annotate src/org/tmatesoft/hg/internal/AdapterPlug.java @ 609:e4a71afd3c71

Test TODOs: test for ConfigFile (covering %include and %unset directives)
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 08 May 2013 17:11:45 +0200
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1 /*
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2 * Copyright (c) 2012-2013 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.internal;
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19 import java.util.ArrayList;
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20 import java.util.HashMap;
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21 import java.util.List;
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22 import java.util.Map;
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24 import org.tmatesoft.hg.util.Adaptable;
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26 /**
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27 * Implementation of {@link Adaptable} that allows to add ("plug")
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28 * adapters as needed
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29 *
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30 * @author Artem Tikhomirov
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31 * @author TMate Software Ltd.
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32 */
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33 public class AdapterPlug implements Adaptable {
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34 private final Map<Class<?>, Object> adapters = new HashMap<Class<?>, Object>();
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35 private final List<Class<?>> adapterUses = new ArrayList<Class<?>>();
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37 public <T> void attachAdapter(Class<T> adapterClass, T instance) {
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38 adapters.put(adapterClass, instance);
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39 }
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41 @SuppressWarnings("unchecked")
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42 public <T> T detachAdapter(Class<T> adapterClass) {
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43 return (T) adapters.remove(adapterClass);
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44 }
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46 public <T> T getAdapter(Class<T> adapterClass) {
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47 Object instance = adapters.get(adapterClass);
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48 if (instance != null) {
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49 adapterUses.add(adapterClass);
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50 return adapterClass.cast(instance);
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51 }
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52 return null;
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53 }
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55 public int getAdapterUse(Class<?> adapterClass) {
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56 int uses = 0;
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57 for (Class<?> c : adapterUses) {
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58 if (c == adapterClass) {
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59 uses++;
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60 }
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61 }
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62 return uses;
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63 }
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64 }