/**
*
* 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.camel.builder.xml;
import org.apache.camel.CamelContext;
import org.apache.camel.Exchange;
import org.apache.camel.Expression;
import org.apache.camel.Message;
import org.apache.camel.Predicate;
import org.apache.camel.TestSupport;
import static org.apache.camel.builder.xml.XPathBuilder.*;
import org.apache.camel.builder.xml.XPathBuilder;
import org.apache.camel.impl.DefaultCamelContext;
import org.apache.camel.impl.DefaultExchange;
import javax.xml.xpath.XPathFunctionResolver;
/**
* @version $Revision: 534495 $
*/
public class XPathTest extends TestSupport {
public void testXPathExpressions() throws Exception {
assertExpression("/foo/bar/@xyz", "<foo><bar xyz='cheese'/></foo>", "cheese");
assertExpression("$name", "<foo><bar xyz='cheese'/></foo>", "James");
assertExpression("foo/bar", "<foo><bar>cheese</bar></foo>", "cheese");
assertExpression("foo/bar/text()", "<foo><bar>cheese</bar></foo>", "cheese");
}
public void testXPathPredicates() throws Exception {
assertPredicate("/foo/bar/@xyz", "<foo><bar xyz='cheese'/></foo>", true);
assertPredicate("$name = 'James'", "<foo><bar xyz='cheese'/></foo>", true);
assertPredicate("$name = 'Hiram'", "<foo><bar xyz='cheese'/></foo>", false);
assertPredicate("/foo/notExist", "<foo><bar xyz='cheese'/></foo>", false);
}
public void testXPathWithCustomVariable() throws Exception {
assertExpression(xpath("$name").variable("name", "Hiram"), "<foo/>", "Hiram");
}
public void testUsingJavaExtensions() throws Exception {
Object instance = null;
// we may not have Xalan on the classpath
try {
instance = Class.forName("org.apache.xalan.extensions.XPathFunctionResolverImpl").newInstance();
}
catch (Throwable e) {
log.debug("Could not find Xalan on the classpath so ignoring this test case: " + e);
}
if (instance instanceof XPathFunctionResolver) {
XPathFunctionResolver functionResolver = (XPathFunctionResolver) instance;
XPathBuilder builder = xpath("java:"
+ getClass().getName() + ".func(string(/header/value))")
.namespace("java", "http://xml.apache.org/xalan/java")
.functionResolver(functionResolver);
String xml = "<header><value>12</value></header>";
Object value = assertExpression(builder, xml, "modified12");
log.debug("Evaluated xpath: " + builder.getText() + " on XML: " + xml + " result: " + value);
}
}
public static String func(String s) {
return "modified" + s;
}
protected Object assertExpression(String xpath, String xml, String expected) {
Expression expression = XPathBuilder.xpath(xpath);
return assertExpression(expression, xml, expected);
}
protected Object assertExpression(Expression expression, String xml, String expected) {
return assertExpression(expression, createExchange(xml), expected);
}
protected void assertPredicate(String xpath, String xml, boolean expected) {
Predicate predicate = XPathBuilder.xpath(xpath);
assertPredicate(predicate, createExchange(xml), expected);
}
protected Exchange createExchange(String xml) {
CamelContext context = new DefaultCamelContext();
Exchange exchange = new DefaultExchange(context);
Message message = exchange.getIn();
message.setHeader("name", "James");
message.setBody(xml);
return exchange;
}
}