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1   /*
2    * @(#) NEWARRAY.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.interpreter.operations;
11  
12  import java.io.DataInput;
13  import java.io.IOException;
14  import java.lang.reflect.Array;
15  
16  import nl.tudelft.simulation.dsol.interpreter.LocalVariable;
17  import nl.tudelft.simulation.dsol.interpreter.OperandStack;
18  import nl.tudelft.simulation.dsol.interpreter.classfile.Constant;
19  
20  /***
21   * The NEWARRAY operation as defined in <a
22   * href="http://java.sun.com/docs/books/vmspec/2nd-edition/html/Instructions2.doc10.html">
23   * http://java.sun.com/docs/books/vmspec/2nd-edition/html/Instructions2.doc10.html
24   * </a>.
25   * <p>
26   * (c) copyright 2003 <a href="http://www.simulation.tudelft.nl">Delft
27   * University of Technology </a>, the Netherlands. <br>
28   * See for project information <a
29   * href="http://www.simulation.tudelft.nl">www.simulation.tudelft.nl </a> <br>
30   * License of use: <a href="http://www.gnu.org/copyleft/gpl.html">General Public
31   * License (GPL) </a>, no warranty <br>
32   * 
33   * @author <a href="http://www.tbm.tudelft.nl/webstaf/peterja/index.htm">Peter
34   *         Jacobs </a><a
35   *         href="http://www.tbm.tudelft.nl/webstaf/alexandv/index.htm">Alexander
36   *         Verbraeck </a>
37   * @version 1.3 Apr 6, 2004
38   * @since 1.4
39   */
40  public class NEWARRAY extends VoidOperation
41  {
42  	/*** OP refers to the operand code */
43  	public static final int OP = 188;
44  
45  	/*** the type to load */
46  	private int atype = -1;
47  
48  	/***
49  	 * constructs a new NEWARRAY
50  	 * 
51  	 * @param dataInput the dataInput
52  	 * @throws IOException on IOfailure
53  	 */
54  	public NEWARRAY(final DataInput dataInput) throws IOException
55  	{
56  		super();
57  		this.atype = dataInput.readUnsignedByte();
58  	}
59  
60  	/***
61  	 * @see nl.tudelft.simulation.dsol.interpreter.operations.VoidOperation#execute(
62  	 *      nl.tudelft.simulation.dsol.interpreter.OperandStack,
63  	 *      nl.tudelft.simulation.dsol.interpreter.classfile.Constant[],
64  	 *      nl.tudelft.simulation.dsol.interpreter.LocalVariable[])
65  	 */
66  	public void execute(final OperandStack stack,
67  			final Constant[] constantPool, final LocalVariable[] localVariables)
68  	{
69  		int length = ((Integer) stack.pop()).intValue();
70  		Class clazz = null;
71  		switch (this.atype)
72  		{
73  			case 4 :
74  				clazz = boolean.class;
75  				break;
76  			case 5 :
77  				clazz = char.class;
78  				break;
79  			case 6 :
80  				clazz = float.class;
81  				break;
82  			case 7 :
83  				clazz = double.class;
84  				break;
85  			case 8 :
86  				clazz = byte.class;
87  				break;
88  			case 9 :
89  				clazz = short.class;
90  				break;
91  			case 10 :
92  				clazz = int.class;
93  				break;
94  			case 11 :
95  				clazz = long.class;
96  				break;
97  			default :
98  				throw new RuntimeException("unknown atype in NEWARRAY");
99  		}
100 		Object array = Array.newInstance(clazz, length);
101 		stack.push(array);
102 	}
103 
104 	/***
105 	 * @see nl.tudelft.simulation.dsol.interpreter.Operation#getByteLength()
106 	 */
107 	public int getByteLength()
108 	{
109 		return OPCODE_BYTE_LENGTH + 1;
110 	}
111 
112 	/***
113 	 * @see nl.tudelft.simulation.dsol.interpreter.Operation#getOpcode()
114 	 */
115 	public int getOpcode()
116 	{
117 		return NEWARRAY.OP;
118 	}
119 }