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com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeSerializer Maven / Gradle / Ivy
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General data-binding functionality for Jackson: works on core streaming API
package com.fasterxml.jackson.databind.jsontype.impl;
import java.io.IOException;
import com.fasterxml.jackson.annotation.JsonTypeInfo.As;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.BeanProperty;
import com.fasterxml.jackson.databind.jsontype.TypeIdResolver;
/**
* Type serializer that will embed type information in an array,
* as the first element, and actual value as the second element.
*/
public class AsArrayTypeSerializer extends TypeSerializerBase
{
public AsArrayTypeSerializer(TypeIdResolver idRes, BeanProperty property) {
super(idRes, property);
}
@Override
public AsArrayTypeSerializer forProperty(BeanProperty prop) {
return (_property == prop) ? this : new AsArrayTypeSerializer(this._idResolver, prop);
}
@Override
public As getTypeInclusion() { return As.WRAPPER_ARRAY; }
/*
/**********************************************************
/* Writing prefixes
/**********************************************************
*/
@Override
public void writeTypePrefixForObject(Object value, JsonGenerator jgen) throws IOException {
final String typeId = idFromValue(value);
// NOTE: can not always avoid writing type id, even if null
if (jgen.canWriteTypeId()) {
if (typeId != null) {
jgen.writeTypeId(typeId);
}
} else {
jgen.writeStartArray();
jgen.writeString(typeId);
}
jgen.writeStartObject();
}
@Override
public void writeTypePrefixForObject(Object value, JsonGenerator jgen, Class type) throws IOException {
final String typeId = idFromValueAndType(value, type);
// NOTE: can not always avoid writing type id, even if null
if (jgen.canWriteTypeId()) {
if (typeId != null) {
jgen.writeTypeId(typeId);
}
} else {
jgen.writeStartArray();
jgen.writeString(typeId);
}
jgen.writeStartObject();
}
@Override
public void writeTypePrefixForArray(Object value, JsonGenerator jgen) throws IOException {
final String typeId = idFromValue(value);
if (jgen.canWriteTypeId()) {
if (typeId != null) {
jgen.writeTypeId(typeId);
}
} else {
jgen.writeStartArray();
jgen.writeString(typeId);
}
jgen.writeStartArray();
}
@Override
public void writeTypePrefixForArray(Object value, JsonGenerator jgen, Class type) throws IOException {
final String typeId = idFromValueAndType(value, type);
if (jgen.canWriteTypeId()) {
if (typeId != null) {
jgen.writeTypeId(typeId);
}
} else {
jgen.writeStartArray();
jgen.writeString(typeId);
}
jgen.writeStartArray();
}
@Override
public void writeTypePrefixForScalar(Object value, JsonGenerator jgen) throws IOException {
final String typeId = idFromValue(value);
if (jgen.canWriteTypeId()) {
if (typeId != null) {
jgen.writeTypeId(typeId);
}
} else {
// only need the wrapper array
jgen.writeStartArray();
jgen.writeString(typeId);
}
}
@Override
public void writeTypePrefixForScalar(Object value, JsonGenerator jgen, Class type) throws IOException {
final String typeId = idFromValueAndType(value, type);
if (jgen.canWriteTypeId()) {
if (typeId != null) {
jgen.writeTypeId(typeId);
}
} else {
// only need the wrapper array
jgen.writeStartArray();
jgen.writeString(typeId);
}
}
/*
/**********************************************************
/* Writing suffixes
/**********************************************************
*/
@Override
public void writeTypeSuffixForObject(Object value, JsonGenerator jgen) throws IOException {
jgen.writeEndObject();
if (!jgen.canWriteTypeId()) {
jgen.writeEndArray();
}
}
@Override
public void writeTypeSuffixForArray(Object value, JsonGenerator jgen) throws IOException {
// first array caller needs to close, then wrapper array
jgen.writeEndArray();
if (!jgen.canWriteTypeId()) {
jgen.writeEndArray();
}
}
@Override
public void writeTypeSuffixForScalar(Object value, JsonGenerator jgen) throws IOException {
if (!jgen.canWriteTypeId()) {
// just the wrapper array to close
jgen.writeEndArray();
}
}
/*
/**********************************************************
/* Writing with custom type id
/**********************************************************
*/
@Override
public void writeCustomTypePrefixForObject(Object value, JsonGenerator jgen, String typeId) throws IOException {
if (jgen.canWriteTypeId()) {
if (typeId != null) {
jgen.writeTypeId(typeId);
}
} else {
jgen.writeStartArray();
jgen.writeString(typeId);
}
jgen.writeStartObject();
}
@Override
public void writeCustomTypePrefixForArray(Object value, JsonGenerator jgen, String typeId) throws IOException {
if (jgen.canWriteTypeId()) {
if (typeId != null) {
jgen.writeTypeId(typeId);
}
} else {
jgen.writeStartArray();
jgen.writeString(typeId);
}
jgen.writeStartArray();
}
@Override
public void writeCustomTypePrefixForScalar(Object value, JsonGenerator jgen, String typeId) throws IOException {
if (jgen.canWriteTypeId()) {
if (typeId != null) {
jgen.writeTypeId(typeId);
}
} else {
jgen.writeStartArray();
jgen.writeString(typeId);
}
}
@Override
public void writeCustomTypeSuffixForObject(Object value, JsonGenerator jgen, String typeId) throws IOException {
if (!jgen.canWriteTypeId()) {
writeTypeSuffixForObject(value, jgen); // standard impl works fine
}
}
@Override
public void writeCustomTypeSuffixForArray(Object value, JsonGenerator jgen, String typeId) throws IOException {
if (!jgen.canWriteTypeId()) {
writeTypeSuffixForArray(value, jgen); // standard impl works fine
}
}
@Override
public void writeCustomTypeSuffixForScalar(Object value, JsonGenerator jgen, String typeId) throws IOException {
if (!jgen.canWriteTypeId()) {
writeTypeSuffixForScalar(value, jgen); // standard impl works fine
}
}
}