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annotate hg4j/src/main/java/org/tmatesoft/hg/internal/Pool.java @ 213:6ec4af642ba8 gradle

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Project uses Gradle for build - actual changes
author Alexander Kitaev <kitaev@gmail.com>
date Tue, 10 May 2011 10:52:53 +0200
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6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
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1 /*
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2 * Copyright (c) 2011 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
6ec4af642ba8 Project uses Gradle for build - actual changes
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5 * it under the terms of the GNU General Public License as published by
6ec4af642ba8 Project uses Gradle for build - actual changes
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6 * the Free Software Foundation; version 2 of the License.
6ec4af642ba8 Project uses Gradle for build - actual changes
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7 *
6ec4af642ba8 Project uses Gradle for build - actual changes
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8 * This program is distributed in the hope that it will be useful,
6ec4af642ba8 Project uses Gradle for build - actual changes
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
6ec4af642ba8 Project uses Gradle for build - actual changes
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
6ec4af642ba8 Project uses Gradle for build - actual changes
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11 * GNU General Public License for more details.
6ec4af642ba8 Project uses Gradle for build - actual changes
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12 *
6ec4af642ba8 Project uses Gradle for build - actual changes
Alexander Kitaev <kitaev@gmail.com>
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13 * For information on how to redistribute this software under
6ec4af642ba8 Project uses Gradle for build - actual changes
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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.HashMap;
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20
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21 /**
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22 * Instance pooling.
6ec4af642ba8 Project uses Gradle for build - actual changes
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23 *
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Alexander Kitaev <kitaev@gmail.com>
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24 * @author Artem Tikhomirov
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25 * @author TMate Software Ltd.
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26 */
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27 public class Pool<T> {
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28 private final HashMap<T,T> unify = new HashMap<T, T>();
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29
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30 public T unify(T t) {
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31 T rv = unify.get(t);
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32 if (rv == null) {
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33 // first time we see a new value
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34 unify.put(t, t);
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35 rv = t;
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Alexander Kitaev <kitaev@gmail.com>
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36 }
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Alexander Kitaev <kitaev@gmail.com>
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37 return rv;
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Alexander Kitaev <kitaev@gmail.com>
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38 }
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39
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40 @Override
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41 public String toString() {
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42 StringBuilder sb = new StringBuilder();
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43 sb.append(Pool.class.getSimpleName());
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44 sb.append('<');
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45 if (!unify.isEmpty()) {
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46 sb.append(unify.keySet().iterator().next().getClass().getName());
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47 }
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48 sb.append('>');
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49 sb.append(':');
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50 sb.append(unify.size());
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51 return sb.toString();
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52 }
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53 }