/**
* 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.cxf.helpers;
import java.util.Map;
import javax.xml.namespace.NamespaceContext;
import javax.xml.namespace.QName;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.apache.cxf.common.classloader.ClassLoaderUtils;
import org.apache.cxf.common.classloader.ClassLoaderUtils.ClassLoaderHolder;
public class XPathUtils {
private static XPathFactory xpathFactory = XPathFactory.newInstance();
private XPath xpath;
public XPathUtils() {
xpath = xpathFactory.newXPath();
}
public XPathUtils(final Map<String, String> ns) {
this();
if (ns != null) {
xpath.setNamespaceContext(new MapNamespaceContext(ns));
}
}
public XPathUtils(final NamespaceContext ctx) {
this();
xpath.setNamespaceContext(ctx);
}
public Object getValue(String xpathExpression, Node node, QName type) {
ClassLoaderHolder loader
= ClassLoaderUtils.setThreadContextClassloader(xpath.getClass().getClassLoader());
try {
return xpath.evaluate(xpathExpression, node, type);
} catch (Exception e) {
return null;
} finally {
if (loader != null) {
loader.reset();
}
}
}
public NodeList getValueList(String xpathExpression, Node node) {
return (NodeList)getValue(xpathExpression, node, XPathConstants.NODESET);
}
public String getValueString(String xpathExpression, Node node) {
return (String)getValue(xpathExpression, node, XPathConstants.STRING);
}
public Node getValueNode(String xpathExpression, Node node) {
return (Node)getValue(xpathExpression, node, XPathConstants.NODE);
}
public boolean isExist(String xpathExpression, Node node, QName type) {
return getValue(xpathExpression, node, type) != null;
}
}