/*
* 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 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;
import com.caucho.quercus.env.Var;
/**
* Represents a PHP array reference expression.
*/
public class ArrayGetExpr extends AbstractVarExpr {
protected final Expr _expr;
protected final Expr _index;
public ArrayGetExpr(Location location, Expr expr, Expr index)
{
super(location);
_expr = expr;
_index = index;
}
public ArrayGetExpr(Expr expr, Expr index)
{
_expr = expr;
_index = index;
}
/**
* Returns the expr.
*/
public Expr getExpr()
{
return _expr;
}
/**
* Returns the index.
*/
public Expr getIndex()
{
return _index;
}
/**
* Evaluates the expression.
*
* @param env the calling environment.
*
* @return the expression value.
*/
@Override
public Value eval(Env env)
{
Value array = _expr.eval(env);
Value index = _index.eval(env);
return array.get(index);
}
/**
* Evaluates the expression as a copyable result.
*
* @param env the calling environment.
*
* @return the expression value.
*/
@Override
public Value evalCopy(Env env)
{
Value array = _expr.eval(env);
Value index = _index.eval(env);
return array.get(index).copy();
}
/**
* Evaluates the expression, creating an array if the value is unset..
*
* @param env the calling environment.
*
* @return the expression value.
*/
@Override
public Value evalArray(Env env)
{
Value array = _expr.evalArray(env);
Value index = _index.eval(env);
return array.getArray(index);
}
/**
* Evaluates the expression, marking as dirty.
*
* @param env the calling environment.
*
* @return the expression value.
*/
@Override
public Value evalDirty(Env env)
{
Value array = _expr.eval(env);
Value index = _index.eval(env);
return array.getDirty(index);
}
/**
* Evaluates the expression, creating an object if the value is unset.
*
* @param env the calling environment.
*
* @return the expression value.
*/
@Override
public Value evalObject(Env env)
{
Value array = _expr.evalArray(env);
Value index = _index.eval(env);
return array.getObject(env, index);
}
/**
* Evaluates the expression.
*
* @param env the calling environment.
*
* @return the expression value.
*/
@Override
public Value evalArg(Env env, boolean isTop)
{
Value value = _expr.evalArg(env, false); // php/0d2t
return value.getArg(_index.eval(env), isTop);
}
/**
* Evaluates the expression.
*
* @param env the calling environment.
*
* @return the expression value.
*/
@Override
public Var evalVar(Env env)
{
Value value = _expr.evalArray(env);
return value.getVar(_index.eval(env));
}
/**
* Evaluates the expression.
*
* @param env the calling environment.
*
* @return the expression value.
*/
@Override
public Value evalAssignValue(Env env, Value value)
{
// php/03mk, php/04b3
Value array = _expr.evalArray(env);
/*
array.put(_index.eval(env), value);
return array.get(_index.eval(env)); // php/03mm php/03mn
*/
return array.put(_index.eval(env), value);
}
/**
* Evaluates the expression.
*
* @param env the calling environment.
*
* @return the expression value.
*/
@Override
public Value evalAssignRef(Env env, Value value)
{
// php/03mk
Value array = _expr.evalArray(env);
return array.put(_index.eval(env), value);
}
/**
* Evaluates the expression as an isset().
*/
@Override
public boolean evalIsset(Env env)
{
Value array = _expr.eval(env);
Value index = _index.eval(env);
return array.isset(index);
}
/**
* Evaluates the expression.
*
* @param env the calling environment.
*
* @return the expression value.
*/
@Override
public void evalUnset(Env env)
{
Value index = _index.eval(env);
_expr.evalUnsetArray(env, index);
}
@Override
public String toString()
{
return _expr + "[" + _index + "]";
}
}