01: // Copyright 2004, 2005 The Apache Software Foundation
02: //
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: package org.apache.hivemind.lib;
16:
17: /**
18: * Builds a default implementation of an interface. The fabricated class has no-op
19: * implementions for each method in the interface. Non-void methods return null,
20: * false or zero. A cached, shared instance of the empty implementation is kept and will
21: * be returned on future invocations.
22: *
23: * @author Howard Lewis Ship
24: */
25: public interface DefaultImplementationBuilder {
26: /**
27: * Builds a default implementation of the indicated interface, instantiates and returns it.
28: * Results are cached for later re-use.
29: *
30: * @throws org.apache.hivemind.ApplicationRuntimeException if interfaceType is not an interface.
31: */
32: public Object buildDefaultImplementation(Class interfaceType);
33: }
|