| /* |
| * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package com.sun.beans.decoder; |
| |
| /** |
| * This class is intended to handle <string> element. |
| * This element specifies {@link String} values. |
| * The result value is created from text of the body of this element. |
| * For example:<pre> |
| * <string>description</string></pre> |
| * is equivalent to {@code "description"} in Java code. |
| * The value of inner element is calculated |
| * before adding to the string using {@link String#valueOf(Object)}. |
| * Note that all characters are used including whitespaces (' ', '\t', '\n', '\r'). |
| * So the value of the element<pre> |
| * <string><true></string></pre> |
| * is not equal to the value of the element<pre> |
| * <string> |
| * <true> |
| * </string></pre> |
| * <p>The following atribute is supported: |
| * <dl> |
| * <dt>id |
| * <dd>the identifier of the variable that is intended to store the result |
| * </dl> |
| * |
| * @since 1.7 |
| * |
| * @author Sergey A. Malenkov |
| */ |
| public class StringElementHandler extends ElementHandler { |
| private StringBuilder sb = new StringBuilder(); |
| private ValueObject value = ValueObjectImpl.NULL; |
| |
| /** |
| * Adds the character that contained in this element. |
| * |
| * @param ch the character |
| */ |
| @Override |
| public final void addCharacter(char ch) { |
| if (this.sb == null) { |
| throw new IllegalStateException("Could not add chararcter to evaluated string element"); |
| } |
| this.sb.append(ch); |
| } |
| |
| /** |
| * Adds the string value of the argument to the string value of this element. |
| * |
| * @param argument the value of the element that contained in this one |
| */ |
| @Override |
| protected final void addArgument(Object argument) { |
| if (this.sb == null) { |
| throw new IllegalStateException("Could not add argument to evaluated string element"); |
| } |
| this.sb.append(argument); |
| } |
| |
| /** |
| * Returns the value of this element. |
| * |
| * @return the value of this element |
| */ |
| @Override |
| protected final ValueObject getValueObject() { |
| if (this.sb != null) { |
| try { |
| this.value = ValueObjectImpl.create(getValue(this.sb.toString())); |
| } |
| catch (RuntimeException exception) { |
| getOwner().handleException(exception); |
| } |
| finally { |
| this.sb = null; |
| } |
| } |
| return this.value; |
| } |
| |
| /** |
| * Returns the text of the body of this element. |
| * This method evaluates value from text of the body, |
| * and should be overridden in those handlers |
| * that extend behavior of this element. |
| * |
| * @param argument the text of the body |
| * @return evaluated value |
| */ |
| protected Object getValue(String argument) { |
| return argument; |
| } |
| } |