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>

4 files changed, 289 insertions, 0 deletions

diff --git a/gson/src/test/java/org/onap/policy/common/gson/LocalDateTypeAdapterTest.java b/gson/src/test/java/org/onap/policy/common/gson/LocalDateTypeAdapterTest.java
new file mode 100644
index 00000000..17acf5e6
--- /dev/null
+++ b/gson/src/test/java/org/onap/policy/common/gson/LocalDateTypeAdapterTest.java
@@ -0,0 +1,73 @@
+/*-
+ * ============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 static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.junit.Assert.assertEquals;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonParseException;
+import java.time.LocalDate;
+import lombok.ToString;
+import org.junit.Test;
+
+public class LocalDateTypeAdapterTest {
+    private static Gson gson =
+            new GsonBuilder().registerTypeAdapter(LocalDate.class, new LocalDateTypeAdapter()).create();
+    private static final String TEST_DATE = "2020-01-01";
+
+    @Test
+    public void test() {
+        InterestingFields data = new InterestingFields();
+        data.date = LocalDate.parse(TEST_DATE);
+
+        String json = gson.toJson(data);
+
+        // instant should be encoded as a number, without quotes
+        assertThat(json).doesNotContain("year").contains(TEST_DATE);
+
+        InterestingFields data2 = gson.fromJson(json, InterestingFields.class);
+        assertEquals(data.toString(), data2.toString());
+
+        // try when the date-time string is invalid
+        String json2 = json.replace("2020", "invalid-date");
+        assertThatThrownBy(() -> gson.fromJson(json2, InterestingFields.class)).isInstanceOf(JsonParseException.class)
+                        .hasMessageContaining("invalid date");
+
+        // null output
+        data.date = null;
+        json = gson.toJson(data);
+        data2 = gson.fromJson(json, InterestingFields.class);
+        assertEquals(data.toString(), data2.toString());
+
+        // null input
+        data2 = gson.fromJson("{\"date\":null}", InterestingFields.class);
+        assertEquals(data.toString(), data2.toString());
+    }
+
+    @ToString
+    private static class InterestingFields {
+        private LocalDate date;
+    }
+
+}
diff --git a/gson/src/test/java/org/onap/policy/common/gson/OffsetDateTimeAdapterTest.java b/gson/src/test/java/org/onap/policy/common/gson/OffsetDateTimeAdapterTest.java
new file mode 100644
index 00000000..a0bcb1b2
--- /dev/null
+++ b/gson/src/test/java/org/onap/policy/common/gson/OffsetDateTimeAdapterTest.java
@@ -0,0 +1,72 @@
+/*-
+ * ============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 static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.junit.Assert.assertEquals;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonParseException;
+import java.time.OffsetDateTime;
+import lombok.ToString;
+import org.junit.Test;
+
+public class OffsetDateTimeAdapterTest {
+    private static Gson gson =
+            new GsonBuilder().registerTypeAdapter(OffsetDateTime.class, new OffsetDateTimeTypeAdapter()).create();
+    private static final String TEST_DATE = "2020-01-01T12:00:00.999+05:00";
+
+    @Test
+    public void test() {
+        InterestingFields data = new InterestingFields();
+        data.date = OffsetDateTime.parse(TEST_DATE);
+
+        String json = gson.toJson(data);
+
+        // instant should be encoded as a number, without quotes
+        assertThat(json).doesNotContain("year").contains(TEST_DATE);
+
+        InterestingFields data2 = gson.fromJson(json, InterestingFields.class);
+        assertEquals(data.toString(), data2.toString());
+
+        // try when the date-time string is invalid
+        String json2 = json.replace("2020", "invalid-date");
+        assertThatThrownBy(() -> gson.fromJson(json2, InterestingFields.class)).isInstanceOf(JsonParseException.class)
+                        .hasMessageContaining("invalid date");
+
+        // null output
+        data.date = null;
+        json = gson.toJson(data);
+        data2 = gson.fromJson(json, InterestingFields.class);
+        assertEquals(data.toString(), data2.toString());
+
+        // null input
+        data2 = gson.fromJson("{\"date\":null}", InterestingFields.class);
+        assertEquals(data.toString(), data2.toString());
+    }
+
+    @ToString
+    private static class InterestingFields {
+        private OffsetDateTime date;
+    }
+}
diff --git a/gson/src/test/java/org/onap/policy/common/gson/OffsetTimeTypeAdapterTest.java b/gson/src/test/java/org/onap/policy/common/gson/OffsetTimeTypeAdapterTest.java
new file mode 100644
index 00000000..8098af98
--- /dev/null
+++ b/gson/src/test/java/org/onap/policy/common/gson/OffsetTimeTypeAdapterTest.java
@@ -0,0 +1,72 @@
+/*-
+ * ============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 static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.junit.Assert.assertEquals;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonParseException;
+import java.time.OffsetTime;
+import lombok.ToString;
+import org.junit.Test;
+
+public class OffsetTimeTypeAdapterTest {
+    private static Gson gson =
+            new GsonBuilder().registerTypeAdapter(OffsetTime.class, new OffsetTimeTypeAdapter()).create();
+    private static final String TEST_TIME = "12:00:00.999+05:00";
+
+    @Test
+    public void test() {
+        InterestingFields data = new InterestingFields();
+        data.time = OffsetTime.parse(TEST_TIME);
+
+        String json = gson.toJson(data);
+
+        // instant should be encoded as a number, without quotes
+        assertThat(json).doesNotContain("foo").contains(TEST_TIME);
+
+        InterestingFields data2 = gson.fromJson(json, InterestingFields.class);
+        assertEquals(data.toString(), data2.toString());
+
+        // try when the date-time string is invalid
+        String json2 = json.replace("12", "invalid-time");
+        assertThatThrownBy(() -> gson.fromJson(json2, InterestingFields.class)).isInstanceOf(JsonParseException.class)
+                        .hasMessageContaining("invalid time");
+
+        // null output
+        data.time = null;
+        json = gson.toJson(data);
+        data2 = gson.fromJson(json, InterestingFields.class);
+        assertEquals(data.toString(), data2.toString());
+
+        // null input
+        data2 = gson.fromJson("{\"time\":null}", InterestingFields.class);
+        assertEquals(data.toString(), data2.toString());
+    }
+
+    @ToString
+    private static class InterestingFields {
+        private OffsetTime time;
+    }
+}
diff --git a/gson/src/test/java/org/onap/policy/common/gson/ZoneOffsetTypeAdapterTest.java b/gson/src/test/java/org/onap/policy/common/gson/ZoneOffsetTypeAdapterTest.java
new file mode 100644
index 00000000..d9a33169
--- /dev/null
+++ b/gson/src/test/java/org/onap/policy/common/gson/ZoneOffsetTypeAdapterTest.java
@@ -0,0 +1,72 @@
+/*-
+ * ============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 static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.junit.Assert.assertEquals;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonParseException;
+import java.time.ZoneOffset;
+import lombok.ToString;
+import org.junit.Test;
+
+public class ZoneOffsetTypeAdapterTest {
+    private static Gson gson =
+            new GsonBuilder().registerTypeAdapter(ZoneOffset.class, new ZoneOffsetTypeAdapter()).create();
+    private static final String TEST_ZONE = "+05:00";
+
+    @Test
+    public void test() {
+        InterestingFields data = new InterestingFields();
+        data.zone = ZoneOffset.of(TEST_ZONE);
+
+        String json = gson.toJson(data);
+
+        // instant should be encoded as a number, without quotes
+        assertThat(json).doesNotContain("foo").contains(TEST_ZONE);
+
+        InterestingFields data2 = gson.fromJson(json, InterestingFields.class);
+        assertEquals(data.toString(), data2.toString());
+
+        // try when the date-time string is invalid
+        String json2 = json.replace("05", "invalid-zone");
+        assertThatThrownBy(() -> gson.fromJson(json2, InterestingFields.class)).isInstanceOf(JsonParseException.class)
+                        .hasMessageContaining("invalid zone");
+
+        // null output
+        data.zone = null;
+        json = gson.toJson(data);
+        data2 = gson.fromJson(json, InterestingFields.class);
+        assertEquals(data.toString(), data2.toString());
+
+        // null input
+        data2 = gson.fromJson("{\"zone\":null}", InterestingFields.class);
+        assertEquals(data.toString(), data2.toString());
+    }
+
+    @ToString
+    private static class InterestingFields {
+        private ZoneOffset zone;
+    }
+}