com.ibm.commons.xml.drivers.JAXPDriverXerces Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of com.ibm.commons.xml Show documentation
The newest version!
/*
 * © Copyright IBM Corp. 2012
 * 
 * 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 com.ibm.commons.xml.drivers;

import javax.xml.transform.TransformerException;

import org.apache.xml.utils.PrefixResolver;
import org.apache.xpath.XPathAPI;
import org.apache.xpath.objects.XObject;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import com.ibm.commons.util.StringUtil;
import com.ibm.commons.xml.NamespaceContext;
import com.ibm.commons.xml.XResult;
import com.ibm.commons.xml.XResultUtils;
import com.ibm.commons.xml.xpath.NodeListImpl;
import com.ibm.commons.xml.xpath.XPathException;



/**
 * JAXP Driver using Xerces as the XPath engine.
 */
public class JAXPDriverXerces extends AbstractJAXPDriver {
    
    // =========================================================================================
    // XPATH
    // =========================================================================================

    // PHIL: temporary.
    // Not optimized method. Should move to a precompiled XPath object
    public Object createXPath(String xpath) throws XPathException {
        return xpath;
    }
    public XResult evaluateXPath(Node node, Object xpath, NamespaceContext nsContext) throws XPathException {
        try {
            PrefixResolver pr = nsContext!=null ? new NSResolver(nsContext) : null;
            XObject res = XPathAPI.eval(node,(String)xpath,pr);
            return convertResult(res);
        } catch(Exception e) {
            throw new XPathException(e,"Error while evaluating XPath {0}",xpath.toString()); // $NLS-AbstractXercesDriver.ErrorwhileevaluatingXPath0-1$
        }
    }
    public XResult evaluateXPath(NodeList nodeList, Object xpath, NamespaceContext nsContext) throws XPathException {
        try {
            if(nodeList.getLength()>0) {
                XResult result = null; 
                NodeListImpl nodes = null;
                PrefixResolver pr = nsContext!=null ? new NSResolver(nsContext) : null;
                for( int i=0; i0) {
                                if(nodes==null) {
                                    nodes = new NodeListImpl();
                                }
                                for( int j=0; j