Jackson Data Binding Source Code

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

  • Jackson Data Binding module allows you to converts JSON to and from POJO (Plain Old Java Object) using property accessor or using annotations.
  • Jackson Databind Source Code files are provided in the source packge (jackson-databind-2.12.4-sources.jar). You can download it at Jackson Maven Website.

    You can also browse Jackson Databind Source Code below:

    ✍: FYIcenter.com

    com/fasterxml/jackson/databind/node/BinaryNode.java

    package com.fasterxml.jackson.databind.node;
    
    import java.io.IOException;
    import java.util.Arrays;
    
    import com.fasterxml.jackson.core.*;
    import com.fasterxml.jackson.databind.SerializerProvider;
    
    
    /**
     * Value node that contains Base64 encoded binary value, which will be
     * output and stored as Json String value.
     */
    public class BinaryNode
        extends ValueNode
    {
        private static final long serialVersionUID = 2L;
    
        final static BinaryNode EMPTY_BINARY_NODE = new BinaryNode(new byte[0]);
    
        protected final byte[] _data;
    
        public BinaryNode(byte[] data)
        {
            _data = data;
        }
    
        public BinaryNode(byte[] data, int offset, int length)
        {
            if (offset == 0 && length == data.length) {
                _data = data;
            } else {
                _data = new byte[length];
                System.arraycopy(data, offset, _data, 0, length);
            }
        }
    
        public static BinaryNode valueOf(byte[] data)
        {
            if (data == null) {
                return null;
            }
            if (data.length == 0) {
                return EMPTY_BINARY_NODE;
            }
            return new BinaryNode(data);
        }
    
        public static BinaryNode valueOf(byte[] data, int offset, int length)
        {
            if (data == null) {
                return null;
            }
            if (length == 0) {
                return EMPTY_BINARY_NODE;
            }
            return new BinaryNode(data, offset, length);
        }
    
        @Override
        public JsonNodeType getNodeType()
        {
            return JsonNodeType.BINARY;
        }
    
        @Override
        public JsonToken asToken() {
            /* No distinct type; could use one for textual values,
             * but given that it's not in text form at this point,
             * embedded-object is closest
             */
            return JsonToken.VALUE_EMBEDDED_OBJECT;
        }
    
        /**
         *<p>
         * Note: caller is not to modify returned array in any way, since
         * it is not a copy but reference to the underlying byte array.
         */
        @Override
        public byte[] binaryValue() { return _data; }
    
        /**
         * Hmmh. This is not quite as efficient as using {@link #serialize},
         * but will work correctly.
         */
        @Override
        public String asText() {
            return Base64Variants.getDefaultVariant().encode(_data, false);
        }
    
        @Override
        public final void serialize(JsonGenerator jg, SerializerProvider provider)
            throws IOException, JsonProcessingException
        {
            jg.writeBinary(provider.getConfig().getBase64Variant(),
                    _data, 0, _data.length);
        }
    
        @Override
        public boolean equals(Object o)
        {
            if (o == this) return true;
            if (o == null) return false;
            if (!(o instanceof BinaryNode)) {
                return false;
            }
            return Arrays.equals(((BinaryNode) o)._data, _data);
        }
    
        @Override
        public int hashCode() {
            return (_data == null) ? -1 : _data.length;
        }
    }
    

    com/fasterxml/jackson/databind/node/BinaryNode.java

     

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    2022-03-29, 32112👍, 0💬