com.fasterxml.jackson.databind.ser.std.NumberSerializers Maven / Gradle / Ivy
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package com.fasterxml.jackson.databind.ser.std;
import java.io.IOException;
import java.lang.reflect.Type;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Map;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.annotation.JacksonStdImpl;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatVisitorWrapper;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonIntegerFormatVisitor;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonNumberFormatVisitor;
/**
* Container class for serializers used for handling standard JDK-provided types.
*/
public class NumberSerializers
{
protected NumberSerializers() { }
public static void addAll(Map> allDeserializers)
{
final JsonSerializer intS = new IntegerSerializer();
allDeserializers.put(Integer.class.getName(), intS);
allDeserializers.put(Integer.TYPE.getName(), intS);
allDeserializers.put(Long.class.getName(), LongSerializer.instance);
allDeserializers.put(Long.TYPE.getName(), LongSerializer.instance);
allDeserializers.put(Byte.class.getName(), IntLikeSerializer.instance);
allDeserializers.put(Byte.TYPE.getName(), IntLikeSerializer.instance);
allDeserializers.put(Short.class.getName(), ShortSerializer.instance);
allDeserializers.put(Short.TYPE.getName(), ShortSerializer.instance);
// Numbers, limited length floating point
allDeserializers.put(Float.class.getName(), FloatSerializer.instance);
allDeserializers.put(Float.TYPE.getName(), FloatSerializer.instance);
allDeserializers.put(Double.class.getName(), DoubleSerializer.instance);
allDeserializers.put(Double.TYPE.getName(), DoubleSerializer.instance);
}
/*
/**********************************************************
/* Concrete serializers, numerics
/**********************************************************
*/
@JacksonStdImpl
public final static class ShortSerializer
extends StdScalarSerializer
{
final static ShortSerializer instance = new ShortSerializer();
public ShortSerializer() { super(Short.class); }
@Override
public void serialize(Short value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
jgen.writeNumber(value.shortValue());
}
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
{
return createSchemaNode("number", true); // msteiger: maybe "integer" or "short" ?
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
JsonIntegerFormatVisitor v2 = visitor.expectIntegerFormat(typeHint);
if (v2 != null) {
v2.numberType(JsonParser.NumberType.INT); // should be SHORT
}
}
}
/**
* This is the special serializer for regular {@link java.lang.Integer}s
* (and primitive ints)
*
* Since this is one of "native" types, no type information is ever
* included on serialization (unlike for most scalar types as of 1.5)
*/
@JacksonStdImpl
public final static class IntegerSerializer
extends NonTypedScalarSerializerBase
{
public IntegerSerializer() { super(Integer.class); }
@Override
public void serialize(Integer value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
jgen.writeNumber(value.intValue());
}
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
{
return createSchemaNode("integer", true);
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
JsonIntegerFormatVisitor v2 = visitor.expectIntegerFormat(typeHint);
if (v2 != null) {
v2.numberType(JsonParser.NumberType.INT);
}
}
}
/**
* Similar to {@link IntegerSerializer}, but will not cast to Integer:
* instead, cast is to {@link java.lang.Number}, and conversion is
* by calling {@link java.lang.Number#intValue}.
*/
@JacksonStdImpl
public final static class IntLikeSerializer
extends StdScalarSerializer
{
final static IntLikeSerializer instance = new IntLikeSerializer();
public IntLikeSerializer() { super(Number.class); }
@Override
public void serialize(Number value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
jgen.writeNumber(value.intValue());
}
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
{
return createSchemaNode("integer", true);
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
JsonIntegerFormatVisitor v2 = visitor.expectIntegerFormat(typeHint);
if (v2 != null) {
v2.numberType(JsonParser.NumberType.INT);
}
}
}
@JacksonStdImpl
public final static class LongSerializer
extends StdScalarSerializer
{
final static LongSerializer instance = new LongSerializer();
public LongSerializer() { super(Long.class); }
@Override
public void serialize(Long value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
jgen.writeNumber(value.longValue());
}
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
{
return createSchemaNode("number", true);
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
JsonIntegerFormatVisitor v2 = visitor.expectIntegerFormat(typeHint);
if (v2 != null) {
v2.numberType(JsonParser.NumberType.LONG);
}
}
}
@JacksonStdImpl
public final static class FloatSerializer
extends StdScalarSerializer
{
final static FloatSerializer instance = new FloatSerializer();
public FloatSerializer() { super(Float.class); }
@Override
public void serialize(Float value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
jgen.writeNumber(value.floatValue());
}
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
{
return createSchemaNode("number", true);
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
JsonNumberFormatVisitor v2 = visitor.expectNumberFormat(typeHint);
if (v2 != null) {
v2.numberType(JsonParser.NumberType.FLOAT);
}
}
}
/**
* This is the special serializer for regular {@link java.lang.Double}s
* (and primitive doubles)
*
* Since this is one of "native" types, no type information is ever
* included on serialization (unlike for most scalar types as of 1.5)
*/
@JacksonStdImpl
public final static class DoubleSerializer
extends NonTypedScalarSerializerBase
{
final static DoubleSerializer instance = new DoubleSerializer();
public DoubleSerializer() { super(Double.class); }
@Override
public void serialize(Double value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
jgen.writeNumber(value.doubleValue());
}
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
{
return createSchemaNode("number", true);
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
JsonNumberFormatVisitor v2 = visitor.expectNumberFormat(typeHint);
if (v2 != null) {
v2.numberType(JsonParser.NumberType.DOUBLE);
}
}
}
/**
* As a fallback, we may need to use this serializer for other
* types of {@link Number}s (custom types).
*/
@JacksonStdImpl
public final static class NumberSerializer
extends StdScalarSerializer
{
public final static NumberSerializer instance = new NumberSerializer();
public NumberSerializer() { super(Number.class); }
@Override
public void serialize(Number value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
// As per [JACKSON-423], handling for BigInteger and BigDecimal was missing!
if (value instanceof BigDecimal) {
// 07-Jul-2013, tatu: Should be handled by propagating setting to JsonGenerator
// so this should not be needed:
/*
if (provider.isEnabled(SerializationFeature.WRITE_BIGDECIMAL_AS_PLAIN)) {
// [Issue#232]: Ok, rather clumsy, but let's try to work around the problem with:
if (!(jgen instanceof TokenBuffer)) {
jgen.writeNumber(((BigDecimal) value).toPlainString());
return;
}
}
*/
jgen.writeNumber((BigDecimal) value);
} else if (value instanceof BigInteger) {
jgen.writeNumber((BigInteger) value);
/* These shouldn't match (as there are more specific ones),
* but just to be sure:
*/
} else if (value instanceof Integer) {
jgen.writeNumber(value.intValue());
} else if (value instanceof Long) {
jgen.writeNumber(value.longValue());
} else if (value instanceof Double) {
jgen.writeNumber(value.doubleValue());
} else if (value instanceof Float) {
jgen.writeNumber(value.floatValue());
} else if ((value instanceof Byte) || (value instanceof Short)) {
jgen.writeNumber(value.intValue()); // doesn't need to be cast to smaller numbers
} else {
// We'll have to use fallback "untyped" number write method
jgen.writeNumber(value.toString());
}
}
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
{
return createSchemaNode("number", true);
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
// Hmmh. What should it be? Ideally should probably indicate BIG_DECIMAL
// to ensure no information is lost? But probably won't work that well...
JsonNumberFormatVisitor v2 = visitor.expectNumberFormat(typeHint);
if (v2 != null) {
v2.numberType(JsonParser.NumberType.BIG_DECIMAL);
}
}
}
}