001: /*
002: * Copyright (c) 2002-2007 JGoodies Karsten Lentzsch. All Rights Reserved.
003: *
004: * Redistribution and use in source and binary forms, with or without
005: * modification, are permitted provided that the following conditions are met:
006: *
007: * o Redistributions of source code must retain the above copyright notice,
008: * this list of conditions and the following disclaimer.
009: *
010: * o Redistributions in binary form must reproduce the above copyright notice,
011: * this list of conditions and the following disclaimer in the documentation
012: * and/or other materials provided with the distribution.
013: *
014: * o Neither the name of JGoodies Karsten Lentzsch nor the names of
015: * its contributors may be used to endorse or promote products derived
016: * from this software without specific prior written permission.
017: *
018: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
019: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
020: * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
021: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
022: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
023: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
024: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
025: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
026: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
027: * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
028: * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029: */
030:
031: package com.jgoodies.binding.tests.event;
032:
033: import java.util.LinkedList;
034: import java.util.List;
035: import java.util.ListIterator;
036:
037: import javax.swing.event.ListSelectionEvent;
038: import javax.swing.event.ListSelectionListener;
039:
040: /**
041: * A ListDataListener that stores the received ListDataEvents.
042: *
043: * @author Karsten Lentzsch
044: * @version $Revision: 1.8 $
045: */
046: public final class ListSelectionReport implements ListSelectionListener {
047:
048: /**
049: * Holds a list of all received ListSelectionEvent.
050: */
051: private final List<ListSelectionEvent> allEvents = new LinkedList<ListSelectionEvent>();
052:
053: // Implementing the ListSelectionListener Interface ***************************
054:
055: /**
056: * Called whenever the value of the selection changes.
057: *
058: * @param evt the event that characterizes the change.
059: */
060: public void valueChanged(ListSelectionEvent evt) {
061: allEvents.add(0, evt);
062: }
063:
064: // Public Report API *****************************************************
065:
066: public ListSelectionEvent lastEvent() {
067: return allEvents.isEmpty() ? null : allEvents.get(0);
068: }
069:
070: public List<ListSelectionEvent> eventList() {
071: return allEvents;
072: }
073:
074: public int eventCount() {
075: return allEvents.size();
076: }
077:
078: public boolean hasEvents() {
079: return !allEvents.isEmpty();
080: }
081:
082: // ************************************************************************
083:
084: /**
085: * Compares this report's event list with the event list
086: * of the given object and ignores the source of the contained
087: * ListDataEvents that may differ.
088: *
089: * @param o the object to compare with
090: * @return true if equal, false if not
091: *
092: * @see java.util.AbstractList#equals(Object)
093: */
094: @Override
095: public boolean equals(Object o) {
096: if (o == this )
097: return true;
098: if (!(o instanceof ListSelectionReport))
099: return false;
100:
101: ListIterator<ListSelectionEvent> e1 = eventList()
102: .listIterator();
103: ListIterator<ListSelectionEvent> e2 = ((ListSelectionReport) o)
104: .eventList().listIterator();
105: while (e1.hasNext() && e2.hasNext()) {
106: ListSelectionEvent evt1 = e1.next();
107: ListSelectionEvent evt2 = e2.next();
108: if (!equalListDataEvents(evt1, evt2))
109: return false;
110: }
111: return !(e1.hasNext() || e2.hasNext());
112: }
113:
114: /**
115: * Poor but valid implementation. Won't be used.
116: *
117: * @return this report's hash code
118: */
119: @Override
120: public int hashCode() {
121: return eventList().size();
122: }
123:
124: /**
125: * Checks and answers whether the two given ListSelectionEvents have
126: * the same first and last index. The source and adjusting state may differ.
127: */
128: private boolean equalListDataEvents(ListSelectionEvent evt1,
129: ListSelectionEvent evt2) {
130: return evt1.getFirstIndex() == evt2.getFirstIndex()
131: && evt1.getLastIndex() == evt2.getLastIndex();
132: }
133:
134: }
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