1 |
772 |
jeremybenn |
/* ArrayType.java -- Open type descriptor for an array.
|
2 |
|
|
Copyright (C) 2006, 2007 Free Software Foundation, Inc.
|
3 |
|
|
|
4 |
|
|
This file is part of GNU Classpath.
|
5 |
|
|
|
6 |
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
7 |
|
|
it under the terms of the GNU General Public License as published by
|
8 |
|
|
the Free Software Foundation; either version 2, or (at your option)
|
9 |
|
|
any later version.
|
10 |
|
|
|
11 |
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
12 |
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 |
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
14 |
|
|
General Public License for more details.
|
15 |
|
|
|
16 |
|
|
You should have received a copy of the GNU General Public License
|
17 |
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
18 |
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
19 |
|
|
02110-1301 USA.
|
20 |
|
|
|
21 |
|
|
Linking this library statically or dynamically with other modules is
|
22 |
|
|
making a combined work based on this library. Thus, the terms and
|
23 |
|
|
conditions of the GNU General Public License cover the whole
|
24 |
|
|
combination.
|
25 |
|
|
|
26 |
|
|
As a special exception, the copyright holders of this library give you
|
27 |
|
|
permission to link this library with independent modules to produce an
|
28 |
|
|
executable, regardless of the license terms of these independent
|
29 |
|
|
modules, and to copy and distribute the resulting executable under
|
30 |
|
|
terms of your choice, provided that you also meet, for each linked
|
31 |
|
|
independent module, the terms and conditions of the license of that
|
32 |
|
|
module. An independent module is a module which is not derived from
|
33 |
|
|
or based on this library. If you modify this library, you may extend
|
34 |
|
|
this exception to your version of the library, but you are not
|
35 |
|
|
obligated to do so. If you do not wish to do so, delete this
|
36 |
|
|
exception statement from your version. */
|
37 |
|
|
|
38 |
|
|
package javax.management.openmbean;
|
39 |
|
|
|
40 |
|
|
import java.lang.reflect.Array;
|
41 |
|
|
|
42 |
|
|
import java.util.HashMap;
|
43 |
|
|
import java.util.Map;
|
44 |
|
|
|
45 |
|
|
/**
|
46 |
|
|
* The open type descriptor for arrays of open data values.
|
47 |
|
|
*
|
48 |
|
|
* @author Andrew John Hughes (gnu_andrew@member.fsf.org)
|
49 |
|
|
* @since 1.5
|
50 |
|
|
*/
|
51 |
|
|
public class ArrayType<T>
|
52 |
|
|
extends OpenType<T>
|
53 |
|
|
{
|
54 |
|
|
|
55 |
|
|
/**
|
56 |
|
|
* Compatible with JDK 1.5
|
57 |
|
|
*/
|
58 |
|
|
private static final long serialVersionUID = 720504429830309770L;
|
59 |
|
|
|
60 |
|
|
/**
|
61 |
|
|
* The number of dimensions arrays of this type has.
|
62 |
|
|
*/
|
63 |
|
|
private int dimension;
|
64 |
|
|
|
65 |
|
|
/**
|
66 |
|
|
* The element type of arrays of this type.
|
67 |
|
|
*/
|
68 |
|
|
private OpenType<?> elementType;
|
69 |
|
|
|
70 |
|
|
/**
|
71 |
|
|
* True if this type represents a primitive array.
|
72 |
|
|
*/
|
73 |
|
|
private boolean primitiveArray;
|
74 |
|
|
|
75 |
|
|
/**
|
76 |
|
|
* The hash code of this instance.
|
77 |
|
|
*/
|
78 |
|
|
private transient Integer hashCode;
|
79 |
|
|
|
80 |
|
|
/**
|
81 |
|
|
* The <code>toString()</code> result of this instance.
|
82 |
|
|
*/
|
83 |
|
|
private transient String string;
|
84 |
|
|
|
85 |
|
|
/**
|
86 |
|
|
* A cache of {@link ArrayType} instances created
|
87 |
|
|
* by {@link #getArrayType(OpenType)}.
|
88 |
|
|
*/
|
89 |
|
|
private static final Map<OpenType<?>,ArrayType<?>> cache =
|
90 |
|
|
new HashMap<OpenType<?>,ArrayType<?>>();
|
91 |
|
|
|
92 |
|
|
/**
|
93 |
|
|
* A cache of {@link ArrayType} instances created
|
94 |
|
|
* by {@link #getPrimitiveArrayType(Class)}.
|
95 |
|
|
*/
|
96 |
|
|
private static final Map<Class<?>,ArrayType<?>> primCache =
|
97 |
|
|
new HashMap<Class<?>,ArrayType<?>>();
|
98 |
|
|
|
99 |
|
|
/**
|
100 |
|
|
* Returns the class name of the array, given the element
|
101 |
|
|
* class name and its dimensions.
|
102 |
|
|
*
|
103 |
|
|
* @param elementType the type of the array's elements.
|
104 |
|
|
* @param dim the dimensions of the array.
|
105 |
|
|
* @param primitive true if this should be a primitive array.
|
106 |
|
|
* @return the array's class name.
|
107 |
|
|
* @throws OpenDataException if the class name does not reference
|
108 |
|
|
* a loadable class.
|
109 |
|
|
*/
|
110 |
|
|
private static final String getArrayClassName(OpenType<?> elementType,
|
111 |
|
|
int dim,
|
112 |
|
|
boolean primitive)
|
113 |
|
|
throws OpenDataException
|
114 |
|
|
{
|
115 |
|
|
Class<?> type;
|
116 |
|
|
if (primitive)
|
117 |
|
|
type = getPrimitiveTypeClass((SimpleType<?>) elementType);
|
118 |
|
|
else
|
119 |
|
|
{
|
120 |
|
|
String className = elementType.getClassName();
|
121 |
|
|
try
|
122 |
|
|
{
|
123 |
|
|
type = Class.forName(className);
|
124 |
|
|
}
|
125 |
|
|
catch (ClassNotFoundException e)
|
126 |
|
|
{
|
127 |
|
|
throw new OpenDataException("The class name, " + className +
|
128 |
|
|
", is unavailable.");
|
129 |
|
|
}
|
130 |
|
|
}
|
131 |
|
|
while (type.isArray())
|
132 |
|
|
type = type.getComponentType();
|
133 |
|
|
return
|
134 |
|
|
Array.newInstance(type,
|
135 |
|
|
new int[getDimensions(elementType, dim)]).getClass().getName();
|
136 |
|
|
}
|
137 |
|
|
|
138 |
|
|
/**
|
139 |
|
|
* Returns the dimensions of the new {@link ArrayType},
|
140 |
|
|
* based on whether the given element type is already an
|
141 |
|
|
* {@link ArrayType} or not.
|
142 |
|
|
*
|
143 |
|
|
* @param elementType the type of the array.
|
144 |
|
|
* @param dim the proposed dimensions.
|
145 |
|
|
* @return the resultant dimensions.
|
146 |
|
|
* @throws IllegalArgumentException if <code>dim</code> is less than 1.
|
147 |
|
|
*/
|
148 |
|
|
private static final int getDimensions(OpenType<?> elementType,
|
149 |
|
|
int dim)
|
150 |
|
|
{
|
151 |
|
|
if (dim < 1)
|
152 |
|
|
throw new IllegalArgumentException("Dimensions must be greater " +
|
153 |
|
|
"than or equal to 1.");
|
154 |
|
|
if (elementType instanceof ArrayType)
|
155 |
|
|
return dim + ((ArrayType<?>) elementType).getDimension();
|
156 |
|
|
return dim;
|
157 |
|
|
}
|
158 |
|
|
|
159 |
|
|
/**
|
160 |
|
|
* Returns the appropriate primitive type name, given the
|
161 |
|
|
* corresponding wrapper class.
|
162 |
|
|
*
|
163 |
|
|
* @param type the type to convert.
|
164 |
|
|
* @return the corresponding primitive type.
|
165 |
|
|
* @throws OpenDataException if {@code type} is not a valid
|
166 |
|
|
* {@link Class} for a primitive type.
|
167 |
|
|
*
|
168 |
|
|
*/
|
169 |
|
|
private static final SimpleType<?> getPrimitiveType(Class<?> type)
|
170 |
|
|
throws OpenDataException
|
171 |
|
|
{
|
172 |
|
|
if (type.equals(Boolean.TYPE))
|
173 |
|
|
return SimpleType.BOOLEAN;
|
174 |
|
|
if (type.equals(Byte.TYPE))
|
175 |
|
|
return SimpleType.BYTE;
|
176 |
|
|
if (type.equals(Character.TYPE))
|
177 |
|
|
return SimpleType.CHARACTER;
|
178 |
|
|
if (type.equals(Double.TYPE))
|
179 |
|
|
return SimpleType.DOUBLE;
|
180 |
|
|
if (type.equals(Float.TYPE))
|
181 |
|
|
return SimpleType.FLOAT;
|
182 |
|
|
if (type.equals(Integer.TYPE))
|
183 |
|
|
return SimpleType.INTEGER;
|
184 |
|
|
if (type.equals(Long.TYPE))
|
185 |
|
|
return SimpleType.LONG;
|
186 |
|
|
if (type.equals(Short.TYPE))
|
187 |
|
|
return SimpleType.SHORT;
|
188 |
|
|
if (type.equals(Void.TYPE))
|
189 |
|
|
return SimpleType.VOID;
|
190 |
|
|
throw new OpenDataException(type + " is not a primitive type.");
|
191 |
|
|
}
|
192 |
|
|
|
193 |
|
|
/**
|
194 |
|
|
* Returns the appropriate primitive type name, given the
|
195 |
|
|
* corresponding wrapper class.
|
196 |
|
|
*
|
197 |
|
|
* @param type the type to convert.
|
198 |
|
|
* @return the corresponding primitive type.
|
199 |
|
|
* @throws OpenDataException if {@code type} is not a valid
|
200 |
|
|
* {@link SimpleType} for a primitive type.
|
201 |
|
|
*
|
202 |
|
|
*/
|
203 |
|
|
private static final Class<?> getPrimitiveTypeClass(SimpleType<?> type)
|
204 |
|
|
throws OpenDataException
|
205 |
|
|
{
|
206 |
|
|
if (type.equals(SimpleType.BOOLEAN))
|
207 |
|
|
return Boolean.TYPE;
|
208 |
|
|
if (type.equals(SimpleType.BYTE))
|
209 |
|
|
return Byte.TYPE;
|
210 |
|
|
if (type.equals(SimpleType.CHARACTER))
|
211 |
|
|
return Character.TYPE;
|
212 |
|
|
if (type.equals(SimpleType.DOUBLE))
|
213 |
|
|
return Double.TYPE;
|
214 |
|
|
if (type.equals(SimpleType.FLOAT))
|
215 |
|
|
return Float.TYPE;
|
216 |
|
|
if (type.equals(SimpleType.INTEGER))
|
217 |
|
|
return Integer.TYPE;
|
218 |
|
|
if (type.equals(SimpleType.LONG))
|
219 |
|
|
return Long.TYPE;
|
220 |
|
|
if (type.equals(SimpleType.SHORT))
|
221 |
|
|
return Short.TYPE;
|
222 |
|
|
if (type.equals(SimpleType.VOID))
|
223 |
|
|
return Void.TYPE;
|
224 |
|
|
throw new OpenDataException(type + " is not a primitive type.");
|
225 |
|
|
}
|
226 |
|
|
|
227 |
|
|
/**
|
228 |
|
|
* Returns the element type that will actually be used, if the
|
229 |
|
|
* specified element type is passed to a constructor. This is
|
230 |
|
|
* necessary to ensure that a non-array type is still returned when
|
231 |
|
|
* an {@link ArrayType} is constructed from an {@link ArrayType}.
|
232 |
|
|
*
|
233 |
|
|
* @param elemType the element type that was supplied.
|
234 |
|
|
* @return the element type that will be used.
|
235 |
|
|
*/
|
236 |
|
|
private static final OpenType<?> getElementType(OpenType<?> elemType)
|
237 |
|
|
{
|
238 |
|
|
if (elemType instanceof ArrayType)
|
239 |
|
|
return ((ArrayType<?>) elemType).getElementOpenType();
|
240 |
|
|
return elemType;
|
241 |
|
|
}
|
242 |
|
|
|
243 |
|
|
/**
|
244 |
|
|
* Returns the element type name that will actually be used, if the
|
245 |
|
|
* specified element type is passed to a constructor. This is
|
246 |
|
|
* necessary to ensure that a non-array type is still returned when
|
247 |
|
|
* an {@link ArrayType} is constructed from an {@link ArrayType},
|
248 |
|
|
* and that primitive arrays are described correctly.
|
249 |
|
|
*
|
250 |
|
|
* @param elemType the element type that was supplied.
|
251 |
|
|
* @return the element type name that will be used.
|
252 |
|
|
* @throws OpenDataException if the element type is not a valid
|
253 |
|
|
* {@link SimpleType} for a primitive type.
|
254 |
|
|
*/
|
255 |
|
|
private static final String getElementTypeName(OpenType<?> elemType)
|
256 |
|
|
throws OpenDataException
|
257 |
|
|
{
|
258 |
|
|
OpenType<?> trueElemType = getElementType(elemType);
|
259 |
|
|
if (elemType instanceof ArrayType &&
|
260 |
|
|
((ArrayType<?>) elemType).isPrimitiveArray())
|
261 |
|
|
return getPrimitiveTypeClass((SimpleType<?>) trueElemType).getName();
|
262 |
|
|
return trueElemType.getClassName();
|
263 |
|
|
}
|
264 |
|
|
|
265 |
|
|
/**
|
266 |
|
|
* <p>
|
267 |
|
|
* Constructs a new {@link ArrayType} instance for an array of the
|
268 |
|
|
* specified type with the supplied number of dimensions. The attributes
|
269 |
|
|
* used by the superclass, {@link OpenType}, are automatically defined,
|
270 |
|
|
* based on these values. Both the class name and type name are set
|
271 |
|
|
* to the value returned by the {@link java.lang.Class#getName()} of
|
272 |
|
|
* the array's class (i.e. the element type, preceded by n instances of
|
273 |
|
|
* '[' and an 'L', where n is the number of dimensions the array has).
|
274 |
|
|
* The description is based upon the template <code>n-dimension array
|
275 |
|
|
* of e</code>, where n is the number of dimensions of the array, and
|
276 |
|
|
* e is the element type. The class name of the actual elements is
|
277 |
|
|
* obtainable by calling {@link OpenType#getClassName()} on the result
|
278 |
|
|
* of {@link #getElementOpenType()}.
|
279 |
|
|
* </p>
|
280 |
|
|
* <p>
|
281 |
|
|
* As an example, the array type returned by
|
282 |
|
|
* <code>new ArrayType(6, SimpleType.INTEGER)</code> has the following
|
283 |
|
|
* values:
|
284 |
|
|
* </p>
|
285 |
|
|
* <table>
|
286 |
|
|
* <th><td>Attribute</td><td>Value</td></th>
|
287 |
|
|
* <tr><td>Class Name</td><td><code>[[[[[[Ljava.lang.Integer;</code>
|
288 |
|
|
* </td></tr>
|
289 |
|
|
* <tr><td>Type Name</td><td><code>[[[[[[Ljava.lang.Integer;</code>
|
290 |
|
|
* </td></tr>
|
291 |
|
|
* <tr><td>Description</td><td><code>6-dimension array of
|
292 |
|
|
* java.lang.Integer</code></td></tr>
|
293 |
|
|
* <tr><td>Element Type Class Name</td><td><code>java.lang.Integer</code>
|
294 |
|
|
* </td></tr>
|
295 |
|
|
* </table>
|
296 |
|
|
* <p>
|
297 |
|
|
* The dimensions of the array must be equal to or greater than 1. The
|
298 |
|
|
* element type must be an instance of {@link SimpleType},
|
299 |
|
|
* {@link CompositeType} or {@link TabularType}.
|
300 |
|
|
* </p>
|
301 |
|
|
*
|
302 |
|
|
* @param dim the dimensions of the array.
|
303 |
|
|
* @param elementType the type of the elements of the array.
|
304 |
|
|
* @throws IllegalArgumentException if <code>dim</code> is less than 1.
|
305 |
|
|
* @throws OpenDataException if the element type is not an instance of either
|
306 |
|
|
* {@link SimpleType}, {@link CompositeType}
|
307 |
|
|
* or {@link TabularType}.
|
308 |
|
|
*/
|
309 |
|
|
public ArrayType(int dim, OpenType<?> elementType)
|
310 |
|
|
throws OpenDataException
|
311 |
|
|
{
|
312 |
|
|
super(getArrayClassName(elementType, dim, false),
|
313 |
|
|
getArrayClassName(elementType, dim, false),
|
314 |
|
|
getDimensions(elementType, dim) + "-dimension array of "
|
315 |
|
|
+ getElementTypeName(elementType));
|
316 |
|
|
if (!(elementType instanceof SimpleType ||
|
317 |
|
|
elementType instanceof CompositeType ||
|
318 |
|
|
elementType instanceof TabularType ||
|
319 |
|
|
elementType instanceof ArrayType))
|
320 |
|
|
throw new OpenDataException("The element type must be a simple " +
|
321 |
|
|
"type, an array type, a composite type " +
|
322 |
|
|
"or a tabular type.");
|
323 |
|
|
dimension = getDimensions(elementType, dim);
|
324 |
|
|
this.elementType = getElementType(elementType);
|
325 |
|
|
primitiveArray = (elementType instanceof ArrayType &&
|
326 |
|
|
((ArrayType<?>) elementType).isPrimitiveArray());
|
327 |
|
|
}
|
328 |
|
|
|
329 |
|
|
/**
|
330 |
|
|
* <p>
|
331 |
|
|
* Constructs a new {@link ArrayType} instance for a unidimensional
|
332 |
|
|
* array of the specified {@link SimpleType}. The attributes
|
333 |
|
|
* used by the superclass, {@link OpenType}, are automatically defined,
|
334 |
|
|
* based on these values. Both the class name and type name are set
|
335 |
|
|
* to the value returned by the {@link java.lang.Class#getName()} of
|
336 |
|
|
* the array's class. If the array is of a primitive type (indicated
|
337 |
|
|
* by giving {@code primitiveArray} the value {@code true}), the
|
338 |
|
|
* name will be '[' followed by the appropriate letter for the
|
339 |
|
|
* primitive type (see {@link java.lang.Class#getName()}). If the
|
340 |
|
|
* array is not of a primitive type, then the name is formed from
|
341 |
|
|
* the element type, preceded by '[' and an 'L', in the same way
|
342 |
|
|
* as when the multi-dimensional constructor is used.
|
343 |
|
|
* </p>
|
344 |
|
|
* <p>
|
345 |
|
|
* The description is based upon the template <code>1-dimension array
|
346 |
|
|
* of e</code>, where e is either the primitive type or a class name,
|
347 |
|
|
* depending on whether the array itself is of a primitive type or not.
|
348 |
|
|
* The class name of the actual elements is obtainable by calling
|
349 |
|
|
* {@link OpenType#getClassName()} on the result of
|
350 |
|
|
* {@link #getElementOpenType()}. This will be the appropriate wrapper
|
351 |
|
|
* class for a primitive type.
|
352 |
|
|
* </p>
|
353 |
|
|
* <p>
|
354 |
|
|
* As an example, the array type returned by
|
355 |
|
|
* <code>new ArrayType(SimpleType.INTEGER, true)</code> has the following
|
356 |
|
|
* values:
|
357 |
|
|
* </p>
|
358 |
|
|
* <table>
|
359 |
|
|
* <th><td>Attribute</td><td>Value</td></th>
|
360 |
|
|
* <tr><td>Class Name</td><td><code>[I</code>
|
361 |
|
|
* </td></tr>
|
362 |
|
|
* <tr><td>Type Name</td><td><code>[I</code>
|
363 |
|
|
* </td></tr>
|
364 |
|
|
* <tr><td>Description</td><td><code>1-dimension array of int</code></td></tr>
|
365 |
|
|
* <tr><td>Element Type Class Name</td><td><code>java.lang.Integer</code>
|
366 |
|
|
* </td></tr>
|
367 |
|
|
* </table>
|
368 |
|
|
*
|
369 |
|
|
* @param elementType the type of the elements of the array.
|
370 |
|
|
* @param primitiveArray true if the array should be of a primitive type.
|
371 |
|
|
* @throws OpenDataException if {@code primitiveArray} is {@code true},
|
372 |
|
|
* and {@link elementType} is not a valid
|
373 |
|
|
* {@link SimpleType} for a primitive type.
|
374 |
|
|
* @since 1.6
|
375 |
|
|
*/
|
376 |
|
|
public ArrayType(SimpleType<?> elementType, boolean primitiveArray)
|
377 |
|
|
throws OpenDataException
|
378 |
|
|
{
|
379 |
|
|
super(getArrayClassName(elementType, 1, primitiveArray),
|
380 |
|
|
getArrayClassName(elementType, 1, primitiveArray),
|
381 |
|
|
"1-dimension array of " +
|
382 |
|
|
(primitiveArray ? getPrimitiveTypeClass(elementType).getName()
|
383 |
|
|
: elementType.getClassName()));
|
384 |
|
|
dimension = 1;
|
385 |
|
|
this.elementType = elementType;
|
386 |
|
|
this.primitiveArray = primitiveArray;
|
387 |
|
|
}
|
388 |
|
|
|
389 |
|
|
/**
|
390 |
|
|
* <p>
|
391 |
|
|
* Compares this array type with another object
|
392 |
|
|
* for equality. The objects are judged to be equal if:
|
393 |
|
|
* </p>
|
394 |
|
|
* <ul>
|
395 |
|
|
* <li><code>obj</code> is not null.</li>
|
396 |
|
|
* <li><code>obj</code> is an instance of
|
397 |
|
|
* {@link ArrayType}.</li>
|
398 |
|
|
* <li>The dimensions are equal.</li>
|
399 |
|
|
* <li>The element types are equal.</li>
|
400 |
|
|
* <li>The primitive array flag is set the same in both
|
401 |
|
|
* instances.</li>
|
402 |
|
|
* </ul>
|
403 |
|
|
*
|
404 |
|
|
* @param obj the object to compare with.
|
405 |
|
|
* @return true if the conditions above hold.
|
406 |
|
|
*/
|
407 |
|
|
public boolean equals(Object obj)
|
408 |
|
|
{
|
409 |
|
|
if (!(obj instanceof ArrayType))
|
410 |
|
|
return false;
|
411 |
|
|
ArrayType<?> atype = (ArrayType<?>) obj;
|
412 |
|
|
return (atype.getDimension() == dimension &&
|
413 |
|
|
atype.getElementOpenType().equals(elementType) &&
|
414 |
|
|
atype.isPrimitiveArray() == primitiveArray);
|
415 |
|
|
}
|
416 |
|
|
|
417 |
|
|
/**
|
418 |
|
|
* <p>
|
419 |
|
|
* Returns a new {@link ArrayType} instance in a type-safe
|
420 |
|
|
* manner, by ensuring that the type of the given {@link OpenType}
|
421 |
|
|
* matches the component type used in the type of the
|
422 |
|
|
* returned instance. If the given {@link OpenType} is a
|
423 |
|
|
* {@link SimpleType}, {@link CompositeType} or
|
424 |
|
|
* {@link TabularType}, then a 1-dimensional array of that
|
425 |
|
|
* type is returned. Otherwise, if the type is
|
426 |
|
|
* an {@link ArrayType} of n dimensions, the returned
|
427 |
|
|
* type is also an {@link ArrayType} but of n+1 dimensions.
|
428 |
|
|
* For example,
|
429 |
|
|
* {@code ArrayType.getArrayType(ArrayType.getArrayType(SimpleType.STRING))}
|
430 |
|
|
* returns a 2-dimensional array of {@link SimpleType#String}.
|
431 |
|
|
* </p>
|
432 |
|
|
* <p>
|
433 |
|
|
* This method caches its results, so that the same instance
|
434 |
|
|
* is returned from subsequent calls with the same parameters.
|
435 |
|
|
* </p>
|
436 |
|
|
*
|
437 |
|
|
* @param elementType the element type of the new array type.
|
438 |
|
|
* @throws OpenDataException if the class name of {@code elementType}
|
439 |
|
|
* is not in {@link OpenType#ALLOWED_CLASSNAMES_LIST}.
|
440 |
|
|
* @since 1.6
|
441 |
|
|
*/
|
442 |
|
|
@SuppressWarnings("unchecked")
|
443 |
|
|
public static <E> ArrayType<E[]> getArrayType(OpenType<E> elementType)
|
444 |
|
|
throws OpenDataException
|
445 |
|
|
{
|
446 |
|
|
ArrayType<E[]> arr = (ArrayType<E[]>) cache.get(elementType);
|
447 |
|
|
if (arr != null)
|
448 |
|
|
return arr;
|
449 |
|
|
arr = new ArrayType<E[]>(1, elementType);
|
450 |
|
|
cache.put(elementType, arr);
|
451 |
|
|
return arr;
|
452 |
|
|
}
|
453 |
|
|
|
454 |
|
|
/**
|
455 |
|
|
* <p>
|
456 |
|
|
* Returns a new {@link ArrayType} instance for the given
|
457 |
|
|
* primitive type in a type-safe* manner, by ensuring that
|
458 |
|
|
* the type of the given {@link OpenType} matches the type
|
459 |
|
|
* used in the returned instance. If the type is
|
460 |
|
|
* an array of n dimensions, the returned
|
461 |
|
|
* type is also an {@link ArrayType} of n dimensions.
|
462 |
|
|
* </p>
|
463 |
|
|
* <p>
|
464 |
|
|
* As an example, the array type returned by
|
465 |
|
|
* <code>getPrimitiveArrayType(Integer.TYPE)</code> has the
|
466 |
|
|
* following values:
|
467 |
|
|
* </p>
|
468 |
|
|
* <table>
|
469 |
|
|
* <th><td>Attribute</td><td>Value</td></th>
|
470 |
|
|
* <tr><td>Class Name</td><td><code>[I</code>
|
471 |
|
|
* </td></tr>
|
472 |
|
|
* <tr><td>Type Name</td><td><code>[I</code>
|
473 |
|
|
* </td></tr>
|
474 |
|
|
* <tr><td>Description</td><td><code>1-dimension array of int</code></td></tr>
|
475 |
|
|
* <tr><td>Element Type Class Name</td><td><code>java.lang.Integer</code>
|
476 |
|
|
* </td></tr>
|
477 |
|
|
* </table>
|
478 |
|
|
* <p>
|
479 |
|
|
* This method caches its results, so that the same instance
|
480 |
|
|
* is returned from subsequent calls with the same parameters.
|
481 |
|
|
* </p>
|
482 |
|
|
*
|
483 |
|
|
* @param type the type of the new {@link ArrayType}.
|
484 |
|
|
* @throws IllegalArgumentException if the type is not a primitive
|
485 |
|
|
* array.
|
486 |
|
|
* @since 1.6
|
487 |
|
|
*/
|
488 |
|
|
@SuppressWarnings("unchecked")
|
489 |
|
|
public static <T> ArrayType<T> getPrimitiveArrayType(Class<T> type)
|
490 |
|
|
{
|
491 |
|
|
ArrayType<T> arr = (ArrayType<T>) primCache.get(type);
|
492 |
|
|
if (arr != null)
|
493 |
|
|
return arr;
|
494 |
|
|
Class<?> comType = type;
|
495 |
|
|
int dim = 0;
|
496 |
|
|
do
|
497 |
|
|
{
|
498 |
|
|
comType = comType.getComponentType();
|
499 |
|
|
++dim;
|
500 |
|
|
if (comType == null)
|
501 |
|
|
throw new IllegalArgumentException("The given class is " +
|
502 |
|
|
"not an array.");
|
503 |
|
|
} while (comType.isArray());
|
504 |
|
|
try
|
505 |
|
|
{
|
506 |
|
|
arr = new ArrayType<T>(getPrimitiveType(comType), true);
|
507 |
|
|
}
|
508 |
|
|
catch (OpenDataException e)
|
509 |
|
|
{
|
510 |
|
|
throw new IllegalArgumentException("The array is not of a primitive " +
|
511 |
|
|
"type", e);
|
512 |
|
|
}
|
513 |
|
|
while (dim > 1)
|
514 |
|
|
try
|
515 |
|
|
{
|
516 |
|
|
arr = new ArrayType<T>(1, arr);
|
517 |
|
|
--dim;
|
518 |
|
|
}
|
519 |
|
|
catch (OpenDataException e)
|
520 |
|
|
{
|
521 |
|
|
throw (Error)
|
522 |
|
|
new InternalError("Couldn't generate extra dimensions").initCause(e);
|
523 |
|
|
}
|
524 |
|
|
primCache.put(type, arr);
|
525 |
|
|
return arr;
|
526 |
|
|
}
|
527 |
|
|
|
528 |
|
|
/**
|
529 |
|
|
* Returns the number of dimensions used by arrays
|
530 |
|
|
* of this type.
|
531 |
|
|
*
|
532 |
|
|
* @return the number of dimensions.
|
533 |
|
|
*/
|
534 |
|
|
public int getDimension()
|
535 |
|
|
{
|
536 |
|
|
return dimension;
|
537 |
|
|
}
|
538 |
|
|
|
539 |
|
|
/**
|
540 |
|
|
* Returns the open type descriptor which describes
|
541 |
|
|
* the type of the elements of this array type.
|
542 |
|
|
*
|
543 |
|
|
* @return the type of the elements.
|
544 |
|
|
*/
|
545 |
|
|
public OpenType<?> getElementOpenType()
|
546 |
|
|
{
|
547 |
|
|
return elementType;
|
548 |
|
|
}
|
549 |
|
|
|
550 |
|
|
/**
|
551 |
|
|
* <p>
|
552 |
|
|
* Returns the hash code of the array type.
|
553 |
|
|
* This is computed as the sum of the hash code of the
|
554 |
|
|
* element type together with the number of dimensions
|
555 |
|
|
* the array has and the primitive array flag. These
|
556 |
|
|
* are the same elements of the type that are compared as
|
557 |
|
|
* part of the {@link #equals(java.lang.Object)} method,
|
558 |
|
|
* thus ensuring that the hashcode is compatible with the
|
559 |
|
|
* equality test.
|
560 |
|
|
* </p>
|
561 |
|
|
* <p>
|
562 |
|
|
* As instances of this class are immutable, the hash code
|
563 |
|
|
* is computed just once for each instance and reused
|
564 |
|
|
* throughout its life.
|
565 |
|
|
* </p>
|
566 |
|
|
*
|
567 |
|
|
* @return the hash code of this instance.
|
568 |
|
|
*/
|
569 |
|
|
public int hashCode()
|
570 |
|
|
{
|
571 |
|
|
if (hashCode == null)
|
572 |
|
|
hashCode = Integer.valueOf(dimension +
|
573 |
|
|
elementType.hashCode() +
|
574 |
|
|
Boolean.valueOf(primitiveArray).hashCode());
|
575 |
|
|
return hashCode.intValue();
|
576 |
|
|
}
|
577 |
|
|
|
578 |
|
|
/**
|
579 |
|
|
* Returns true if this instance represents an array of
|
580 |
|
|
* a primitive type.
|
581 |
|
|
*
|
582 |
|
|
* @return true if the array is of a primitive type.
|
583 |
|
|
*/
|
584 |
|
|
public boolean isPrimitiveArray()
|
585 |
|
|
{
|
586 |
|
|
return primitiveArray;
|
587 |
|
|
}
|
588 |
|
|
|
589 |
|
|
/**
|
590 |
|
|
* <p>
|
591 |
|
|
* Returns true if the specified object is a member of this
|
592 |
|
|
* array type. The object is judged to be so if it is
|
593 |
|
|
* non-null, an array and one of the following two conditions
|
594 |
|
|
* holds:
|
595 |
|
|
* </p>
|
596 |
|
|
* <ul>
|
597 |
|
|
* <li>This {@link ArrayType} instance has a {@link SimpleType}
|
598 |
|
|
* as its element type. Thus, the object must have the same
|
599 |
|
|
* class name as that returned by {@link SimpleType#getClassName()}
|
600 |
|
|
* for this class.</li>
|
601 |
|
|
* <li>This {@link ArrayType} instance has a {@link CompositeType}
|
602 |
|
|
* or a {@link TabularType} as its element type. Thus, the object
|
603 |
|
|
* must be assignable to such an array, and have elements which
|
604 |
|
|
* are either null or valid values for the element type.</li>
|
605 |
|
|
* </ul>
|
606 |
|
|
*
|
607 |
|
|
* @param obj the object to test for membership.
|
608 |
|
|
* @return true if the object is a member of this type.
|
609 |
|
|
*/
|
610 |
|
|
public boolean isValue(Object obj)
|
611 |
|
|
{
|
612 |
|
|
if (obj == null)
|
613 |
|
|
return false;
|
614 |
|
|
Class<?> objClass = obj.getClass();
|
615 |
|
|
if (!(objClass.isArray()))
|
616 |
|
|
return false;
|
617 |
|
|
if (elementType instanceof SimpleType)
|
618 |
|
|
return getClassName().equals(objClass.getName());
|
619 |
|
|
Class<?> elementClass = null;
|
620 |
|
|
try
|
621 |
|
|
{
|
622 |
|
|
elementClass = Class.forName(getClassName());
|
623 |
|
|
}
|
624 |
|
|
catch (ClassNotFoundException e)
|
625 |
|
|
{
|
626 |
|
|
throw new IllegalStateException("The array type's element " +
|
627 |
|
|
"class could not be found.", e);
|
628 |
|
|
}
|
629 |
|
|
if (!(elementClass.isAssignableFrom(objClass)))
|
630 |
|
|
return false;
|
631 |
|
|
for (int a = 0; a < Array.getLength(obj); ++a)
|
632 |
|
|
{
|
633 |
|
|
Object elem = Array.get(obj, a);
|
634 |
|
|
if (elem != null &&
|
635 |
|
|
(!(elementType.isValue(elem))))
|
636 |
|
|
return false;
|
637 |
|
|
}
|
638 |
|
|
return true;
|
639 |
|
|
}
|
640 |
|
|
|
641 |
|
|
/**
|
642 |
|
|
* <p>
|
643 |
|
|
* Returns a textual representation of this instance. This
|
644 |
|
|
* is constructed using the class name
|
645 |
|
|
* (<code>javax.management.openmbean.ArrayType</code>)
|
646 |
|
|
* and each element of the instance which is relevant to
|
647 |
|
|
* the definition of {@link equals(java.lang.Object)} and
|
648 |
|
|
* {@link hashCode()} (i.e. the type name, the number of
|
649 |
|
|
* dimensions and the element type).
|
650 |
|
|
* </p>
|
651 |
|
|
* <p>
|
652 |
|
|
* As instances of this class are immutable, the return value
|
653 |
|
|
* is computed just once for each instance and reused
|
654 |
|
|
* throughout its life.
|
655 |
|
|
* </p>
|
656 |
|
|
*
|
657 |
|
|
* @return a @link{java.lang.String} instance representing
|
658 |
|
|
* the instance in textual form.
|
659 |
|
|
*/
|
660 |
|
|
public String toString()
|
661 |
|
|
{
|
662 |
|
|
if (string == null)
|
663 |
|
|
string = getClass().getName()
|
664 |
|
|
+ "[name=" + getTypeName()
|
665 |
|
|
+ ", dimension=" + dimension
|
666 |
|
|
+ ", elementType=" + elementType
|
667 |
|
|
+ ", primitiveArray=" + primitiveArray
|
668 |
|
|
+ "]";
|
669 |
|
|
return string;
|
670 |
|
|
}
|
671 |
|
|
|
672 |
|
|
}
|