org.camunda.bpm.engine.impl.bpmn.diagram.Bpmn20NamespaceContext Maven / Gradle / Ivy
/*
* Copyright Camunda Services GmbH and/or licensed to Camunda Services GmbH
* under one or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. Camunda licenses this file to you under the Apache License,
* Version 2.0; 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.camunda.bpm.engine.impl.bpmn.diagram;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import javax.xml.namespace.NamespaceContext;
import javax.xml.xpath.XPath;
/**
* XML {@link NamespaceContext} containing the namespaces used by BPMN 2.0 XML documents.
*
* Can be used in {@link XPath#setNamespaceContext(NamespaceContext)}.
*
* @author Falko Menge
*/
public class Bpmn20NamespaceContext implements NamespaceContext {
public static final String BPMN = "bpmn";
public static final String BPMNDI = "bpmndi";
public static final String OMGDC = "omgdc";
public static final String OMGDI = "omgdi";
/**
* This is a protected filed so you can extend that context with your own namespaces if necessary
*/
protected Map namespaceUris = new HashMap();
public Bpmn20NamespaceContext() {
namespaceUris.put(BPMN, "http://www.omg.org/spec/BPMN/20100524/MODEL");
namespaceUris.put(BPMNDI, "http://www.omg.org/spec/BPMN/20100524/DI");
namespaceUris.put(OMGDC, "http://www.omg.org/spec/DD/20100524/DI");
namespaceUris.put(OMGDI, "http://www.omg.org/spec/DD/20100524/DC");
}
public String getNamespaceURI(String prefix) {
return namespaceUris.get(prefix);
}
public String getPrefix(String namespaceURI) {
return getKeyByValue(namespaceUris, namespaceURI);
}
public Iterator getPrefixes(String namespaceURI) {
return getKeysByValue(namespaceUris, namespaceURI).iterator();
}
private static Set getKeysByValue(Map map, E value) {
Set keys = new HashSet();
for (Entry entry : map.entrySet()) {
if (value.equals(entry.getValue())) {
keys.add(entry.getKey());
}
}
return keys;
}
private static T getKeyByValue(Map map, E value) {
for (Entry entry : map.entrySet()) {
if (value.equals(entry.getValue())) {
return entry.getKey();
}
}
return null;
}
}