01: /**********************************************************************
02: Copyright (c) 2007 Andy Jefferson and others. All rights reserved.
03: Licensed under the Apache License, Version 2.0 (the "License");
04: you may not use this file except in compliance with the License.
05: You may obtain a copy of the License at
06:
07: http://www.apache.org/licenses/LICENSE-2.0
08:
09: Unless required by applicable law or agreed to in writing, software
10: distributed under the License is distributed on an "AS IS" BASIS,
11: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12: See the License for the specific language governing permissions and
13: limitations under the License.
14:
15: Contributors:
16: ...
17: **********************************************************************/package org.jpox.sco.queued;
18:
19: import org.jpox.StateManager;
20: import org.jpox.store.scostore.CollectionStore;
21: import org.jpox.store.scostore.MapStore;
22: import org.jpox.store.scostore.Store;
23:
24: /**
25: * Clear operation for a collection or map.
26: *
27: * @version $Revision: 1.2 $
28: */
29: public class ClearOperation implements QueuedOperation {
30: /**
31: * Perform the add(Object) operation on the specified backing store.
32: * @param store The backing store to perform it on
33: * @param sm StateManager for the owner of the container
34: */
35: public void perform(Store store, StateManager sm) {
36: if (store instanceof CollectionStore) {
37: ((CollectionStore) store).clear(sm);
38: } else if (store instanceof MapStore) {
39: ((MapStore) store).clear(sm);
40: }
41: }
42: }
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