FunctionDeclarationEvaluator.java

package com.drawbridge.jsengine.ast;

import java.util.LinkedList;

import com.drawbridge.jsengine.JsEngine;
import com.drawbridge.jsengine.Scope;
import com.drawbridge.jsengine.SymbolTableEntry;
import com.drawbridge.jsengine.jsobjects.JSFunction;
import com.drawbridge.jsengine.jsobjects.JSType;
import com.drawbridge.vl.blocks.Block;
import com.drawbridge.vl.blocks.BlockFunctionDefinition;
import com.google.caja.parser.js.FunctionConstructor;
import com.google.caja.parser.js.FunctionDeclaration;

public class FunctionDeclarationEvaluator extends Evaluator
{
	FunctionConstructor fc;
	//As far as we  know, this just consists of a FunctionConstructor
	
	public FunctionDeclarationEvaluator(Evaluator parent, Scope scope, FunctionDeclaration functionDeclaration) {
		super(parent, scope, functionDeclaration.getFilePosition());
		fc = (FunctionConstructor) functionDeclaration.children().get(1);
		this.mChildren.add(Evaluator.getEvaluator(this, scope, fc));
	}

	@Override
	public JSType evaluate() throws EvaluatorException
	{
		mScope.declareVariable(null, fc.getIdentifierName(), 
				new SymbolTableEntry(new JSFunction((FunctionConstructorEvaluator) Evaluator.getEvaluator(this, new Scope(JsEngine.getInstance(), mScope), fc))));
		
		return null;
	}

	@Override
	public LinkedList<com.drawbridge.vl.blocks.Block> getBlocks()
	{
		LinkedList<Block> result = new LinkedList<Block>();
		result.add(new BlockFunctionDefinition(fc.getFilePosition(), this, fc.getIdentifierName()));
		LinkedList<Block> subresults = mChildren.get(0).getBlocks();
		if(subresults != null)
			result.addAll(subresults);
		return result;
	}

}