01: /*
02: * <copyright>
03: *
04: * Copyright 2003-2004 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: package org.cougaar.lib.aggagent.session;
27:
28: import java.util.Collection;
29: import java.util.Iterator;
30: import java.util.List;
31:
32: /**
33: * XmlIncrement is an IncrementFormat implementation that uses the XMLEncoder
34: * (q.v.) interface to encode individual objects found on the blackboard.
35: * Every UpdateDelta formatted by the encode method of this class will be in
36: * increment mode (i.e., with "added", "changed", and "removed" lists).
37: */
38: public class XmlIncrement implements IncrementFormat {
39: private XMLEncoder xmlEncoder = null;
40:
41: /**
42: * Create a new XmlIncrement. The provided XMLEncoder implementation sets
43: * the behavior for this instance.
44: */
45: public XmlIncrement(XMLEncoder coder) {
46: if (coder == null)
47: throw new IllegalArgumentException(
48: "cannot accept a null XMLEncoder");
49:
50: xmlEncoder = coder;
51: }
52:
53: /**
54: * Encode the latest subscription information as an UpdateDelta. The
55: * Objects found in the "added", "changed", and "removed" lists of the
56: * SubscriptionAccess are each converted to ResultSetDataAtoms, which are
57: * then added to the appropriate list in the UpdateDelta.
58: */
59: public void encode(UpdateDelta out, SubscriptionAccess sacc) {
60: out.setReplacement(false);
61: sendBunch(sacc.getAddedCollection(), out.getAddedList());
62: sendBunch(sacc.getChangedCollection(), out.getChangedList());
63: sendBunch(sacc.getRemovedCollection(), out.getRemovedList());
64: }
65:
66: private void sendBunch(Collection c, List out) {
67: for (Iterator i = c.iterator(); i.hasNext();)
68: xmlEncoder.encode(i.next(), out);
69: }
70: }
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