Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java".

Jackson also allows you to parse or generate XML messages with the Jackson Dataformat XML Extension.

Jackson Dataformat XML Source Code files are provided in the source packge (jackson-dataformat-xml-2.14.0-sources.jar). You can download it at Jackson Maven Website.

You can also browse Jackson Dataformat XML Source Code below:

⏎ com/fasterxml/jackson/dataformat/xml/util/TypeUtil.java

package com.fasterxml.jackson.dataformat.xml.util;

import java.util.Collection;

import com.fasterxml.jackson.databind.JavaType;

public class TypeUtil
{
    /**
     * Helper method used for figuring out if given raw type is a collection ("indexed") type;
     * in which case a wrapper element is typically added.
     */
    public static boolean isIndexedType(JavaType type)
    {
        if (type.isContainerType()) {
            Class<?> cls = type.getRawClass();
            // One special case; byte[] will be serialized as base64-encoded String, not real array, so:
            // (actually, ditto for char[]; thought to be a String)
            if (cls == byte[].class || cls == char[].class) {
                return false;
            }
            // Also, should not add wrapping for Maps
            // [dataformat-xml#220]: nor map-like (Scala Map) types
            if (type.isMapLikeType()) {
                return false;
            }
            return true;
        }
        return false;
    }    

    public static boolean isIndexedType(Class<?> cls)
    {
        return (cls.isArray() && cls != byte[].class && cls != char[].class)
                || Collection.class.isAssignableFrom(cls);
    }
}

⏎ com/fasterxml/jackson/dataformat/xml/util/TypeUtil.java

Or download all of them as a single archive file:

File name: jackson-dataformat-xml-2.14.0-sources.jar
File size: 98015 bytes
Release date: 2022-11-05
Download 

⇒ Download Jackson Dataformat Binary Packages

⇐ Jackson Dataformat Extensions

⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library