1 files changed, 61 insertions, 0 deletions
diff --git a/dcae-analytics/dcae-analytics-model/src/main/java/org/onap/dcae/analytics/model/util/function/JsonToJavaObjectBiFunction.java b/dcae-analytics/dcae-analytics-model/src/main/java/org/onap/dcae/analytics/model/util/function/JsonToJavaObjectBiFunction.java
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index 0000000..7910435
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+++ b/dcae-analytics/dcae-analytics-model/src/main/java/org/onap/dcae/analytics/model/util/function/JsonToJavaObjectBiFunction.java
@@ -0,0 +1,61 @@
+/*
+ * ================================================================================
+ * Copyright (c) 2018 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.dcae.analytics.model.util.function;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.io.IOException;
+import java.util.Optional;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Converts given Json String to Java Object if possible
+ *
+ * @param <T> Target Java Object class Type for JSON String
+ *
+ * @author Rajiv Singla
+ */
+public class JsonToJavaObjectBiFunction<T> implements BiFunctionExtension<TypeReference<T>, String, Optional<T>> {
+
+    private static final Logger logger = LoggerFactory.getLogger(JsonToJavaObjectBiFunction.class);
+
+    private final ObjectMapper objectMapper;
+
+    public JsonToJavaObjectBiFunction(final ObjectMapper objectMapper) {
+        this.objectMapper = objectMapper;
+    }
+
+
+    @Override
+    public Optional<T> apply(final TypeReference<T> typeReference, final String jsonString) {
+
+        try {
+            return Optional.of(objectMapper.readValue(jsonString, typeReference));
+        } catch (IOException e) {
+            logger.error("Unable to convert given JSON String to Java Object. JSON String: " + jsonString, e);
+        }
+
+        return Optional.empty();
+    }
+
+}