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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package jdk.vm.ci.meta;
24
25 import java.lang.reflect.Field;
26 import java.lang.reflect.Modifier;
27
28 /**
29 * Miscellaneous collection of utility methods used by {@code jdk.vm.ci.meta} and its clients.
30 */
31 public class MetaUtil {
32
33 /**
34 * Extends the functionality of {@link Class#getSimpleName()} to include a non-empty string for
35 * anonymous and local classes.
36 *
37 * @param clazz the class for which the simple name is being requested
38 * @param withEnclosingClass specifies if the returned name should be qualified with the name(s)
39 * of the enclosing class/classes of {@code clazz} (if any). This option is ignored
40 * if {@code clazz} denotes an anonymous or local class.
41 * @return the simple name
42 */
43 public static String getSimpleName(Class<?> clazz, boolean withEnclosingClass) {
44 final String simpleName = clazz.getSimpleName();
45 if (simpleName.length() != 0) {
46 if (withEnclosingClass) {
47 String prefix = "";
209 result.append("V");
210 break;
211 default:
212 result.append("L").append(base.replace('.', '/')).append(";");
213 break;
214 }
215 return result.toString();
216 }
217
218 /**
219 * Gets a string representation of an object based soley on its class and its
220 * {@linkplain System#identityHashCode(Object) identity hash code}. This avoids and calls to
221 * virtual methods on the object such as {@link Object#hashCode()}.
222 */
223 public static String identityHashCodeString(Object obj) {
224 if (obj == null) {
225 return "null";
226 }
227 return obj.getClass().getName() + "@" + System.identityHashCode(obj);
228 }
229
230 /**
231 * Used to lookup constants from {@link Modifier} that are not public (VARARGS, SYNTHETIC etc.).
232 */
233 static int getNonPublicModifierStaticField(String name) {
234 try {
235 Field field = Modifier.class.getDeclaredField(name);
236 field.setAccessible(true);
237 return field.getInt(null);
238 } catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException e) {
239 throw new InternalError(e);
240 }
241 }
242 }
|
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package jdk.vm.ci.meta;
24
25 /**
26 * Miscellaneous collection of utility methods used by {@code jdk.vm.ci.meta} and its clients.
27 */
28 public class MetaUtil {
29
30 /**
31 * Extends the functionality of {@link Class#getSimpleName()} to include a non-empty string for
32 * anonymous and local classes.
33 *
34 * @param clazz the class for which the simple name is being requested
35 * @param withEnclosingClass specifies if the returned name should be qualified with the name(s)
36 * of the enclosing class/classes of {@code clazz} (if any). This option is ignored
37 * if {@code clazz} denotes an anonymous or local class.
38 * @return the simple name
39 */
40 public static String getSimpleName(Class<?> clazz, boolean withEnclosingClass) {
41 final String simpleName = clazz.getSimpleName();
42 if (simpleName.length() != 0) {
43 if (withEnclosingClass) {
44 String prefix = "";
206 result.append("V");
207 break;
208 default:
209 result.append("L").append(base.replace('.', '/')).append(";");
210 break;
211 }
212 return result.toString();
213 }
214
215 /**
216 * Gets a string representation of an object based soley on its class and its
217 * {@linkplain System#identityHashCode(Object) identity hash code}. This avoids and calls to
218 * virtual methods on the object such as {@link Object#hashCode()}.
219 */
220 public static String identityHashCodeString(Object obj) {
221 if (obj == null) {
222 return "null";
223 }
224 return obj.getClass().getName() + "@" + System.identityHashCode(obj);
225 }
226 }
|