1 files changed, 83 insertions, 0 deletions
diff --git a/gson/src/main/java/org/onap/policy/common/gson/internal/AnyGetterSerializer.java b/gson/src/main/java/org/onap/policy/common/gson/internal/AnyGetterSerializer.java
new file mode 100644
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--- /dev/null
+++ b/gson/src/main/java/org/onap/policy/common/gson/internal/AnyGetterSerializer.java
@@ -0,0 +1,83 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2019 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.internal;
+
+import com.google.gson.Gson;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+import java.lang.reflect.Method;
+import java.util.Map.Entry;
+import java.util.Set;
+
+/**
+ * Serializer for methods having a JsonAnyGetter annotation.
+ */
+public class AnyGetterSerializer extends Lifter implements Serializer {
+
+    public static final String NOT_AN_OBJECT_ERR = "expecting a JsonObject for ";
+
+    /**
+     * Constructs the object.
+     *
+     * @param gson Gson object providing type adapters
+     * @param propName property name associated with the lifted field
+     * @param unliftedProps property names that should not be lifted
+     * @param getter method used to get the item from within an object
+     */
+    public AnyGetterSerializer(Gson gson, Set<String> unliftedProps, Method getter) {
+        super(gson, unliftedProps, getter, getter.getGenericReturnType());
+    }
+
+    @Override
+    public void addToTree(Object source, JsonObject target) {
+        // get the value from the object
+        Object value = invoke(source);
+        if (value == null) {
+            // nothing to lift
+            return;
+        }
+
+        JsonElement inner = toJsonTree(value);
+        if (!inner.isJsonObject()) {
+            throw new JsonParseException(makeError(NOT_AN_OBJECT_ERR));
+        }
+
+        // lift items from inner into the target
+        copyLiftedItems(inner.getAsJsonObject(), target);
+    }
+
+    /**
+     * Copies lifted items from one tree into another, without removing them from the
+     * source tree.
+     *
+     * @param source tree from which items are to be copied
+     * @param target tree into which items are to be copied
+     */
+    private void copyLiftedItems(JsonObject source, JsonObject target) {
+        for (Entry<String, JsonElement> ent : source.entrySet()) {
+            String name = ent.getKey();
+            if (shouldLift(name)) {
+                target.add(name, ent.getValue());
+            }
+        }
+    }
+}