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

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

You can also browse Jackson Databind 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;

import com.fasterxml.jackson.core.util.ByteArrayBuilder;

/**
 * Helper value class only used during JDK serialization: contains JSON as `byte[]`
 *
 * @since 2.10
 */
class NodeSerialization implements java.io.Serializable,
    java.io.Externalizable
{
    // To avoid malicious input only allocate up to 100k
    protected final static int LONGEST_EAGER_ALLOC = 100_000;

    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 = _read(in, len);
    }

    private byte[] _read(ObjectInput in, int expLen) throws IOException {
        // Common case, just read directly
        if (expLen <= LONGEST_EAGER_ALLOC) {
            byte[] result = new byte[expLen];
            in.readFully(result, 0, expLen);
            return result;
        }
        // but longer content needs more care to avoid DoS by maliciously crafted data
        // (this wrt [databind#3328]
        try (final ByteArrayBuilder bb = new ByteArrayBuilder(LONGEST_EAGER_ALLOC)) {
            byte[] buffer = bb.resetAndGetFirstSegment();
            int outOffset = 0;
            while (true) {
                int toRead = Math.min(buffer.length - outOffset, expLen);
                in.readFully(buffer, 0, toRead);
                expLen -= toRead;
                outOffset += toRead;
                // Did we get everything we needed? If so, we are done
                if (expLen == 0) {
                    return bb.completeAndCoalesce(outOffset);
                }
                // Or perhaps we filled the current segment? If so, finish, get next
                if (outOffset == buffer.length) {
                    buffer = bb.finishCurrentSegment();
                    outOffset = 0;
                }
            }
        }
    }
}

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

Or download all of them as a single archive file:

File name: jackson-databind-2.14.0-sources.jar
File size: 1187952 bytes
Release date: 2022-11-05
Download 

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