Mars Lan 5f5c0937d1 Rename web, backend-service (#490)
* Rename web to wherehows-api and update README.

* Rename backend-service to wherehows-backend

* Rename metadata-etl to wherehows-etl

* Rename hadoop-dataset-extractor-standalone to wherehows-hadoop
2017-07-10 13:42:56 -07:00

66 lines
1.8 KiB
Java

/**
* 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();
}
}