17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.lang.annotation;
27
28 /**
29 * The common interface extended by all annotation types. Note that an
30 * interface that manually extends this one does <i>not</i> define
31 * an annotation type. Also note that this interface does not itself
32 * define an annotation type.
33 *
34 * More information about annotation types can be found in section 9.6 of
35 * <cite>The Java™ Language Specification</cite>.
36 *
37 * @author Josh Bloch
38 * @since 1.5
39 */
40 public interface Annotation {
41 /**
42 * Returns true if the specified object represents an annotation
43 * that is logically equivalent to this one. In other words,
44 * returns true if the specified object is an instance of the same
45 * annotation type as this instance, all of whose members are equal
46 * to the corresponding member of this annotation, as defined below:
47 * <ul>
48 * <li>Two corresponding primitive typed members whose values are
49 * <tt>x</tt> and <tt>y</tt> are considered equal if <tt>x == y</tt>,
50 * unless their type is <tt>float</tt> or <tt>double</tt>.
51 *
52 * <li>Two corresponding <tt>float</tt> members whose values
53 * are <tt>x</tt> and <tt>y</tt> are considered equal if
54 * <tt>Float.valueOf(x).equals(Float.valueOf(y))</tt>.
55 * (Unlike the <tt>==</tt> operator, NaN is considered equal
56 * to itself, and <tt>0.0f</tt> unequal to <tt>-0.0f</tt>.)
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17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.lang.annotation;
27
28 /**
29 * The common interface extended by all annotation types. Note that an
30 * interface that manually extends this one does <i>not</i> define
31 * an annotation type. Also note that this interface does not itself
32 * define an annotation type.
33 *
34 * More information about annotation types can be found in section 9.6 of
35 * <cite>The Java™ Language Specification</cite>.
36 *
37 * The {@link java.lang.reflect.AnnotatedElement} interface discusses
38 * compatibility concerns when evolving an annotation type from being
39 * non-repeatable to being repeatable.
40 *
41 * @author Josh Bloch
42 * @since 1.5
43 */
44 public interface Annotation {
45 /**
46 * Returns true if the specified object represents an annotation
47 * that is logically equivalent to this one. In other words,
48 * returns true if the specified object is an instance of the same
49 * annotation type as this instance, all of whose members are equal
50 * to the corresponding member of this annotation, as defined below:
51 * <ul>
52 * <li>Two corresponding primitive typed members whose values are
53 * <tt>x</tt> and <tt>y</tt> are considered equal if <tt>x == y</tt>,
54 * unless their type is <tt>float</tt> or <tt>double</tt>.
55 *
56 * <li>Two corresponding <tt>float</tt> members whose values
57 * are <tt>x</tt> and <tt>y</tt> are considered equal if
58 * <tt>Float.valueOf(x).equals(Float.valueOf(y))</tt>.
59 * (Unlike the <tt>==</tt> operator, NaN is considered equal
60 * to itself, and <tt>0.0f</tt> unequal to <tt>-0.0f</tt>.)
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