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Diffstat (limited to 'dcae-analytics-model/src/main/java/org/onap/dcae/apod/analytics/model/util/AnalyticsModelJsonUtils.java')
-rw-r--r-- | dcae-analytics-model/src/main/java/org/onap/dcae/apod/analytics/model/util/AnalyticsModelJsonUtils.java | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/dcae-analytics-model/src/main/java/org/onap/dcae/apod/analytics/model/util/AnalyticsModelJsonUtils.java b/dcae-analytics-model/src/main/java/org/onap/dcae/apod/analytics/model/util/AnalyticsModelJsonUtils.java new file mode 100644 index 0000000..35834d1 --- /dev/null +++ b/dcae-analytics-model/src/main/java/org/onap/dcae/apod/analytics/model/util/AnalyticsModelJsonUtils.java @@ -0,0 +1,104 @@ +/* + * ===============================LICENSE_START====================================== + * dcae-analytics + * ================================================================================ + * Copyright © 2017 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.apod.analytics.model.util; + +import com.fasterxml.jackson.core.JsonProcessingException; +import com.fasterxml.jackson.core.type.TypeReference; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.google.common.base.Suppliers; +import org.onap.dcae.apod.analytics.model.util.json.AnalyticsModelObjectMapperSupplier; + +import java.io.IOException; +import java.io.InputStream; + +/** + * + * @author Rajiv Singla . Creation Date: 11/7/2016. + */ +public abstract class AnalyticsModelJsonUtils { + + /** + * Object mapper to be used for all TCA Json Parsing + */ + protected static final ObjectMapper ANALYTICS_MODEL_OBJECT_MAPPER = + Suppliers.memoize(new AnalyticsModelObjectMapperSupplier()).get(); + + + /** + * Converts Input Stream to given type reference object + * + * @param inputStream input stream + * @param valueTypeRef type reference + * @param <T> type of type reference + * + * @return parsed json object + * + * @throws IOException IO Exception + */ + public static <T> T readValue(InputStream inputStream, TypeReference<T> valueTypeRef) throws IOException { + return ANALYTICS_MODEL_OBJECT_MAPPER.readValue(inputStream, valueTypeRef); + } + + + /** + * Converts Input Stream to given target class object + * + * @param inputStream input stream + * @param targetClass target class type + * @param <T> type of class + * + * @return parsed json object + * + * @throws IOException IO Exception + */ + public static <T> T readValue(InputStream inputStream, Class<T> targetClass) throws IOException { + return ANALYTICS_MODEL_OBJECT_MAPPER.readValue(inputStream, targetClass); + } + + + /** + * Converts given object to JSON string + * + * @param value object that needs to converted to json string + * + * @return json string + * @throws JsonProcessingException Json Processing exception + */ + public static String writeValueAsString(Object value) throws JsonProcessingException { + return ANALYTICS_MODEL_OBJECT_MAPPER.writeValueAsString(value); + } + + + /** + * Method to deserialize JSON content from given JSON content String. + * + * @param jsonString JSON String + * @param objectClass target object class + * @param <T> object class type + * + * @return converted Object from JSON String + * + * @throws IOException IO Exception + */ + public static <T> T readValue(final String jsonString, final Class<T> objectClass) throws IOException { + return ANALYTICS_MODEL_OBJECT_MAPPER.readValue(jsonString, objectClass); + } +} |