26 package java.lang.reflect;
27
28 import java.security.AccessController;
29 import sun.reflect.LangReflectAccess;
30 import sun.reflect.ReflectionFactory;
31
32 /**
33 * The Modifier class provides {@code static} methods and
34 * constants to decode class and member access modifiers. The sets of
35 * modifiers are represented as integers with distinct bit positions
36 * representing different modifiers. The values for the constants
37 * representing the modifiers are taken from the tables in sections 4.1, 4.4, 4.5, and 4.7 of
38 * <cite>The Java™ Virtual Machine Specification</cite>.
39 *
40 * @see Class#getModifiers()
41 * @see Member#getModifiers()
42 *
43 * @author Nakul Saraiya
44 * @author Kenneth Russell
45 */
46 public
47 class Modifier {
48
49 /*
50 * Bootstrapping protocol between java.lang and java.lang.reflect
51 * packages
52 */
53 static {
54 sun.reflect.ReflectionFactory factory =
55 AccessController.doPrivileged(
56 new ReflectionFactory.GetReflectionFactoryAction());
57 factory.setLangReflectAccess(new java.lang.reflect.ReflectAccess());
58 }
59
60 /**
61 * Return {@code true} if the integer argument includes the
62 * {@code public} modifier, {@code false} otherwise.
63 *
64 * @param mod a set of modifiers
65 * @return {@code true} if {@code mod} includes the
66 * {@code public} modifier; {@code false} otherwise.
67 */
216 * volatile synchronized native strictfp
217 * interface } </blockquote>
218 * The {@code interface} modifier discussed in this class is
219 * not a true modifier in the Java language and it appears after
220 * all other modifiers listed by this method. This method may
221 * return a string of modifiers that are not valid modifiers of a
222 * Java entity; in other words, no checking is done on the
223 * possible validity of the combination of modifiers represented
224 * by the input.
225 *
226 * Note that to perform such checking for a known kind of entity,
227 * such as a constructor or method, first AND the argument of
228 * {@code toString} with the appropriate mask from a method like
229 * {@link #constructorModifiers} or {@link #methodModifiers}.
230 *
231 * @param mod a set of modifiers
232 * @return a string representation of the set of modifiers
233 * represented by {@code mod}
234 */
235 public static String toString(int mod) {
236 StringBuffer sb = new StringBuffer();
237 int len;
238
239 if ((mod & PUBLIC) != 0) sb.append("public ");
240 if ((mod & PROTECTED) != 0) sb.append("protected ");
241 if ((mod & PRIVATE) != 0) sb.append("private ");
242
243 /* Canonical order */
244 if ((mod & ABSTRACT) != 0) sb.append("abstract ");
245 if ((mod & STATIC) != 0) sb.append("static ");
246 if ((mod & FINAL) != 0) sb.append("final ");
247 if ((mod & TRANSIENT) != 0) sb.append("transient ");
248 if ((mod & VOLATILE) != 0) sb.append("volatile ");
249 if ((mod & SYNCHRONIZED) != 0) sb.append("synchronized ");
250 if ((mod & NATIVE) != 0) sb.append("native ");
251 if ((mod & STRICT) != 0) sb.append("strictfp ");
252 if ((mod & INTERFACE) != 0) sb.append("interface ");
253
254 if ((len = sb.length()) > 0) /* trim trailing space */
255 return sb.toString().substring(0, len-1);
256 return "";
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26 package java.lang.reflect;
27
28 import java.security.AccessController;
29 import sun.reflect.LangReflectAccess;
30 import sun.reflect.ReflectionFactory;
31
32 /**
33 * The Modifier class provides {@code static} methods and
34 * constants to decode class and member access modifiers. The sets of
35 * modifiers are represented as integers with distinct bit positions
36 * representing different modifiers. The values for the constants
37 * representing the modifiers are taken from the tables in sections 4.1, 4.4, 4.5, and 4.7 of
38 * <cite>The Java™ Virtual Machine Specification</cite>.
39 *
40 * @see Class#getModifiers()
41 * @see Member#getModifiers()
42 *
43 * @author Nakul Saraiya
44 * @author Kenneth Russell
45 */
46 public class Modifier {
47
48 /*
49 * Bootstrapping protocol between java.lang and java.lang.reflect
50 * packages
51 */
52 static {
53 sun.reflect.ReflectionFactory factory =
54 AccessController.doPrivileged(
55 new ReflectionFactory.GetReflectionFactoryAction());
56 factory.setLangReflectAccess(new java.lang.reflect.ReflectAccess());
57 }
58
59 /**
60 * Return {@code true} if the integer argument includes the
61 * {@code public} modifier, {@code false} otherwise.
62 *
63 * @param mod a set of modifiers
64 * @return {@code true} if {@code mod} includes the
65 * {@code public} modifier; {@code false} otherwise.
66 */
215 * volatile synchronized native strictfp
216 * interface } </blockquote>
217 * The {@code interface} modifier discussed in this class is
218 * not a true modifier in the Java language and it appears after
219 * all other modifiers listed by this method. This method may
220 * return a string of modifiers that are not valid modifiers of a
221 * Java entity; in other words, no checking is done on the
222 * possible validity of the combination of modifiers represented
223 * by the input.
224 *
225 * Note that to perform such checking for a known kind of entity,
226 * such as a constructor or method, first AND the argument of
227 * {@code toString} with the appropriate mask from a method like
228 * {@link #constructorModifiers} or {@link #methodModifiers}.
229 *
230 * @param mod a set of modifiers
231 * @return a string representation of the set of modifiers
232 * represented by {@code mod}
233 */
234 public static String toString(int mod) {
235 StringBuilder sb = new StringBuilder();
236 int len;
237
238 if ((mod & PUBLIC) != 0) sb.append("public ");
239 if ((mod & PROTECTED) != 0) sb.append("protected ");
240 if ((mod & PRIVATE) != 0) sb.append("private ");
241
242 /* Canonical order */
243 if ((mod & ABSTRACT) != 0) sb.append("abstract ");
244 if ((mod & STATIC) != 0) sb.append("static ");
245 if ((mod & FINAL) != 0) sb.append("final ");
246 if ((mod & TRANSIENT) != 0) sb.append("transient ");
247 if ((mod & VOLATILE) != 0) sb.append("volatile ");
248 if ((mod & SYNCHRONIZED) != 0) sb.append("synchronized ");
249 if ((mod & NATIVE) != 0) sb.append("native ");
250 if ((mod & STRICT) != 0) sb.append("strictfp ");
251 if ((mod & INTERFACE) != 0) sb.append("interface ");
252
253 if ((len = sb.length()) > 0) /* trim trailing space */
254 return sb.toString().substring(0, len-1);
255 return "";
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