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

Jackson Annotations Source Code files are provided in the source packge (jackson-annotations-2.12.4-sources.jar). You can download it at Jackson Maven Website.

You can also browse Jackson Annotations Source Code below:

⏎ com/fasterxml/jackson/databind/jsonFormatVisitors/JsonObjectFormatVisitor.java

package com.fasterxml.jackson.databind.jsonFormatVisitors;

import com.fasterxml.jackson.databind.BeanProperty;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.SerializerProvider;

/**
 * Visitor called when properties of a type that maps to JSON Object
 * are being visited: this usually means POJOs, but sometimes other
 * types use it too (like {@link java.util.EnumMap}).
 */
public interface JsonObjectFormatVisitor extends JsonFormatVisitorWithSerializerProvider
{
    /**
     * Callback method called when a POJO property is being traversed.
     */
    public void property(BeanProperty writer) throws JsonMappingException;

    /**
     * Callback method called when a non-POJO property (typically something
     * like an Enum entry of {@link java.util.EnumMap} type) is being
     * traversed. With POJOs, {@link #property(BeanProperty)} is called instead.
     */
    public void property(String name, JsonFormatVisitable handler, JavaType propertyTypeHint) throws JsonMappingException;

    public void optionalProperty(BeanProperty writer) throws JsonMappingException;
    public void optionalProperty(String name, JsonFormatVisitable handler,
            JavaType propertyTypeHint)
        throws JsonMappingException;

    /**
     * Default "empty" implementation, useful as the base to start on;
     * especially as it is guaranteed to implement all the method
     * of the interface, even if new methods are getting added.
     */
    public static class Base
        implements JsonObjectFormatVisitor
    {
        protected SerializerProvider _provider;

        public Base() { }
        public Base(SerializerProvider p) { _provider = p; }

        @Override
        public SerializerProvider getProvider() { return _provider; }

        @Override
        public void setProvider(SerializerProvider p) { _provider = p; }

        @Override
        public void property(BeanProperty prop) throws JsonMappingException { }

        @Override
        public void property(String name, JsonFormatVisitable handler,
                JavaType propertyTypeHint) throws JsonMappingException { }

        @Override
        public void optionalProperty(BeanProperty prop) throws JsonMappingException { }

        @Override
        public void optionalProperty(String name, JsonFormatVisitable handler,
                JavaType propertyTypeHint) throws JsonMappingException { }
    }
}

⏎ com/fasterxml/jackson/databind/jsonFormatVisitors/JsonObjectFormatVisitor.java

 

⇒ Jackson Dataformat Extensions

⇐ Jackson Data Binding Source Code

⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library