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/IntNode.java

    package com.fasterxml.jackson.databind.node;
    
    import java.io.IOException;
    import java.math.BigDecimal;
    import java.math.BigInteger;
    
    import com.fasterxml.jackson.core.*;
    import com.fasterxml.jackson.core.io.NumberOutput;
    import com.fasterxml.jackson.databind.SerializerProvider;
    
    
    /**
     * Numeric node that contains simple 32-bit integer values.
     */
    @SuppressWarnings("serial")
    public class IntNode
        extends NumericNode
    {
        // // // Let's cache small set of common value
    
        final static int MIN_CANONICAL = -1;
        final static int MAX_CANONICAL = 10;
    
        private final static IntNode[] CANONICALS;
        static {
            int count = MAX_CANONICAL - MIN_CANONICAL + 1;
            CANONICALS = new IntNode[count];
            for (int i = 0; i < count; ++i) {
                CANONICALS[i] = new IntNode(MIN_CANONICAL + i);
            }
        }
    
        /**
         * Integer value this node contains
         */
        protected final int _value;
    
        /* 
        ************************************************
        * Construction
        ************************************************
        */
    
        public IntNode(int v) { _value = v; }
    
        public static IntNode valueOf(int i) {
            if (i > MAX_CANONICAL || i < MIN_CANONICAL) return new IntNode(i);
            return CANONICALS[i - MIN_CANONICAL];
        }
    
        /* 
        /**********************************************************
        /* BaseJsonNode extended API
        /**********************************************************
         */
    
        @Override public JsonToken asToken() { return JsonToken.VALUE_NUMBER_INT; }
    
        @Override
        public JsonParser.NumberType numberType() { return JsonParser.NumberType.INT; }
    
        /* 
        /**********************************************************
        /* Overrridden JsonNode methods
        /**********************************************************
         */
    
        @Override
        public boolean isIntegralNumber() { return true; }
    
        @Override
        public boolean isInt() { return true; }
    
        @Override public boolean canConvertToInt() { return true; }
        @Override public boolean canConvertToLong() { return true; }
        
        @Override
        public Number numberValue() {
            return Integer.valueOf(_value);
        }
    
        @Override
        public short shortValue() { return (short) _value; }
    
        @Override
        public int intValue() { return _value; }
    
        @Override
        public long longValue() { return (long) _value; }
    
        @Override
        public float floatValue() { return (float) _value; }
        
        @Override
        public double doubleValue() { return (double) _value; }
    
        
        @Override
        public BigDecimal decimalValue() { return BigDecimal.valueOf(_value); }
    
        @Override
        public BigInteger bigIntegerValue() { return BigInteger.valueOf(_value); }
    
        @Override
        public String asText() {
            return NumberOutput.toString(_value);
        }
    
        @Override
        public boolean asBoolean(boolean defaultValue) {
            return _value != 0;
        }
        
        @Override
        public final void serialize(JsonGenerator jg, SerializerProvider provider)
            throws IOException, JsonProcessingException
        {
            jg.writeNumber(_value);
        }
    
        @Override
        public boolean equals(Object o)
        {
            if (o == this) return true;
            if (o == null) return false;
            if (o instanceof IntNode) {
                return ((IntNode) o)._value == _value;
            }
            return false;
        }
    
        @Override
        public int hashCode() { return _value; }
    }
    

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

     

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    2022-03-29, 31900👍, 0💬