/*
* 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.statement;
import com.caucho.quercus.Location;
import com.caucho.quercus.QuercusDieException;
import com.caucho.quercus.QuercusException;
import com.caucho.quercus.QuercusExitException;
import com.caucho.quercus.env.Env;
import com.caucho.quercus.env.NullValue;
import com.caucho.quercus.env.QuercusLanguageException;
import com.caucho.quercus.env.Value;
import com.caucho.quercus.expr.AbstractVarExpr;
import java.util.ArrayList;
/**
* Represents sequence of statements.
*/
public class TryStatement extends Statement {
protected final Statement _block;
protected final ArrayList<Catch> _catchList = new ArrayList<Catch>();
public TryStatement(Location location, Statement block)
{
super(location);
_block = block;
block.setParent(this);
}
public void addCatch(String id, AbstractVarExpr lhs, Statement block)
{
_catchList.add(new Catch(id, lhs, block));
block.setParent(this);
}
public Value execute(Env env)
{
try {
return _block.execute(env);
} catch (QuercusLanguageException e) {
Value value = e.getValue();
for (int i = 0; i < _catchList.size(); i++) {
Catch item = _catchList.get(i);
if (value != null && value.isA(item.getId()) ||
item.getId().equals("Exception")) {
if (value != null)
item.getExpr().evalAssign(env, value);
else
item.getExpr().evalAssign(env, NullValue.NULL);
return item.getBlock().execute(env);
}
}
throw e;
} catch (QuercusDieException e) {
for (int i = 0; i < _catchList.size(); i++) {
Catch item = _catchList.get(i);
if (item.getId().equals("QuercusDieException")) {
item.getExpr().evalAssign(env, env.createException(e));
return item.getBlock().execute(env);
}
}
throw e;
} catch (QuercusExitException e) {
for (int i = 0; i < _catchList.size(); i++) {
Catch item = _catchList.get(i);
if (item.getId().equals("QuercusExitException")) {
item.getExpr().evalAssign(env, env.createException(e));
return item.getBlock().execute(env);
}
}
throw e;
} catch (Exception e) {
for (int i = 0; i < _catchList.size(); i++) {
Catch item = _catchList.get(i);
if (item.getId().equals("Exception")) {
item.getExpr().evalAssign(env, env.createException(e));
return item.getBlock().execute(env);
}
}
throw new QuercusException(e);
}
}
public static class Catch {
private final String _id;
private final AbstractVarExpr _lhs;
private final Statement _block;
Catch(String id, AbstractVarExpr lhs, Statement block)
{
_id = id;
_lhs = lhs;
_block = block;
if (id == null)
throw new NullPointerException();
}
public String getId()
{
return _id;
}
public AbstractVarExpr getExpr()
{
return _lhs;
}
public Statement getBlock()
{
return _block;
}
}
}