/*
* Copyright (c) 1998-2008 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 Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.quercus.expr;
import com.caucho.quercus.env.Env;
import com.caucho.quercus.env.StringValue;
import com.caucho.quercus.env.Value;
/**
* Represents a PHP append ('.') expression.
*/
public class AppendExpr extends Expr
{
private final Expr _value;
private AppendExpr _next;
protected AppendExpr(Expr value, AppendExpr next)
{
_value = value;
_next = next;
}
/**
* Returns the value expression.
*/
public Expr getValue()
{
return _value;
}
/**
* Returns the next value in the append chain.
*/
public AppendExpr getNext()
{
return _next;
}
/**
* Returns the next value in the append chain.
*/
void setNext(AppendExpr next)
{
_next = next;
}
/**
* Returns true for a string.
*/
public boolean isString()
{
return true;
}
@Override
public Value eval(Env env)
{
Value value = _value.eval(env);
if (_next != null)
return value.toStringBuilder(env, _next.eval(env));
else
return value.toStringBuilder(env);
/*
for (AppendExpr ptr = _next; ptr != null; ptr = ptr._next) {
Value ptrValue = ptr._value.eval(env);
sb = sb.appendUnicode(ptrValue);
}
*/
}
@Override
public String evalString(Env env)
{
Value value = _value.eval(env);
StringValue sb = value.toStringBuilder(env);
for (AppendExpr ptr = _next; ptr != null; ptr = ptr._next) {
sb = sb.appendUnicode(ptr._value.eval(env));
}
return sb.toString();
}
public String toString()
{
if (_next != null)
return "(" + _value + " . " + _next + ")";
else
return String.valueOf(_value);
}
}