com.google.gplus.serializer.util.GPlusEventClassifier.java Source code

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Here is the source code for com.google.gplus.serializer.util.GPlusEventClassifier.java

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/*
 * 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 com.google.gplus.serializer.util;

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 org.apache.streams.jackson.StreamsJacksonMapper;

import java.io.IOException;
import java.io.Serializable;

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\"";

    public static Class detectClass(String json) {
        Preconditions.checkNotNull(json);
        Preconditions.checkArgument(StringUtils.isNotEmpty(json));

        ObjectNode objectNode;
        try {
            objectNode = (ObjectNode) mapper.readTree(json);
        } catch (IOException e) {
            e.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;
        }
    }
}