FileUtils.java

/*
 * Copyright (C) 2013 The CyanogenMod Project
 *
 * 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.nitrogen.settings.preferences.util;

import android.util.Log;

import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;

public final class FileUtils {
    private static final String TAG = "FileUtils";

    private FileUtils() {
        // this class is not supposed to be instantiated
    }

    /**
     * Reads the first line of text from the given file
     */
    public static String readOneLine(String fileName) {
        String line = null;
        BufferedReader reader = null;

        try {
            reader = new BufferedReader(new FileReader(fileName), 512);
            line = reader.readLine();
        } catch (IOException e) {
            Log.e(TAG, "Could not read from file " + fileName, e);
        } finally {
            try {
                if (reader != null) {
                    reader.close();
                }
            } catch (IOException e) {
                // ignored, not much we can do anyway
            }
        }

        return line;
    }

    /**
     * Writes the given value into the given file
     *
     * @return true on success, false on failure
     */
    public static boolean writeLine(String fileName, String value) {
        try {
            FileOutputStream fos = new FileOutputStream(fileName);
            fos.write(value.getBytes());
            fos.flush();
            fos.close();
        } catch (IOException e) {
            Log.e(TAG, "Could not write to file " + fileName, e);
            return false;
        }

        return true;
    }
}