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/*
* 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.tuscany.sca.common.xml.xpath;
import javax.xml.stream.XMLStreamReader;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import org.apache.tuscany.sca.common.xml.dom.DOMHelper;
import org.apache.tuscany.sca.common.xml.stax.StAXHelper;
import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
*
*/
public class XPathHelperTestCase {
private static XPathHelper xpathHelper;
private static StAXHelper staxHelper;
private static DOMHelper domHelper;
private static String XML =
"<r:root name=\"root\" xmlns:r=\"http://root\">" + "<c:child xmlns:c=\"http://child\" name=\"child\">"
+ "<c:child1 xmlns:c=\"http://child1\" name=\"child1\"/>"
+ "</c:child>"
+ "</r:root>";
private static String XPATH =
"<policySet attachTo=\"//c:child1[@name='child1']/self::node()\" xmlns:c=\"http://child1\" xmlns=\"http://p\">" + "<child xmlns:c=\"http://c2\"/></policySet>";
/**
* @throws java.lang.Exception
*/
@BeforeClass
public static void setUpBeforeClass() throws Exception {
ExtensionPointRegistry registry = new DefaultExtensionPointRegistry();
xpathHelper = XPathHelper.getInstance(registry);
domHelper = DOMHelper.getInstance(registry);
staxHelper = StAXHelper.getInstance(registry);
}
@Test
public void testNewXPath() {
XPath path = xpathHelper.newXPath();
Assert.assertNotNull(path);
}
@Test
public void testCompile() throws Exception {
XMLStreamReader reader = staxHelper.createXMLStreamReader(XPATH);
reader.nextTag();
String xpath = reader.getAttributeValue(null, "attachTo");
XPathExpression expression = xpathHelper.compile(reader.getNamespaceContext(), xpath);
// Advance the reader so that the namespace context changes its prefix/namespace mapping
reader.nextTag();
reader.close();
Document doc = domHelper.load(XML);
NodeList nodes = (NodeList)expression.evaluate(doc, XPathConstants.NODESET);
Assert.assertEquals(1, nodes.getLength());
Node node = nodes.item(0);
Assert.assertTrue(node instanceof Element);
Assert.assertEquals(node.getNodeName(), "c:child1");
}
@Test
public void testCompile2() throws Exception {
XMLStreamReader reader = staxHelper.createXMLStreamReader(XPATH);
reader.nextTag();
String xpathExp = reader.getAttributeValue(null, "attachTo");
XPath xpath = xpathHelper.newXPath();
// Compile the expression without taking a snapshot of the namespace context
XPathExpression expression = xpathHelper.compile(xpath, reader.getNamespaceContext(), xpathExp);
// Advance the reader so that the namespace context changes its prefix/namespace mapping
reader.nextTag();
reader.close();
Document doc = domHelper.load(XML);
NodeList nodes = (NodeList)expression.evaluate(doc, XPathConstants.NODESET);
Assert.assertEquals(1, nodes.getLength());
Node node = nodes.item(0);
Assert.assertTrue(node instanceof Element);
Assert.assertEquals(node.getNodeName(), "c:child1");
}
/**
* @throws java.lang.Exception
*/
@AfterClass
public static void tearDownAfterClass() throws Exception {
xpathHelper = null;
}
}
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