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/*
* Copyright 2002-2006 the original author or authors.
*
* Licensed 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.implementation.spring.namespace;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import javax.xml.namespace.QName;
import org.springframework.beans.factory.xml.NamespaceHandlerSupport;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
* Handler for the <sca:> namespace in an application context
*
* @version $Rev$ $Date$
*/
public class ScaNamespaceHandler extends NamespaceHandlerSupport {
public ScaNamespaceHandler() {
}
@Override
public void init() {
registerBeanDefinitionParser("reference", new ScaReferenceBeanDefinitionParser());
registerBeanDefinitionParser("service", new ScaServiceBeanDefinitionParser());
registerBeanDefinitionParser("property", new ScaPropertyBeanDefinitionParser());
}
private static String getNamespaceURI(Element element, String prefix) {
if (element == null) {
return null;
}
String name = ("".equals(prefix)) ? "xmlns" : "xmlns:" + prefix;
String ns = element.getAttribute(name);
if (ns != null && !"".equals(ns)) {
return ns;
}
Node parent = element.getParentNode();
if (parent instanceof Element) {
return getNamespaceURI((Element)parent, prefix);
} else {
return null;
}
}
public static List<QName> resolve(Element element, String listOfNames) {
List<QName> qnames = new ArrayList<QName>();
StringTokenizer tokenizer = new StringTokenizer(listOfNames);
while (tokenizer.hasMoreTokens()) {
String qname = tokenizer.nextToken();
String prefix = "";
String local = qname;
int index = qname.indexOf(':');
if (index != -1) {
local = qname.substring(index + 1);
prefix = qname.substring(0, index);
}
String ns = getNamespaceURI(element, prefix);
if (ns != null) {
qnames.add(new QName(ns, local, prefix));
} else {
throw new IllegalArgumentException("Prefix " + prefix + "is not bound to a namespace");
}
}
return qnames;
}
public static String getAttribute(Element element, String name) {
String attr = element.getAttributeNS(null, name);
if ("".equals(attr)) {
return null;
} else {
return attr;
}
}
}
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