From b8b8a41a2ca25211aa5b27c22696c6c99f687a97 Mon Sep 17 00:00:00 2001 From: Rob Marsal Date: Thu, 2 Oct 2025 15:48:23 +0100 Subject: [PATCH] fix(PLU-185): date time handling for nanosecond precision --- .github/workflows/check.yaml | 3 - templates/libraries/okhttp-gson/JSON.mustache | 561 ++++++++++++++++++ 2 files changed, 561 insertions(+), 3 deletions(-) create mode 100644 templates/libraries/okhttp-gson/JSON.mustache diff --git a/.github/workflows/check.yaml b/.github/workflows/check.yaml index 16437cc0..b6c4cb0a 100644 --- a/.github/workflows/check.yaml +++ b/.github/workflows/check.yaml @@ -109,10 +109,7 @@ jobs: config-file: config.yml template-dir: templates # For the artifact version drop the `v` prefix as it's not usually used in Maven versions - # Use java.time.Instance for DateTime mappings because our API returns nanosecond precision timestamps command-args: > - --import-mappings=DateTime=java.time.Instant - --type-mappings=DateTime=java.time.Instant --additional-properties=artifactVersion=${{ steps.version_check.outputs.openapi_version_maven }} - name: Check for changes diff --git a/templates/libraries/okhttp-gson/JSON.mustache b/templates/libraries/okhttp-gson/JSON.mustache new file mode 100644 index 00000000..eeb26cb9 --- /dev/null +++ b/templates/libraries/okhttp-gson/JSON.mustache @@ -0,0 +1,561 @@ +{{>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}} + +import okio.ByteString; + +import java.io.IOException; +import java.io.InputStream; +import java.io.InputStreamReader; +import java.io.StringReader; +import java.lang.reflect.Type; +import java.nio.charset.StandardCharsets; +import java.text.DateFormat; +import java.text.ParseException; +import java.text.ParsePosition; +{{#jsr310}} +import java.time.LocalDate; +import java.time.OffsetDateTime; +import java.time.format.DateTimeFormatter; +{{/jsr310}} +import java.util.Date; +import java.util.Locale; +import java.util.Map; +import java.util.HashMap; + +/* + * A JSON utility class + * + * NOTE: in the future, this class may be converted to static, which may break + * backward-compatibility + */ +public class JSON { + private static Gson gson; + private static boolean isLenientOnJson = false; + private static DateTypeAdapter dateTypeAdapter = new DateTypeAdapter(); + private static SqlDateTypeAdapter sqlDateTypeAdapter = new SqlDateTypeAdapter(); + {{#joda}} + private static DateTimeTypeAdapter dateTimeTypeAdapter = new DateTimeTypeAdapter(); + private static LocalDateTypeAdapter localDateTypeAdapter = new LocalDateTypeAdapter(); + {{/joda}} + {{#jsr310}} + private static OffsetDateTimeTypeAdapter offsetDateTimeTypeAdapter = new OffsetDateTimeTypeAdapter(); + private static LocalDateTypeAdapter localDateTypeAdapter = new LocalDateTypeAdapter(); + {{/jsr310}} + private static ByteArrayAdapter byteArrayAdapter = new ByteArrayAdapter(); + + @SuppressWarnings("unchecked") + public static GsonBuilder createGson() { + GsonFireBuilder fireBuilder = new GsonFireBuilder() + {{#models}} + {{#model}} + {{#discriminator}} + .registerTypeSelector({{modelPackage}}.{{classname}}.class, new TypeSelector<{{modelPackage}}.{{classname}}>() { + @Override + public Class getClassForElement(JsonElement readElement) { + Map classByDiscriminatorValue = new HashMap(); + {{#mappedModels}} + classByDiscriminatorValue.put("{{mappingName}}"{{^discriminatorCaseSensitive}}.toUpperCase(Locale.ROOT){{/discriminatorCaseSensitive}}, {{modelPackage}}.{{modelName}}.class); + {{/mappedModels}} + classByDiscriminatorValue.put("{{name}}"{{^discriminatorCaseSensitive}}.toUpperCase(Locale.ROOT){{/discriminatorCaseSensitive}}, {{modelPackage}}.{{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; + } + + static { + GsonBuilder gsonBuilder = createGson(); + gsonBuilder.registerTypeAdapter(Date.class, dateTypeAdapter); + gsonBuilder.registerTypeAdapter(java.sql.Date.class, sqlDateTypeAdapter); + {{#joda}} + gsonBuilder.registerTypeAdapter(DateTime.class, dateTimeTypeAdapter); + gsonBuilder.registerTypeAdapter(LocalDate.class, localDateTypeAdapter); + {{/joda}} + {{#jsr310}} + gsonBuilder.registerTypeAdapter(OffsetDateTime.class, offsetDateTimeTypeAdapter); + gsonBuilder.registerTypeAdapter(LocalDate.class, localDateTypeAdapter); + {{/jsr310}} + gsonBuilder.registerTypeAdapter(byte[].class, byteArrayAdapter); + {{#models}} + {{#model}} + {{^isEnum}} + {{^hasChildren}} + gsonBuilder.registerTypeAdapterFactory(new {{modelPackage}}.{{{classname}}}.CustomTypeAdapterFactory()); + {{/hasChildren}} + {{/isEnum}} + {{/model}} + {{/models}} + gson = gsonBuilder.create(); + } + + /** + * Get Gson. + * + * @return Gson + */ + public static Gson getGson() { + return gson; + } + + /** + * Set Gson. + * + * @param gson Gson + */ + public static void setGson(Gson gson) { + JSON.gson = gson; + } + + public static void setLenientOnJson(boolean lenientOnJson) { + isLenientOnJson = lenientOnJson; + } + + /** + * Serialize the given Java object into JSON string. + * + * @param obj Object + * @return String representation of the JSON + */ + public static 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 static T deserialize(String body, Type returnType) { + try { + if (isLenientOnJson) { + JsonReader jsonReader = new JsonReader(new StringReader(body)); + // see https://google-gson.googlecode.com/svn/trunk/gson/docs/javadocs/com/google/gson/stream/JsonReader.html#setLenient(boolean) + 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); + } + } + } + + /** + * Deserialize the given JSON InputStream to a Java object. + * + * @param Type + * @param inputStream The JSON InputStream + * @param returnType The type to deserialize into + * @return The deserialized Java object + */ + @SuppressWarnings("unchecked") + public static T deserialize(InputStream inputStream, Type returnType) throws IOException { + try (InputStreamReader reader = new InputStreamReader(inputStream, StandardCharsets.UTF_8)) { + if (isLenientOnJson) { + // see https://google-gson.googlecode.com/svn/trunk/gson/docs/javadocs/com/google/gson/stream/JsonReader.html#setLenient(boolean) + JsonReader jsonReader = new JsonReader(reader); + jsonReader.setLenient(true); + return gson.fromJson(jsonReader, returnType); + } else { + return gson.fromJson(reader, returnType); + } + } + } + + /** + * Gson TypeAdapter for Byte Array type + */ + public static 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 static 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 static void setDateTimeFormat(DateTimeFormatter dateFormat) { + dateTimeTypeAdapter.setFormat(dateFormat); + } + + public static void setLocalDateFormat(DateTimeFormatter dateFormat) { + localDateTypeAdapter.setFormat(dateFormat); + } + + {{/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 static 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 static void setOffsetDateTimeFormat(DateTimeFormatter dateFormat) { + offsetDateTimeTypeAdapter.setFormat(dateFormat); + } + + public static void setLocalDateFormat(DateTimeFormatter dateFormat) { + localDateTypeAdapter.setFormat(dateFormat); + } + + {{/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 static void setDateFormat(DateFormat dateFormat) { + dateTypeAdapter.setFormat(dateFormat); + } + + public static void setSqlDateFormat(DateFormat dateFormat) { + sqlDateTypeAdapter.setFormat(dateFormat); + } +}