1 files changed, 69 insertions, 0 deletions
diff --git a/gson/src/main/java/org/onap/policy/common/gson/internal/MethodAdapter.java b/gson/src/main/java/org/onap/policy/common/gson/internal/MethodAdapter.java
new file mode 100644
index 00000000..579864da
--- /dev/null
+++ b/gson/src/main/java/org/onap/policy/common/gson/internal/MethodAdapter.java
@@ -0,0 +1,69 @@
+/*
+ * ============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.JsonParseException;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Type;
+
+/**
+ * Super class of adapters used to serialize and de-serialize a method.
+ */
+public class MethodAdapter extends Adapter {
+
+    public static final String INVOKE_ERR = "cannot invoke method to serialize/deserialize: ";
+
+    /**
+     * Method used to access the item within an object.
+     */
+    private final Method accessor;
+
+    /**
+     * Constructs the object.
+     *
+     * @param gson Gson object providing type adapters
+     * @param accessor method used to access the item from within an object
+     * @param type the class of value on which this operates
+     */
+    public MethodAdapter(Gson gson, Method accessor, Type type) {
+        super(gson, accessor, type);
+
+        this.accessor = accessor;
+    }
+
+    /**
+     * Invokes the accessor method.
+     *
+     * @param self object on which to invoke the method
+     * @param args arguments to be passed to the method
+     * @return the method's result
+     */
+    public Object invoke(Object self, Object... args) {
+        try {
+            return accessor.invoke(self, args);
+
+        } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
+            throw new JsonParseException(makeError(INVOKE_ERR), e);
+        }
+    }
+}