diff options
Diffstat (limited to 'src/main/java/org/onap/a1pesimulator/util/JsonUtils.java')
-rw-r--r-- | src/main/java/org/onap/a1pesimulator/util/JsonUtils.java | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/main/java/org/onap/a1pesimulator/util/JsonUtils.java b/src/main/java/org/onap/a1pesimulator/util/JsonUtils.java new file mode 100644 index 0000000..9263bc1 --- /dev/null +++ b/src/main/java/org/onap/a1pesimulator/util/JsonUtils.java @@ -0,0 +1,99 @@ +/* + * Copyright (C) 2021 Samsung Electronics + * 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 + */ + +package org.onap.a1pesimulator.util; + +import com.fasterxml.jackson.core.JsonProcessingException; +import com.fasterxml.jackson.databind.DeserializationFeature; +import com.fasterxml.jackson.databind.ObjectMapper; +import java.io.FileReader; +import java.io.IOException; +import java.net.URL; +import java.text.MessageFormat; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public enum JsonUtils { + + INSTANCE; + + private static final Logger log = LoggerFactory.getLogger(JsonUtils.class); + + private ObjectMapper mapper; + + private JsonUtils() { + this.mapper = new ObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); + } + + public String objectToPrettyString(Object object) { + try { + return mapper.writerWithDefaultPrettyPrinter().writeValueAsString(object); + } catch (JsonProcessingException e) { + throw new JsonUtilsException("Cannot serialize object", e); + } + } + + @SuppressWarnings("unchecked") + public <T> T clone(T object) { + String stringValue; + try { + stringValue = mapper.writeValueAsString(object); + return (T) mapper.readValue(stringValue, object.getClass()); + } catch (JsonProcessingException e) { + throw new JsonUtilsException("Cannot clone object", e); + } + } + + public <T> T deserializeFromFile(String fileName, Class<T> clazz) { + try { + return mapper.readValue(new FileReader(fileName), clazz); + } catch (IOException e) { + String errorMsg = MessageFormat.format("Could not deserialize from file: {0} into {1}", fileName, + clazz.getSimpleName()); + log.error(errorMsg, e); + throw new JsonUtilsException(errorMsg, e); + } + } + + public <T> T deserializeFromFileUrl(URL url, Class<T> clazz) { + try { + return mapper.readValue(url, clazz); + } catch (IOException e) { + String errorMsg = MessageFormat.format("Could not deserialize from file URL: {0} into {1}", url, + clazz.getSimpleName()); + log.error(errorMsg, e); + throw new JsonUtilsException(errorMsg, e); + } + } + + public <T> T deserialize(String string, Class<T> clazz) throws JsonUtilsException { + try { + return mapper.readValue(string, clazz); + } catch (IOException e) { + String errorMsg = MessageFormat + .format("Could not deserialize into {0} from object: {1}", clazz.getSimpleName(), + string); + log.error(errorMsg, e); + throw new JsonUtilsException(errorMsg, e); + } + } + + public static class JsonUtilsException extends RuntimeException { + + private static final long serialVersionUID = 1L; + + public JsonUtilsException(String message, Throwable throwable) { + super(message, throwable); + } + } +} |