01: /*
02: * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * by Sun in the LICENSE file that accompanied this code.
10: *
11: * This code is distributed in the hope that it will be useful, but WITHOUT
12: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14: * version 2 for more details (a copy is included in the LICENSE file that
15: * accompanied this code).
16: *
17: * You should have received a copy of the GNU General Public License version
18: * 2 along with this work; if not, write to the Free Software Foundation,
19: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20: *
21: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22: * CA 95054 USA or visit www.sun.com if you need additional information or
23: * have any questions.
24: */
25:
26: package com.sun.xml.internal.bind.v2.schemagen;
27:
28: import java.util.TreeMap;
29: import java.util.Map;
30:
31: /**
32: * A special {@link Map} that 'conceptually' stores a set of values for each key.
33: *
34: * <p>
35: * When multiple values are stored, however, this class doesn't let the caller
36: * see individual values, and instead it returns a specially designated "MANY" value,
37: * which is given as a parameter to the constructor.
38: *
39: * @author Kohsuke Kawaguchi
40: */
41: final class MultiMap<K extends Comparable<K>, V> extends TreeMap<K, V> {
42: private final V many;
43:
44: public MultiMap(V many) {
45: this .many = many;
46: }
47:
48: @Override
49: public V put(K key, V value) {
50: V old = super .put(key, value);
51: if (old != null && !old.equals(value)) {
52: // different value stored
53: super .put(key, many);
54: }
55: return old;
56: }
57:
58: @Override
59: public void putAll(Map<? extends K, ? extends V> map) {
60: throw new UnsupportedOperationException();
61: }
62: }
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