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.base;
28:
29: import java.util.ArrayList;
30:
31: import org.cougaar.mts.std.AspectFactory;
32: import org.cougaar.mts.std.AttributedMessage;
33:
34: /**
35: * This factory is used to create MessageReaders and MessageWriters
36: * with a specific list of Aspects. It's not a service primarily
37: * because the only client is {@link AttributedMessage}, which has no
38: * ready access to a ServiceBroker.
39: */
40: public final class MessageStreamsFactory extends AspectFactory {
41: private static MessageStreamsFactory factory;
42:
43: public static synchronized MessageStreamsFactory makeFactory() {
44: factory = new MessageStreamsFactory();
45: return factory;
46: }
47:
48: public static synchronized MessageStreamsFactory getFactory() {
49: return factory;
50: }
51:
52: private MessageStreamsFactory() {
53: }
54:
55: public MessageReader getMessageReader(ArrayList aspectNames) {
56: MessageReader rdr = new MessageReaderImpl();
57: return (MessageReader) attachAspects(rdr, MessageReader.class,
58: aspectNames);
59: }
60:
61: public MessageWriter getMessageWriter(ArrayList aspectNames) {
62: MessageWriter wtr = new MessageWriterImpl();
63: return (MessageWriter) attachAspects(wtr, MessageWriter.class,
64: aspectNames);
65: }
66:
67: /**
68: * Free resources
69: */
70: public void releaseFactory() {
71: // Nullify static variable so it can be reclaimed by the garbage
72: // collector.
73: factory = null;
74: }
75:
76: }
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