Mercurial > hg > release > thermostat-0.5
view storage/core/src/main/java/com/redhat/thermostat/storage/core/Category.java @ 904:6e38be537e2a
Register data-class with categories.
Reviewed-by: vanaltj
http://icedtea.classpath.org/pipermail/thermostat/2013-January/005069.html
author | Roman Kennke <rkennke@redhat.com> |
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date | Thu, 10 Jan 2013 21:47:29 +0100 |
parents | 4ccae2248ed5 |
children | ccac9bcabaa0 |
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/* * Copyright 2012 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.storage.core; import java.util.Collection; import java.util.Collections; import java.util.HashMap; import java.util.Map; import java.util.Objects; import com.redhat.thermostat.storage.model.Pojo; /** * A bag of data */ public class Category<T extends Pojo> { private String name; private final Map<String, Key<?>> keys; private transient Class<T> dataClass; private String dataClassName; public Category() { this(null, null); } /** * Creates a new Category instance with the specified name. * * @param name the name of the category * * @throws IllegalArgumentException if a Category is created with a name that has been used before */ public Category(String name, Class<T> dataClass, Key<?>... keys) { Map<String, Key<?>> keysMap = new HashMap<String, Key<?>>(); for (Key<?> key : keys) { keysMap.put(key.getName(), key); } this.keys = Collections.unmodifiableMap(keysMap); setName(name); setDataClass(dataClass); } public String getName() { return name; } private void setName(String name) { if (Categories.contains(name)) { throw new IllegalStateException(); } this.name = name; if (name != null) { Categories.add(this); } } private void setDataClass(Class<T> dataClass) { this.dataClass = dataClass; if (dataClass != null) { dataClassName = dataClass.getName(); } } public Class<T> getDataClass() { if (dataClass == null && dataClassName != null) { initializeDataClassFromName(); } return dataClass; } @SuppressWarnings("unchecked") private void initializeDataClassFromName() { try { dataClass = (Class<T>) Class.forName(dataClassName); } catch (ClassNotFoundException e) { throw new StorageException(e); } } public synchronized Collection<Key<?>> getKeys() { return keys.values(); } public Key<?> getKey(String name) { return keys.get(name); } @Override public String toString() { return getName() + keys; } public int hashCode() { return Objects.hash(name, keys); } public boolean equals(Object o) { if (! (o instanceof Category)) { return false; } Category<?> other = (Category<?>) o; return Objects.equals(name, other.name) && Objects.equals(keys, other.keys); } }