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Diffstat (limited to 'catalog-dao/src/main/java/org/openecomp/sdc/be/dao/utils/JsonUtil.java')
| -rw-r--r-- | catalog-dao/src/main/java/org/openecomp/sdc/be/dao/utils/JsonUtil.java | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/catalog-dao/src/main/java/org/openecomp/sdc/be/dao/utils/JsonUtil.java b/catalog-dao/src/main/java/org/openecomp/sdc/be/dao/utils/JsonUtil.java new file mode 100644 index 0000000000..00b6d5e894 --- /dev/null +++ b/catalog-dao/src/main/java/org/openecomp/sdc/be/dao/utils/JsonUtil.java @@ -0,0 +1,209 @@ +/*- + * ============LICENSE_START======================================================= + * SDC + * ================================================================================ + * Copyright (C) 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.openecomp.sdc.be.dao.utils; + +import java.io.IOException; +import java.io.InputStream; +import java.util.HashMap; +import java.util.List; +import java.util.Map; + +import com.fasterxml.jackson.annotation.JsonInclude; +import com.fasterxml.jackson.core.JsonParseException; +import com.fasterxml.jackson.core.type.TypeReference; +import com.fasterxml.jackson.databind.JavaType; +import com.fasterxml.jackson.databind.JsonMappingException; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.fasterxml.jackson.databind.SerializationFeature; + +/** + * Simple utility for JSon processing. + */ +public final class JsonUtil { + private static ObjectMapper getOneObjectMapper() { + ObjectMapper mapper = new ObjectMapper(); + mapper.enable(SerializationFeature.INDENT_OUTPUT); + mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL); + mapper.configure(SerializationFeature.WRITE_NULL_MAP_VALUES, false); + return mapper; + } + + private JsonUtil() { + } + + // /** + // * Parse a {@link RestResponse} by using the specified dataType as the + // expected data object's class. + // * + // * @param responseAsString + // * The {@link RestResponse} as a JSon String + // * @param dataType + // * The type of the data object. + // * @return The parsed {@link RestResponse} object matching the given JSon. + // * @throws JsonParseException + // * In case of a JSon parsing issue. + // * @throws JsonMappingException + // * In case of a JSon parsing issue. + // * @throws IOException + // * In case of an IO error. + // */ + // public static <T> RestResponse<T> read(String responseAsString, Class<T> + // dataType) throws IOException { + // ObjectMapper mapper = getOneObjectMapper(); + // JavaType restResponseType = + // mapper.getTypeFactory().constructParametricType(RestResponse.class, + // dataType); + // return mapper.readValue(responseAsString, restResponseType); + // } + + /** + * Deserialize json text to object + * + * @param objectText + * @param objectClass + * @return + * @throws JsonParseException + * @throws JsonMappingException + * @throws IOException + */ + public static <T> T readObject(String objectText, Class<T> objectClass) throws IOException { + return getOneObjectMapper().readValue(objectText, objectClass); + } + + /** + * Deserialize json stream to object + * + * @param jsonStream + * @param objectClass + * @return + * @throws JsonParseException + * @throws JsonMappingException + * @throws IOException + */ + public static <T> T readObject(InputStream jsonStream, Class<T> objectClass) throws IOException { + return getOneObjectMapper().readValue(jsonStream, objectClass); + } + + /** + * Deserialize json text to object + * + * @param objectText + * @return + * @throws JsonParseException + * @throws JsonMappingException + * @throws IOException + */ + public static <T> T readObject(String objectText) throws IOException { + TypeReference<T> typeRef = new TypeReference<T>() { + }; + return getOneObjectMapper().readValue(objectText, typeRef); + } + + // /** + // * Parse a {@link RestResponse} without being interested in parameterized + // type + // * + // * @param responseAsString + // * @return + // * @throws JsonParseException + // * @throws JsonMappingException + // * @throws IOException + // */ + // public static RestResponse<?> read(String responseAsString) throws + // IOException { + // return getOneObjectMapper().readValue(responseAsString, + // RestResponse.class); + // } + + // /** + // * Serialize the given object in a JSon String. + // * + // * @param obj + // * The object to serialize. + // * @return The JSon serialization of the given object. + // * @throws JsonProcessingException + // * In case of a failure in serialization. + // */ + // public static String toString(Object obj) throws JsonProcessingException + // { + // return getOneObjectMapper().writeValueAsString(obj); + // } + + /** + * Deserialize the given json string to a map + * + * @param json + * json text + * @return map object + * @throws IOException + */ + public static Map<String, Object> toMap(String json) throws IOException { + ObjectMapper mapper = getOneObjectMapper(); + JavaType mapStringObjectType = mapper.getTypeFactory().constructParametricType(HashMap.class, String.class, + Object.class); + return mapper.readValue(json, mapStringObjectType); + } + + /** + * Deserialize the given json string to a map + * + * @param json + * @param keyTypeClass + * @param valueTypeClass + * @return + * @throws IOException + */ + public static <K, V> Map<K, V> toMap(String json, Class<K> keyTypeClass, Class<V> valueTypeClass) + throws IOException { + ObjectMapper mapper = getOneObjectMapper(); + JavaType mapStringObjectType = mapper.getTypeFactory().constructParametricType(HashMap.class, keyTypeClass, + valueTypeClass); + return mapper.readValue(json, mapStringObjectType); + } + + public static <V> V[] toArray(String json, Class<V> valueTypeClass) throws IOException { + ObjectMapper mapper = getOneObjectMapper(); + JavaType arrayStringObjectType = mapper.getTypeFactory().constructArrayType(valueTypeClass); + return mapper.readValue(json, arrayStringObjectType); + } + + /** + * Deserialize the given json string to a list + * + * @param json + * json text + * @return list object + * @throws IOException + */ + public static <T> List<T> toList(String json, Class<T> clazz) throws IOException { + ObjectMapper mapper = getOneObjectMapper(); + JavaType type = mapper.getTypeFactory().constructCollectionType(List.class, clazz); + return mapper.readValue(json, type); + } + + public static <T> List<T> toList(String json, Class<T> elementClass, Class<?> elementGenericClass) + throws IOException { + ObjectMapper mapper = getOneObjectMapper(); + JavaType elementType = mapper.getTypeFactory().constructParametricType(elementClass, elementGenericClass); + JavaType listType = mapper.getTypeFactory().constructCollectionType(List.class, elementType); + return mapper.readValue(json, listType); + } +} |