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

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

You can also browse Jackson Core Source Code below:

⏎ com/fasterxml/jackson/core/io/OutputDecorator.java

package com.fasterxml.jackson.core.io;

import java.io.*;

/**
 * Handler class that can be used to decorate output destinations.
 * Typical use is to use a filter abstraction (filtered output stream,
 * writer) around original output destination, and apply additional
 * processing during write operations.
 */
@SuppressWarnings("serial")
public abstract class OutputDecorator
    implements java.io.Serializable // since 2.1
{
    /**
     * Method called by {@link com.fasterxml.jackson.core.JsonFactory} instance when
     * creating generator for given {@link OutputStream}, when this decorator
     * has been registered.
     * 
     * @param ctxt IO context in use (provides access to declared encoding)
     * @param out Original output destination
     * 
     * @return OutputStream to use; either passed in argument, or something that
     *   calls it
     *
     * @throws IOException if construction of decorated {@link OutputStream} fails
     */
    public abstract OutputStream decorate(IOContext ctxt, OutputStream out) throws IOException;

    /**
     * Method called by {@link com.fasterxml.jackson.core.JsonFactory} instance when
     * creating generator for given {@link Writer}, when this decorator
     * has been registered.
     * 
     * @param ctxt IO context in use (provides access to declared encoding)
     * @param w Original output writer
     * 
     * @return Writer to use; either passed in argument, or something that calls it
     *
     * @throws IOException if construction of decorated {@link Writer} fails
     */
    public abstract Writer decorate(IOContext ctxt, Writer w) throws IOException;
}

⏎ com/fasterxml/jackson/core/io/OutputDecorator.java

Or download all of them as a single archive file:

File name: jackson-core-2.14.0-sources.jar
File size: 497693 bytes
Release date: 2022-11-05
Download 

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⇐ What Is Jackson

⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library