org.dominokit.jackson.ser.BaseNumberJsonSerializer Maven / Gradle / Ivy
/*
* Copyright 2013 Nicolas Morel
*
* 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.dominokit.jackson.ser;
import java.math.BigDecimal;
import java.math.BigInteger;
import org.dominokit.jackson.JsonSerializationContext;
import org.dominokit.jackson.JsonSerializer;
import org.dominokit.jackson.JsonSerializerParameters;
import org.dominokit.jackson.stream.JsonWriter;
/**
* Base implementation of {@link org.dominokit.jackson.JsonSerializer} for {@link java.lang.Number}.
*/
public abstract class BaseNumberJsonSerializer extends JsonSerializer {
/** Default implementation of {@link BaseNumberJsonSerializer} for {@link BigDecimal} */
public static final class BigDecimalJsonSerializer extends BaseNumberJsonSerializer {
private static final BigDecimalJsonSerializer INSTANCE = new BigDecimalJsonSerializer();
/** @return an instance of {@link BigDecimalJsonSerializer} */
public static BigDecimalJsonSerializer getInstance() {
return INSTANCE;
}
private BigDecimalJsonSerializer() {}
/** {@inheritDoc} */
@Override
protected boolean isDefault(BigDecimal value) {
return null == value || BigDecimal.ZERO.compareTo(value) == 0;
}
}
/** Default implementation of {@link BaseNumberJsonSerializer} for {@link BigInteger} */
public static final class BigIntegerJsonSerializer extends BaseNumberJsonSerializer {
private static final BigIntegerJsonSerializer INSTANCE = new BigIntegerJsonSerializer();
/** @return an instance of {@link BigIntegerJsonSerializer} */
public static BigIntegerJsonSerializer getInstance() {
return INSTANCE;
}
private BigIntegerJsonSerializer() {}
/** {@inheritDoc} */
@Override
protected boolean isDefault(BigInteger value) {
return null == value || BigInteger.ZERO.compareTo(value) == 0;
}
}
/** Default implementation of {@link BaseNumberJsonSerializer} for {@link Byte} */
public static final class ByteJsonSerializer extends BaseNumberJsonSerializer {
private static final ByteJsonSerializer INSTANCE = new ByteJsonSerializer();
/** @return an instance of {@link ByteJsonSerializer} */
public static ByteJsonSerializer getInstance() {
return INSTANCE;
}
private static byte defaultValue;
private ByteJsonSerializer() {}
/** {@inheritDoc} */
@Override
protected boolean isDefault(Byte value) {
return null == value || defaultValue == value;
}
}
/** Default implementation of {@link BaseNumberJsonSerializer} for {@link Double} */
public static final class DoubleJsonSerializer extends BaseNumberJsonSerializer {
private static final DoubleJsonSerializer INSTANCE = new DoubleJsonSerializer();
/** @return an instance of {@link DoubleJsonSerializer} */
public static DoubleJsonSerializer getInstance() {
return INSTANCE;
}
private DoubleJsonSerializer() {}
/** {@inheritDoc} */
@Override
protected boolean isDefault(Double value) {
return null == value || value == 0d;
}
/** {@inheritDoc} */
@Override
public void doSerialize(
JsonWriter writer,
Double value,
JsonSerializationContext ctx,
JsonSerializerParameters params) {
// writer has a special method to write double, let's use instead of default Number method.
writer.value(value.doubleValue());
}
}
/** Default implementation of {@link BaseNumberJsonSerializer} for {@link Float} */
public static final class FloatJsonSerializer extends BaseNumberJsonSerializer {
private static final FloatJsonSerializer INSTANCE = new FloatJsonSerializer();
/** @return an instance of {@link FloatJsonSerializer} */
public static FloatJsonSerializer getInstance() {
return INSTANCE;
}
private FloatJsonSerializer() {}
/** {@inheritDoc} */
@Override
protected boolean isDefault(Float value) {
return null == value || value == 0f;
}
}
/** Default implementation of {@link BaseNumberJsonSerializer} for {@link Integer} */
public static final class IntegerJsonSerializer extends BaseNumberJsonSerializer {
private static final IntegerJsonSerializer INSTANCE = new IntegerJsonSerializer();
/** @return an instance of {@link IntegerJsonSerializer} */
public static IntegerJsonSerializer getInstance() {
return INSTANCE;
}
private IntegerJsonSerializer() {}
/** {@inheritDoc} */
@Override
protected boolean isDefault(Integer value) {
return null == value || value == 0;
}
}
/** Default implementation of {@link BaseNumberJsonSerializer} for {@link Long} */
public static final class LongJsonSerializer extends BaseNumberJsonSerializer {
private static final LongJsonSerializer INSTANCE = new LongJsonSerializer();
/** @return an instance of {@link LongJsonSerializer} */
public static LongJsonSerializer getInstance() {
return INSTANCE;
}
private LongJsonSerializer() {}
/** {@inheritDoc} */
@Override
protected boolean isDefault(Long value) {
return null == value || value == 0l;
}
/** {@inheritDoc} */
@Override
public void doSerialize(
JsonWriter writer,
Long value,
JsonSerializationContext ctx,
JsonSerializerParameters params) {
// writer has a special method to write long, let's use instead of default Number method.
writer.value(value.longValue());
}
}
/** Default implementation of {@link BaseNumberJsonSerializer} for {@link Short} */
public static final class ShortJsonSerializer extends BaseNumberJsonSerializer {
private static final ShortJsonSerializer INSTANCE = new ShortJsonSerializer();
/** @return an instance of {@link ShortJsonSerializer} */
public static ShortJsonSerializer getInstance() {
return INSTANCE;
}
private static short defaultValue;
private ShortJsonSerializer() {}
/** {@inheritDoc} */
@Override
protected boolean isDefault(Short value) {
return null == value || defaultValue == value;
}
}
/** Default implementation of {@link BaseNumberJsonSerializer} for {@link Number} */
public static final class NumberJsonSerializer extends BaseNumberJsonSerializer {
private static final NumberJsonSerializer INSTANCE = new NumberJsonSerializer();
/** @return an instance of {@link NumberJsonSerializer} */
public static NumberJsonSerializer getInstance() {
return INSTANCE;
}
private NumberJsonSerializer() {}
/** {@inheritDoc} */
@Override
protected boolean isDefault(Number value) {
return null == value || value.intValue() == 0;
}
}
/** {@inheritDoc} */
@Override
public void doSerialize(
JsonWriter writer, N value, JsonSerializationContext ctx, JsonSerializerParameters params) {
writer.value(value);
}
}