DataFile.java

/*
 * Copyright (c) 2011 The S4 Project, http://s4.io.
 * 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. See accompanying LICENSE file. 
 */
package org.apache.s4.example.model;

import java.util.*;
import java.util.zip.GZIPInputStream;
import java.io.*;

public class DataFile implements Iterable<String> {
    private BufferedReader reader;

    public DataFile(String filePath) throws FileNotFoundException, IOException {

        InputStream is = this.getClass().getResourceAsStream(filePath);

        GZIPInputStream gzip = new GZIPInputStream(is);

        this.reader = new BufferedReader(new InputStreamReader(gzip));
    }

    public void close() throws IOException {
        reader.close();
    }

    public Iterator<String> iterator() {
        return new FileIterator();
    }

    private class FileIterator implements Iterator<String> {
        private String currentLine;

        public boolean hasNext() {
            try {
                currentLine = reader.readLine();
            } catch (Exception ex) {
                currentLine = null;
            }

            return currentLine != null;
        }

        public String next() {
            return currentLine;
        }

        public void remove() {
        }
    }
}