|
1
31 package org.jruby.javasupport;
32
33 import java.lang.reflect.Array  ;
34
35 import org.jruby.Ruby;
36 import org.jruby.RubyClass;
37 import org.jruby.RubyFixnum;
38 import org.jruby.RubyInteger;
39 import org.jruby.RubyModule;
40 import org.jruby.runtime.ObjectAllocator;
41 import org.jruby.runtime.builtin.IRubyObject;
42
43 public class JavaArray extends JavaObject {
44
45 public JavaArray(Ruby runtime, Object array) {
46 super(runtime, runtime.getModule("Java").getClass("JavaArray"), array);
47 assert array.getClass().isArray();
48 }
49
50 public static RubyClass createJavaArrayClass(Ruby runtime, RubyModule javaModule) {
51 return javaModule.defineClassUnder("JavaArray", javaModule.getClass("JavaObject"), ObjectAllocator.NOT_ALLOCATABLE_ALLOCATOR);
54 }
55
56 public RubyFixnum length() {
57 return getRuntime().newFixnum(getLength());
58 }
59
60 private int getLength() {
61 return Array.getLength(getValue());
62 }
63
64 public IRubyObject aref(IRubyObject index) {
65 if (! (index instanceof RubyInteger)) {
66 throw getRuntime().newTypeError(index, getRuntime().getClass("Integer"));
67 }
68 int intIndex = (int) ((RubyInteger) index).getLongValue();
69 if (intIndex < 0 || intIndex >= getLength()) {
70 throw getRuntime().newArgumentError(
71 "index out of bounds for java array (" + intIndex +
72 " for length " + getLength() + ")");
73 }
74 Object result = Array.get(getValue(), intIndex);
75 if (result == null) {
76 return getRuntime().getNil();
77 }
78 return JavaObject.wrap(getRuntime(), result);
79 }
80
81 public IRubyObject aset(IRubyObject index, IRubyObject value) {
82 if (! (index instanceof RubyInteger)) {
83 throw getRuntime().newTypeError(index, getRuntime().getClass("Integer"));
84 }
85 int intIndex = (int) ((RubyInteger) index).getLongValue();
86 if (! (value instanceof JavaObject)) {
87 throw getRuntime().newTypeError("not a java object:" + value);
88 }
89 Object javaObject = ((JavaObject) value).getValue();
90 try {
91 Array.set(getValue(), intIndex, javaObject);
92 } catch (IndexOutOfBoundsException e) {
93 throw getRuntime().newArgumentError(
94 "index out of bounds for java array (" + intIndex +
95 " for length " + getLength() + ")");
96 } catch (ArrayStoreException e) {
97 throw getRuntime().newArgumentError(
98 "wrong element type " + javaObject.getClass() + "(array is " +
99 getValue().getClass() + ")");
100 }
101 return value;
102 }
103
104 public IRubyObject afill(IRubyObject beginIndex, IRubyObject endIndex, IRubyObject value) {
105 if (! (beginIndex instanceof RubyInteger)) {
106 throw getRuntime().newTypeError(beginIndex, getRuntime().getClass("Integer"));
107 }
108 int intIndex = (int) ((RubyInteger) beginIndex).getLongValue();
109 if (! (endIndex instanceof RubyInteger)) {
110 throw getRuntime().newTypeError(endIndex, getRuntime().getClass("Integer"));
111 }
112 int intEndIndex = (int) ((RubyInteger) endIndex).getLongValue();
113 if (! (value instanceof JavaObject)) {
114 throw getRuntime().newTypeError("not a java object:" + value);
115 }
116 Object javaObject = ((JavaObject) value).getValue();
117 Object self = getValue();
118 try {
119 for ( ; intIndex < intEndIndex; intIndex++) {
120 Array.set(self, intIndex, javaObject);
121 }
122 } catch (IndexOutOfBoundsException e) {
123 throw getRuntime().newArgumentError(
124 "index out of bounds for java array (" + intIndex +
125 " for length " + getLength() + ")");
126 } catch (ArrayStoreException e) {
127 throw getRuntime().newArgumentError(
128 "wrong element type " + javaObject.getClass() + "(array is " +
129 getValue().getClass() + ")");
130 }
131 return value;
132 }
133 }
134 |
Popular Tags |
Java API By Example, From Geeks To Geeks.