01: /*
02: * (c) Copyright 2007 by Volker Bergmann. All rights reserved.
03: *
04: * Redistribution and use in source and binary forms, with or without
05: * modification, is permitted under the terms of the
06: * GNU General Public License.
07: *
08: * For redistributing this software or a derivative work under a license other
09: * than the GPL-compatible Free Software License as defined by the Free
10: * Software Foundation or approved by OSI, you must first obtain a commercial
11: * license to this software product from Volker Bergmann.
12: *
13: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
14: * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
15: * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
16: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
17: * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
18: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24: * POSSIBILITY OF SUCH DAMAGE.
25: */
26:
27: package org.databene.model.depend;
28:
29: import java.util.ArrayList;
30: import java.util.List;
31:
32: /**
33: * Abstract class that provides partial featur implementation of the Dependent interface.
34: * @author Volker Bergmann
35: * @since 0.3.04
36: * @param <E>
37: */
38: public abstract class AbstractDependent<E extends Dependent<E>>
39: implements Dependent<E> {
40:
41: protected List<ProviderInfo<E>> providers;
42:
43: public AbstractDependent(E... requiredProviders) {
44: this .providers = new ArrayList<ProviderInfo<E>>();
45: for (E requiredProvider : requiredProviders)
46: addRequiredProvider(requiredProvider);
47: }
48:
49: public void addRequiredProvider(E provider) {
50: providers.add(new ProviderInfo<E>(provider, true));
51: }
52:
53: public void addOptionalProvider(E provider) {
54: providers.add(new ProviderInfo<E>(provider, false));
55: }
56:
57: // Dependent interface --------------------------------------------------------------------------
58:
59: public int countProviders() {
60: return providers.size();
61: }
62:
63: public E getProvider(int index) {
64: return providers.get(index).getProvider();
65: }
66:
67: public boolean requiresProvider(int index) {
68: return providers.get(index).isRequired();
69: }
70:
71: }
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