org.sca4j.fabric.policy.infoset.DefaultPolicySetEvaluator Maven / Gradle / Ivy
/**
* SCA4J
* Copyright (c) 2009 - 2099 Service Symphony Ltd
*
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* is included in this distrubtion or you may obtain a copy at
*
* http://www.opensource.org/licenses/apache2.0.php
*
* Unless required by applicable law or agreed to in writing, software distributed
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* CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*
* This project contains code licensed from the Apache Software Foundation under
* the Apache License, Version 2.0 and original code from project contributors.
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*
* Original Codehaus Header
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* Copyright (c) 2007 - 2008 fabric3 project contributors
*
* Licensed to you under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. A copy of the license
* is included in this distrubtion or you may obtain a copy at
*
* http://www.opensource.org/licenses/apache2.0.php
*
* 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.
*
* This project contains code licensed from the Apache Software Foundation under
* the Apache License, Version 2.0 and original code from project contributors.
*
* Original Apache Header
*
* Copyright (c) 2005 - 2006 The Apache Software Foundation
*
* Apache Tuscany is an effort undergoing incubation at The Apache Software
* Foundation (ASF), sponsored by the Apache Web Services PMC. Incubation is
* required of all newly accepted projects until a further review indicates that
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*
* This product includes software developed by
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*/
package org.sca4j.fabric.policy.infoset;
import javax.xml.namespace.QName;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import javax.xml.xpath.XPathVariableResolver;
import org.w3c.dom.Element;
/**
* @version $Revision$ $Date$
*/
public class DefaultPolicySetEvaluator implements PolicySetEvaluator {
private static final XPathFactory XPATH_FACTORY = XPathFactory.newInstance();
public boolean doesApply(Element target, String appliesToXPath, final String operation) {
try {
XPath xpath = XPATH_FACTORY.newXPath();
xpath.setXPathVariableResolver(new XPathVariableResolver() {
public Object resolveVariable(QName variable) {
if ("Operation".equals(variable.getLocalPart())) {
return operation;
} else {
throw new AssertionError("Unexpected variable name " + variable);
}
}
});
Boolean ret = (Boolean) xpath.evaluate(appliesToXPath, target, XPathConstants.BOOLEAN);
return ret.booleanValue();
} catch (XPathExpressionException ex) {
throw new AssertionError(ex);
}
}
}