/*

     dsh-timer  Timer with nanosecond resolution and summary statistics

     on recorded elapsed times.

     Copyright (c) 2004-2013 held jointly by the individual authors.

     This library is free software; you can redistribute it and/or modify it

     under the terms of the GNU Lesser General Public License as published

     by the Free Software Foundation; either version 3 of the License, or (at

     your option) any later version.

     This library is distributed in the hope that it will be useful, but WITHOUT

     ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or

     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public

     License for more details.

     You should have received a copy of the GNU Lesser General Public License

     along with this library;  if not, write to the Free Software Foundation,

     Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA.

     > http://www.fsf.org/licensing/licenses/lgpl.html

     > http://www.opensource.org/licenses/lgpl-license.php

 */

 package org.dishevelled.timer.report;

 import java.io.IOException;

 import java.text.NumberFormat;

 import java.util.Map;

 import org.dishevelled.timer.Timer;

 /**

  * Timer report in tab-delimited text format.

  */

 public final class TextTimerReport

     extends AbstractTimerReport

 {

     private final NumberFormat numberFormat;

     public TextTimerReport(final NumberFormat numberFormat)

     {

         this.numberFormat = numberFormat;

     }

     /** {@inheritDoc} */

     public <T extends Appendable> T append(final Map<? extends Runnable, Timer> timers, final T appendable)

         throws IOException

     {

         if (timers == null)

         {

             throw new IllegalArgumentException("timers must not be null");

         }

         if (appendable == null)

         {

             throw new IllegalArgumentException("appendable must not be null");

         }

         append(appendable, "Runnable");

         append(appendable, "Size");

         append(appendable, "Min (ns)");

         append(appendable, "Mean (ns)");

         append(appendable, "Max (ns)");

         append(appendable, "Standard Deviation (ns)");

         appendLast(appendable, "Sum (ns)");

         for (Map.Entry<? extends Runnable, Timer> entry : timers.entrySet())

         {

             append(appendable, String.valueOf(entry.getKey()));

             append(appendable, numberFormat.format(entry.getValue().size()));

             append(appendable, numberFormat.format(entry.getValue().min()));

             append(appendable, numberFormat.format(entry.getValue().mean()));

             append(appendable, numberFormat.format(entry.getValue().max()));

             append(appendable, numberFormat.format(entry.getValue().standardDeviation()));

             appendLast(appendable, numberFormat.format(entry.getValue().sum()));

         }

         return appendable;

     }

     private static <T extends Appendable> void append(final T appendable, final String value) throws IOException

     {

         appendable.append(value);

         appendable.append("\t");

     }

     private static <T extends Appendable> void appendLast(final T appendable, final String value) throws IOException

     {

         appendable.append(value);

         appendable.append("\n");

     }

 }