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/node/NodeSerialization.java

package com.fasterxml.jackson.databind.node;

import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;

/**
 * Helper value class only used during JDK serialization: contains JSON as `byte[]`
 *
 * @since 2.10
 */
class NodeSerialization implements java.io.Serializable,
    java.io.Externalizable
{
    private static final long serialVersionUID = 1L;

    public byte[] json;

    public NodeSerialization() { }

    public NodeSerialization(byte[] b) { json = b; }

    protected Object readResolve() {
        try {
            return InternalNodeMapper.bytesToNode(json);
        } catch (IOException e) {
            throw new IllegalArgumentException("Failed to JDK deserialize `JsonNode` value: "+e.getMessage(), e);
        }
    }    

    public static NodeSerialization from(Object o) {
        try {
            return new NodeSerialization(InternalNodeMapper.valueToBytes(o));
        } catch (IOException e) {
            throw new IllegalArgumentException("Failed to JDK serialize `"+o.getClass().getSimpleName()+"` value: "+e.getMessage(), e);
        }
    }

    @Override
    public void writeExternal(ObjectOutput out) throws IOException {
        out.writeInt(json.length);
        out.write(json);
    }

    @Override
    public void readExternal(ObjectInput in) throws IOException {
        final int len = in.readInt();
        json = new byte[len];
        in.readFully(json, 0, len);
    }
}

⏎ com/fasterxml/jackson/databind/node/NodeSerialization.java

 

⇒ Jackson Dataformat Extensions

⇐ Jackson Data Binding Source Code

⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library