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comparison agent/src/share/classes/sun/jvm/hotspot/utilities/soql/MethodCallable.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2007 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 */
23
24 package sun.jvm.hotspot.utilities.soql;
25
26 import java.lang.reflect.Method;
27 import javax.script.ScriptException;
28
29 /**
30 * An implementation of Callable interface that
31 * invokes an instance or static Java method when
32 * called.
33 */
34 public class MethodCallable implements Callable {
35 private Object target;
36 private Method method;
37 private boolean wrapArgs;
38
39 // "wrapArgs" tells whether the underlying java Method
40 // accepts one Object[] argument or it wants usual way of
41 // passing arguments. The former method is used when you
42 // want to implement a Callable that is variadic.
43 public MethodCallable(Object target, Method method, boolean wrapArgs) {
44 this.method = method;
45 this.target = target;
46 this.wrapArgs = wrapArgs;
47 }
48
49 public MethodCallable(Object target, Method method) {
50 this(target, method, true);
51 }
52
53 public Object call(Object[] args) throws ScriptException {
54 try {
55 if (wrapArgs) {
56 return method.invoke(target, new Object[] { args });
57 } else {
58 return method.invoke(target, args);
59 }
60 } catch (RuntimeException re) {
61 throw re;
62 } catch (Exception exp) {
63 throw new ScriptException(exp);
64 }
65 }
66 }