org.dbrain.data.jackson.serializers.JsonBigDecimalSerializer.java Source code

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Here is the source code for org.dbrain.data.jackson.serializers.JsonBigDecimalSerializer.java

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/*
 * Copyright [2015] [Eric Poitras]
 *
 *     Licensed under the Apache License, Version 2.0 (the "License");
 *     you may not use this file except in compliance with the License.
 *     You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 *     Unless required by applicable law or agreed to in writing, software
 *     distributed under the License is distributed on an "AS IS" BASIS,
 *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *     See the License for the specific language governing permissions and
 *     limitations under the License.
 */

package org.dbrain.data.jackson.serializers;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;

/**
 * Serialize BigDecimal with more than 15 significant digits to String literal.
 */
public class JsonBigDecimalSerializer extends JsonSerializer<BigDecimal> {

    private BigInteger MAX_VALUE = new BigInteger("999999999999999");
    private BigInteger MIN_VALUE = new BigInteger("-999999999999999");

    @Override
    public void serialize(BigDecimal value, JsonGenerator jgen, SerializerProvider provider) throws IOException {
        if (value != null) {
            // Does it have more that 15 significant digits ?
            BigInteger unscaled = value.unscaledValue();
            if (unscaled.compareTo(MIN_VALUE) >= 0 && unscaled.compareTo(MAX_VALUE) <= 0) {
                jgen.writeNumber(value);
            } else {
                jgen.writeString(value.toString());
            }
        } else {
            jgen.writeNull();
        }
    }

}