SerialUtils.java

/***************************************************************************
 * Copyright (c) 2014-2015 VMware, Inc. 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.
 ***************************************************************************/
package com.vmware.bdd.software.mgmt.plugin.utils;

import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 * Author: Xiaoding Bian
 * Date: 5/23/14
 * Time: 3:50 PM
 */
public class SerialUtils {

   public static String dataFromFile(String filePath) throws IOException,
         FileNotFoundException {
      StringBuffer dataStringBuffer = new StringBuffer();
      FileInputStream fis = null;
      InputStreamReader inputStreamReader = null;
      BufferedReader bufferedReader = null;
      try {
         fis = new FileInputStream(filePath);
         inputStreamReader = new InputStreamReader(fis, "UTF-8");
         bufferedReader = new BufferedReader(inputStreamReader);
         String line = "";
         while ((line = bufferedReader.readLine()) != null) {
            dataStringBuffer.append(line);
            dataStringBuffer.append("\n");
         }
      } finally {
         if (fis != null) {
            fis.close();
         }
         if (inputStreamReader != null) {
            inputStreamReader.close();
         }
         if (bufferedReader != null) {
            bufferedReader.close();
         }
      }
      return dataStringBuffer.toString();
   }

   public static <T> T getObjectByJsonString(Class<T> entityType, String jsonString) throws JsonParseException,
         JsonMappingException, IOException {
      ObjectMapper mapper = getMapper();
      T mappedObject = null;
      mappedObject = mapper.readValue(jsonString, entityType);
      return mappedObject;
   }

   private static ObjectMapper getMapper() {
      ObjectMapper mapper = new ObjectMapper();
      mapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
      return mapper;
   }
}