27
28 import sun.java2d.StateTrackable.State;
29 import static sun.java2d.StateTrackable.State.*;
30
31 /**
32 * This class provides a basic pre-packaged implementation of the
33 * complete {@link StateTrackable} interface with implementations
34 * of the required methods in the interface and methods to manage
35 * transitions in the state of the object.
36 * Classes which wish to implement StateTrackable could create an
37 * instance of this class and delegate all of their implementations
38 * for {@code StateTrackable} methods to the corresponding methods
39 * of this class.
40 */
41 public final class StateTrackableDelegate implements StateTrackable {
42 /**
43 * The {@code UNTRACKABLE_DELEGATE} provides an implementation
44 * of the StateTrackable interface that is permanently in the
45 * {@link State#UNTRACKABLE UNTRACKABLE} state.
46 */
47 public final static StateTrackableDelegate UNTRACKABLE_DELEGATE =
48 new StateTrackableDelegate(UNTRACKABLE);
49
50 /**
51 * The {@code IMMUTABLE_DELEGATE} provides an implementation
52 * of the StateTrackable interface that is permanently in the
53 * {@link State#IMMUTABLE IMMUTABLE} state.
54 */
55 public final static StateTrackableDelegate IMMUTABLE_DELEGATE =
56 new StateTrackableDelegate(IMMUTABLE);
57
58 /**
59 * Returns a {@code StateTrackableDelegate} instance with the
60 * specified initial {@link State State}.
61 * If the specified {@code State} is
62 * {@link State#UNTRACKABLE UNTRACKABLE} or
63 * {@link State#IMMUTABLE IMMUTABLE}
64 * then the approprirate static instance
65 * {@link #UNTRACKABLE_DELEGATE} or {@link #IMMUTABLE_DELEGATE}
66 * is returned.
67 */
68 public static StateTrackableDelegate createInstance(State state) {
69 switch (state) {
70 case UNTRACKABLE:
71 return UNTRACKABLE_DELEGATE;
72 case STABLE:
73 return new StateTrackableDelegate(STABLE);
74 case DYNAMIC:
75 return new StateTrackableDelegate(DYNAMIC);
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27
28 import sun.java2d.StateTrackable.State;
29 import static sun.java2d.StateTrackable.State.*;
30
31 /**
32 * This class provides a basic pre-packaged implementation of the
33 * complete {@link StateTrackable} interface with implementations
34 * of the required methods in the interface and methods to manage
35 * transitions in the state of the object.
36 * Classes which wish to implement StateTrackable could create an
37 * instance of this class and delegate all of their implementations
38 * for {@code StateTrackable} methods to the corresponding methods
39 * of this class.
40 */
41 public final class StateTrackableDelegate implements StateTrackable {
42 /**
43 * The {@code UNTRACKABLE_DELEGATE} provides an implementation
44 * of the StateTrackable interface that is permanently in the
45 * {@link State#UNTRACKABLE UNTRACKABLE} state.
46 */
47 public static final StateTrackableDelegate UNTRACKABLE_DELEGATE =
48 new StateTrackableDelegate(UNTRACKABLE);
49
50 /**
51 * The {@code IMMUTABLE_DELEGATE} provides an implementation
52 * of the StateTrackable interface that is permanently in the
53 * {@link State#IMMUTABLE IMMUTABLE} state.
54 */
55 public static final StateTrackableDelegate IMMUTABLE_DELEGATE =
56 new StateTrackableDelegate(IMMUTABLE);
57
58 /**
59 * Returns a {@code StateTrackableDelegate} instance with the
60 * specified initial {@link State State}.
61 * If the specified {@code State} is
62 * {@link State#UNTRACKABLE UNTRACKABLE} or
63 * {@link State#IMMUTABLE IMMUTABLE}
64 * then the approprirate static instance
65 * {@link #UNTRACKABLE_DELEGATE} or {@link #IMMUTABLE_DELEGATE}
66 * is returned.
67 */
68 public static StateTrackableDelegate createInstance(State state) {
69 switch (state) {
70 case UNTRACKABLE:
71 return UNTRACKABLE_DELEGATE;
72 case STABLE:
73 return new StateTrackableDelegate(STABLE);
74 case DYNAMIC:
75 return new StateTrackableDelegate(DYNAMIC);
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