package org.apache.torque.om;/* * Copyright 2001-2004 The Apache Software Foundation. * * 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. *//** * This empty class  marks an ObjectKey as being capable of being * represented as a single column in a database.   * * @author <a href="mailto:jmcnally@apache.org">John McNally</a> * @author <a href="mailto:drfish@cox.net">J. Russell Smyth</a> * @version $Id: SimpleKey.java,v 1.7 2005/01/31 19:43:56 tfischer Exp $ */public abstract class SimpleKey extends ObjectKey{    /**     * Creates a SimpleKey equivalent to key     * @param key the key value     * @return a SimpleKey     */        public static SimpleKey keyFor(java.math.BigDecimal key)    {        return new NumberKey(key);    }    /**     * Creates a SimpleKey equivalent to key     * @param key the key value     * @return a SimpleKey     */        public static SimpleKey keyFor(int key)    {        return new NumberKey(key);    }    /**     * Creates a SimpleKey equivalent to key     * @param key the key value     * @return a SimpleKey     */        public static SimpleKey keyFor(long key)    {        return new NumberKey(key);    }    /**     * Creates a SimpleKey equivalent to key     * @param key the key value     * @return a SimpleKey     */        public static SimpleKey keyFor(double key)    {        return new NumberKey(key);    }    /**     * Creates a SimpleKey equivalent to key     * @param key the key value     * @return a SimpleKey     */        public static SimpleKey keyFor(Number key)    {        return new NumberKey(key);    }    /**     * Creates a SimpleKey equivalent to key     * @param key the key value     * @return a SimpleKey     */        public static SimpleKey keyFor(NumberKey key)    {        return new NumberKey(key);    }    /**     * Creates a SimpleKey equivalent to key     * @param key the key value     * @return a SimpleKey     */        public static SimpleKey keyFor(String key)    {        return new StringKey(key);    }    /**     * Creates a SimpleKey equivalent to key     * @param key the key value     * @return a SimpleKey     */        public static SimpleKey keyFor(StringKey key)    {        return new StringKey(key);    }    /**     * Creates a SimpleKey equivalent to key     * @param key the key value     * @return a SimpleKey     */        public static SimpleKey keyFor(java.util.Date key)    {        return new DateKey(key);    }    /**     * Creates a SimpleKey equivalent to key     * @param key the key value     * @return a SimpleKey     */        public static SimpleKey keyFor(DateKey key)    {        return new DateKey(key);    }}