Package com.caucho.quercus.script

Source Code of com.caucho.quercus.script.QuercusCompiledScript

/*
* 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.script;

import com.caucho.quercus.env.Env;
import com.caucho.quercus.env.Value;
import com.caucho.quercus.page.InterpretedPage;
import com.caucho.quercus.page.QuercusPage;
import com.caucho.quercus.program.QuercusProgram;
import com.caucho.vfs.*;

import javax.script.CompiledScript;
import javax.script.ScriptContext;
import javax.script.ScriptEngine;
import javax.script.ScriptException;
import java.io.Writer;

/**
* Script engine
*/
public class QuercusCompiledScript extends CompiledScript {
  private final QuercusScriptEngine _engine;
  private final QuercusProgram _program;

  QuercusCompiledScript(QuercusScriptEngine engine, QuercusProgram program)
  {
    _engine = engine;
    _program = program;
  }

  /**
   * evaluates based on a reader.
   */
  public Object eval(ScriptContext cxt)
    throws ScriptException
  {
    Env env = null;

    try {
      Writer writer = cxt.getWriter();

      WriteStream out;

      if (writer != null) {
        ReaderWriterStream s = new ReaderWriterStream(null, writer);
        WriteStream os = new WriteStream(s);
       
        os.setNewlineString("\n");
   
        try {
          os.setEncoding("utf-8");
        } catch (Exception e) {
        }

        out = os;
      }
      else
        out = new NullWriteStream();

      QuercusPage page = new InterpretedPage(_program);

      env = new Env(_engine.getQuercus(), page, out, null, null);

      env.setScriptContext(cxt);

      // php/214g
      env.start();

      Value resultV = _program.execute(env);
     
      Object result = null;
      if (resultV != null)
        result = resultV.toJavaObject();

      out.flushBuffer();
      out.free();

      return result;
      /*
    } catch (ScriptException e) {
      throw e;
      */
    } catch (RuntimeException e) {
      throw e;
    } catch (Exception e) {
      throw new ScriptException(e);
    } catch (Throwable e) {
      throw new RuntimeException(e);
    } finally {
      if (env != null)
        env.close();
    }
  }

  /**
   * Returns the script engine.
   */
  public ScriptEngine getEngine()
  {
    return _engine;
  }

  public String toString()
  {
    return "QuercusCompiledScript[]";
  }
}
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