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33 package org.jruby.javasupport;
34
35 import java.lang.reflect.AccessibleObject  ;
36 import java.lang.reflect.Field ;
37 import java.lang.reflect.Modifier ;
38
39 import org.jruby.Ruby;
40 import org.jruby.RubyBoolean;
41 import org.jruby.RubyClass;
42 import org.jruby.RubyModule;
43 import org.jruby.RubyString;
44 import org.jruby.runtime.CallbackFactory;
45 import org.jruby.runtime.ObjectAllocator;
46 import org.jruby.runtime.builtin.IRubyObject;
47
48 public class JavaField extends JavaAccessibleObject {
49 private Field field;
50
51 public static RubyClass createJavaFieldClass(Ruby runtime, RubyModule javaModule) {
52 RubyClass result = javaModule.defineClassUnder("JavaField", runtime.getObject(), ObjectAllocator.NOT_ALLOCATABLE_ALLOCATOR);
55 CallbackFactory callbackFactory = runtime.callbackFactory(JavaField.class);
56
57 JavaAccessibleObject.registerRubyMethods(runtime, result);
58 result.defineFastMethod("value_type", callbackFactory.getFastMethod("value_type"));
59 result.defineFastMethod("public?", callbackFactory.getFastMethod("public_p"));
60 result.defineFastMethod("static?", callbackFactory.getFastMethod("static_p"));
61 result.defineFastMethod("value", callbackFactory.getFastMethod("value", IRubyObject.class));
62 result.defineFastMethod("set_value", callbackFactory.getFastMethod("set_value", IRubyObject.class, IRubyObject.class));
63 result.defineFastMethod("final?", callbackFactory.getFastMethod("final_p"));
64 result.defineFastMethod("static_value", callbackFactory.getFastMethod("static_value"));
65 result.defineFastMethod("name", callbackFactory.getFastMethod("name"));
66 result.defineFastMethod("==", callbackFactory.getFastMethod("equal", IRubyObject.class));
67 result.defineAlias("===", "==");
68
69 return result;
70 }
71
72 public JavaField(Ruby runtime, Field field) {
73 super(runtime, (RubyClass) runtime.getModule("Java").getClass("JavaField"));
74 this.field = field;
75 }
76
77 public RubyString value_type() {
78 return getRuntime().newString(field.getType().getName());
79 }
80
81 public IRubyObject equal(IRubyObject other) {
82 if (!(other instanceof JavaField)) {
83 return getRuntime().getFalse();
84 }
85
86 return getRuntime().newBoolean(field.equals(((JavaField) other).field));
87 }
88
89 public RubyBoolean public_p() {
90 return getRuntime().newBoolean(Modifier.isPublic(field.getModifiers()));
91 }
92
93 public RubyBoolean static_p() {
94 return getRuntime().newBoolean(Modifier.isStatic(field.getModifiers()));
95 }
96
97 public JavaObject value(IRubyObject object) {
98 if (! (object instanceof JavaObject)) {
99 throw getRuntime().newTypeError("not a java object");
100 }
101 Object javaObject = ((JavaObject) object).getValue();
102 try {
103 return JavaObject.wrap(getRuntime(), field.get(javaObject));
104 } catch (IllegalAccessException iae) {
105 throw getRuntime().newTypeError("illegal access");
106 }
107 }
108
109 public JavaObject set_value(IRubyObject object, IRubyObject value) {
110 if (! (object instanceof JavaObject)) {
111 throw getRuntime().newTypeError("not a java object: " + object);
112 }
113 if (! (value instanceof JavaObject)) {
114 throw getRuntime().newTypeError("not a java object:" + value);
115 }
116 Object javaObject = ((JavaObject) object).getValue();
117 try {
118 Object convertedValue = JavaUtil.convertArgument(((JavaObject) value).getValue(),
119 field.getType());
120
121 field.set(javaObject, convertedValue);
122 } catch (IllegalAccessException iae) {
123 throw getRuntime().newTypeError(
124 "illegal access on setting variable: " + iae.getMessage());
125 } catch (IllegalArgumentException iae) {
126 throw getRuntime().newTypeError(
127 "wrong type for " + field.getType().getName() + ": " +
128 ((JavaObject) value).getValue().getClass().getName());
129 }
130 return (JavaObject) value;
131 }
132
133 public RubyBoolean final_p() {
134 return getRuntime().newBoolean(Modifier.isFinal(field.getModifiers()));
135 }
136
137 public JavaObject static_value() {
138 try {
139 field.setAccessible(true);
144 return JavaObject.wrap(getRuntime(), field.get(null));
145 } catch (IllegalAccessException iae) {
146 throw getRuntime().newTypeError("illegal static value access: " + iae.getMessage());
147 }
148 }
149
150 public RubyString name() {
151 return getRuntime().newString(field.getName());
152 }
153
154 protected AccessibleObject accesibleObject() {
155 return field;
156 }
157 }
158 |
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