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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 class is intended to handle <string> element. | ||
| 29 | * This element specifies {@link String} values. | ||
| 30 | * The result value is created from text of the body of this element. | ||
| 31 | * For example:<pre> | ||
| 32 | * <string>description</string></pre> | ||
| 33 | * is equivalent to {@code "description"} in Java code. | ||
| 34 | * The value of inner element is calculated | ||
| 35 | * before adding to the string using {@link String#valueOf(Object)}. | ||
| 36 | * Note that all characters are used including whitespaces (' ', '\t', '\n', '\r'). | ||
| 37 | * So the value of the element<pre> | ||
| 38 | * <string><true></string></pre> | ||
| 39 | * is not equal to the value of the element<pre> | ||
| 40 | * <string> | ||
| 41 | * <true> | ||
| 42 | * </string></pre> | ||
| 43 | * <p>The following atribute is supported: | ||
| 44 | * <dl> | ||
| 45 | * <dt>id | ||
| 46 | * <dd>the identifier of the variable that is intended to store the result | ||
| 47 | * </dl> | ||
| 48 | * | ||
| 49 | * @since 1.7 | ||
| 50 | * | ||
| 51 | * @author Sergey A. Malenkov | ||
| 52 | */ | ||
| 53 | public class StringElementHandler extends ElementHandler { | ||
| 54 | private StringBuilder sb = new StringBuilder(); | ||
| 55 | private ValueObject value = ValueObjectImpl.NULL; | ||
| 56 | |||
| 57 | /** | ||
| 58 | * Adds the character that contained in this element. | ||
| 59 | * | ||
| 60 | * @param ch the character | ||
| 61 | */ | ||
| 62 | @Override | ||
| 63 | public final void addCharacter(char ch) { | ||
| 64 | if (this.sb == null) { | ||
| 65 | throw new IllegalStateException("Could not add chararcter to evaluated string element"); | ||
| 66 | } | ||
| 67 | this.sb.append(ch); | ||
| 68 | } | ||
| 69 | |||
| 70 | /** | ||
| 71 | * Adds the string value of the argument to the string value of this element. | ||
| 72 | * | ||
| 73 | * @param argument the value of the element that contained in this one | ||
| 74 | */ | ||
| 75 | @Override | ||
| 76 | protected final void addArgument(Object argument) { | ||
| 77 | if (this.sb == null) { | ||
| 78 | throw new IllegalStateException("Could not add argument to evaluated string element"); | ||
| 79 | } | ||
| 80 | this.sb.append(argument); | ||
| 81 | } | ||
| 82 | |||
| 83 | /** | ||
| 84 | * Returns the value of this element. | ||
| 85 | * | ||
| 86 | * @return the value of this element | ||
| 87 | */ | ||
| 88 | @Override | ||
| 89 | protected final ValueObject getValueObject() { | ||
| 90 | if (this.sb != null) { | ||
| 91 | try { | ||
| 92 | this.value = ValueObjectImpl.create(getValue(this.sb.toString())); | ||
| 93 | } | ||
| 94 | catch (RuntimeException exception) { | ||
| 95 | getOwner().handleException(exception); | ||
| 96 | } | ||
| 97 | finally { | ||
| 98 | this.sb = null; | ||
| 99 | } | ||
| 100 | } | ||
| 101 | return this.value; | ||
| 102 | } | ||
| 103 | |||
| 104 | /** | ||
| 105 | * Returns the text of the body of this element. | ||
| 106 | * This method evaluates value from text of the body, | ||
| 107 | * and should be overridden in those handlers | ||
| 108 | * that extend behavior of this element. | ||
| 109 | * | ||
| 110 | * @param argument the text of the body | ||
| 111 | * @return evaluated value | ||
| 112 | */ | ||
| 113 | protected Object getValue(String argument) { | ||
| 114 | return argument; | ||
| 115 | } | ||
| 116 | } | ||