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/*
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* This program is a part of the IoTa Project.
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*
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* Copyright © 2011-2012 Université de Caen Basse-Normandie, GREYC
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* Copyright © 2011 Orange Labs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* <http://www.gnu.org/licenses/>
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*
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* See AUTHORS for a list of contributors.
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*/
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package fr.unicaen.iota.xacml.policy.function;
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import com.sun.xacml.EvaluationCtx;
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import com.sun.xacml.attr.AttributeValue;
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import com.sun.xacml.attr.BooleanAttribute;
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import com.sun.xacml.attr.StringAttribute;
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import com.sun.xacml.cond.EvaluationResult;
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import com.sun.xacml.cond.FunctionBase;
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import java.util.List;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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public class RevertRegexpMatch extends FunctionBase {
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// the name of the function, which will be used publicly
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public static final String NAME = "urn:unicaen:xacml:1.0:function:revert-regexp-string-match";
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// the parameter types, in order, and whether or not they're bags
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private static final String params[] = {StringAttribute.identifier, StringAttribute.identifier};
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private static final boolean bagParams[] = {false, false};
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private static final Log log = LogFactory.getLog(RevertRegexpMatch.class);
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public RevertRegexpMatch() {
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// use the constructor that handles mixed argument types
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super(NAME, 0, params, bagParams, BooleanAttribute.identifier, false);
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}
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@Override
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public EvaluationResult evaluate(List inputs, EvaluationCtx context) {
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// Evaluate the arguments using the helper method...this will
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// catch any errors, and return values that can be compared
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AttributeValue[] argValues = new AttributeValue[inputs.size()];
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EvaluationResult result = evalArgs(inputs, context, argValues);
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if (result != null) {
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return result;
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}
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// cast the resolved values into specific types
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StringAttribute query = (StringAttribute) (argValues[0]);
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StringAttribute policyValue = (StringAttribute) (argValues[1]);
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log.debug("QUERY: " + query);
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log.debug("POLICY VALUE: " + policyValue);
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boolean evalResult;
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// now compare the values
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evalResult = query.getValue().matches(policyValue.getValue());
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log.debug("result: " + evalResult);
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// boolean returns are common, so there's a getInstance() for that
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return EvaluationResult.getInstance(evalResult);
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}
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}
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