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| 1 | /* | ||
| 2 | * Copyright (c) 2008, 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 | package com.sun.beans.decoder; | ||
| 26 | |||
| 27 | /** | ||
| 28 | * This is base class that simplifies access to entities (fields or properties). | ||
| 29 | * The {@code name} attribute specifies the name of the accessible entity. | ||
| 30 | * The element defines getter if it contains no argument | ||
| 31 | * or setter if it contains one argument. | ||
| 32 | * | ||
| 33 | * @since 1.7 | ||
| 34 | * | ||
| 35 | * @author Sergey A. Malenkov | ||
| 36 | */ | ||
| 37 | abstract class AccessorElementHandler extends ElementHandler { | ||
| 38 | private String name; | ||
| 39 | private ValueObject value; | ||
| 40 | |||
| 41 | /** | ||
| 42 | * Parses attributes of the element. | ||
| 43 | * The following atributes are supported: | ||
| 44 | * <dl> | ||
| 45 | * <dt>name | ||
| 46 | * <dd>the name of the accessible entity | ||
| 47 | * <dt>id | ||
| 48 | * <dd>the identifier of the variable that is intended to store the result | ||
| 49 | * </dl> | ||
| 50 | * | ||
| 51 | * @param name the attribute name | ||
| 52 | * @param value the attribute value | ||
| 53 | */ | ||
| 54 | @Override | ||
| 55 | public void addAttribute(String name, String value) { | ||
| 56 | if (name.equals("name")) { // NON-NLS: the attribute name | ||
| 57 | this.name = value; | ||
| 58 | } else { | ||
| 59 | super.addAttribute(name, value); | ||
| 60 | } | ||
| 61 | } | ||
| 62 | |||
| 63 | /** | ||
| 64 | * Adds the argument that is used to set the value of this element. | ||
| 65 | * | ||
| 66 | * @param argument the value of the element that contained in this one | ||
| 67 | */ | ||
| 68 | @Override | ||
| 69 | protected final void addArgument(Object argument) { | ||
| 70 | if (this.value != null) { | ||
| 71 | throw new IllegalStateException("Could not add argument to evaluated element"); | ||
| 72 | } | ||
| 73 | setValue(this.name, argument); | ||
| 74 | this.value = ValueObjectImpl.VOID; | ||
| 75 | } | ||
| 76 | |||
| 77 | /** | ||
| 78 | * Returns the value of this element. | ||
| 79 | * | ||
| 80 | * @return the value of this element | ||
| 81 | */ | ||
| 82 | @Override | ||
| 83 | protected final ValueObject getValueObject() { | ||
| 84 | if (this.value == null) { | ||
| 85 | this.value = ValueObjectImpl.create(getValue(this.name)); | ||
| 86 | } | ||
| 87 | return this.value; | ||
| 88 | } | ||
| 89 | |||
| 90 | /** | ||
| 91 | * Returns the value of the entity with specified {@code name}. | ||
| 92 | * | ||
| 93 | * @param name the name of the accessible entity | ||
| 94 | * @return the value of the specified entity | ||
| 95 | */ | ||
| 96 | protected abstract Object getValue(String name); | ||
| 97 | |||
| 98 | /** | ||
| 99 | * Sets the new value for the entity with specified {@code name}. | ||
| 100 | * | ||
| 101 | * @param name the name of the accessible entity | ||
| 102 | * @param value the new value for the specified entity | ||
| 103 | */ | ||
| 104 | protected abstract void setValue(String name, Object value); | ||
| 105 | } | ||