operator_and.java

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/**
 * Decorator Pattern
 */
package cn.edu.nju.software.ruse;

import java.io.File;
import java.util.HashSet;
import java.util.Map;

/**
 * @author spring
 *
 */
public class Operator_AND extends Operator {

	/* (non-Javadoc)
	 * @see main.Operand#getPRI()
	 */

	public Operator_AND() {
		desription = "AND";
		PRI = PRI_AND;
	}
	public int getPRI() {
		return PRI;
	}

	public HashSet<File> and(HashSet<File> x1, HashSet<File> x2) {
//System.err.println("@Operator_AND Doing the AND operator.");
		
		x1.retainAll(x2);
		return x1;
	}
//	public Operator createOperator(String operator) {
//		if(operator.equals(desription))
//			return new Operator_AND();
//		else {
//			System.err.println("@Operator_AND The Operator is undefined.");
//			return null;
//		}
//	}

}