/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
*
* 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.apache.streams.gplus.serializer.util;
import org.apache.streams.jackson.StreamsJacksonMapper;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.google.api.services.plus.model.Activity;
import com.google.api.services.plus.model.Person;
import com.google.common.base.Preconditions;
import org.apache.commons.lang.StringUtils;
import java.io.IOException;
import java.io.Serializable;
import java.util.Objects;
/**
* GPlusEventClassifier classifies GPlus Events.
*/
public class GPlusEventClassifier implements Serializable {
private static ObjectMapper mapper = StreamsJacksonMapper.getInstance();
private static final String ACTIVITY_IDENTIFIER = "\"plus#activity\"";
private static final String PERSON_IDENTIFIER = "\"plus#person\"";
/**
* Detect likely class of String json.
* @param json String json
* @return likely class
*/
public static Class detectClass(String json) {
Objects.requireNonNull(json);
Preconditions.checkArgument(StringUtils.isNotEmpty(json));
ObjectNode objectNode;
try {
objectNode = (ObjectNode) mapper.readTree(json);
} catch (IOException ex) {
ex.printStackTrace();
return null;
}
if (objectNode.findValue("kind") != null && objectNode.get("kind").toString().equals(ACTIVITY_IDENTIFIER)) {
return Activity.class;
} else if (objectNode.findValue("kind") != null && objectNode.get("kind").toString().equals(PERSON_IDENTIFIER)) {
return Person.class;
} else {
return ObjectNode.class;
}
}
}