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Default provider for JSR 374:Java API for Processing JSON
/*
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*
* Copyright (c) 2013-2017 Oracle and/or its affiliates. All rights reserved.
*
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* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
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package org.glassfish.json;
import javax.json.JsonNumber;
import java.math.BigDecimal;
import java.math.BigInteger;
/**
* JsonNumber impl. Subclasses provide optimized implementations
* when backed by int, long, BigDecimal
*
* @author Jitendra Kotamraju
*/
abstract class JsonNumberImpl implements JsonNumber {
static JsonNumber getJsonNumber(int num) {
return new JsonIntNumber(num);
}
static JsonNumber getJsonNumber(long num) {
return new JsonLongNumber(num);
}
static JsonNumber getJsonNumber(BigInteger value) {
return new JsonBigDecimalNumber(new BigDecimal(value));
}
static JsonNumber getJsonNumber(double value) {
//bigDecimal = new BigDecimal(value);
// This is the preferred way to convert double to BigDecimal
return new JsonBigDecimalNumber(BigDecimal.valueOf(value));
}
static JsonNumber getJsonNumber(BigDecimal value) {
return new JsonBigDecimalNumber(value);
}
// Optimized JsonNumber impl for int numbers.
private static final class JsonIntNumber extends JsonNumberImpl {
private final int num;
private BigDecimal bigDecimal; // assigning it lazily on demand
JsonIntNumber(int num) {
this.num = num;
}
@Override
public boolean isIntegral() {
return true;
}
@Override
public int intValue() {
return num;
}
@Override
public int intValueExact() {
return num;
}
@Override
public long longValue() {
return num;
}
@Override
public long longValueExact() {
return num;
}
@Override
public double doubleValue() {
return num;
}
@Override
public BigDecimal bigDecimalValue() {
// reference assignments are atomic. At the most some more temp
// BigDecimal objects are created
BigDecimal bd = bigDecimal;
if (bd == null) {
bigDecimal = bd = new BigDecimal(num);
}
return bd;
}
@Override
public Number numberValue() {
return num;
}
@Override
public String toString() {
return Integer.toString(num);
}
}
// Optimized JsonNumber impl for long numbers.
private static final class JsonLongNumber extends JsonNumberImpl {
private final long num;
private BigDecimal bigDecimal; // assigning it lazily on demand
JsonLongNumber(long num) {
this.num = num;
}
@Override
public boolean isIntegral() {
return true;
}
@Override
public int intValue() {
return (int) num;
}
@Override
public int intValueExact() {
return Math.toIntExact(num);
}
@Override
public long longValue() {
return num;
}
@Override
public long longValueExact() {
return num;
}
@Override
public double doubleValue() {
return num;
}
@Override
public BigDecimal bigDecimalValue() {
// reference assignments are atomic. At the most some more temp
// BigDecimal objects are created
BigDecimal bd = bigDecimal;
if (bd == null) {
bigDecimal = bd = new BigDecimal(num);
}
return bd;
}
@Override
public Number numberValue() {
return num;
}
@Override
public String toString() {
return Long.toString(num);
}
}
// JsonNumber impl using BigDecimal numbers.
private static final class JsonBigDecimalNumber extends JsonNumberImpl {
private final BigDecimal bigDecimal;
JsonBigDecimalNumber(BigDecimal value) {
this.bigDecimal = value;
}
@Override
public BigDecimal bigDecimalValue() {
return bigDecimal;
}
@Override
public Number numberValue() {
return bigDecimalValue();
}
}
@Override
public boolean isIntegral() {
return bigDecimalValue().scale() == 0;
}
@Override
public int intValue() {
return bigDecimalValue().intValue();
}
@Override
public int intValueExact() {
return bigDecimalValue().intValueExact();
}
@Override
public long longValue() {
return bigDecimalValue().longValue();
}
@Override
public long longValueExact() {
return bigDecimalValue().longValueExact();
}
@Override
public double doubleValue() {
return bigDecimalValue().doubleValue();
}
@Override
public BigInteger bigIntegerValue() {
return bigDecimalValue().toBigInteger();
}
@Override
public BigInteger bigIntegerValueExact() {
return bigDecimalValue().toBigIntegerExact();
}
@Override
public ValueType getValueType() {
return ValueType.NUMBER;
}
@Override
public int hashCode() {
return bigDecimalValue().hashCode();
}
@Override
public boolean equals(Object obj) {
if (this == obj){
return true;
}
if (!(obj instanceof JsonNumber)) {
return false;
}
JsonNumber other = (JsonNumber)obj;
return bigDecimalValue().equals(other.bigDecimalValue());
}
@Override
public String toString() {
return bigDecimalValue().toString();
}
}
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