/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.juneau.xml.annotation;

/**
 * XML format to use when serializing a POJO.
 *
 * <h5 class='section'>See Also:</h5><ul>
 *    <li class='link'><a class="doclink" href="https://juneau.apache.org/docs/topics/XmlBasics">XML Basics</a>

 * </ul>
 */
public enum XmlFormat {

   /**
    * Normal formatting (default).
    *
    * <p>
    * On a bean class, implies {@link #ELEMENTS} meaning bean properties will be serialized as child elements by default.
    *
    * <p>
    * On a bean property, implies {@link #ELEMENT} meaning the bean property will be serialized as a child element.
    */
   DEFAULT,

   /**
    * Render a bean property as an attribute instead of an element.
    *
    * <p>
    * Only applicable for bean properties, not bean classes.
    *
    * <p>
    * Can only be applied to properties (methods/fields) of class types that can be convertible to <c>Strings</c>.
    */
   ATTR,

   /**
    * Render property as attributes instead of an element.
    *
    * <p>
    * On a bean class, implies bean properties will be serialized as attributes instead of child elements by default.
    *
    * <p>
    * On bean properties, implies that the bean property value itself should be serialized as attributes on the bean
    * element.
    * The bean property data type must be of class type <c>Map&lt;Object,Object&gt;</c> where both
    * objects are convertible to <c>Strings</c>.
    */
   ATTRS,

   /**
    * Render property as an element instead of an attribute.
    *
    * <p>
    * Only applicable for bean properties, not bean classes.
    *
    * <p>
    * Used to override the behavior of the {@link #ATTRS} format applied to the bean class.
    */
   ELEMENT,

   /**
    * Render property value directly as the contents of the element.
    *
    * <p>
    * On a bean class, implies that bean properties will be serialized as child elements.
    * Note that this is equivalent to {@link #DEFAULT}.
    *
    * <p>
    * Only applicable for objects of type array/Collection.
    *
    * <p>
    * On a bean property, implies that the bean property value itself should be serialized as child elements of the
    * bean element.
    */
   ELEMENTS,

   /**
    * Same as {@link #ELEMENTS} except primitive types (string/boolean/number/null for example) are not wrapped in elements.
    *
    * <p>
    * Only applicable for bean properties, not bean classes.
    *
    * <p>
    * Only applicable for objects of type array/Collection.
    *
    * <p>
    * Use of this format may cause data type loss during parsing if the types cannot be inferred through reflection.
    */
   MIXED,

   /**
    * Same as {@link XmlFormat#MIXED}, but whitespace in text nodes are not trimmed during parsing.
    *
    * <p>
    * An example use is HTML5 <xt>&lt;pre&gt;</xt> where whitespace should not be discarded.
    */
   MIXED_PWS,

   /**
    * Render property value as the text content of the element.
    *
    * <p>
    * Similar to {@link #MIXED} but value must be a single value, not a collection.
    *
    * <p>
    * Only applicable for bean properties, not bean classes.
    *
    * <p>
    * Use of this format may cause data type loss during parsing if the type cannot be inferred through reflection.
    */
   TEXT,

   /**
    * Same as {@link XmlFormat#TEXT}, but whitespace in text node is not trimmed during parsing.
    */
   TEXT_PWS,

   /**
    * Same as {@link #TEXT} except the content is expected to be fully-formed XML that will get serialized as-is.
    *
    * <p>
    * During parsing, this XML text will be re-serialized and set on the property.
    *
    * <p>
    * Only applicable for bean properties, not bean classes.
    *
    * <p>
    * Use of this format may cause data type loss during parsing if the type cannot be inferred through reflection.
    */
   XMLTEXT,

   /**
    * Prevents collections and arrays from being enclosed in <xt>&lt;array&gt;</xt> elements.
    *
    * <p>
    * Can only be applied to properties (methods/fields) of type collection or array, or collection classes.
    */
   COLLAPSED,

   /**
    * Identifies a void element.
    *
    * <p>
    * Only applicable for bean classes.
    *
    * <p>
    * Identifies an element that never contains content.
    *
    * <p>
    * The main difference in behavior is how non-void empty elements are handled in the HTML serializer.
    * Void elements are serialized as collapsed nodes (e.g. <js>"&lt;br/&gt;"</js>) whereas non-void empty elements are
    * serialized with an end tag (e.g. "&lt;p&gt;&lt;/p&gt;").
    */
   VOID;

   /**
    * Returns <jk>true</jk> if this format is one of those specified.
    *
    * @param formats The formats to match against.
    * @return <jk>true</jk> if this format is one of those specified.
    */
   public boolean isOneOf(XmlFormat...formats) {
      for (XmlFormat format : formats)
         if (format == this)
            return true;
      return false;
   }
}