propertysetter.h

功能非常强的写日志程序

/*
 * Copyright 2003,2004 The Apache Software Foundation.
 * 
 * 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 _LOG4CXX_CONFIG_PROPERTYSETTER_H
#define _LOG4CXX_CONFIG_PROPERTYSETTER_H

#include <log4cxx/helpers/tchar.h>
#include <log4cxx/helpers/objectptr.h>

namespace log4cxx
{
	namespace helpers
	{
		class Object;
		typedef ObjectPtrT<Object> ObjectPtr;

		class Properties;
	} 

	namespace config
	{
/**
General purpose Object property setter. Clients repeatedly invokes
{@link #setProperty setProperty(name,value)} in order to invoke setters
on the Object specified in the constructor.

<p>Usage:
<pre>
PropertySetter ps(anObject);
ps.set("name", "Joe");
ps.set("age", "32");
ps.set("isMale", "true");
</pre>
will cause the invocations anObject->setOption("name", "Joe"), 
anObject->setOption("age", "32") and anObject->setOption("isMale", "true")
if the spi::OptionHandler interface is supported by anObject.
*/
		class LOG4CXX_EXPORT PropertySetter
		{
		protected: 
			helpers::ObjectPtr obj;
			
		public:
/**
Create a new PropertySetter for the specified Object. This is done
in prepartion for invoking #setProperty one or more times.

@param obj  the object for which to set properties
*/
			PropertySetter(helpers::ObjectPtr obj);
			
/**
Set the properties of an object passed as a parameter in one
go. The <code>properties</code> are parsed relative to a
<code>prefix</code>.

@param obj The object to configure.
@param properties A java.util.Properties containing keys and values.
@param prefix Only keys having the specified prefix will be set.
*/
			static void setProperties(helpers::ObjectPtr obj, 
				helpers::Properties& properties, const String& prefix);
			
/**
Set the properites for the object that match the
<code>prefix</code> passed as parameter.
*/
			void setProperties(helpers::Properties& properties, const String& prefix);
			
/**
Set a property on this PropertySetter's Object. If the underlying
Object supports the spi::OptionHandler interface, the 
{@link spi::OptionHandler#setOption setOption} method is called.

@param name    name of the property
@param value   String value of the property
*/
			void setProperty(const String& name, const String& value);

			void activate();
		}; // class PropertySetter
	}  // namespace config;
}; // namespace log4cxx

#endif //_LOG4CXX_CONFIG_PROPERTYSETTER_H