/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

#ifndef _LOG4CXX_HELPERS_DATE_FORMAT_H
#define _LOG4CXX_HELPERS_DATE_FORMAT_H

#include <log4cxx/helpers/timezone.h>


namespace log4cxx
{
namespace helpers
{

/**
*  DateFormat is an abstract class for date/time formatting
* patterned after java.text.DateFormat.
*/
class LOG4CXX_EXPORT DateFormat : public ObjectImpl
{
	public:
		DECLARE_ABSTRACT_LOG4CXX_OBJECT(DateFormat)
		BEGIN_LOG4CXX_CAST_MAP()
		LOG4CXX_CAST_ENTRY(DateFormat)
		END_LOG4CXX_CAST_MAP()

		/**
		*  Destructor
		*/
		virtual ~DateFormat();

		/**
		* Formats an log4cxx_time_t into a date/time string.
		* @param s string to which the date/time string is appended.
		* @param tm date to be formatted.
		* @param p memory pool used during formatting.
		*/
		virtual void format(LogString& s, log4cxx_time_t tm, log4cxx::helpers::Pool& p) const = 0;

		/**
		* Sets the time zone.
		* @param zone the given new time zone.
		*/
		virtual void setTimeZone(const TimeZonePtr& zone);

		/**
		* Format an integer consistent with the format method.
		* @param s string to which the numeric string is appended.
		* @param n integer value.
		* @param p memory pool used during formatting.
		* @remarks This method is used by CachedDateFormat to
		* format the milliseconds.
		*/
		virtual void numberFormat(LogString& s, int n, log4cxx::helpers::Pool& p) const;


	protected:
		/**
		* Constructor.
		*/
		DateFormat();

	private:
		/**
		*  Copy constructor definition to prevent copying.
		*/
		DateFormat(const DateFormat&);
		/**
		*  Assignment definition to prevent assignment.
		*/
		DateFormat& operator=(const DateFormat&);
};
LOG4CXX_PTR_DEF(DateFormat);


}  // namespace helpers
} // namespace log4cxx

#endif //_LOG4CXX_HELPERS_DATE_FORMAT_H