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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cmscore.policy;
import com.netscape.certsrv.base.*;
import com.netscape.certsrv.policy.*;
import com.netscape.certsrv.request.IRequest;
/**
* This class represents an Or expression of the form
* (var1 op val1 OR var2 op val2).
*
* Expressions are used as predicates for policy selection.
*
* @author kanda
* @version $Revision$, $Date$
*/
public class OrExpression implements IExpression {
private IExpression mExp1;
private IExpression mExp2;
public OrExpression(IExpression exp1, IExpression exp2) {
mExp1 = exp1;
mExp2 = exp2;
}
public boolean evaluate(IRequest req)
throws EPolicyException {
if (mExp1 == null && mExp2 == null)
return true;
else if (mExp1 != null && mExp2 != null)
return mExp1.evaluate(req) || mExp2.evaluate(req);
else if (mExp1 != null && mExp2 == null)
return mExp1.evaluate(req);
else // (mExp1 == null && mExp2 != null)
return mExp2.evaluate(req);
}
public String toString() {
if (mExp1 == null && mExp2 == null)
return "";
else if (mExp1 != null && mExp2 != null)
return mExp1.toString() + " OR " + mExp2.toString();
else if (mExp1 != null && mExp2 == null)
return mExp1.toString();
else // (mExp1 == null && mExp2 != null)
return mExp2.toString();
}
}
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