1 files changed, 125 insertions, 0 deletions
diff --git a/utils/src/main/java/org/onap/policy/common/utils/coder/StandardCoderInstantAsMillis.java b/utils/src/main/java/org/onap/policy/common/utils/coder/StandardCoderInstantAsMillis.java
new file mode 100644
index 00000000..fbb53b91
--- /dev/null
+++ b/utils/src/main/java/org/onap/policy/common/utils/coder/StandardCoderInstantAsMillis.java
@@ -0,0 +1,125 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2020 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.utils.coder;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonElement;
+import java.io.Reader;
+import java.io.Writer;
+import java.time.Instant;
+import lombok.AccessLevel;
+import lombok.Getter;
+import org.onap.policy.common.gson.GsonMessageBodyHandler;
+import org.onap.policy.common.gson.InstantAsMillisTypeAdapter;
+
+/**
+ * JSON encoder and decoder using the "standard" mechanism, but encodes Instant fields as
+ * Long milliseconds.
+ */
+public class StandardCoderInstantAsMillis extends StandardCoder {
+
+    /**
+     * Gson object used to encode and decode messages.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private static final Gson GSON;
+
+    /**
+     * Gson object used to encode messages in "pretty" format.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private static final Gson GSON_PRETTY;
+
+    static {
+        GsonBuilder builder = GsonMessageBodyHandler
+                        .configBuilder(new GsonBuilder().registerTypeAdapter(StandardCoderObject.class,
+                                        new StandardTypeAdapter()))
+                        .registerTypeAdapter(Instant.class, new InstantAsMillisTypeAdapter());
+
+        GSON = builder.create();
+        GSON_PRETTY = builder.setPrettyPrinting().create();
+    }
+
+    /**
+     * Constructs the object.
+     */
+    public StandardCoderInstantAsMillis() {
+        super();
+    }
+
+    @Override
+    protected String toPrettyJson(Object object) {
+        return GSON_PRETTY.toJson(object);
+    }
+
+    @Override
+    public StandardCoderObject toStandard(Object object) throws CoderException {
+        try {
+            return new StandardCoderObject(GSON.toJsonTree(object));
+
+        } catch (RuntimeException e) {
+            throw new CoderException(e);
+        }
+    }
+
+    @Override
+    public <T> T fromStandard(StandardCoderObject sco, Class<T> clazz) throws CoderException {
+        try {
+            return GSON.fromJson(sco.getData(), clazz);
+
+        } catch (RuntimeException e) {
+            throw new CoderException(e);
+        }
+    }
+
+    // the remaining methods are wrappers that can be overridden by junit tests
+
+    @Override
+    protected JsonElement toJsonTree(Object object) {
+        return GSON.toJsonTree(object);
+    }
+
+    @Override
+    protected String toJson(Object object) {
+        return GSON.toJson(object);
+    }
+
+    @Override
+    protected void toJson(Writer target, Object object) {
+        GSON.toJson(object, object.getClass(), target);
+    }
+
+    @Override
+    protected <T> T fromJson(JsonElement json, Class<T> clazz) {
+        return convertFromDouble(clazz, GSON.fromJson(json, clazz));
+    }
+
+    @Override
+    protected <T> T fromJson(String json, Class<T> clazz) {
+        return convertFromDouble(clazz, GSON.fromJson(json, clazz));
+    }
+
+    @Override
+    protected <T> T fromJson(Reader source, Class<T> clazz) {
+        return convertFromDouble(clazz, GSON.fromJson(source, clazz));
+    }
+}