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/*
 * All content copyright Terracotta, Inc., unless otherwise indicated. All rights reserved.
 * 
 * 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.quartz.impl.matchers;

import org.quartz.Matcher;
import org.quartz.utils.Key;

/**
 * Matches using an OR operator on two Matcher operands. 
 *  
 * @author jhouse
 */
public class OrMatcher> implements Matcher {
  
    private static final long serialVersionUID = -2867392824539403712L;

    protected Matcher leftOperand;
    protected Matcher rightOperand;
    
    protected OrMatcher(Matcher leftOperand, Matcher rightOperand) {
        if(leftOperand == null || rightOperand == null)
            throw new IllegalArgumentException("Two non-null operands required!");
        
        this.leftOperand = leftOperand;
        this.rightOperand = rightOperand;
    }
    
    /**
     * Create an OrMatcher that depends upon the result of at least one of the given matchers.
     */
    public static > OrMatcher or(Matcher leftOperand, Matcher rightOperand) {
        return new OrMatcher(leftOperand, rightOperand);
    }

    public boolean isMatch(T key) {

        return leftOperand.isMatch(key) || rightOperand.isMatch(key);
    }

    public Matcher getLeftOperand() {
        return leftOperand;
    }

    public Matcher getRightOperand() {
        return rightOperand;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result
                + ((leftOperand == null) ? 0 : leftOperand.hashCode());
        result = prime * result
                + ((rightOperand == null) ? 0 : rightOperand.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        OrMatcher other = (OrMatcher) obj;
        if (leftOperand == null) {
            if (other.leftOperand != null)
                return false;
        } else if (!leftOperand.equals(other.leftOperand))
            return false;
        if (rightOperand == null) {
            if (other.rightOperand != null)
                return false;
        } else if (!rightOperand.equals(other.rightOperand))
            return false;
        return true;
    }

}