/*
 * 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.serializer.annotation;

import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.*;

import java.lang.annotation.*;
import java.nio.charset.*;

import org.apache.juneau.*;
import org.apache.juneau.annotation.*;
import org.apache.juneau.parser.*;
import org.apache.juneau.serializer.*;

/**
 * Annotation for specifying config properties defined in {@link Serializer}, {@link OutputStreamSerializer}, and {@link WriterSerializer}.
 *
 * <p>
 * Used primarily for specifying bean configuration properties on REST classes and methods.
 *
 * <h5 class='section'>See Also:</h5><ul>
 *    <li class='link'><a class="doclink" href="https://juneau.apache.org/docs/topics/SerializersAndParsers">Serializers and Parsers</a>
 * </ul>
 */
@Target({ TYPE, METHOD })
@Retention(RUNTIME)
@Inherited
@ContextApply({ SerializerConfigAnnotation.SerializerApply.class, SerializerConfigAnnotation.OutputStreamSerializerApply.class, SerializerConfigAnnotation.WriterSerializerApply.class })
public @interface SerializerConfig {

   /**
    * Add <js>"_type"</js> properties when needed.
    *
    * <p>
    * If <js>"true"</js>, then <js>"_type"</js> properties will be added to beans if their type cannot be inferred
    * through reflection.
    *
    * <p>
    * This is used to recreate the correct objects during parsing if the object types cannot be inferred.
    * <br>For example, when serializing a <c>Map&lt;String,Object&gt;</c> field where the bean class cannot be determined from
    * the type of the values.
    *
    * <p>
    * Note the differences between the following settings:
    * <ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#addRootType()} - Affects whether <js>'_type'</js> is added to root node.
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#addBeanTypes()} - Affects whether <js>'_type'</js> is added to any nodes.
    * </ul>
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#addBeanTypes()}
    * </ul>
    *
    * @return The annotation value.
    */
   String addBeanTypes() default "";

   /**
    * Add type attribute to root nodes.
    *
    * <p>
    * When disabled, it is assumed that the parser knows the exact Java POJO type being parsed, and therefore top-level
    * type information that might normally be included to determine the data type will not be serialized.
    *
    * <p>
    * For example, when serializing a top-level POJO with a {@link Bean#typeName() @Bean(typeName)} value, a
    * <js>'_type'</js> attribute will only be added when this setting is enabled.
    *
    * <p>
    * Note the differences between the following settings:
    * <ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#addRootType()} - Affects whether <js>'_type'</js> is added to root node.
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#addBeanTypes()} - Affects whether <js>'_type'</js> is added to any nodes.
    * </ul>
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#addRootType()}
    * </ul>
    *
    * @return The annotation value.
    */
   String addRootType() default "";

   /**
    * Binary output format.
    *
    * <p>
    * When using the {@link OutputStreamSerializer#serializeToString(Object)} method on stream-based serializers, this defines the format to use
    * when converting the resulting byte array to a string.
    *
    * <ul class='values'>
    *    <li><js>"SPACED_HEX"</js>
    *    <li><js>"HEX"</js> (default)
    *    <li><js>"BASE64"</js>
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.OutputStreamSerializer.Builder#binaryFormat(BinaryFormat)}
    * </ul>
    *
    * @return The annotation value.
    */
   String binaryFormat() default "";

   /**
    * Automatically detect POJO recursions.
    *
    * <p>
    * Specifies that recursions should be checked for during traversal.
    *
    * <p>
    * Recursions can occur when traversing models that aren't true trees but rather contain loops.
    * <br>In general, unchecked recursions cause stack-overflow-errors.
    * <br>These show up as {@link ParseException ParseExceptions} with the message <js>"Depth too deep.  Stack overflow occurred."</js>.
    *
    * <p>
    * The behavior when recursions are detected depends on the value for {@link org.apache.juneau.BeanTraverseContext.Builder#ignoreRecursions()}.
    *
    * <p>
    * For example, if a model contains the links A-&gt;B-&gt;C-&gt;A, then the JSON generated will look like
    *    the following when <jsf>BEANTRAVERSE_ignoreRecursions</jsf> is <jk>true</jk>...
    *
    * <p class='bjson'>
    *    {A:{B:{C:<jk>null</jk>}}}
    * </p>
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='warn'>
    *       Checking for recursion can cause a small performance penalty.
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.BeanTraverseContext.Builder#detectRecursions()}
    * </ul>
    *
    * @return The annotation value.
    */
   String detectRecursions() default "";

   /**
    * File charset.
    *
    * <p>
    * The character set to use for writing Files to the file system.
    *
    * <p>
    * Used when passing in files to {@link Serializer#serialize(Object, Object)}.
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Format: string
    *    <li class='note'>
    *       "DEFAULT" can be used to indicate the JVM default file system charset.
    *    <li class='note'>
    *       Default: JVM system default.
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    *    <li class='note'>
    *       This setting does not apply to the RDF serializers.
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.WriterSerializer.Builder#fileCharset(java.nio.charset.Charset)}
    * </ul>
    *
    * @return The annotation value.
    */
   String fileCharset() default "";

   /**
    * Ignore recursion errors.
    *
    * <p>
    * Used in conjunction with {@link org.apache.juneau.BeanTraverseContext.Builder#detectRecursions()}.
    * <br>Setting is ignored if <jsf>BEANTRAVERSE_detectRecursions</jsf> is <js>"false"</js>.
    *
    * <p>
    * If <js>"true"</js>, when we encounter the same object when traversing a tree, we set the value to <jk>null</jk>.
    * <br>Otherwise, a {@link BeanRecursionException} is thrown with the message <js>"Recursion occurred, stack=..."</js>.
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.BeanTraverseContext.Builder#ignoreRecursions()}
    * </ul>
    *
    * @return The annotation value.
    */
   String ignoreRecursions() default "";

   /**
    * Initial depth.
    *
    * <p>
    * The initial indentation level at the root.
    * <br>Useful when constructing document fragments that need to be indented at a certain level.
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Format: integer
    * <li class='note'>
    *       Default value: <js>"0"</js>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.BeanTraverseContext.Builder#initialDepth(int)}
    * </ul>
    *
    * @return The annotation value.
    */
   String initialDepth() default "";

   /**
    * Don't trim null bean property values.
    *
    * <p>
    * If <js>"true"</js>, null bean values will be serialized to the output.
    *
    * <p>
    * Note that not enabling this setting has the following effects on parsing:
    * <ul class='spaced-list'>
    *    <li>
    *       Map entries with <jk>null</jk> values will be lost.
    * </ul>
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#keepNullProperties()}
    * </ul>
    *
    * @return The annotation value.
    */
   String keepNullProperties() default "";

   /**
    * Serializer listener.
    *
    * <p>
    * Class used to listen for errors and warnings that occur during serialization.
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#listener(Class)}
    * </ul>
    *
    * @return The annotation value.
    */
   Class<? extends SerializerListener> listener() default SerializerListener.Void.class;

   /**
    * Max traversal depth.
    *
    * <p>
    * Abort traversal if specified depth is reached in the POJO tree.
    * <br>If this depth is exceeded, an exception is thrown.
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Format: integer
    *    <li class='note'>
    *       Default value: <js>"100"</js>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.BeanTraverseContext.Builder#maxDepth(int)}
    * </ul>
    *
    * @return The annotation value.
    */
   String maxDepth() default "";

   /**
    * Maximum indentation.
    *
    * <p>
    * Specifies the maximum indentation level in the serialized document.
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Format: integer
    *    <li class='note'>
    *       Default: 100
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    *    <li class='note'>
    *       This setting does not apply to the RDF serializers.
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.WriterSerializer.Builder#maxIndent(int)}
    * </ul>
    *
    * @return The annotation value.
    */
   String maxIndent() default "";

   /**
    * Quote character.
    *
    * <p>
    * This is the character used for quoting attributes and values.
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Default: <c>"</c>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    *    <li class='note'>
    *       This setting does not apply to the RDF serializers.
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.WriterSerializer.Builder#quoteChar(char)}
    * </ul>
    *
    * @return The annotation value.
    */
   String quoteChar() default "";

   /**
    * Optional rank for this config.
    *
    * <p>
    * Can be used to override default ordering and application of config annotations.
    *
    * @return The annotation value.
    */
   int rank() default 0;

   /**
    * Sort arrays and collections alphabetically.
    *
    * <p>
    * Copies and sorts the contents of arrays and collections before serializing them.
    *
    * <p>
    * Note that this introduces a performance penalty.
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#sortCollections()}
    * </ul>
    *
    * @return The annotation value.
    */
   String sortCollections() default "";

   /**
    * Sort maps alphabetically.
    *
    * <p>
    * Copies and sorts the contents of maps by their keys before serializing them.
    *
    * <p>
    * Note that this introduces a performance penalty.
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#sortMaps()}
    * </ul>
    *
    * @return The annotation value.
    */
   String sortMaps() default "";

   /**
    * Output stream charset.
    *
    * <p>
    * The character set to use when writing to OutputStreams.
    *
    * <p>
    * Used when passing in output streams and byte arrays to {@link WriterSerializer#serialize(Object, Object)}.
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Format: string
    *    <li class='note'>
    *       Default: <js>"utf-8"</js>.
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    *    <li class='note'>
    *       This setting does not apply to the RDF serializers.
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.WriterSerializer.Builder#streamCharset(Charset)}
    * </ul>
    *
    * @return The annotation value.
    */
   String streamCharset() default "";

   /**
    * Trim empty lists and arrays.
    *
    * <p>
    * If <js>"true"</js>, empty lists and arrays will not be serialized.
    *
    * <p>
    * Note that enabling this setting has the following effects on parsing:
    * <ul class='spaced-list'>
    *    <li>
    *       Map entries with empty list values will be lost.
    *    <li>
    *       Bean properties with empty list values will not be set.
    * </ul>
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#trimEmptyCollections()}
    * </ul>
    *
    * @return The annotation value.
    */
   String trimEmptyCollections() default "";

   /**
    * Trim empty maps.
    *
    * <p>
    * If <js>"true"</js>, empty map values will not be serialized to the output.
    *
    * <p>
    * Note that enabling this setting has the following effects on parsing:
    * <ul class='spaced-list'>
    *    <li>
    *       Bean properties with empty map values will not be set.
    * </ul>
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#trimEmptyMaps()}
    * </ul>
    *
    * @return The annotation value.
    */
   String trimEmptyMaps() default "";

   /**
    * Trim strings.
    *
    * <p>
    * If <js>"true"</js>, string values will be trimmed of whitespace using {@link String#trim()} before being serialized.
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#trimStrings()}
    * </ul>
    *
    * @return The annotation value.
    */
   String trimStrings() default "";

   /**
    * URI context bean.
    *
    * <h5 class='section'>Description:</h5>
    * <p>
    * Bean used for resolution of URIs to absolute or root-relative form.
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Format: JSON object representing a {@link UriContext}
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#uriContext(UriContext)}
    * </ul>
    *
    * @return The annotation value.
    */
   String uriContext() default "";

   /**
    * URI relativity.
    *
    * <p>
    * Defines what relative URIs are relative to when serializing any of the following:
    * <ul>
    *    <li>{@link java.net.URI}
    *    <li>{@link java.net.URL}
    *    <li>Properties and classes annotated with {@link Uri @Uri}
    * </ul>
    *
    * <ul class='values'>
    *    <li><js>"RESOURCE"</js> (default) - Relative URIs should be considered relative to the servlet URI.
    *    <li><js>"PATH_INFO"</js> - Relative URIs should be considered relative to the request URI.
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#uriRelativity(UriRelativity)}
    *    <li class='link'><a class="doclink" href="https://juneau.apache.org/docs/topics/MarshallingUris">URIs</a>
    * </ul>
    *
    * @return The annotation value.
    */
   String uriRelativity() default "";

   /**
    * URI resolution.
    *
    * <p>
    * Defines the resolution level for URIs when serializing any of the following:
    * <ul>
    *    <li>{@link java.net.URI}
    *    <li>{@link java.net.URL}
    *    <li>Properties and classes annotated with {@link Uri @Uri}
    * </ul>
    *
    * <ul class='values'>
    *    <li><js>"ABSOLUTE"</js> - Resolve to an absolute URL (e.g. <js>"http://host:port/context-root/servlet-path/path-info"</js>).
    *    <li><js>"ROOT_RELATIVE"</js> - Resolve to a root-relative URL (e.g. <js>"/context-root/servlet-path/path-info"</js>).
    *    <li><js>"NONE"</js> (default) - Don't do any URL resolution.
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.Serializer.Builder#uriResolution(UriResolution)}
    *    <li class='link'><a class="doclink" href="https://juneau.apache.org/docs/topics/MarshallingUris">URIs</a>
    * </ul>
    *
    * @return The annotation value.
    */
   String uriResolution() default "";

   /**
    * Use whitespace.
    *
    * <p>
    * If <js>"true"</js>, whitespace is added to the output to improve readability.
    *
    * <ul class='values'>
    *    <li><js>"true"</js>
    *    <li><js>"false"</js> (default)
    * </ul>
    *
    * <h5 class='section'>Notes:</h5><ul>
    *    <li class='note'>
    *       Supports <a class="doclink" href="https://juneau.apache.org/docs/topics/DefaultVarResolver">VarResolver.DEFAULT</a> (e.g. <js>"$C{myConfigVar}"</js>).
    * </ul>
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.serializer.WriterSerializer.Builder#useWhitespace()}
    * </ul>
    *
    * @return The annotation value.
    */
   String useWhitespace() default "";
}