BlockEvaluator.java

package com.drawbridge.jsengine.ast;

import java.util.LinkedList;
import java.util.List;

import com.drawbridge.jsengine.Scope;
import com.drawbridge.jsengine.jsobjects.ExecutionException;
import com.drawbridge.jsengine.jsobjects.JSType;
import com.google.caja.parser.js.Block;
import com.google.caja.parser.js.Statement;

/**
 * 
 * A group of statements executed serially
 * (except that FunctionDeclarations are hoisted).
 *
 * @author ags46
 *
 */
public class BlockEvaluator extends Evaluator{
	
	private List<? extends Statement> statements;

	public BlockEvaluator(Evaluator parent, Scope scope, Block block) {
		super(parent,scope, block.getFilePosition());
		statements = block.children();
		
		for(Statement sta : statements){
			mChildren.add(Evaluator.getEvaluator(this, mScope, sta));
		}
	}

	@Override
	public JSType evaluate() throws EvaluatorException, ExecutionException {
		for(Evaluator stEval : mChildren){
			if(stEval instanceof ReturnStmtEvaluator){
				return stEval.evaluate();
			}
			else{
				stEval.evaluate();
			}
		}
		
		return null;
	}



	@Override
	public LinkedList<com.drawbridge.vl.blocks.Block> getBlocks()
	{
		LinkedList<com.drawbridge.vl.blocks.Block> results = new LinkedList<com.drawbridge.vl.blocks.Block>();
		for(Evaluator eval: mChildren){
			LinkedList<com.drawbridge.vl.blocks.Block> subresult = eval.getBlocks();
			results.addAll(subresult);
		}
		return results;
	}


}