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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2020-2021 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.common.gson;
import com.google.gson.JsonParseException;
import com.google.gson.TypeAdapter;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonToken;
import com.google.gson.stream.JsonWriter;
import java.io.IOException;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
/**
* GSON Type Adapter for "ZonedDateTime" fields, that uses the standard
* ISO_ZONED_DATE_TIME formatter.
*/
public class ZonedDateTimeTypeAdapter extends TypeAdapter<ZonedDateTime> {
private static final DateTimeFormatter DEFAULT_FORMATTER = DateTimeFormatter.ISO_ZONED_DATE_TIME;
private final DateTimeFormatter formatter;
/**
* Constructs an adapter that uses the ISO_ZONED_DATE_TIME formatter.
*/
public ZonedDateTimeTypeAdapter() {
this(DEFAULT_FORMATTER);
}
/**
* Constructs an adapter that uses the specified formatter for reading and writing.
* @param formatter date-time formatter
*/
public ZonedDateTimeTypeAdapter(DateTimeFormatter formatter) {
this.formatter = formatter;
}
@Override
public ZonedDateTime read(JsonReader in) throws IOException {
try {
if (in.peek() == JsonToken.NULL) {
in.nextNull();
return null;
} else {
return ZonedDateTime.parse(in.nextString(), formatter);
}
} catch (DateTimeParseException e) {
throw new JsonParseException("invalid date", e);
}
}
@Override
public void write(JsonWriter out, ZonedDateTime value) throws IOException {
if (value == null) {
out.nullValue();
} else {
String text = value.format(formatter);
out.value(text);
}
}
}
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