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    1   /*
    2    * @(#) PROCESSINVOKEVIRTUAL.java Jan 8, 2004
    3    *
    4    * Copyright (c) 2003 Delft University of Technology Jaffalaan 5, 2628 BX Delft,
    5    * the Netherlands All rights reserved.
    6    *
    7    * This software is proprietary information of Delft University of Technology
    8    * The code is published under the General Public License
    9    */
    10  package nl.tudelft.simulation.dsol.formalisms.process;
    11
    12  import java.io.DataInput;
    13  import java.io.IOException;
    14  import java.lang.reflect.Method;
    15  import java.lang.reflect.Modifier;
    16
    17  import nl.tudelft.simulation.dsol.interpreter.Frame;
    18  import nl.tudelft.simulation.dsol.interpreter.Interpreter;
    19  import nl.tudelft.simulation.dsol.interpreter.operations.reflection.INVOKEVIRTUAL;
    20  import nl.tudelft.simulation.language.concurrent.Monitor;
    21
    22  /***
    23   * PROCESSINVOKEVIRTUAL <br>
    24   * (c) copyright 2003 <a href="http://www.simulation.tudelft.nl">Delft
    25   * University of Technology </a>, the Netherlands. <br>
    26   * See for project information <a
    27   * href="http://www.simulation.tudelft.nl">www.simulation.tudelft.nl </a> <br>
    28   * License of use: <a href="http://www.gnu.org/copyleft/gpl.html">General Public
    29   * License (GPL) </a>, no warranty <br>
    30   *
    31   * @version 1.0 Jan 8, 2004 <br>
    32   * @author <a href="http://www.tbm.tudelft.nl/webstaf/peterja/index.htm">Peter
    33   *         Jacobs </a> <br>
    34   *         <a
    35   *         href="http://www.tbm.tudelft.nl/webstaf/alexandv/index.htm">Alexander
    36   *         Verbraeck </a>
    37   */
    38  public class PROCESSINVOKEVIRTUAL extends INVOKEVIRTUAL
    39  {
    40  	/***
    41  	 * constructs a new PROCESSINVOKEVIRTUAL
    42  	 *
    43  	 * @param dataInput the dataInput
    44  	 * @throws IOException on IOfailure
    45  	 */
    46  	public PROCESSINVOKEVIRTUAL(final DataInput dataInput) throws IOException
    47  	{
    48  		super(dataInput);
    49  	}
    50
    51  	/***
    52  	 * executes the operation and returns a new Frame
    53  	 *
    54  	 * @param frame the original frame
    55  	 * @param objectRef the object on which to invoke the method
    56  	 * @param arguments the arguments with which to invoke the method
    57  	 * @param method the method to invoke
    58  	 * @throws Exception on invocation exception
    59  	 * @return a new frame
    60  	 */
    61  	public Frame execute(final Frame frame, final Object objectRef,
    62  			final Method method, final Object[] arguments) throws Exception
    63  	{
    64  		if (Modifier.isNative(method.getModifiers())
    65  				|| !Process.class.isAssignableFrom(objectRef.getClass()))
    66  		{
    67  			return super.execute(frame, objectRef, method, arguments);
    68  		}
    69
    70  		//Let's check for the suspend method
    71  		if (method.getName().equals("suspend")
    72  				&& method.getParameterTypes().length == 0)
    73  		{
    74  			//we pause the frame
    75  			frame.setPaused(true);
    76  			return frame;
    77  		}
    78  		if (Modifier.isSynchronized(method.getModifiers()))
    79  		{
    80  			Monitor.lock(objectRef);
    81  		}
    82  		return Interpreter.createFrame(objectRef, method, arguments);
    83  	}
    84  }