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/* *******************************************************************
 * Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
 * All rights reserved. 
 * This program and the accompanying materials are made available 
 * under the terms of the Eclipse Public License v1.0 
 * which accompanies this distribution and is available at 
 * http://www.eclipse.org/legal/epl-v10.html 
 *  
 * Contributors: 
 *     PARC     initial implementation 
 * ******************************************************************/


package org.aspectj.weaver.patterns;

import java.io.DataOutputStream;
import java.io.IOException;
import java.util.Map;

import org.aspectj.util.FuzzyBoolean;
import org.aspectj.weaver.ISourceContext;
import org.aspectj.weaver.IntMap;
import org.aspectj.weaver.ResolvedType;
import org.aspectj.weaver.Shadow;
import org.aspectj.weaver.VersionedDataInputStream;
import org.aspectj.weaver.World;
import org.aspectj.weaver.ast.Test;

public class AndPointcut extends Pointcut {
	Pointcut left, right;  // exposed for testing

	private int couldMatchKinds;
	
	public AndPointcut(Pointcut left, Pointcut right) {
		super();
		this.left = left;
		this.right = right;
		this.pointcutKind = AND;
		setLocation(left.getSourceContext(), left.getStart(), right.getEnd());
		couldMatchKinds = left.couldMatchKinds() & right.couldMatchKinds();
	}
	
	public int couldMatchKinds() {
		return couldMatchKinds;
	}

	public FuzzyBoolean fastMatch(FastMatchInfo type) {
		return left.fastMatch(type).and(right.fastMatch(type));
	}
	
	protected FuzzyBoolean matchInternal(Shadow shadow) {
		FuzzyBoolean leftMatch = left.match(shadow);
		if (leftMatch.alwaysFalse()) return leftMatch;
		return leftMatch.and(right.match(shadow));
	}
	
	public String toString() {
		return "(" + left.toString() + " && " + right.toString() + ")";
	}
	
	public boolean equals(Object other) { 
		if (!(other instanceof AndPointcut)) return false;
		AndPointcut o = (AndPointcut)other;
		return o.left.equals(left) && o.right.equals(right);
	}
    
    public int hashCode() {
        int result = 19;
        result = 37*result + left.hashCode();
        result = 37*result + right.hashCode();
        return result;
    }

	public void resolveBindings(IScope scope, Bindings bindings) {
		left.resolveBindings(scope, bindings);
		right.resolveBindings(scope, bindings);
	}

	public void write(DataOutputStream s) throws IOException {
		s.writeByte(Pointcut.AND);
		left.write(s);
		right.write(s);
		writeLocation(s);
	}
	
	public static Pointcut read(VersionedDataInputStream s, ISourceContext context) throws IOException {
		AndPointcut ret = new AndPointcut(Pointcut.read(s, context), Pointcut.read(s, context));
		ret.readLocation(context, s);
		return ret;
	}


	protected Test findResidueInternal(Shadow shadow, ExposedState state) {
		return Test.makeAnd(left.findResidue(shadow, state), right.findResidue(shadow, state));
	}

	public Pointcut concretize1(ResolvedType inAspect, ResolvedType declaringType, IntMap bindings) {
		AndPointcut ret =  new AndPointcut(left.concretize(inAspect, declaringType, bindings),
										   right.concretize(inAspect, declaringType, bindings));
		ret.copyLocationFrom(this);
		return ret;
	}
	
	public Pointcut parameterizeWith(Map typeVariableMap,World w) {
		AndPointcut ret =  new AndPointcut(left.parameterizeWith(typeVariableMap,w),
				   						    right.parameterizeWith(typeVariableMap,w));
		ret.copyLocationFrom(this);
		return ret;
	}

	public Pointcut getLeft() {
		return left;
	}

	public Pointcut getRight() {
		return right;
	}

    public Object accept(PatternNodeVisitor visitor, Object data) {
        return visitor.visit(this, data);
    }
	
	public Object traverse(PatternNodeVisitor visitor, Object data) {
		Object ret = accept(visitor,data);
		left.traverse(visitor,ret);
		right.traverse(visitor,ret);
		return ret;
	}
}