001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
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004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  You may obtain a copy of the License at                                                              *
006// *                                                                                                                         *
007// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
008// *                                                                                                                         *
009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an  *
010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.xml.annotation;
014
015/**
016 * XML format to use when serializing a POJO.
017 *
018 * <h5 class='section'>See Also:</h5><ul>
019 *    <li class='link'><a class="doclink" href="../../../../../index.html#jm.XmlDetails">XML Details</a>
020
021 * </ul>
022 */
023public enum XmlFormat {
024
025   /**
026    * Normal formatting (default).
027    *
028    * <p>
029    * On a bean class, implies {@link #ELEMENTS} meaning bean properties will be serialized as child elements by default.
030    *
031    * <p>
032    * On a bean property, implies {@link #ELEMENT} meaning the bean property will be serialized as a child element.
033    */
034   DEFAULT,
035
036   /**
037    * Render a bean property as an attribute instead of an element.
038    *
039    * <p>
040    * Only applicable for bean properties, not bean classes.
041    *
042    * <p>
043    * Can only be applied to properties (methods/fields) of class types that can be convertible to <c>Strings</c>.
044    */
045   ATTR,
046
047   /**
048    * Render property as attributes instead of an element.
049    *
050    * <p>
051    * On a bean class, implies bean properties will be serialized as attributes instead of child elements by default.
052    *
053    * <p>
054    * On bean properties, implies that the bean property value itself should be serialized as attributes on the bean
055    * element.
056    * The bean property data type must be of class type <c>Map&lt;Object,Object&gt;</c> where both
057    * objects are convertible to <c>Strings</c>.
058    */
059   ATTRS,
060
061   /**
062    * Render property as an element instead of an attribute.
063    *
064    * <p>
065    * Only applicable for bean properties, not bean classes.
066    *
067    * <p>
068    * Used to override the behavior of the {@link #ATTRS} format applied to the bean class.
069    */
070   ELEMENT,
071
072   /**
073    * Render property value directly as the contents of the element.
074    *
075    * <p>
076    * On a bean class, implies that bean properties will be serialized as child elements.
077    * Note that this is equivalent to {@link #DEFAULT}.
078    *
079    * <p>
080    * Only applicable for objects of type array/Collection.
081    *
082    * <p>
083    * On a bean property, implies that the bean property value itself should be serialized as child elements of the
084    * bean element.
085    */
086   ELEMENTS,
087
088   /**
089    * Same as {@link #ELEMENTS} except primitive types (string/boolean/number/null for example) are not wrapped in elements.
090    *
091    * <p>
092    * Only applicable for bean properties, not bean classes.
093    *
094    * <p>
095    * Only applicable for objects of type array/Collection.
096    *
097    * <p>
098    * Use of this format may cause data type loss during parsing if the types cannot be inferred through reflection.
099    */
100   MIXED,
101
102   /**
103    * Same as {@link XmlFormat#MIXED}, but whitespace in text nodes are not trimmed during parsing.
104    *
105    * <p>
106    * An example use is HTML5 <xt>&lt;pre&gt;</xt> where whitespace should not be discarded.
107    */
108   MIXED_PWS,
109
110   /**
111    * Render property value as the text content of the element.
112    *
113    * <p>
114    * Similar to {@link #MIXED} but value must be a single value, not a collection.
115    *
116    * <p>
117    * Only applicable for bean properties, not bean classes.
118    *
119    * <p>
120    * Use of this format may cause data type loss during parsing if the type cannot be inferred through reflection.
121    */
122   TEXT,
123
124   /**
125    * Same as {@link XmlFormat#TEXT}, but whitespace in text node is not trimmed during parsing.
126    */
127   TEXT_PWS,
128
129   /**
130    * Same as {@link #TEXT} except the content is expected to be fully-formed XML that will get serialized as-is.
131    *
132    * <p>
133    * During parsing, this XML text will be re-serialized and set on the property.
134    *
135    * <p>
136    * Only applicable for bean properties, not bean classes.
137    *
138    * <p>
139    * Use of this format may cause data type loss during parsing if the type cannot be inferred through reflection.
140    */
141   XMLTEXT,
142
143   /**
144    * Prevents collections and arrays from being enclosed in <xt>&lt;array&gt;</xt> elements.
145    *
146    * <p>
147    * Can only be applied to properties (methods/fields) of type collection or array, or collection classes.
148    */
149   COLLAPSED,
150
151   /**
152    * Identifies a void element.
153    *
154    * <p>
155    * Only applicable for bean classes.
156    *
157    * <p>
158    * Identifies an element that never contains content.
159    *
160    * <p>
161    * The main difference in behavior is how non-void empty elements are handled in the HTML serializer.
162    * Void elements are serialized as collapsed nodes (e.g. <js>"&lt;br/&gt;"</js>) whereas non-void empty elements are
163    * serialized with an end tag (e.g. "&lt;p&gt;&lt;/p&gt;").
164    */
165   VOID;
166
167   /**
168    * Returns <jk>true</jk> if this format is one of those specified.
169    *
170    * @param formats The formats to match against.
171    * @return <jk>true</jk> if this format is one of those specified.
172    */
173   public boolean isOneOf(XmlFormat...formats) {
174      for (XmlFormat format : formats)
175         if (format == this)
176            return true;
177      return false;
178   }
179}