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package com.fasterxml.jackson.databind.ser.std;
import java.io.IOException;
import java.util.Calendar;
import java.util.Date;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.*;
public class StdKeySerializers
{
protected final static JsonSerializer<Object> DEFAULT_KEY_SERIALIZER = new StdKeySerializer();
@SuppressWarnings("unchecked")
protected final static JsonSerializer<Object> DEFAULT_STRING_SERIALIZER
= (JsonSerializer<Object>)(JsonSerializer<?>) new StringKeySerializer();
private StdKeySerializers() { }
/**
* @param config Serialization configuration in use, may be needed in choosing
* serializer to use
* @param rawKeyType Type of key values to serialize
* @param useDefault If no match is found, should we return fallback deserializer
* (true), or null (false)?
*/
@SuppressWarnings("unchecked")
public static JsonSerializer<Object> getStdKeySerializer(SerializationConfig config,
Class<?> rawKeyType, boolean useDefault)
{
if (rawKeyType != null) {
if (rawKeyType == String.class) {
return DEFAULT_STRING_SERIALIZER;
}
if (rawKeyType == Object.class || rawKeyType.isPrimitive()
|| Number.class.isAssignableFrom(rawKeyType)) {
return DEFAULT_KEY_SERIALIZER;
}
if (Date.class.isAssignableFrom(rawKeyType)) {
return (JsonSerializer<Object>) DateKeySerializer.instance;
}
if (Calendar.class.isAssignableFrom(rawKeyType)) {
return (JsonSerializer<Object>) CalendarKeySerializer.instance;
}
}
return useDefault ? DEFAULT_KEY_SERIALIZER : null;
}
/**
* @deprecated Since 2.5
*/
@Deprecated
public static JsonSerializer<Object> getStdKeySerializer(JavaType keyType) {
return getStdKeySerializer(null, keyType.getRawClass(), true);
}
public static JsonSerializer<Object> getDefault() {
return DEFAULT_KEY_SERIALIZER;
}
/*
/**********************************************************
/* Standard implementations
/**********************************************************
*/
public static class StringKeySerializer extends StdSerializer<String>
{
public StringKeySerializer() { super(String.class); }
@Override
public void serialize(String value, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonGenerationException {
jgen.writeFieldName(value);
}
}
public static class DateKeySerializer extends StdSerializer<Date> {
protected final static JsonSerializer<?> instance = new DateKeySerializer();
public DateKeySerializer() { super(Date.class); }
@Override
public void serialize(Date value, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonGenerationException {
provider.defaultSerializeDateKey(value, jgen);
}
}
public static class CalendarKeySerializer extends StdSerializer<Calendar> {
protected final static JsonSerializer<?> instance = new CalendarKeySerializer();
public CalendarKeySerializer() { super(Calendar.class); }
@Override
public void serialize(Calendar value, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonGenerationException {
provider.defaultSerializeDateKey(value.getTimeInMillis(), jgen);
}
}
}
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