/*
* 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.Location;
import com.caucho.quercus.env.Env;
import com.caucho.quercus.env.Value;
/**
* Represents a PHP field reference.
*/
public class FieldVarGetExpr extends AbstractVarExpr {
protected final Expr _objExpr;
protected final Expr _nameExpr;
public FieldVarGetExpr(Location location, Expr objExpr, Expr nameExpr)
{
super(location);
_objExpr = objExpr;
_nameExpr = nameExpr;
}
public FieldVarGetExpr(Expr objExpr, Expr nameExpr)
{
_objExpr = objExpr;
_nameExpr = nameExpr;
}
/**
* Evaluates the expression.
*
* @param env the calling environment.
*
* @return the expression value.
*/
@Override
public Value evalArg(Env env, boolean isTop)
{
Value value = _objExpr.evalArg(env, false);
// XXX: getFieldArg(isTop)
return value.getFieldArg(env, _nameExpr.evalStringValue(env), isTop);
}
/**
* Evaluates the expression.
*
* @param env the calling environment.
*
* @return the expression value.
*/
public Value evalRef(Env env)
{
// quercus/0d1k
Value value = _objExpr.evalObject(env);
return value.getFieldRef(env, _nameExpr.evalStringValue(env));
}
/**
* Evaluates the expression.
*
* @param env the calling environment.
*
* @return the expression value.
*/
public Value eval(Env env)
{
Value obj = _objExpr.eval(env);
return obj.getField(env, _nameExpr.evalStringValue(env));
}
/**
* Evaluates the expression.
*
* @param env the calling environment.
*
* @return the expression value.
*/
public void evalAssign(Env env, Value value)
{
Value obj = _objExpr.evalObject(env);
obj.putField(env, _nameExpr.evalStringValue(env), value);
}
/**
* Evaluates the expression, creating an array if the field is unset.
*
* @param env the calling environment.
*
* @return the expression value.
*/
public Value evalArray(Env env)
{
Value obj = _objExpr.evalObject(env);
return obj.getFieldArray(env, _nameExpr.evalStringValue(env));
}
/**
* Evaluates the expression, creating an object if the field is unset.
*
* @param env the calling environment.
*
* @return the expression value.
*/
public Value evalObject(Env env)
{
Value obj = _objExpr.evalObject(env);
return obj.getFieldObject(env, _nameExpr.evalStringValue(env));
}
/**
* Evaluates the expression.
*
* @param env the calling environment.
*
* @return the expression value.
*/
public void evalUnset(Env env)
{
Value obj = _objExpr.eval(env);
obj.unsetField(_nameExpr.evalStringValue(env));
}
public String toString()
{
return _objExpr + "->{" + _nameExpr + "}";
}
}