org.apache.axiom.util.namespace.MapBasedNamespaceContext 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.axiom.util.namespace;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import javax.xml.XMLConstants;
/**
* Namespace context implementation that stores namespace bindings in a {@link Map}.
*/
public class MapBasedNamespaceContext extends AbstractNamespaceContext {
private final Map namespaces;
/**
* Constructor.
*
* @param map
* a map containing the (prefix, namespace URI) entries
*/
public MapBasedNamespaceContext(Map map) {
namespaces = map;
}
protected String doGetNamespaceURI(String prefix) {
String namespaceURI = (String)namespaces.get(prefix);
return namespaceURI == null ? XMLConstants.NULL_NS_URI : namespaceURI;
}
protected String doGetPrefix(String nsURI) {
Iterator iter = namespaces.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry entry = (Map.Entry) iter.next();
String uri = (String) entry.getValue();
if (uri.equals(nsURI)) {
return (String) entry.getKey();
}
}
if (nsURI.length() == 0) {
return "";
}
return null;
}
protected Iterator doGetPrefixes(String nsURI) {
Set prefixes = null;
Iterator iter = namespaces.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry entry = (Map.Entry) iter.next();
String uri = (String) entry.getValue();
if (uri.equals(nsURI)) {
if (prefixes == null) {
prefixes = new HashSet();
}
prefixes.add(entry.getKey());
}
}
if (prefixes != null) {
return Collections.unmodifiableSet(prefixes).iterator();
} else if (nsURI.length() == 0) {
return Collections.singleton("").iterator();
} else {
return Collections.EMPTY_LIST.iterator();
}
}
}