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| 1 | +/* | |
| 2 | + * Copyright (c) 1998, 2002, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package java.beans.beancontext; | |
| 27 | + | |
| 28 | +/** | |
| 29 | + * <p> | |
| 30 | + * This interface is implemented by a JavaBean that does | |
| 31 | + * not directly have a BeanContext(Child) associated with | |
| 32 | + * it (via implementing that interface or a subinterface thereof), | |
| 33 | + * but has a public BeanContext(Child) delegated from it. | |
| 34 | + * For example, a subclass of java.awt.Container may have a BeanContext | |
| 35 | + * associated with it that all Component children of that Container shall | |
| 36 | + * be contained within. | |
| 37 | + * </p> | |
| 38 | + * <p> | |
| 39 | + * An Object may not implement this interface and the | |
| 40 | + * BeanContextChild interface | |
| 41 | + * (or any subinterfaces thereof) they are mutually exclusive. | |
| 42 | + * </p> | |
| 43 | + * <p> | |
| 44 | + * Callers of this interface shall examine the return type in order to | |
| 45 | + * obtain a particular subinterface of BeanContextChild as follows: | |
| 46 | + * <code> | |
| 47 | + * BeanContextChild bcc = o.getBeanContextProxy(); | |
| 48 | + * | |
| 49 | + * if (bcc instanceof BeanContext) { | |
| 50 | + * // ... | |
| 51 | + * } | |
| 52 | + * </code> | |
| 53 | + * or | |
| 54 | + * <code> | |
| 55 | + * BeanContextChild bcc = o.getBeanContextProxy(); | |
| 56 | + * BeanContext bc = null; | |
| 57 | + * | |
| 58 | + * try { | |
| 59 | + * bc = (BeanContext)bcc; | |
| 60 | + * } catch (ClassCastException cce) { | |
| 61 | + * // cast failed, bcc is not an instanceof BeanContext | |
| 62 | + * } | |
| 63 | + * </code> | |
| 64 | + * </p> | |
| 65 | + * <p> | |
| 66 | + * The return value is a constant for the lifetime of the implementing | |
| 67 | + * instance | |
| 68 | + * </p> | |
| 69 | + * @author Laurence P. G. Cable | |
| 70 | + * @since 1.2 | |
| 71 | + * | |
| 72 | + * @see java.beans.beancontext.BeanContextChild | |
| 73 | + * @see java.beans.beancontext.BeanContextChildSupport | |
| 74 | + */ | |
| 75 | + | |
| 76 | +public interface BeanContextProxy { | |
| 77 | + | |
| 78 | + /** | |
| 79 | + * Gets the <code>BeanContextChild</code> (or subinterface) | |
| 80 | + * associated with this object. | |
| 81 | + * @return the <code>BeanContextChild</code> (or subinterface) | |
| 82 | + * associated with this object | |
| 83 | + */ | |
| 84 | + BeanContextChild getBeanContextProxy(); | |
| 85 | +} | |