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Apache CXF example source code file (XPathUtils.java)

This example Apache CXF source code file (XPathUtils.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Apache CXF tags/keywords

dom, factory, factory, mapnamespacecontext, node, node, nodelist, object, qname, string, string, util, xml, xpath, xpath, xpathfactory, xpathutils, xpathutils

The Apache CXF XPathUtils.java source code

/**
 * 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;

public class XPathUtils {
    private static final XPathFactory FACTORY = XPathFactory.newInstance();
    private XPath xpath;

    public XPathUtils() {
        xpath = FACTORY.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) {
        try {
            return xpath.evaluate(xpathExpression, node, type);
        } catch (Exception e) {
            return null;
        }
    }
    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;
    }

    public static XPathFactory getFactory() {
        return FACTORY;
    }
}

Other Apache CXF examples (source code examples)

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