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mParticle SDK for server-side Java environments
package com.mparticle;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonElement;
import com.google.gson.TypeAdapter;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonWriter;
import io.gsonfire.GsonFireBuilder;
import org.threeten.bp.LocalDate;
import org.threeten.bp.OffsetDateTime;
import org.threeten.bp.format.DateTimeFormatter;
import java.io.IOException;
import java.util.Locale;
import java.util.Map;
class JSON {
private Gson gson;
private OffsetDateTimeTypeAdapter offsetDateTimeTypeAdapter = new OffsetDateTimeTypeAdapter();
private LocalDateTypeAdapter localDateTypeAdapter = new LocalDateTypeAdapter();
public static GsonBuilder createGson() {
GsonFireBuilder fireBuilder = new GsonFireBuilder()
;
return fireBuilder.createGsonBuilder();
}
private static String getDiscriminatorValue(JsonElement readElement, String discriminatorField) {
JsonElement element = readElement.getAsJsonObject().get(discriminatorField);
if(null == element) {
throw new IllegalArgumentException("missing discriminator field: <" + discriminatorField + ">");
}
return element.getAsString();
}
private static Class getClassByDiscriminator(Map classByDiscriminatorValue, String discriminatorValue) {
Class clazz = (Class) classByDiscriminatorValue.get(discriminatorValue.toUpperCase(Locale.ROOT));
if(null == clazz) {
throw new IllegalArgumentException("cannot determine model class of name: <" + discriminatorValue + ">");
}
return clazz;
}
public JSON() {
gson = createGson()
.registerTypeAdapter(OffsetDateTime.class, offsetDateTimeTypeAdapter)
.registerTypeAdapter(LocalDate.class, localDateTypeAdapter)
.create();
}
/**
* Get Gson.
*
* @return Gson
*/
public Gson getGson() {
return gson;
}
/**
* Set Gson.
*
* @param gson Gson
* @return JSON
*/
public JSON setGson(Gson gson) {
this.gson = gson;
return this;
}
/**
* Gson TypeAdapter for JSR310 OffsetDateTime type
*/
public static class OffsetDateTimeTypeAdapter extends TypeAdapter {
private DateTimeFormatter formatter;
public OffsetDateTimeTypeAdapter() {
this(DateTimeFormatter.ISO_OFFSET_DATE_TIME);
}
public OffsetDateTimeTypeAdapter(DateTimeFormatter formatter) {
this.formatter = formatter;
}
public void setFormat(DateTimeFormatter dateFormat) {
this.formatter = dateFormat;
}
@Override
public void write(JsonWriter out, OffsetDateTime date) throws IOException {
if (date == null) {
out.nullValue();
} else {
out.value(formatter.format(date));
}
}
@Override
public OffsetDateTime read(JsonReader in) throws IOException {
switch (in.peek()) {
case NULL:
in.nextNull();
return null;
default:
String date = in.nextString();
if (date.endsWith("+0000")) {
date = date.substring(0, date.length()-5) + "Z";
}
return OffsetDateTime.parse(date, formatter);
}
}
}
/**
* Gson TypeAdapter for JSR310 LocalDate type
*/
public class LocalDateTypeAdapter extends TypeAdapter {
private DateTimeFormatter formatter;
public LocalDateTypeAdapter() {
this(DateTimeFormatter.ISO_LOCAL_DATE);
}
public LocalDateTypeAdapter(DateTimeFormatter formatter) {
this.formatter = formatter;
}
public void setFormat(DateTimeFormatter dateFormat) {
this.formatter = dateFormat;
}
@Override
public void write(JsonWriter out, LocalDate date) throws IOException {
if (date == null) {
out.nullValue();
} else {
out.value(formatter.format(date));
}
}
@Override
public LocalDate read(JsonReader in) throws IOException {
switch (in.peek()) {
case NULL:
in.nextNull();
return null;
default:
String date = in.nextString();
return LocalDate.parse(date, formatter);
}
}
}
public JSON setOffsetDateTimeFormat(DateTimeFormatter dateFormat) {
offsetDateTimeTypeAdapter.setFormat(dateFormat);
return this;
}
public JSON setLocalDateFormat(DateTimeFormatter dateFormat) {
localDateTypeAdapter.setFormat(dateFormat);
return this;
}
}