01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one
03: * or more contributor license agreements. See the NOTICE file
04: * distributed with this work for additional information
05: * regarding copyright ownership. The ASF licenses this file
06: * to you under the Apache License, Version 2.0 (the
07: * "License"); you may not use this file except in compliance
08: * with the License. You may obtain a copy of the License at
09: *
10: * http://www.apache.org/licenses/LICENSE-2.0
11: *
12: * Unless required by applicable law or agreed to in writing,
13: * software distributed under the License is distributed on an
14: * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15: * KIND, either express or implied. See the License for the
16: * specific language governing permissions and limitations
17: * under the License.
18: */
19: package org.apache.openjpa.kernel;
20:
21: /**
22: * Allows facades to control the particulars of the find operation
23: * through callbacks.
24: *
25: * @author Abe White
26: */
27: public interface FindCallbacks {
28:
29: /**
30: * Process find argument. Throw proper
31: * {@link org.apache.openjpa.util.OpenJPAException} for illegal value.
32: *
33: * @return the id to look up, or null to ignore this argument
34: */
35: public Object processArgument(Object oid);
36:
37: /**
38: * Process operation return value.
39: *
40: * @return the object to return
41: */
42: public Object processReturn(Object oid, OpenJPAStateManager sm);
43: }
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