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10 package nl.tudelft.simulation.dsol.interpreter.operations;
11
12 import java.io.DataInput;
13 import java.io.IOException;
14 import java.lang.reflect.Field;
15
16 import nl.tudelft.simulation.dsol.interpreter.InterpreterException;
17 import nl.tudelft.simulation.dsol.interpreter.LocalVariable;
18 import nl.tudelft.simulation.dsol.interpreter.OperandStack;
19 import nl.tudelft.simulation.dsol.interpreter.classfile.Constant;
20 import nl.tudelft.simulation.dsol.interpreter.classfile.ConstantFieldref;
21 import nl.tudelft.simulation.language.reflection.ClassUtil;
22
23 /***
24 * The PUTSTATIC operation as defined in <a
25 * href="http://java.sun.com/docs/books/vmspec/2nd-edition/html/Instructions2.doc11.html">
26 * http://java.sun.com/docs/books/vmspec/2nd-edition/html/Instructions2.doc11.html
27 * </a>.
28 * <p>
29 * (c) copyright 2003 <a href="http://www.simulation.tudelft.nl">Delft
30 * University of Technology </a>, the Netherlands. <br>
31 * See for project information <a
32 * href="http://www.simulation.tudelft.nl">www.simulation.tudelft.nl </a> <br>
33 * License of use: <a href="http://www.gnu.org/copyleft/gpl.html">General Public
34 * License (GPL) </a>, no warranty <br>
35 *
36 * @author <a href="http://www.tbm.tudelft.nl/webstaf/peterja/index.htm">Peter
37 * Jacobs </a><a
38 * href="http://www.tbm.tudelft.nl/webstaf/alexandv/index.htm">Alexander
39 * Verbraeck </a>
40 * @version 1.3 Apr 6, 2004
41 * @since 1.4
42 */
43
44 public class PUTSTATIC extends VoidOperation
45 {
46 /*** OP refers to the operand code */
47 public static final int OP = 179;
48
49 /*** the index to load */
50 private int index = -1;
51
52 /***
53 * constructs a new PUTSTATIC
54 *
55 * @param dataInput the dataInput
56 * @throws IOException on IOfailure
57 */
58 public PUTSTATIC(final DataInput dataInput) throws IOException
59 {
60 super();
61 this.index = dataInput.readUnsignedShort();
62 }
63
64 /***
65 * @see nl.tudelft.simulation.dsol.interpreter.operations.VoidOperation#execute(
66 * nl.tudelft.simulation.dsol.interpreter.OperandStack,
67 * nl.tudelft.simulation.dsol.interpreter.classfile.Constant[],
68 * nl.tudelft.simulation.dsol.interpreter.LocalVariable[])
69 */
70 public void execute(final OperandStack stack,
71 final Constant[] constantPool, final LocalVariable[] localVariables)
72 {
73 try
74 {
75 ConstantFieldref constantFieldref = (ConstantFieldref) constantPool[this.index];
76 Class referenceClass = constantFieldref.getConstantClass()
77 .getValue().getClassValue();
78 Field field = ClassUtil.resolveField(referenceClass,
79 constantFieldref.getConstantNameAndType().getName());
80 field.setAccessible(true);
81 Object value = stack.pop();
82 Object target = null;
83 if (!field.getType().isPrimitive())
84 {
85 field.set(target, value);
86 return;
87 }
88 if (field.getType().equals(boolean.class)
89 || field.getType().equals(byte.class)
90 || field.getType().equals(char.class)
91 || field.getType().equals(short.class)
92 || field.getType().equals(int.class))
93 {
94 field.setInt(target, ((Integer) value).intValue());
95 return;
96 }
97 if (field.getType().equals(float.class))
98 {
99 field.setFloat(target, ((Float) value).floatValue());
100 return;
101 }
102 if (field.getType().equals(long.class))
103 {
104 field.setLong(target, ((Long) value).longValue());
105 return;
106 }
107 if (field.getType().equals(double.class))
108 {
109 field.setDouble(target, ((Double) value).doubleValue());
110 return;
111 }
112 } catch (Exception exception)
113 {
114 throw new InterpreterException(exception);
115 }
116 }
117
118 /***
119 * @see nl.tudelft.simulation.dsol.interpreter.Operation#getByteLength()
120 */
121 public int getByteLength()
122 {
123 return OPCODE_BYTE_LENGTH + 2;
124 }
125
126 /***
127 * @see nl.tudelft.simulation.dsol.interpreter.Operation#getOpcode()
128 */
129 public int getOpcode()
130 {
131 return PUTSTATIC.OP;
132 }
133 }