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eFaps is a framework used to map objects with or without attached files to a relational database and optional file systems (only for attaches files). Configurable access control can be provided down to object and attribute level depending on implementation and use case. Depending on requirements, events (like triggers) allow to implement business logic and to separate business logic from user interface. The framework includes integrations (e.g. webdav, full text search) and a web application as 'simple' configurable user interface. Some best practises, example web application modules (e.g. team work module) support administrators and implementers using this framework.

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/**
 * Copyright 2003 - 2012 The eFaps Team
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Revision:        $Rev: 7483 $
 * Last Changed:    $Date: 2012-05-11 11:57:38 -0500 (Fri, 11 May 2012) $
 * Last Changed By: $Author: [email protected] $
 */

package org.efaps.util.cache;

import java.util.UUID;

/**
 * Cache that is initialized automatically on the first access to it.
 *
 * @author The eFaps Team
 * @version $Id: AbstractAutomaticCache.java 7483 2012-05-11 16:57:38Z [email protected] $
 * @param  CacheObjectInterface
 */
public abstract class AbstractAutomaticCache
    extends AbstractCache
{
    /**
     * Returns for given key id the cached object from the cache4Id cache. If
     * the cache is NOT initialized null is returned.
     *
     * @param _id   id of searched cached object
     * @return cached object
     */
    @Override
    public T get(final long _id)
    {
        if (!hasEntries()) {
            initialize(AbstractAutomaticCache.class);
        }
        return getCache4Id().get(new Long(_id));
    }

    /**
     * Returns for given key id the cached object from the cache4Id cache. If
     * the cache is NOT initialized, the cache will be initialized.
     *
     * @param _name     name of searched cached object
     * @return cached object
     */
    @Override
    public T get(final String _name)
    {
        if (!hasEntries()) {
            initialize(AbstractAutomaticCache.class);
        }
        return getCache4Name().get(_name);
    }

    /**
     * Returns for given key id the cached object from the cache4Id cache. If
     * the cache is NOT initialized, the cache will be initialized.
     *
     * @param _uuid     UUID of searched cached object
     * @return cached object
     */
    @Override
    public T get(final UUID _uuid)
    {
        if (!hasEntries()) {
            initialize(AbstractAutomaticCache.class);
        }
        return getCache4UUID().get(_uuid);
    }
}