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https://github.com/Alfresco/alfresco-community-repo.git
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43e93f3c14
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@18926 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
111 lines
4.0 KiB
Java
111 lines
4.0 KiB
Java
/*
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* Copyright (C) 2005-2010 Alfresco Software Limited.
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*
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* This file is part of Alfresco
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*
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* Alfresco is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Alfresco is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.alfresco.repo.transaction;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.TreeSet;
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/**
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* Helper class that will look up or create transactional resources.
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* This shortcuts some of the "<i>if not existing, then create</i>" code.
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*
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* @author Derek Hulley
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* @since 3.2
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*/
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public abstract class TransactionalResourceHelper
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{
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/**
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* Support method to retrieve or create and bind a <tt>HashMap</tt> to the current transaction.
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*
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* @param <K> the map key type
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* @param <V> the map value type
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* @param resourceKey the key under which the resource will be stored
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* @return Returns an previously-bound <tt>Map</tt> or else a newly-bound <tt>HashMap</tt>
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*/
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public static final <K,V> Map<K,V> getMap(Object resourceKey)
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{
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Map<K,V> map = AlfrescoTransactionSupport.<Map<K,V>>getResource(resourceKey);
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if (map == null)
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{
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map = new HashMap<K, V>(29);
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AlfrescoTransactionSupport.bindResource(resourceKey, map);
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}
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return map;
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}
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/**
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* Support method to retrieve or create and bind a <tt>HashSet</tt> to the current transaction.
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*
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* @param <V> the set value type
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* @param resourceKey the key under which the resource will be stored
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* @return Returns an previously-bound <tt>Set</tt> or else a newly-bound <tt>HashSet</tt>
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*/
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public static final <V> Set<V> getSet(Object resourceKey)
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{
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Set<V> set = AlfrescoTransactionSupport.<Set<V>>getResource(resourceKey);
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if (set == null)
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{
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set = new HashSet<V>(29);
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AlfrescoTransactionSupport.bindResource(resourceKey, set);
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}
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return set;
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}
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/**
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* Support method to retrieve or create and bind a <tt>TreeSet</tt> to the current transaction.
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*
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* @param <V> the set value type
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* @param resourceKey the key under which the resource will be stored
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* @return Returns an previously-bound <tt>TreeSet</tt> or else a newly-bound <tt>TreeSet</tt>
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*/
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public static final <V> TreeSet<V> getTreeSet(Object resourceKey)
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{
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TreeSet<V> set = AlfrescoTransactionSupport.<TreeSet<V>>getResource(resourceKey);
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if (set == null)
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{
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set = new TreeSet<V>();
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AlfrescoTransactionSupport.bindResource(resourceKey, set);
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}
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return set;
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}
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/**
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* Support method to retrieve or create and bind a <tt>ArrayList</tt> to the current transaction.
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*
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* @param <V> the list value type
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* @param resourceKey the key under which the resource will be stored
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* @return Returns an previously-bound <tt>List</tt> or else a newly-bound <tt>ArrayList</tt>
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*/
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public static final <V> List<V> getList(Object resourceKey)
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{
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List<V> list = AlfrescoTransactionSupport.<List<V>>getResource(resourceKey);
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if (list == null)
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{
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list = new ArrayList<V>(29);
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AlfrescoTransactionSupport.bindResource(resourceKey, list);
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}
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return list;
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}
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}
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