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More lazy initialization done for FieldAttributes.

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This commit is contained in:
Joel Leitch 2009-12-03 22:28:58 +00:00
parent 641390b1a1
commit 33e816dcf0
1 changed files with 16 additions and 1 deletions
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17
gson/src/main/java/com/google/gson/FieldAttributes.java
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@ -39,6 +39,7 @@ public final class FieldAttributes {
private Class<?> declaredType; private Class<?> declaredType;
private Integer modifiers; private Integer modifiers;
private Boolean isSynthetic; private Boolean isSynthetic;
private Annotation[] annotations;
/** /**
* Constructs a Field Attributes object from the {@code f}. * Constructs a Field Attributes object from the {@code f}.
@ -114,7 +115,10 @@ public final class FieldAttributes {
* @return the annotation instance if it is bound to the field; otherwise {@code null} * @return the annotation instance if it is bound to the field; otherwise {@code null}
*/ */
public <T extends Annotation> T getAnnotation(Class<T> annotation) { public <T extends Annotation> T getAnnotation(Class<T> annotation) {
return field.getAnnotation(annotation); if (annotations == null) {
annotations = field.getAnnotations();
}
return getAnnotationFromArray(annotations, annotation);
} }
/** /**
@ -145,4 +149,15 @@ public final class FieldAttributes {
} }
return isSynthetic; return isSynthetic;
} }
@SuppressWarnings("unchecked")
private static <T extends Annotation> T getAnnotationFromArray(
Annotation[] annotations, Class<T> annotation) {
for (Annotation a : annotations) {
if (a.annotationType() == annotation) {
return (T) a;
}
}
return null;
}
} }