList.iterator();
final Iterator parentIterator = parent == null ? null : parent.getPrefixes(nsURI);
return new Iterator() {
public boolean hasNext() {
return currentIterator.hasNext() || (parentIterator != null && parentIterator.hasNext());
}
public Object next() {
if (!hasNext()) {
throw new IllegalStateException("End of iterator has reached");
}
return currentIterator.hasNext() ? currentIterator.next() : parentIterator.next();
}
public void remove() {
throw new UnsupportedOperationException();
}
};
}
public void register(String prefix, String ns) {
map.put(prefix, ns);
}
public NamespaceContext getParent() {
return parent;
}
@Override
public String toString() {
StringBuffer sb = new StringBuffer(map.toString());
if (parent != null) {
sb.append("\nParent: ");
sb.append(parent);
}
return sb.toString();
}
}
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