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/DoubleNode.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 64-bit ("double precision")
     * floating point values simple 32-bit integer values.
     */
    @SuppressWarnings("serial")
    public class DoubleNode
        extends NumericNode
    {
        protected final double _value;
    
        /* 
        /**********************************************************
        /* Construction
        /**********************************************************
         */
    
        public DoubleNode(double v) { _value = v; }
    
        public static DoubleNode valueOf(double v) { return new DoubleNode(v); }
    
        /* 
        /**********************************************************
        /* BaseJsonNode extended API
        /**********************************************************
         */
    
        @Override public JsonToken asToken() { return JsonToken.VALUE_NUMBER_FLOAT; }
    
        @Override
        public JsonParser.NumberType numberType() { return JsonParser.NumberType.DOUBLE; }
    
        /* 
        /**********************************************************
        /* Overrridden JsonNode methods
        /**********************************************************
         */
    
        @Override
        public boolean isFloatingPointNumber() { return true; }
    
        @Override
        public boolean isDouble() { return true; }
    
        @Override public boolean canConvertToInt() {
            return (_value >= Integer.MIN_VALUE && _value <= Integer.MAX_VALUE);
        }
        @Override public boolean canConvertToLong() {
            return (_value >= Long.MIN_VALUE && _value <= Long.MAX_VALUE);
        }
    
        @Override // since 2.12
        public boolean canConvertToExactIntegral() {
            return !Double.isNaN(_value) && !Double.isInfinite(_value)
                    && (_value == Math.rint(_value));
        }
    
        @Override
        public Number numberValue() {
            return Double.valueOf(_value);
        }
    
        @Override
        public short shortValue() { return (short) _value; }
    
        @Override
        public int intValue() { return (int) _value; }
    
        @Override
        public long longValue() { return (long) _value; }
    
        @Override
        public float floatValue() { return (float) _value; }
    
        @Override
        public double doubleValue() { return _value; }
    
        @Override
        public BigDecimal decimalValue() { return BigDecimal.valueOf(_value); }
    
        @Override
        public BigInteger bigIntegerValue() {
            return decimalValue().toBigInteger();
        }
    
        @Override
        public String asText() {
            return NumberOutput.toString(_value);
        }
    
        // @since 2.9
        @Override
        public boolean isNaN() {
            return Double.isNaN(_value) || Double.isInfinite(_value);
        }
    
        @Override
        public final void serialize(JsonGenerator g, SerializerProvider provider) throws IOException {
            g.writeNumber(_value);
        }
    
        @Override
        public boolean equals(Object o)
        {
            if (o == this) return true;
            if (o == null) return false;
            if (o instanceof DoubleNode) {
                // We must account for NaNs: NaN does not equal NaN, therefore we have
                // to use Double.compare().
                final double otherValue = ((DoubleNode) o)._value;
                return Double.compare(_value, otherValue) == 0;
            }
            return false;
        }
    
        @Override
        public int hashCode()
        {
            // same as hashCode Double.class uses
            long l = Double.doubleToLongBits(_value);
            return ((int) l) ^ (int) (l >> 32);
    
        }
    }
    

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

     

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    2022-03-29, 31697👍, 0💬