Merge "Conduct non-functional refactoring for EventLogger"

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.LinkedList;

import java.util.Locale;

/**

 * Logs human-readable events for debugging purposes.

 */

public class EventLogger {

    // ring buffer of events to log.

    private final LinkedList<Event> mEvents;

    /** Identifies the source of events. */

    private final String mTag;

    private final String mTitle;

    /** Stores the events using a ring buffer. */

    private final LinkedList<Event> mEvents;

    // the maximum number of events to keep in log

    /**

     * The maximum number of events to keep in {@code mEvents}.

     *

     * <p>Calling {@link #log} when the size of {@link #mEvents} matches the threshold will

     * cause the oldest event to be evicted.

     */

    private final int mMemSize;

    public static abstract class Event {

        // formatter for timestamps

        private final static SimpleDateFormat sFormat = new SimpleDateFormat("MM-dd HH:mm:ss:SSS");

    public abstract static class Event {

        /** Timestamps formatter. */

        private static final SimpleDateFormat sFormat =

                new SimpleDateFormat("MM-dd HH:mm:ss:SSS", Locale.US);

        private final long mTimestamp;

         * Timestamp information will be automatically added, do not include it.

         * @return a string representation of the event that occurred.

         */

        abstract public String eventToString();

        public abstract String eventToString();

    }

    public static class StringEvent extends Event {

    /**

     * Constructor for logger.

     * @param size the maximum number of events to keep in log

     * @param title the string displayed before the recorded log

     * @param tag the string displayed before the recorded log

     */

    public EventLogger(int size, String title) {

    public EventLogger(int size, String tag) {

        mEvents = new LinkedList<Event>();

        mMemSize = size;

        mTitle = title;

        mTag = tag;

    }

    public synchronized void log(Event evt) {

    }

    public synchronized void dump(PrintWriter pw) {

        pw.println("Audio event log: " + mTitle);

        pw.println("Events log: " + mTag);

        for (Event evt : mEvents) {

            pw.println(evt.toString());

        }