/**
* 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.xml.security.stax.impl.stax;
import org.apache.xml.security.stax.ext.stax.XMLSecNamespace;
import javax.xml.XMLConstants;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamConstants;
import java.util.Map;
import java.util.WeakHashMap;
/**
* Class to let XML-Namespaces be comparable how it is requested by C14N
*
* @author $Author: coheigea $
* @version $Revision: 1513098 $ $Date: 2013-08-12 11:28:33 +0100 (Mon, 12 Aug 2013) $
*/
public class XMLSecNamespaceImpl extends XMLSecEventBaseImpl implements XMLSecNamespace {
private static final Map<String, Map<String, XMLSecNamespace>> xmlSecNamespaceMap =
new WeakHashMap<String, Map<String, XMLSecNamespace>>();
private String prefix;
private final String uri;
private QName qName;
private XMLSecNamespaceImpl(String prefix, String uri) {
this.prefix = prefix;
this.uri = uri;
}
public static XMLSecNamespace getInstance(String prefix, String uri) {
if (prefix == null) {
prefix = "";
}
//sun's stax parser returns null for the default namespace
if (uri == null) {
uri = "";
}
Map<String, XMLSecNamespace> nsMap = xmlSecNamespaceMap.get(prefix);
if (nsMap != null) {
XMLSecNamespace xmlSecNamespace = nsMap.get(uri);
if (xmlSecNamespace != null) {
return xmlSecNamespace;
} else {
xmlSecNamespace = new XMLSecNamespaceImpl(prefix, uri);
nsMap.put(uri, xmlSecNamespace);
return xmlSecNamespace;
}
} else {
nsMap = new WeakHashMap<String, XMLSecNamespace>();
XMLSecNamespace xmlSecNamespace = new XMLSecNamespaceImpl(prefix, uri);
nsMap.put(uri, xmlSecNamespace);
xmlSecNamespaceMap.put(prefix, nsMap);
return xmlSecNamespace;
}
}
@Override
public int compareTo(XMLSecNamespace o) {
//An element's namespace nodes are sorted lexicographically by local name
//(the default namespace node, if one exists, has no local name and is therefore lexicographically least).
return this.prefix.compareTo(o.getPrefix());
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof XMLSecNamespace)) {
return false;
}
XMLSecNamespace comparableNamespace = (XMLSecNamespace) obj;
if (comparableNamespace.hashCode() != this.hashCode()) {
return false;
}
//just test for prefix to get the last prefix definition on the stack and let overwrite it
return comparableNamespace.getPrefix().equals(this.prefix);
}
@Override
public int hashCode() {
//we don't have to cache the hashCode. The string class takes already care of it.
return this.prefix.hashCode();
}
@Override
public QName getName() {
if (this.qName == null) {
this.qName = new QName(XMLConstants.XMLNS_ATTRIBUTE_NS_URI, this.prefix);
}
return this.qName;
}
@Override
public String getValue() {
return this.uri;
}
@Override
public String getDTDType() {
return "CDATA";
}
@Override
public boolean isSpecified() {
return true;
}
@Override
public String getNamespaceURI() {
return uri;
}
@Override
public String getPrefix() {
return prefix;
}
@Override
public boolean isDefaultNamespaceDeclaration() {
return prefix.length() == 0;
}
@Override
public int getEventType() {
return XMLStreamConstants.NAMESPACE;
}
@Override
public boolean isNamespace() {
return true;
}
@Override
public String toString() {
if (this.prefix == null || this.prefix.isEmpty()) {
return "xmlns=\"" + this.uri + "\"";
}
return "xmlns:" + this.prefix + "=\"" + this.uri + "\"";
}
}