/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.es.parser;
import java.io.IOException;
/**
* Expr is an intermediate form representing an expression.
*/
class SpecialExpr extends Expr {
final static int THIS = 't';
final static int HAS_NEXT = 'm';
final static int NEXT = 'n';
final static int EXCEPTION = 'e';
final static int ARRAY = 'a';
private int code;
private String str;
private Expr expr;
SpecialExpr(Block block, int code)
{
super(block);
if (code == THIS)
block.function.setThis();
this.code = code;
}
SpecialExpr(Block block, int code, String str)
{
super(block);
this.code = code;
this.str = str;
}
SpecialExpr(Block block, int code, Expr expr)
{
super(block);
this.code = code;
this.expr = expr;
}
int getType()
{
switch (code) {
case HAS_NEXT:
return TYPE_BOOLEAN;
case THIS:
case NEXT:
case EXCEPTION:
case ARRAY:
return TYPE_ES;
default:
throw new RuntimeException();
}
}
void printBooleanImpl() throws IOException
{
switch (code) {
case HAS_NEXT:
cl.print(str + ".hasNext()");
break;
default:
throw new RuntimeException();
}
}
void printImpl() throws IOException
{
switch (code) {
case THIS:
cl.print("_this");
break;
case NEXT:
cl.print("((ESBase) " + str + ".next())");
break;
case EXCEPTION:
cl.print("_env.wrap(new ESWrapperException(" + str + "))");
break;
case ARRAY:
cl.print("_env.array(");
expr.print();
cl.print(")");
break;
default:
throw new RuntimeException();
}
}
}