/*
* $Id: StringBufferNode.java,v 1.5 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.codec.Code;
import anvil.codec.ConstantPool;
import anvil.script.compiler.ByteCompiler;
import anvil.script.Context;
import java.io.IOException;
/**
* class StringBufferNode
*
* @author: Jani Lehtim�ki
*/
public class StringBufferNode extends MultiParent
{
public StringBufferNode(Parent elements)
{
super(elements);
}
public int typeOf()
{
return Node.EXPR_STRING_BUFFER;
}
public Any eval()
{
StringBuffer buffer = new StringBuffer();
int n = childs();
for(int i=0; i<n; i++) {
buffer.append(getChild(i).eval());
}
return Any.create(buffer.toString());
}
public void compile(ByteCompiler context, int operation)
{
Code code = context.getCode();
ConstantPool pool = code.getPool();
int clazz = pool.addClass("java/lang/StringBuffer");
int appendmethod = pool.addMethodRef(clazz, "append",
"(Ljava/lang/Object;)Ljava/lang/StringBuffer;");
code.anew(clazz);
code.dup();
code.invokespecial(pool.addMethodRef(clazz, "<init>", "()V"));
int n = childs();
for(int i=0; i<n; i++) {
getChild(i).compile(context, GET);
code.invokevirtual(appendmethod);
}
code.invokevirtual(code.getPool().addMethodRef(context.TYPE_OBJECT,
"toString", "()Ljava/lang/String;"));
code.invokestatic(code.getPool().addMethodRef(context.TYPE_ANY,
"create", "(Ljava/lang/String;)Lanvil/core/Any;"));
if (operation == GET_BOOLEAN) {
context.any2boolean();
}
}
}