xpathtestbase.java

XML的解析、编译、查询等技术的JAVA源代码。

/*
 * $Header$
 * $Revision$
 * $Date$
 *
 * ====================================================================
 *
 * Copyright 2000-2002 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 junit.framework.TestCase;

import org.jaxen.*;
import org.jaxen.dom.DOMXPath;
import org.jaxen.function.StringFunction;
import org.jaxen.saxpath.helpers.XPathReaderFactory;
import org.jaxen.pattern.Pattern;

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

public abstract class XPathTestBase extends TestCase
{
    protected static String VAR_URI   = "http://jaxen.org/test-harness/var";
    protected static String TESTS_XML = "xml/test/tests.xml";

    protected static boolean verbose = false;
    protected static boolean debug = false;
    private ContextSupport contextSupport;

    protected XPathTestBase(String name)
    {
        super(name);
    }

    protected void setUp() throws Exception
    {
        this.contextSupport = null;
        System.setProperty(XPathReaderFactory.DRIVER_PROPERTY,
                "");
        log("-----------------------------");
    }

    public void log(String text)
    {
        log(verbose,
                text);
    }

    private void log(boolean actualVerbose,
                    String text)
    {
        if (actualVerbose) System.out.println(text);
    }

    private void assertCountXPath(int expectedSize, Object context, String xpathStr) throws JaxenException
    {
        assertCountXPath2(expectedSize, context, xpathStr);
    }

    private Object assertCountXPath2(int expectedSize, Object context, String xpathStr) throws JaxenException
    {
        log(debug,
                "  Select :: " + xpathStr);
        DOMXPath xpath = new DOMXPath(xpathStr);
        List results = xpath.selectNodes(getContext(context));
        log(debug,
                "    Expected Size :: " + expectedSize);
        log(debug,
                "    Result Size   :: " + results.size());
        if (expectedSize != results.size())
        {
            log(debug,
                    "      ## FAILED");
            log(debug,
                    "      ## xpath: " + xpath + " = " + xpath.debug());
            Iterator resultIter = results.iterator();
            while (resultIter.hasNext())
            {
                log(debug,
                        "      --> " + resultIter.next());
            }
        }
        assertEquals(xpathStr,
                expectedSize,
                results.size());
        if (expectedSize > 0)
        {
            return results.get(0);
        }
        return null;
    }

    private void assertInvalidXPath(Object context, String xpathStr)
    {
        try
        {
            log(debug,
                    "  Select :: " + xpathStr);
            DOMXPath xpath = new DOMXPath(xpathStr);
            List results = xpath.selectNodes(getContext(context));
            log(debug,
                    "    Result Size   :: " + results.size());
            fail("An exception was expected.");
        }
        catch (JaxenException e)
        {
            log(debug, "    Caught expected exception " + e.getMessage());
        }
    }

    private void assertValueOfXPath(String expected, Object context, String xpathStr) throws JaxenException
    {
            DOMXPath xpath = new DOMXPath(xpathStr);
            Object node = xpath.evaluate(getContext(context));
            String result = StringFunction.evaluate(node,
                    getNavigator());
            log(debug,
                    "  Select :: " + xpathStr);
            log(debug,
                    "    Expected :: " + expected);
            log(debug,
                    "    Result   :: " + result);
            if (!expected.equals(result))
            {
                log(debug,
                        "      ## FAILED");
                log(debug,
                        "      ## xpath: " + xpath + " = " + xpath.debug());
            }
            assertEquals(xpathStr,
                    expected,
                    result);
        }

    private Context getContext(Object contextNode)
    {
        Context context = new Context(getContextSupport());
        List list = new ArrayList(1);
        list.add(contextNode);
        context.setNodeSet(list);
        return context;
    }

    private ContextSupport getContextSupport()
    {
        if (this.contextSupport == null)
        {
            this.contextSupport = new ContextSupport(new SimpleNamespaceContext(),
                    XPathFunctionContext.getInstance(),
                    new SimpleVariableContext(),
                    getNavigator());
        }
        return this.contextSupport;
    }

    protected abstract Navigator getNavigator();
    protected abstract Object getDocument(String url) throws Exception;

    public void testGetNodeType() throws FunctionCallException, UnsupportedAxisException
    {
        Navigator nav = getNavigator();
        Object document = nav.getDocument("xml/testNamespaces.xml");
        int count = 0;
        Iterator descendantOrSelfAxisIterator = nav.getDescendantOrSelfAxisIterator(document);
        while (descendantOrSelfAxisIterator.hasNext())
        {
            Object node = descendantOrSelfAxisIterator.next();
            Iterator namespaceAxisIterator = nav.getNamespaceAxisIterator(node);
            while (namespaceAxisIterator.hasNext())
            {
                count++;
                assertEquals("Node type mismatch", Pattern.NAMESPACE_NODE, nav.getNodeType(namespaceAxisIterator.next()));
            }
        }
        assertEquals(25, count);
    }


    /* test for jaxen-24
    */
    public void testJaxen24() throws JaxenException
    {
        Navigator nav = getNavigator();
        String url = "xml/jaxen24.xml";
        log("Document [" + url + "]");
        Object document = nav.getDocument(url);
        XPath contextpath = new BaseXPath("/body/div", nav);
        log("Initial Context :: " + contextpath);
        List list = contextpath.selectNodes(document);
        Iterator iter = list.iterator();
        while (iter.hasNext())
        {
            Object context = iter.next();
            assertCountXPath(1, context, "preceding::*[1]");
            assertValueOfXPath("span", context, "local-name(preceding::*[1])");
        }
    }

    /* jaxen-58
    */
    public void testJaxen58() throws JaxenException
    {
        Navigator nav = getNavigator();
        String url = "xml/jaxen24.xml";
        log("Document [" + url + "]");
        Object document = nav.getDocument(url);
        XPath contextpath = new BaseXPath("/", nav);
        log("Initial Context :: " + contextpath);
        List list = contextpath.selectNodes(document);
        Iterator iter = list.iterator();
        while (iter.hasNext())
        {
            Object context = iter.next();
            assertCountXPath(0, context, "//preceding::x");
            assertCountXPath(0, context, "//following::x");
            assertCountXPath(0, context, "/descendant::*/preceding::x");
            assertCountXPath(0, context, "/descendant::node()/preceding::x");
        }
    }

    /* test for jaxen-3
    */
    public void testJaxen3() throws JaxenException
    {
        Navigator nav = getNavigator();
        String url = "xml/simple.xml";
        log("Document [" + url + "]");
        Object document = nav.getDocument(url);
        XPath contextpath = new BaseXPath("/", nav);
        log("Initial Context :: " + contextpath);
        List list = contextpath.selectNodes(document);
        Iterator iter = list.iterator();
        while (iter.hasNext())
        {
            Object context = iter.next();
            assertValueOfXPath("abd", context, "string()");
        }
    }

    public void testStringFunction1() throws JaxenException
    {
        Navigator nav = getNavigator();
        String url = "xml/simple.xml";
        log("Document [" + url + "]");
        Object document = nav.getDocument(url);
        XPath contextpath = new BaseXPath("/root", nav);
        log("Initial Context :: " + contextpath);
        List list = contextpath.selectNodes(document);
        Iterator iter = list.iterator();
        while (iter.hasNext())
        {
            Object context = iter.next();
            assertValueOfXPath("abd", context, "string()");
        }
    }

    public void testStringFunction2() throws JaxenException
    {
        Navigator nav = getNavigator();
        String url = "xml/simple.xml";
        log("Document [" + url + "]");
        Object document = nav.getDocument(url);
        XPath contextpath = new BaseXPath("/root/a", nav);
        log("Initial Context :: " + contextpath);
        List list = contextpath.selectNodes(document);
        Iterator iter = list.iterator();
        while (iter.hasNext())
        {
            Object context = iter.next();
            assertValueOfXPath("a", context, "string()");
        }
    }

    public void testStringFunction3() throws JaxenException
    {
        Navigator nav = getNavigator();
        String url = "xml/simple.xml";