01: /*
02: * <copyright>
03: *
04: * Copyright 2002-2004 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.core.relay;
28:
29: import org.cougaar.core.mts.MessageAddress;
30: import org.cougaar.core.util.UID;
31:
32: /**
33: * Target-side implementation of {@link SimpleRelay}, constructed
34: * by the {@link SimpleRelaySource}.
35: * <p>
36: * @see SimpleRelaySource for implementation notes
37: */
38: public final class SimpleRelayTarget extends SimpleRelayBase implements
39: Relay.Target {
40:
41: // constructor:
42: public SimpleRelayTarget(UID uid, MessageAddress source,
43: MessageAddress target, Object query) {
44: super (uid, source, target);
45: this .query = query;
46: }
47:
48: // prevent "setQuery", since this is the target-side instance.
49: // Only "updateContent" from the source can change the content.
50: public void setQuery(Object reply) {
51: throw new UnsupportedOperationException(
52: "Unable to modify the query on the target-side, "
53: + "it can only be set at the source (" + source
54: + ")");
55: }
56:
57: // implement Relay.Target:
58: public Object getResponse() {
59: return reply;
60: }
61:
62: public int updateContent(Object content, Token token) {
63: // assert content != null
64: this.query = content;
65: return Relay.CONTENT_CHANGE;
66: }
67: }
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