xpathtest.java

解决如何把XML应用到JAVA里问题

/*
 * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
 *
 * This software is open source.
 * See the bottom of this file for the licence.
 */

package org.dom4j;

import junit.textui.TestRunner;

import java.util.List;

import org.dom4j.tree.DefaultElement;
import org.dom4j.xpath.DefaultXPath;

/**
 * A test harness to test XPath expression evaluation in DOM4J
 * 
 * @author <a href="mailto:[e-mail]">James Strachan </a>
 * @version $Revision: 1.4 $
 */
public class XPathTest extends AbstractTestCase {
    protected static String[] paths = {
            ".",
            "*",
            "/",
            "/.",
            "/*",
            "/node()",
            "/child::node()",
            "/self::node()",
            "root",
            "/root",
            "/root/author",
            "text()",
            "//author",
            "//author/text()",
            "//@location",
            "//attribute::*",
            "//namespace::*",
            "normalize-space(/root)",
            "//author[@location]",
            "//author[@location='UK']",
            "root|author",
            "//*[.='James Strachan']",
            "//root/author[1]",
            "normalize-space(/root/author)",
            "normalize-space(' a  b  c  d ')",
            "//root|//author[1]|//author[2]",
            "//root/author[2]",
            "//root/author[3]"};

    public static void main(String[] args) {
        TestRunner.run(XPathTest.class);
    }

    // Test case(s)
    // -------------------------------------------------------------------------
    public void testBug1116471() throws Exception {
        String xml = "<a><b>Water T &amp; D-46816</b></a>";
        String expected = "Water T & D-46816";

        Document doc = DocumentHelper.parseText(xml);
        String result = (String) doc.selectObject("string(a/b[1])");
        
        assertEquals("xpath result not correct", expected, result);
        
        Node node = doc.selectSingleNode("a/b");
        String result2 = node.getStringValue();
        
        assertEquals("xpath result not correct", expected, result2);        
    }
    
    public void testXPaths() throws Exception {
        int size = paths.length;

        for (int i = 0; i < size; i++) {
            testXPath(paths[i]);
        }
    }

    public void testCreateXPathBug() throws Exception {
        Element element = new DefaultElement("foo");
        XPath xpath = element.createXPath("//bar");

        assertTrue(("created a valid XPath: " + xpath) != null);
    }

    public void testBug857704() throws Exception {
        Document doc = DocumentHelper
                .parseText("<foo xmlns:bar='http://blort'/>");
        doc.selectNodes("//*[preceding-sibling::*]"); // shouldn't throw NPE
    }

    public void testBooleanValueOf() throws Exception {
        Document doc = DocumentHelper.parseText("<root><foo>blah</foo></root>");

        XPath path = new DefaultXPath("//root");
        assertTrue(path.booleanValueOf(doc));

        path = new DefaultXPath("//root2");
        assertFalse(path.booleanValueOf(doc));
    }

    // Implementation methods
    // -------------------------------------------------------------------------
    protected void testXPath(String xpathExpression) {
        log("Searched path: " + xpathExpression);

        XPath xpath = DocumentHelper.createXPath(xpathExpression);

        List list = xpath.selectNodes(document);

        if (list == null) {
            log("null");
        } else {
            log("[");

            for (int i = 0, size = list.size(); i < size; i++) {
                Object object = list.get(i);

                String text = "null";

                if (object instanceof Node) {
                    Node node = (Node) object;

                    text = node.asXML();
                } else if (object != null) {
                    text = object.toString();
                }

                log("    " + text);
            }

            log("]");
        }

        log("...........................................");
    }
}

/*
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided that the
 * following conditions are met:
 * 
 * 1. Redistributions of source code must retain copyright statements and
 * notices. Redistributions must also contain a copy of this document.
 * 
 * 2. 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.
 * 
 * 3. The name "DOM4J" must not be used to endorse or promote products derived
 * from this Software without prior written permission of MetaStuff, Ltd. For
 * written permission, please contact [e-mail].
 * 
 * 4. Products derived from this Software may not be called "DOM4J" nor may
 * "DOM4J" appear in their names without prior written permission of MetaStuff,
 * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
 * 
 * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
 * 
 * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESSED 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 METASTUFF, LTD. OR ITS 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.
 * 
 * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
 */