src/org/apache/osgi/framework/util/ldap/Operator.java

/*
 *   Copyright 2005 The Apache Software Foundation
 *
 *   Licensed 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.osgi.framework.util.ldap;

import java.util.Stack;

public abstract class Operator
{
    public abstract void execute(Stack operands, Mapper mapper)
        throws EvaluationException;

    public abstract String toString();

    public abstract void buildTree(Stack operands); // re-build the parsetree
    public abstract void toStringInfix(StringBuffer b); // convert to canonical string

    // Place to store the reconstructed parsetree
    // Vector -> ArrayList is using jdk1.2 or later
    public Operator[] children = null;
}