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.mts.std;
28:
29: import java.util.ArrayList;
30: import org.cougaar.mts.base.MessageTransportAspect;
31: import org.cougaar.mts.base.StandardAspect;
32: import org.cougaar.core.component.Service;
33:
34: /**
35: * This is an MTS-internal utility service which supports the use of
36: * aspects. It's used to add new aspects, typically at load time, and
37: * to attach aspect delegates at run time.
38: */
39: public interface AspectSupport extends Service {
40: /**
41: * Return an aspect object whose class is as given. If there's
42: * more than one, returns the last one added. If there are none,
43: * return null.
44: */
45: MessageTransportAspect findAspect(String classname);
46:
47: /**
48: * Add an aspect to the global list.
49: */
50: void addAspect(MessageTransportAspect aspect);
51:
52: /**
53: * Add an aspect to the global list. This method is vestigial,
54: * since StandardAspects are also MessageTransportAspects.
55: */
56: void addAspect(StandardAspect aspect);
57:
58: /**
59: * Allow each global aspect to attach a delegate to given
60: * object at the cut-point indictated by the given type.
61: */
62: Object attachAspects(Object object, Class type);
63:
64: /**
65: * Allow each aspect in the list of canidates to attach a delegate
66: * to given object at the cut-point indictated by the given type.
67: */
68: Object attachAspects(Object delegate, Class type,
69: ArrayList candidates);
70: }
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