/*
* $Id: AttributeNode.java,v 1.9 2002/09/16 08:05:04 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.codec.Code;
import anvil.script.compiler.ByteCompiler;
import anvil.script.Context;
import java.io.IOException;
/**
* class AttributeNode
*
* @author: Jani Lehtim�ki
*/
public class AttributeNode extends UnaryParent
{
private String _attribute;
public AttributeNode(Node self, String attribute)
{
super(self);
_attribute = attribute;
}
public String getAttribute()
{
return _attribute;
}
public int typeOf()
{
return EXPR_ATTRIBUTE;
}
public boolean isConstant()
{
return false;
}
public Node optimize()
{
optimizeChilds();
return this;
}
public void compile(ByteCompiler context, int operation)
{
Code code = context.getCode();
switch(operation) {
case GET:
_child.compile(context, GET);
code.aload_first();
code.astring(_attribute);
code.invokevirtual(code.getPool().addMethodRef(context.TYPE_ANY, "getAttribute",
"(Lanvil/script/Context;Ljava/lang/String;)Lanvil/core/Any;"));
break;
case GET_BOOLEAN:
_child.compile(context, GET);
code.aload_first();
code.astring(_attribute);
code.invokevirtual(code.getPool().addMethodRef(context.TYPE_ANY, "getAttribute",
"(Lanvil/script/Context;Ljava/lang/String;)Lanvil/core/Any;"));
context.any2boolean();
break;
case CHECK:
_child.compile(context, GET);
code.aload_first();
code.astring(_attribute);
code.invokevirtual(code.getPool().addMethodRef(context.TYPE_ANY, "checkAttribute",
"(Lanvil/script/Context;Ljava/lang/String;)Lanvil/core/Any;"));
break;
case DELETE:
_child.compile(context, GET);
code.aload_first();
code.astring(_attribute);
code.invokevirtual(code.getPool().addMethodRef(context.TYPE_ANY, "deleteAttribute",
"(Lanvil/script/Context;Ljava/lang/String;)Z"));
break;
}
}
}