IdentifierEvaluator.java

package com.drawbridge.jsengine.ast;

import java.util.LinkedList;

import com.drawbridge.jsengine.Scope;
import com.drawbridge.jsengine.SymbolTable.SymbolTableException;
import com.drawbridge.jsengine.jsobjects.JSType;
import com.drawbridge.utils.Utils;
import com.drawbridge.vl.blocks.BlockIdentifier;
import com.google.caja.parser.js.Identifier;

public class IdentifierEvaluator extends Evaluator
{

	String	name;

	public IdentifierEvaluator(Evaluator parent, Scope scope, Identifier identifier) {
		super(parent, scope, identifier.getFilePosition());
		name = identifier.getName();

		Utils.out.println(this.getClass(), "I'm an identifier (named " +
				identifier.getName() + " evaluator and I don't know what to do!");

	}

	@Override
	public JSType evaluate() throws EvaluatorException
	{
		try
		{
			return mScope.getSymbolTable().get(name).getVariable();
		} catch (SymbolTableException e)
		{
			throw new EvaluatorException("IdentifierEvaluator exception: " + e.getMessage());
		}
	}

	@Override
	public LinkedList<com.drawbridge.vl.blocks.Block> getBlocks()
	{
		LinkedList<com.drawbridge.vl.blocks.Block> results = new LinkedList<com.drawbridge.vl.blocks.Block>();
		BlockIdentifier ib = new BlockIdentifier(getFilePosition(), this, name);
		results.add(ib);
		return results;
	}

	@Override
	public boolean compare(Evaluator e)
	{
		if (!e.getClass().equals(getClass()))
			return false;
		IdentifierEvaluator ie = (IdentifierEvaluator) e;
		if (name.equals(ie.name) && e.getFilePosition().equals(getFilePosition()))
			return true;
		else
			return false;
	}

}