MemberVariableNode.java :  » Web-Framework » anvil » anvil » script » expression » Java Open Source

/*
 * $Id: MemberVariableNode.java,v 1.19 2002/09/16 08:05:05 jkl Exp $
 *
 * Copyright (c) 2002 Njet Communications Ltd. All Rights Reserved.
 *
 * Use is subject to license terms, as defined in
 * Anvil Sofware License, Version 1.1. See LICENSE 
 * file, or http://njet.org/license-1.1.txt
 */
package anvil.script.expression;

import anvil.core.Any;
import anvil.core.AnyClass;
import anvil.ErrorListener;
import anvil.script.ClassType;
import anvil.codec.Code;
import anvil.codec.ConstantPool;
import anvil.script.compiler.ByteCompiler;
import anvil.script.Context;
import anvil.script.Type;
import anvil.script.MemberVariableType;
import java.io.IOException;

/**
 * class MemberVariableNode
 *
 * @author: Jani Lehtimki
 */
public class MemberVariableNode extends Node
{

  protected ClassType _target;
  protected ClassType _context;
  protected MemberVariableType _member;



  public MemberVariableNode(ClassType context, MemberVariableType member) 
  {
    this(member.getClassType(), context, member);
  }
  

  public MemberVariableNode(ClassType target, ClassType context, MemberVariableType member) 
  {
    super();
    _target = target;
    _context = context;
    _member = member;
  }
  
  
  public int typeOf() 
  {
    return Node.EXPR_VARIABLE;
  }


  public boolean isConstant() 
  {
    return false;
  }

  
  public Node optimize() 
  {
    return this;
  }


  public void compile(ByteCompiler context, Node child)
  {
    Code code = context.getCode();
    ConstantPool pool = code.getPool();
    context.accessInstance(_context, _target);
    child.compile(context, GET);
    code.dup_x1();
    code.putfield(_member.getTypeRef(pool));
  }


  public void compile(ByteCompiler context, int operation)
  {
    Code code = context.getCode();
    ConstantPool pool = code.getPool();
    switch(operation) {
    case GET:
      context.accessInstance(_context, _target);
      code.getfield(_member.getTypeRef(pool));
      break;

    case GET_BOOLEAN:
      context.accessInstance(_context, _target);
      code.getfield(_member.getTypeRef(pool));
      context.any2boolean();
      break;

    case CHECK:
      context.accessInstance(_context, _target);
      code.getfield(_member.getTypeRef(pool));
      break;

    case DELETE:
      code.iconst(false);
      break;
    }
   
  }

}