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Java > Open Source Codes > org > jruby > javasupport > JavaCallable


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2  * Version: CPL 1.0/GPL 2.0/LGPL 2.1
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4  * The contents of this file are subject to the Common Public
5  * License Version 1.0 (the "License"); you may not use this file
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7  * the License at http://www.eclipse.org/legal/cpl-v10.html
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13  *
14  * Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
15  * Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
16  * Copyright (C) 2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
17  * Copyright (C) 2004 David Corbin <dcorbin@users.sourceforge.net>
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31 package org.jruby.javasupport;
32
33 import java.lang.reflect.Modifier JavaDoc;
34
35 import org.jruby.Ruby;
36 import org.jruby.RubyArray;
37 import org.jruby.RubyBoolean;
38 import org.jruby.RubyClass;
39 import org.jruby.RubyFixnum;
40 import org.jruby.runtime.CallbackFactory;
41 import org.jruby.runtime.builtin.IRubyObject;
42
43 public abstract class JavaCallable extends JavaAccessibleObject {
44
45     public JavaCallable(Ruby runtime, RubyClass rubyClass) {
46         super(runtime, rubyClass);
47     }
48
49     public final RubyFixnum arity() {
50         return getRuntime().newFixnum(getArity());
51     }
52
53     public final RubyArray argument_types() {
54         Class JavaDoc[] parameterTypes = parameterTypes();
55         RubyArray result = getRuntime().newArray(parameterTypes.length);
56         for (int i = 0; i < parameterTypes.length; i++) {
57             result.append(JavaClass.get(getRuntime(), parameterTypes[i]));
58         }
59         return result;
60     }
61
62     public IRubyObject inspect() {
63         StringBuffer JavaDoc result = new StringBuffer JavaDoc();
64         result.append(nameOnInspection());
65         Class JavaDoc[] parameterTypes = parameterTypes();
66         for (int i = 0; i < parameterTypes.length; i++) {
67             result.append(parameterTypes[i].getName());
68             if (i < parameterTypes.length - 1) {
69                 result.append(',');
70             }
71         }
72         result.append(")>");
73         return getRuntime().newString(result.toString());
74     }
75
76     protected abstract int getArity();
77     protected abstract Class JavaDoc[] parameterTypes();
78     protected abstract int getModifiers();
79
80     /**
81      * @return the name used in the head of the string returned from inspect()
82      */
83     protected abstract String JavaDoc nameOnInspection();
84
85     public RubyBoolean public_p() {
86         return RubyBoolean.newBoolean(getRuntime(), Modifier.isPublic(getModifiers()));
87     }
88
89
90     public static void registerRubyMethods(Ruby runtime, RubyClass result, Class JavaDoc klass) {
91         registerRubyMethods(runtime, result);
92         
93         CallbackFactory callbackFactory = runtime.callbackFactory(klass);
94
95         result.defineFastMethod("public?", callbackFactory.getFastMethod("public_p"));
96     }
97 }
98
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