/** * Copyright 2015 LinkedIn Corp. 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. */ package utils; import com.fasterxml.jackson.databind.JsonNode; /** * Created by zechen on 10/16/15. */ public class JsonUtil { public static Object getJsonValue(JsonNode input, String name, Class type) throws IllegalArgumentException { return getJsonValue(input, name, type, true, null); } public static Object getJsonValue(JsonNode input, String name, Class type, Object defaultValue) throws IllegalArgumentException { return getJsonValue(input, name, type, false, defaultValue); } public static Object getJsonValue(JsonNode input, String name, Class type, boolean isRequired, Object defaultValue) throws IllegalArgumentException { JsonNode node = input.findPath(name); if (node.isMissingNode() || node.isNull()) { if (isRequired) { throw new IllegalArgumentException(name + " is required!"); } else { return defaultValue; } } if (type.equals(String.class)) { return node.textValue(); } if (type.equals(Integer.class)) { return node.asInt(); } if (type.equals(Long.class)) { return node.asLong(); } if (type.equals(Boolean.class)) { return node.asBoolean(); } if (type.equals(Double.class)) { return node.asDouble(); } return node.asText(); } }