Mercurial > hg4j
annotate src/org/tmatesoft/hg/internal/AdapterPlug.java @ 708:4ffc17c0b534
Merge: tests for resolver and complex scenario. Enable commit for merged revisions. Reuse file revisions if nothing changed
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Tue, 20 Aug 2013 18:41:34 +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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18 |
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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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23 |
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24 import org.tmatesoft.hg.util.Adaptable; |
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25 |
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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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36 |
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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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40 |
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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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45 |
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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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54 |
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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 } |