/*
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* Copyright 2011 gitblit.com.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.gitblit.utils;
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import java.io.IOException;
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import java.io.Reader;
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import java.io.StringReader;
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import java.io.StringWriter;
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import org.slf4j.LoggerFactory;
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import org.tautua.markdownpapers.Markdown;
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import org.tautua.markdownpapers.parser.ParseException;
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/**
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* Utility methods for transforming raw markdown text to html.
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*
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* @author James Moger
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*
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*/
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public class MarkdownUtils {
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/**
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* Returns the html version of the markdown source text.
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*
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* @param markdown
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* @return html version of markdown text
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* @throws java.text.ParseException
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*/
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public static String transformMarkdown(String markdown) throws java.text.ParseException {
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try {
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StringReader reader = new StringReader(markdown);
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String html = transformMarkdown(reader);
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reader.close();
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return html;
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} catch (IllegalArgumentException e) {
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throw new java.text.ParseException(e.getMessage(), 0);
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} catch (NullPointerException p) {
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throw new java.text.ParseException("Markdown string is null!", 0);
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}
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}
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/**
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* Returns the html version of the markdown source reader. The reader is
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* closed regardless of success or failure.
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*
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* @param markdownReader
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* @return html version of the markdown text
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* @throws java.text.ParseException
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*/
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public static String transformMarkdown(Reader markdownReader) throws java.text.ParseException {
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// Read raw markdown content and transform it to html
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StringWriter writer = new StringWriter();
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try {
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Markdown md = new Markdown();
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md.transform(markdownReader, writer);
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return writer.toString().trim();
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} catch (StringIndexOutOfBoundsException e) {
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LoggerFactory.getLogger(MarkdownUtils.class).error("MarkdownPapers failed to parse Markdown!", e);
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throw new java.text.ParseException(e.getMessage(), 0);
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} catch (ParseException p) {
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LoggerFactory.getLogger(MarkdownUtils.class).error("MarkdownPapers failed to parse Markdown!", p);
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throw new java.text.ParseException(p.getMessage(), 0);
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} catch (Exception e) {
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LoggerFactory.getLogger(MarkdownUtils.class).error("MarkdownPapers failed to parse Markdown!", e);
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throw new java.text.ParseException(e.getMessage(), 0);
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} finally {
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try {
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writer.close();
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} catch (IOException e) {
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// IGNORE
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}
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}
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}
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}
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