/******************************************************************************
 *
 * package:     Log4Qt
 * file:        properties.h
 * created:     September 
 * author:      Martin Heinrich
 *
 * 
 * Copyright 2007 Martin Heinrich
 * 
 * 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.
 * 
 ******************************************************************************/

#ifndef LOG4QT_PROPERTIES_H
#define LOG4QT_PROPERTIES_H


/******************************************************************************
 * Dependencies
 ******************************************************************************/

#include <QtCore/QHash>
#include <QtCore/QStringList>


/******************************************************************************
 * Declarations
 ******************************************************************************/

class QIODevice;
class QSettings;


namespace Log4Qt
{
	/*!
	 * \brief The class Properties implements a JAVA property hash.
	 */
	class Properties : public QHash<QString, QString>
	{
	public:
		Properties(Properties *pDefaultProperties = 0);
		// virtual ~Properties(); // Use compiler default
		// Properties(const Properties &rOther); // Use compiler default
		// Properties &operator=(const Properties &rOther); // Not implemented
	
	public:
		Properties *defaultProperties() const;
		QString property(const QString &rKey) const; 
		QString property(const QString &rKey, 
		                 const QString &rDefaultValue) const; 
		void setDefaultProperties(Properties *pDefault);
		void setProperty(const QString &rKey,
		                 const QString &rValue);
		
		// JAVA: void list(QTextStream &rTextStream); 
        void load(QIODevice *pDevice);
        
        /*!
         * Reads all child keys from the QSettings object \a rSettings and 
         * inserts them into this object. The value is created using 
         * QVariant::toString(). Types that do not support toString() are 
         * resulting in an empty string.
         * 
         * \code
         * QSettings settings;
         * settings.setValue("Package", "Full");
         * settings.setValue("Background", Qt::white);
         * settings.setValue("Support", true);
         * settings.setValue("Help/Language", "en_UK");
         * 
         * Properties properties
         * properties.load(&settings)
         * 
         * // properties (("Package", "Full"), ("Background", ""), ("Support", "true"))
         * \endcode
         */
        void load(const QSettings &rSettings);
        
		QStringList propertyNames() const;
        // JAVA: void save(QIODevice *pDevice) const;
		
	private:
		void parseProperty(const QString &rProperty, 
		                   int line);
		static int hexDigitValue(const QChar &rDigit);
		static QString trimLeft(const QString &rString);
	
	private:
		Properties *mpDefaultProperties;
		static const char msEscapeChar;
		static const char *msValueEscapeCodes;
		static const char *msValueEscapeChars;
		static const char *msKeyEscapeCodes;
		static const char *msKeyEscapeChars;
	};
	
	
	/**************************************************************************
	 * Operators, Helper
	 **************************************************************************/
	
#ifndef QT_NO_DEBUG_STREAM
	/*!
	 * \relates Properties
	 * 
	 * Writes all object member variables to the given debug stream \a rDebug and
	 * returns the stream.
	 *
	 * <tt>
	 * %Properties(default:0x0 properties:QHash(("log4j.appender.testAppender.layout", "org.apache.log4j.PatternLayout ")
	 *             ("log4j.appender.testAppender.layout.ConversionPattern", "[%t] %-5p %l: %m%n")
	 *             ("log4j.appender.testAppender.Append", "false ")
	 *             ("log4j.appender.testAppender.File", "output/temp ")
	 *             ("log4j.rootCategory", "TRACE, testAppender")
	 *             ("log4j.appender.testAppender", "org.apache.log4j.FileAppender")) )  
	 * </tt>
	 * \sa QDebug
	 */
	QDebug operator<<(QDebug debug, 
                      const Properties &rProperties);
#endif // QT_NO_DEBUG_STREAM
	
	
	/**************************************************************************
	 * Inline
	 **************************************************************************/

	inline Properties::Properties(Properties *pDefaultProperties) :
		mpDefaultProperties(pDefaultProperties)
	{}
	
	inline Properties *Properties::defaultProperties() const
	{	return mpDefaultProperties;	}
	
	inline void Properties::setDefaultProperties(Properties *pDefaultProperties)
	{	mpDefaultProperties = pDefaultProperties;	}
	
	inline void Properties::setProperty(const QString &rKey, 
	                                    const QString &rValue)
	{   insert(rKey, rValue);	}
	
	
} // namespace Log4Qt


Q_DECLARE_TYPEINFO(Log4Qt::Properties, Q_MOVABLE_TYPE);


#endif // LOG4QT_PROPERTIES_H