basexpathtest.java

XML的解析、编译、查询等技术的JAVA源代码。

/*
 * $Header$
 * $Revision$
 * $Date$
 *
 * ====================================================================
 *
 * Copyright 2005 bob mcwhirter & James Strachan.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 
 *   * Neither the name of the Jaxen Project nor the names of its
 *     contributors may be used to endorse or promote products derived 
 *     from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * ====================================================================
 * This software consists of voluntary contributions made by many 
 * individuals on behalf of the Jaxen Project and was originally 
 * created by bob mcwhirter <[e-mail]> and 
 * James Strachan <[e-mail]>.  For more information on the 
 * Jaxen Project, please see <http://www.jaxen.org/>.
 * 
 * $Id$
 */


package org.jaxen.test;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.util.Iterator;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.jaxen.BaseXPath;
import org.jaxen.JaxenException;
import org.jaxen.NamespaceContext;
import org.jaxen.SimpleNamespaceContext;
import org.jaxen.XPath;
import org.jaxen.dom.DOMXPath;
import org.jaxen.dom.DocumentNavigator;
import org.jaxen.dom.NamespaceNode;
import org.jaxen.pattern.Pattern;
import org.jaxen.saxpath.helpers.XPathReaderFactory;
import org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Text;
import org.xml.sax.SAXException;

import junit.framework.TestCase;

/**
 * <p>
 * Tests for org.jaxen.BaseXPath.
 * </p>
 * 
 * @author Elliotte Rusty Harold
 * @version 1.1b10
 *
 */
public class BaseXPathTest extends TestCase {

    private org.w3c.dom.Document doc;
    private DocumentBuilder builder;

    public BaseXPathTest(String name) {
        super(name);
    }
    
    protected void setUp() throws ParserConfigurationException {
        
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        factory.setNamespaceAware(true);
        doc = factory.newDocumentBuilder().newDocument();
        builder = factory.newDocumentBuilder();
        
    }
    
    public void testSelectSingleNodeForContext() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("1 + 2");
        
        String stringValue = xpath.stringValueOf(xpath);
        assertEquals("3", stringValue);
        
        Number numberValue = xpath.numberValueOf(xpath);
        assertEquals(3, numberValue.doubleValue(), 0.00001);
        
    }
    
    
    public void testParentOfSelection() throws JaxenException {
        /*
        html
            a
                img
            a        <- return that node
                img   <- select this node
        */
        XPath xpath = new DOMXPath("(/html/a/img[contains(@src,'gif')])[2]/..");
        org.w3c.dom.Element html = doc.createElementNS("", "html");
        org.w3c.dom.Element a1 = doc.createElementNS("", "a");
        org.w3c.dom.Element a2 = doc.createElementNS("", "a");
        org.w3c.dom.Element img1 = doc.createElementNS("", "img");
          org.w3c.dom.Attr img1_src = doc.createAttributeNS("", "src");
        img1_src.setValue("1.gif");
        org.w3c.dom.Element img2 = doc.createElementNS("", "img");
        org.w3c.dom.Attr img2_src = doc.createAttributeNS("", "src");
        img2_src.setValue("2.gif");

        img1.setAttributeNode(img1_src);
        img2.setAttributeNode(img2_src);
        a1.appendChild(img1);
        a2.appendChild(img2);
        html.appendChild(a1);
        html.appendChild(a2);
        doc.appendChild(html);

        List result = xpath.selectNodes(doc);
        assertEquals(1, result.size());
        assertEquals(a2, result.get(0));
    }


    
    
    public void testEvaluateString() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("string(/*)");
        
        doc.appendChild(doc.createElement("root"));
        String stringValue = (String) xpath.evaluate(doc);
        assertEquals("", stringValue);
        
    }
    
    
    public void testNumberValueOfEmptyNodeSetIsNaN() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("/x");
        
        doc.appendChild(doc.createElement("root"));
        Double numberValue = (Double) xpath.numberValueOf(doc);
        assertTrue(numberValue.isNaN());
        
    }
    
    
    public void testPathWithParentheses() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("(/root)/child");
        
        Element root = doc.createElement("root");
        doc.appendChild(root);
        Element child = doc.createElement("child");
        root.appendChild(child);
        
        assertEquals(child, xpath.selectSingleNode(doc));
        
    }
    
    
    public void testEvaluateWithMultiNodeAnswer() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("(/descendant-or-self::node())");
        
        doc.appendChild(doc.createElement("root"));
        List result = (List) xpath.evaluate(doc);
        assertEquals(2, result.size());
        
    }
    
    
    public void testValueOfEmptyListIsEmptyString() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("/element");
        doc.appendChild(doc.createElement("root"));
        
        String stringValue = xpath.stringValueOf(doc);
        assertEquals("", stringValue);
        
    }

    public void testAllNodesQuery() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("//. | /");
        org.w3c.dom.Element root = doc.createElementNS("http://www.example.org/", "root");
        doc.appendChild(root);
        
        String stringValue = xpath.stringValueOf(doc);
        assertEquals("", stringValue);
        
    }

    
    public void testAncestorAxis() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("ancestor::*");
        org.w3c.dom.Element root = doc.createElementNS("", "root");
        org.w3c.dom.Element parent = doc.createElementNS("", "parent");
        doc.appendChild(root);
        org.w3c.dom.Element child = doc.createElementNS("", "child");
        root.appendChild(parent);
        parent.appendChild(child);
        
        List result = xpath.selectNodes(child);
        assertEquals(2, result.size());
        assertEquals(root, result.get(0));   
        assertEquals(parent, result.get(1));
        
    }    
    
    
    public void testPrecedingSiblingAxisIsInDocumentOrder() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("preceding-sibling::*");
        org.w3c.dom.Element root = doc.createElementNS("", "root");
        doc.appendChild(root);
        org.w3c.dom.Element child1 = doc.createElementNS("", "child1");
        root.appendChild(child1);
        org.w3c.dom.Element child2 = doc.createElementNS("", "child2");
        root.appendChild(child2);
        org.w3c.dom.Element child3 = doc.createElementNS("", "child3");
        root.appendChild(child3);
        
        List result = xpath.selectNodes(child3);
        assertEquals(2, result.size());
        assertEquals(child1, result.get(0));   
        assertEquals(child2, result.get(1));
        
    }    
    
    
    public void testPrecedingAxisIsInDocumentOrder() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("preceding::*");
        org.w3c.dom.Element root = doc.createElementNS("", "root");
        doc.appendChild(root);
        org.w3c.dom.Element parent1 = doc.createElementNS("", "parent1");
        root.appendChild(parent1);
        org.w3c.dom.Element parent2 = doc.createElementNS("", "parent2");
        root.appendChild(parent2);
        org.w3c.dom.Element child1 = doc.createElementNS("", "child1");
        parent2.appendChild(child1);
        org.w3c.dom.Element child2 = doc.createElementNS("", "child2");
        parent2.appendChild(child2);
        org.w3c.dom.Element child3 = doc.createElementNS("", "child3");
        parent2.appendChild(child3);
        
        List result = xpath.selectNodes(child3);
        assertEquals(3, result.size());
        assertEquals(parent1, result.get(0));   
        assertEquals(child1, result.get(1));   
        assertEquals(child2, result.get(2));
        
    }    
    
    
    public void testPrecedingAxisWithPositionalPredicate() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("preceding::*[1]");
        org.w3c.dom.Element root = doc.createElementNS("", "root");
        doc.appendChild(root);
        org.w3c.dom.Element child1 = doc.createElementNS("", "child1");
        root.appendChild(child1);
        org.w3c.dom.Element child2 = doc.createElementNS("", "child2");
        root.appendChild(child2);
        org.w3c.dom.Element child3 = doc.createElementNS("", "child3");
        root.appendChild(child3);
        
        List result = xpath.selectNodes(child3);
        assertEquals(1, result.size());  
        assertEquals(child2, result.get(0));
        
    }    
    
    
    public void testAncestorAxisWithPositionalPredicate() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("ancestor::*[1]");
        org.w3c.dom.Element root = doc.createElementNS("", "root");
        doc.appendChild(root);
        org.w3c.dom.Element child1 = doc.createElementNS("", "child1");
        root.appendChild(child1);
        org.w3c.dom.Element child2 = doc.createElementNS("", "child2");
        child1.appendChild(child2);
        org.w3c.dom.Element child3 = doc.createElementNS("", "child3");
        child2.appendChild(child3);
        
        List result = xpath.selectNodes(child3);
        assertEquals(1, result.size());  
        assertEquals(child2, result.get(0));
        
    }    
    
    
    public void testAncestorOrSelfAxis() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("ancestor-or-self::*");
        org.w3c.dom.Element root = doc.createElementNS("", "root");
        org.w3c.dom.Element parent = doc.createElementNS("", "parent");
        doc.appendChild(root);
        org.w3c.dom.Element child = doc.createElementNS("", "child");
        root.appendChild(parent);
        parent.appendChild(child);
        
        List result = xpath.selectNodes(child);
        assertEquals(3, result.size());
        assertEquals(root, result.get(0));   
        assertEquals(parent, result.get(1));
        assertEquals(child, result.get(2));
        
    }    
    
    
    // test case for JAXEN-55
    public void testAbbreviatedDoubleSlashAxis() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("//x");
        org.w3c.dom.Element a = doc.createElementNS("", "a");
        org.w3c.dom.Element b = doc.createElementNS("", "b");
        doc.appendChild(a);
        org.w3c.dom.Element x1 = doc.createElementNS("", "x");
        x1.appendChild(doc.createTextNode("1"));
        a.appendChild(x1);
        a.appendChild(b);
        org.w3c.dom.Element x2 = doc.createElementNS("", "x");
        org.w3c.dom.Element x3 = doc.createElementNS("", "x");
        org.w3c.dom.Element x4 = doc.createElementNS("", "x");
        a.appendChild(x4);
        b.appendChild(x2);
        b.appendChild(x3);
        x2.appendChild(doc.createTextNode("2"));
        x3.appendChild(doc.createTextNode("3"));
        x4.appendChild(doc.createTextNode("4"));
        
        List result = xpath.selectNodes(doc);
        assertEquals(4, result.size());
        assertEquals(x1, result.get(0));   
        assertEquals(x2, result.get(1));   
        assertEquals(x3, result.get(2));   
        assertEquals(x4, result.get(3));
        
    }    
    
    
    // test case for JAXEN-55
    public void testAncestorFollowedByChildren() throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("/a/b/x/ancestor::*/child::x");
        org.w3c.dom.Element a = doc.createElementNS("", "a");
        org.w3c.dom.Element b = doc.createElementNS("", "b");
        doc.appendChild(a);
        org.w3c.dom.Element x1 = doc.createElementNS("", "x");
        x1.appendChild(doc.createTextNode("1"));
        a.appendChild(x1);
        a.appendChild(b);
        org.w3c.dom.Element x2 = doc.createElementNS("", "x");
        org.w3c.dom.Element x3 = doc.createElementNS("", "x");
        org.w3c.dom.Element x4 = doc.createElementNS("", "x");