Commons JXPath example source code file (BasicNodeSetTest.java)

This example Commons JXPath source code file (BasicNodeSetTest.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 - Commons JXPath tags/keywords

basicnodeset, basicnodesettest, black, dom, element, integer, integer, iterator, iterator, jack, jack, jim, john, john, list, util

The Commons JXPath BasicNodeSetTest.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.commons.jxpath;

import java.util.Iterator;
import java.util.List;

import org.w3c.dom.Element;

/**
 * Test BasicNodeSet
 * 
 * @author Matt Benson
 * @version $Revision: 658784 $ $Date: 2007-12-10 15:15:27 -0600 (Mon, 10 Dec
 *          2007) $
 */
public class BasicNodeSetTest extends JXPathTestCase {

    /** JXPathContext */
    protected JXPathContext context;

    /** BasicNodeSet */
    protected BasicNodeSet nodeSet;

    protected void setUp() throws Exception {
        super.setUp();
        context = JXPathContext.newContext(new TestMixedModelBean());
        nodeSet = new BasicNodeSet();
    }

    /**
     * Add the pointers for the specified path to <code>nodeSet.
     * 
     * @param xpath
     */
    protected void addPointers(String xpath) {
        for (Iterator iter = context.iteratePointers(xpath); iter.hasNext();) {
            nodeSet.add((Pointer) iter.next());
        }
        nudge();
    }

    /**
     * Remove the pointers for the specified path from <code>nodeSet.
     * 
     * @param xpath
     */
    protected void removePointers(String xpath) {
        for (Iterator iter = context.iteratePointers(xpath); iter.hasNext();) {
            nodeSet.remove((Pointer) iter.next());
        }
        nudge();
    }

    /**
     * "Nudge" the nodeSet.
     */
    protected void nudge() {
        nodeSet.getPointers();
        nodeSet.getValues();
        nodeSet.getNodes();
    }

    /**
     * Test adding pointers.
     */
    public void testAdd() {
        addPointers("/bean/integers");
        assertEquals(nodeSet.getPointers().toString(), list("/bean/integers[1]",
                "/bean/integers[2]", "/bean/integers[3]", "/bean/integers[4]").toString());
        assertEquals(list(new Integer(1), new Integer(2), new Integer(3),
                new Integer(4)), nodeSet.getValues());
        assertEquals(list(new Integer(1), new Integer(2), new Integer(3),
                new Integer(4)), nodeSet.getNodes());
    }

    /**
     * Test removing a pointer.
     */
    public void testRemove() {
        addPointers("/bean/integers");
        removePointers("/bean/integers[4]");
        assertEquals(list("/bean/integers[1]", "/bean/integers[2]", "/bean/integers[3]")
                .toString(), nodeSet.getPointers().toString());
        assertEquals(list(new Integer(1), new Integer(2), new Integer(3)),
                nodeSet.getValues());
        assertEquals(list(new Integer(1), new Integer(2), new Integer(3)),
                nodeSet.getNodes());
    }

    /**
     * Demonstrate when nodes != values:  in XML models.
     */
    public void testNodes() {
        addPointers("/document/vendor/contact");
        assertEquals(list("/document/vendor[1]/contact[1]",
                "/document/vendor[1]/contact[2]",
                "/document/vendor[1]/contact[3]",
                "/document/vendor[1]/contact[4]").toString(),
                nodeSet.getPointers().toString());
        assertEquals(list("John", "Jack", "Jim", "Jack Black"),
                nodeSet.getValues());
        assertElementNames(list("contact", "contact", "contact", "contact"), nodeSet.getNodes());
        assertElementValues(list("John", "Jack", "Jim", "Jack Black"), nodeSet.getNodes());
    }

    /**
     * Do assertions on DOM element names.
     * @param names List of expected names
     * @param elements List of DOM elements
     */
    protected void assertElementNames(List names, List elements) {
        assertEquals(names.size(), elements.size());
        Iterator nameIter = names.iterator();
        Iterator elementIter = elements.iterator();
        while (elementIter.hasNext()) {
            assertEquals(nameIter.next(), ((Element) elementIter.next()).getTagName());
        }
    }

    /**
     * Do assertions on DOM element values.
     * @param values List of expected values
     * @param elements List of DOM elements
     */
    protected void assertElementValues(List values, List elements) {
        assertEquals(values.size(), elements.size());
        Iterator valueIter = values.iterator();
        Iterator elementIter = elements.iterator();
        while (elementIter.hasNext()) {
            assertEquals(valueIter.next(), ((Element) elementIter.next()).getFirstChild().getNodeValue());
        }
        
    }
}