01: /*
02: * <copyright>
03: *
04: * Copyright 1997-2004 BBNT Solutions, LLC
05: * under sponsorship of the Defense Advanced Research Projects
06: * Agency (DARPA).
07: *
08: * You can redistribute this software and/or modify it under the
09: * terms of the Cougaar Open Source License as published on the
10: * Cougaar Open Source Website (www.cougaar.org).
11: *
12: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
13: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
14: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
15: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
16: * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
17: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
18: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
22: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23: *
24: * </copyright>
25: */
26:
27: package org.cougaar.lib.callback;
28:
29: import java.util.Collection;
30:
31: import org.cougaar.core.blackboard.IncrementalSubscription;
32: import org.cougaar.util.UnaryPredicate;
33:
34: /**
35: * Root callback listener. The only thing the callback needs from
36: * all listeners is that they be able to create a subscription.
37: *
38: * Note that this could extend org.cougaar.planning.plugin.legacy.PluginDelegate, and
39: * then we could get the subscribe method, but we would also get
40: * all the other delegate methods, cluttering the interface.
41: *
42: * However, if we find that we need listeners to have a lot of the
43: * methods from PluginDelegate (e.g. publishAdd, publishChange),
44: * then we might want to revisit this.
45: *
46: * GWFV 6/1/99
47: */
48:
49: public interface UTILFilterCallbackListener {
50: /** only thing we need from listener is way to make a subscription */
51: IncrementalSubscription subscribeFromCallback(UnaryPredicate pred);
52:
53: /**
54: * Sometimes a listener wants to use a special container to put the
55: * objects in.
56: *
57: * See the second constructor in UTILFilterCallbackAdapter
58: */
59: IncrementalSubscription subscribeFromCallback(UnaryPredicate pred,
60: Collection specialContainer);
61:
62: }
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