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/*
* Copyright 2011 gitblit.com.
*
* 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.
*/
package com.gitblit.utils;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import org.slf4j.LoggerFactory;
import org.tautua.markdownpapers.Markdown;
import org.tautua.markdownpapers.parser.ParseException;
/**
* Utility methods for transforming raw markdown text to html.
*
* @author James Moger
*
*/
public class MarkdownUtils {
/**
* Returns the html version of the markdown source text.
*
* @param markdown
* @return html version of markdown text
* @throws java.text.ParseException
*/
public static String transformMarkdown(String markdown) throws java.text.ParseException {
try {
StringReader reader = new StringReader(markdown);
String html = transformMarkdown(reader);
reader.close();
return html;
} catch (IllegalArgumentException e) {
throw new java.text.ParseException(e.getMessage(), 0);
} catch (NullPointerException p) {
throw new java.text.ParseException("Markdown string is null!", 0);
}
}
/**
* Returns the html version of the markdown source reader. The reader is
* closed regardless of success or failure.
*
* @param markdownReader
* @return html version of the markdown text
* @throws java.text.ParseException
*/
public static String transformMarkdown(Reader markdownReader) throws java.text.ParseException {
// Read raw markdown content and transform it to html
StringWriter writer = new StringWriter();
try {
Markdown md = new Markdown();
md.transform(markdownReader, writer);
return writer.toString().trim();
} catch (StringIndexOutOfBoundsException e) {
LoggerFactory.getLogger(MarkdownUtils.class).error("MarkdownPapers failed to parse Markdown!", e);
throw new java.text.ParseException(e.getMessage(), 0);
} catch (ParseException p) {
LoggerFactory.getLogger(MarkdownUtils.class).error("MarkdownPapers failed to parse Markdown!", p);
throw new java.text.ParseException(p.getMessage(), 0);
} catch (Exception e) {
LoggerFactory.getLogger(MarkdownUtils.class).error("MarkdownPapers failed to parse Markdown!", e);
throw new java.text.ParseException(e.getMessage(), 0);
} finally {
try {
writer.close();
} catch (IOException e) {
// IGNORE
}
}
}
}
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