RecordLoader.java

/*
   Copyright 2011, Lightbox Technologies, Inc

   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.lightboxtechnologies.nsrl;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;

import org.apache.commons.io.IOUtils;

/**
 * A class which loads NSRL record files.
 *
 * @author Joel Uckelman
 */
public class RecordLoader {
  public void load(Reader r, LineHandler lh) throws IOException {
    BufferedReader br = null;
    try {
      br = new BufferedReader(r);

      // first line gives column names, skip it
      br.readLine();

      // process each line
      String line;
      long linenum = 0;
      while ((line = br.readLine()) != null) {
        ++linenum;
        lh.handle(line, linenum);
      }

      br.close();
    }
    finally {
      IOUtils.closeQuietly(br);
    }
  }

  public void load(InputStream in, LineHandler lh) throws IOException {
    Reader r = null;
    try {
      r = new InputStreamReader(in);
      load(r, lh);
      r.close();
    }
    finally {
      IOUtils.closeQuietly(r);
    }
  }

  public void load(String filename, LineHandler lh) throws IOException {
    Reader r = null;
    try {
      r = new FileReader(filename);
      load(r, lh);
      r.close();
    }
    finally {
      IOUtils.closeQuietly(r);
    }
  }
}