/*
 * 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_TRANSFORM_H
#define _LOG4CXX_HELPERS_TRANSFORM_H

#include <log4cxx/logstring.h>

namespace log4cxx
{
namespace helpers
{
/**
Utility class for transforming strings.
*/
class LOG4CXX_EXPORT Transform
{
    public:
        /**
        * This method takes a string which may contain HTML tags (ie,
        * &lt;b&gt;, &lt;table&gt;, etc) and replaces any '<' and '>'
        * characters with respective predefined entity references.
        *
        * @param buf output stream where to write the modified string.
        * @param input The text to be converted.
        * @return The input string with the characters '<' and '>' replaced with
        *  &amp;lt; and &amp;gt; respectively.
        * */
        static void appendEscapingTags(
            LogString& buf, const LogString& input);

        /**
        * Ensures that embeded CDEnd strings (]]>) are handled properly
        * within message, NDC and throwable tag text.
        *
        * @param buf output stream holding the XML data to this point.  The
        * initial CDStart (<![CDATA[) and final CDEnd (]]>) of the CDATA
        * section are the responsibility of the calling method.
        * @param input The String that is inserted into an existing CDATA
        * Section within buf.
        */
        static void appendEscapingCDATA(
            LogString& buf, const LogString& input);
}; // class Transform
}  // namespace helpers
} //namespace log4cxx

#endif // _LOG4CXX_HELPERS_TRANSFORM_H