Operation.java

 /*
  * RHQ Management Platform
  * Copyright (C) 2005-2008 Red Hat, Inc.
  * All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License, version 2, as
  * published by the Free Software Foundation, and/or the GNU Lesser
  * General Public License, version 2.1, also as published by the Free
  * Software Foundation.
  *
  * 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 and the GNU Lesser General Public License
  * for more details.
  *
  * You should have received a copy of the GNU General Public License
  * and the GNU Lesser 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.
  */
package org.rhq.core.system.pquery;

import org.rhq.core.system.pquery.Conditional.Operator;

class Operation {
    private final Operator operator;

    Operation(Operator operator) {
        this.operator = operator;
    }

    Operator getOperator() {
        return operator;
    }

    boolean doOperation(String value1, String value2) {
        if ((value1 == null) || (value2 == null)) {
            return value1 == value2;
        }

        if (operator.equals(Operator.match)) {
            return value1.matches(value2);
        } else if (operator.equals(Operator.nomatch)) {
            return !value1.matches(value2);
        } else {
            // should never happen unless we add more operators but forgot to create a new else clause for it
            throw new IllegalArgumentException("Invalid operator: " + operator);
        }
    }
}