src/com/android/music/utils/LogHelper.java

/*
 * Copyright (C) 2014 The Android Open Source 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.android.music.utils;

import android.util.Log;

public class LogHelper {
    private static final String LOG_PREFIX = "music_";
    private static final int LOG_PREFIX_LENGTH = LOG_PREFIX.length();
    private static final int MAX_LOG_TAG_LENGTH = 23;
    private static final boolean DEBUG = true;

    public static String makeLogTag(String str) {
        if (str.length() > MAX_LOG_TAG_LENGTH - LOG_PREFIX_LENGTH) {
            return LOG_PREFIX + str.substring(0, MAX_LOG_TAG_LENGTH - LOG_PREFIX_LENGTH - 1);
        }

        return LOG_PREFIX + str;
    }

    /**
     * Don't use this when obfuscating class names!
     */
    public static String makeLogTag(Class cls) {
        return makeLogTag(cls.getSimpleName());
    }

    public static void v(String tag, Object... messages) {
        // Only log VERBOSE if build type is DEBUG
        if (DEBUG) {
            log(tag, Log.VERBOSE, null, messages);
        }
    }

    public static void d(String tag, Object... messages) {
        // Only log DEBUG if build type is DEBUG
        if (DEBUG) {
            log(tag, Log.DEBUG, null, messages);
        }
    }

    public static void i(String tag, Object... messages) {
        log(tag, Log.INFO, null, messages);
    }

    public static void w(String tag, Object... messages) {
        log(tag, Log.WARN, null, messages);
    }

    public static void w(String tag, Throwable t, Object... messages) {
        log(tag, Log.WARN, t, messages);
    }

    public static void e(String tag, Object... messages) {
        log(tag, Log.ERROR, null, messages);
    }

    public static void e(String tag, Throwable t, Object... messages) {
        log(tag, Log.ERROR, t, messages);
    }

    public static void log(String tag, int level, Throwable t, Object... messages) {
        String message;
        if (t == null && messages != null && messages.length == 1) {
            // handle this common case without the extra cost of creating a stringbuffer:
            message = messages[0].toString();
        } else {
            StringBuilder sb = new StringBuilder();
            if (messages != null)
                for (Object m : messages) {
                    sb.append(m);
                }
            if (t != null) {
                sb.append("\n").append(Log.getStackTraceString(t));
            }
            message = sb.toString();
        }
        Log.println(level, tag, message);
    }
}