Add more java.time adapters

The time extensions require these adapters for anyone using our
gson adapter to serialize/deserialize the DecisionRequest.

Issue-ID: POLICY-2810
Change-Id: I64a7e4a5a256c77bd67dab867664e41b61cd0050
Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>

1 files changed, 68 insertions, 0 deletions

diff --git a/gson/src/main/java/org/onap/policy/common/gson/OffsetDateTimeTypeAdapter.java b/gson/src/main/java/org/onap/policy/common/gson/OffsetDateTimeTypeAdapter.java
new file mode 100644
index 00000000..faf5ffd1
--- /dev/null
+++ b/gson/src/main/java/org/onap/policy/common/gson/OffsetDateTimeTypeAdapter.java
@@ -0,0 +1,68 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 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.OffsetDateTime;
+import java.time.format.DateTimeFormatter;
+import java.time.format.DateTimeParseException;
+
+public class OffsetDateTimeTypeAdapter extends TypeAdapter<OffsetDateTime> {
+    private DateTimeFormatter formatter;
+
+    public OffsetDateTimeTypeAdapter() {
+        this(DateTimeFormatter.ISO_OFFSET_DATE_TIME);
+    }
+
+    public OffsetDateTimeTypeAdapter(DateTimeFormatter formatter) {
+        this.formatter = formatter;
+    }
+
+    @Override
+    public OffsetDateTime read(JsonReader in) throws IOException {
+        try {
+            if (in.peek() == JsonToken.NULL) {
+                in.nextNull();
+                return null;
+            } else {
+                return OffsetDateTime.parse(in.nextString(), formatter);
+            }
+
+        } catch (DateTimeParseException e) {
+            throw new JsonParseException("invalid date", e);
+        }
+    }
+
+    @Override
+    public void write(JsonWriter out, OffsetDateTime value) throws IOException {
+        if (value == null) {
+            out.nullValue();
+        } else {
+            String text = value.format(formatter);
+            out.value(text);
+        }
+    }
+}