diff options
Diffstat (limited to 'gson/src/main/java/org/onap/policy/common/gson/InstantAsMillisTypeAdapter.java')
-rw-r--r-- | gson/src/main/java/org/onap/policy/common/gson/InstantAsMillisTypeAdapter.java | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/gson/src/main/java/org/onap/policy/common/gson/InstantAsMillisTypeAdapter.java b/gson/src/main/java/org/onap/policy/common/gson/InstantAsMillisTypeAdapter.java new file mode 100644 index 00000000..c38a3e9b --- /dev/null +++ b/gson/src/main/java/org/onap/policy/common/gson/InstantAsMillisTypeAdapter.java @@ -0,0 +1,54 @@ +/*- + * ============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.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.Instant; + +/** + * GSON Type Adapter for "Instant" fields, that encodes them as milliseconds. + */ +public class InstantAsMillisTypeAdapter extends TypeAdapter<Instant> { + + @Override + public void write(JsonWriter out, Instant value) throws IOException { + if (value == null) { + out.nullValue(); + } else { + out.value(value.toEpochMilli()); + } + } + + @Override + public Instant read(JsonReader in) throws IOException { + if (in.peek() == JsonToken.NULL) { + in.nextNull(); + return null; + } else { + var millis = in.nextLong(); + return Instant.ofEpochMilli(millis); + } + } +} |