denyallfilter.h

来自「功能非常强的写日志程序」· C头文件 代码 · 共 59 行

/*
 * 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_VARIA_DENY_ALL_FILTER_H
#define _LOG4CXX_VARIA_DENY_ALL_FILTER_H

#include <log4cxx/spi/filter.h>

namespace log4cxx
{
	namespace varia
	{
		/**
		This filter drops all logging events.
		<p>You can add this filter to the end of a filter chain to
		switch from the default "accept all unless instructed otherwise"
		filtering behaviour to a "deny all unless instructed otherwise"
		behaviour.
		*/
		class DenyAllFilter;
		typedef helpers::ObjectPtrT<DenyAllFilter> DenyAllFilterPtr;

		class LOG4CXX_EXPORT DenyAllFilter : public spi::Filter
		{
		public:
			typedef spi::Filter BASE_CLASS;
			DECLARE_LOG4CXX_OBJECT(DenyAllFilter)
			BEGIN_LOG4CXX_CAST_MAP()
				LOG4CXX_CAST_ENTRY(DenyAllFilter)
				LOG4CXX_CAST_ENTRY_CHAIN(BASE_CLASS)
			END_LOG4CXX_CAST_MAP()

			/**
			Always returns the integer constant {@link spi::Filter#DENY DENY}
			regardless of the {@link spi::LoggingEvent LoggingEvent} parameter.
			@param event The LoggingEvent to filter.
			@return Always returns {@link spi::Filter#DENY DENY}.
			*/
			FilterDecision decide(const spi::LoggingEventPtr& event) const
				{ return spi::Filter::DENY; }
		}; // class DenyAllFilter
	}  // namespace varia
}; // namespace log4cxx

#endif // _LOG4CXX_VARIA_DENY_ALL_FILTER_H