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Java.JSON.mustache Maven / Gradle / Ivy
{{>licenseInfo}}
package {{invokerPackage}};
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonParseException;
import com.google.gson.TypeAdapter;
import com.google.gson.internal.bind.util.ISO8601Utils;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonWriter;
import com.google.gson.JsonElement;
import io.gsonfire.GsonFireBuilder;
import io.gsonfire.TypeSelector;
{{#joda}}
import org.joda.time.DateTime;
import org.joda.time.LocalDate;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.DateTimeFormatterBuilder;
import org.joda.time.format.ISODateTimeFormat;
{{/joda}}
{{#models.0}}
import {{modelPackage}}.*;
{{/models.0}}
import okio.ByteString;
import java.io.IOException;
import java.io.StringReader;
import java.lang.reflect.Type;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.ParsePosition;
import java.time.LocalDate;
import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Date;
import java.util.Locale;
import java.util.Map;
import java.util.HashMap;
public class JSON {
private Gson gson;
private boolean isLenientOnJson = false;
private DateTypeAdapter dateTypeAdapter = new DateTypeAdapter();
private SqlDateTypeAdapter sqlDateTypeAdapter = new SqlDateTypeAdapter();
{{#joda}}
private DateTimeTypeAdapter dateTimeTypeAdapter = new DateTimeTypeAdapter();
private LocalDateTypeAdapter localDateTypeAdapter = new LocalDateTypeAdapter();
{{/joda}}
{{#jsr310}}
private OffsetDateTimeTypeAdapter offsetDateTimeTypeAdapter = new OffsetDateTimeTypeAdapter();
private LocalDateTypeAdapter localDateTypeAdapter = new LocalDateTypeAdapter();
{{/jsr310}}
private ByteArrayAdapter byteArrayAdapter = new ByteArrayAdapter();
@SuppressWarnings("unchecked")
public static GsonBuilder createGson() {
GsonFireBuilder fireBuilder = new GsonFireBuilder()
{{#models}}
{{#model}}
{{#discriminator}}
.registerTypeSelector({{classname}}.class, new TypeSelector<{{classname}}>() {
@Override
public Class getClassForElement(JsonElement readElement) {
Map classByDiscriminatorValue = new HashMap();
{{#mappedModels}}
classByDiscriminatorValue.put("{{mappingName}}"{{^discriminatorCaseSensitive}}.toUpperCase(Locale.ROOT){{/discriminatorCaseSensitive}}, {{modelName}}.class);
{{/mappedModels}}
classByDiscriminatorValue.put("{{name}}"{{^discriminatorCaseSensitive}}.toUpperCase(Locale.ROOT){{/discriminatorCaseSensitive}}, {{classname}}.class);
return getClassByDiscriminator(classByDiscriminatorValue,
getDiscriminatorValue(readElement, "{{{propertyBaseName}}}"));
}
})
{{/discriminator}}
{{/model}}
{{/models}}
;
GsonBuilder builder = fireBuilder.createGsonBuilder();
{{#disableHtmlEscaping}}
builder.disableHtmlEscaping();
{{/disableHtmlEscaping}}
return builder;
}
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();
}
/**
* Returns the Java class that implements the OpenAPI schema for the specified discriminator value.
*
* @param classByDiscriminatorValue The map of discriminator values to Java classes.
* @param discriminatorValue The value of the OpenAPI discriminator in the input data.
* @return The Java class that implements the OpenAPI schema
*/
private static Class getClassByDiscriminator(Map classByDiscriminatorValue, String discriminatorValue) {
Class clazz = (Class) classByDiscriminatorValue.get(discriminatorValue{{^discriminatorCaseSensitive}}.toUpperCase(Locale.ROOT){{/discriminatorCaseSensitive}});
if (null == clazz) {
throw new IllegalArgumentException("cannot determine model class of name: <" + discriminatorValue + ">");
}
return clazz;
}
public JSON() {
gson = createGson()
.registerTypeAdapter(Date.class, dateTypeAdapter)
.registerTypeAdapter(java.sql.Date.class, sqlDateTypeAdapter)
{{#joda}}
.registerTypeAdapter(DateTime.class, dateTimeTypeAdapter)
.registerTypeAdapter(LocalDate.class, localDateTypeAdapter)
{{/joda}}
{{#jsr310}}
.registerTypeAdapter(OffsetDateTime.class, offsetDateTimeTypeAdapter)
.registerTypeAdapter(LocalDate.class, localDateTypeAdapter)
{{/jsr310}}
.registerTypeAdapter(byte[].class, byteArrayAdapter)
.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;
}
/**
* Configure the parser to be liberal in what it accepts.
*
* @param lenientOnJson Set it to true to ignore some syntax errors
* @return JSON
* @see https://www.javadoc.io/doc/com.google.code.gson/gson/2.8.5/com/google/gson/stream/JsonReader.html
*/
public JSON setLenientOnJson(boolean lenientOnJson) {
isLenientOnJson = lenientOnJson;
return this;
}
/**
* Serialize the given Java object into JSON string.
*
* @param obj Object
* @return String representation of the JSON
*/
public String serialize(Object obj) {
return gson.toJson(obj);
}
/**
* Deserialize the given JSON string to Java object.
*
* @param Type
* @param body The JSON string
* @param returnType The type to deserialize into
* @return The deserialized Java object
*/
@SuppressWarnings("unchecked")
public T deserialize(String body, Type returnType) {
try {
if (isLenientOnJson) {
JsonReader jsonReader = new JsonReader(new StringReader(body));
// see https://www.javadoc.io/doc/com.google.code.gson/gson/2.8.5/com/google/gson/stream/JsonReader.html
jsonReader.setLenient(true);
return gson.fromJson(jsonReader, returnType);
} else {
return gson.fromJson(body, returnType);
}
} catch (JsonParseException e) {
// Fallback processing when failed to parse JSON form response body:
// return the response body string directly for the String return type;
if (returnType.equals(String.class)) {
return (T) body;
} else {
throw (e);
}
}
}
/**
* Gson TypeAdapter for Byte Array type
*/
public class ByteArrayAdapter extends TypeAdapter {
@Override
public void write(JsonWriter out, byte[] value) throws IOException {
if (value == null) {
out.nullValue();
} else {
out.value(ByteString.of(value).base64());
}
}
@Override
public byte[] read(JsonReader in) throws IOException {
switch (in.peek()) {
case NULL:
in.nextNull();
return null;
default:
String bytesAsBase64 = in.nextString();
ByteString byteString = ByteString.decodeBase64(bytesAsBase64);
return byteString.toByteArray();
}
}
}
{{#joda}}
/**
* Gson TypeAdapter for Joda DateTime type
*/
public static class DateTimeTypeAdapter extends TypeAdapter {
private DateTimeFormatter formatter;
public DateTimeTypeAdapter() {
this(new DateTimeFormatterBuilder()
.append(ISODateTimeFormat.dateTime().getPrinter(), ISODateTimeFormat.dateOptionalTimeParser().getParser())
.toFormatter());
}
public DateTimeTypeAdapter(DateTimeFormatter formatter) {
this.formatter = formatter;
}
public void setFormat(DateTimeFormatter dateFormat) {
this.formatter = dateFormat;
}
@Override
public void write(JsonWriter out, DateTime date) throws IOException {
if (date == null) {
out.nullValue();
} else {
out.value(formatter.print(date));
}
}
@Override
public DateTime read(JsonReader in) throws IOException {
switch (in.peek()) {
case NULL:
in.nextNull();
return null;
default:
String date = in.nextString();
return formatter.parseDateTime(date);
}
}
}
/**
* Gson TypeAdapter for Joda LocalDate type
*/
public class LocalDateTypeAdapter extends TypeAdapter {
private DateTimeFormatter formatter;
public LocalDateTypeAdapter() {
this(ISODateTimeFormat.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.print(date));
}
}
@Override
public LocalDate read(JsonReader in) throws IOException {
switch (in.peek()) {
case NULL:
in.nextNull();
return null;
default:
String date = in.nextString();
return formatter.parseLocalDate(date);
}
}
}
public JSON setDateTimeFormat(DateTimeFormatter dateFormat) {
dateTimeTypeAdapter.setFormat(dateFormat);
return this;
}
public JSON setLocalDateFormat(DateTimeFormatter dateFormat) {
localDateTypeAdapter.setFormat(dateFormat);
return this;
}
{{/joda}}
{{#jsr310}}
/**
* 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;
}
{{/jsr310}}
/**
* Gson TypeAdapter for java.sql.Date type
* If the dateFormat is null, a simple "yyyy-MM-dd" format will be used
* (more efficient than SimpleDateFormat).
*/
public static class SqlDateTypeAdapter extends TypeAdapter {
private DateFormat dateFormat;
public SqlDateTypeAdapter() {}
public SqlDateTypeAdapter(DateFormat dateFormat) {
this.dateFormat = dateFormat;
}
public void setFormat(DateFormat dateFormat) {
this.dateFormat = dateFormat;
}
@Override
public void write(JsonWriter out, java.sql.Date date) throws IOException {
if (date == null) {
out.nullValue();
} else {
String value;
if (dateFormat != null) {
value = dateFormat.format(date);
} else {
value = date.toString();
}
out.value(value);
}
}
@Override
public java.sql.Date read(JsonReader in) throws IOException {
switch (in.peek()) {
case NULL:
in.nextNull();
return null;
default:
String date = in.nextString();
try {
if (dateFormat != null) {
return new java.sql.Date(dateFormat.parse(date).getTime());
}
return new java.sql.Date(ISO8601Utils.parse(date, new ParsePosition(0)).getTime());
} catch (ParseException e) {
throw new JsonParseException(e);
}
}
}
}
/**
* Gson TypeAdapter for java.util.Date type
* If the dateFormat is null, ISO8601Utils will be used.
*/
public static class DateTypeAdapter extends TypeAdapter {
private DateFormat dateFormat;
public DateTypeAdapter() {}
public DateTypeAdapter(DateFormat dateFormat) {
this.dateFormat = dateFormat;
}
public void setFormat(DateFormat dateFormat) {
this.dateFormat = dateFormat;
}
@Override
public void write(JsonWriter out, Date date) throws IOException {
if (date == null) {
out.nullValue();
} else {
String value;
if (dateFormat != null) {
value = dateFormat.format(date);
} else {
value = ISO8601Utils.format(date, true);
}
out.value(value);
}
}
@Override
public Date read(JsonReader in) throws IOException {
try {
switch (in.peek()) {
case NULL:
in.nextNull();
return null;
default:
String date = in.nextString();
try {
if (dateFormat != null) {
return dateFormat.parse(date);
}
return ISO8601Utils.parse(date, new ParsePosition(0));
} catch (ParseException e) {
throw new JsonParseException(e);
}
}
} catch (IllegalArgumentException e) {
throw new JsonParseException(e);
}
}
}
public JSON setDateFormat(DateFormat dateFormat) {
dateTypeAdapter.setFormat(dateFormat);
return this;
}
public JSON setSqlDateFormat(DateFormat dateFormat) {
sqlDateTypeAdapter.setFormat(dateFormat);
return this;
}
}
