de.viadee.maven.doxia.modules.textile.TextileParser.java Source code

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Here is the source code for de.viadee.maven.doxia.modules.textile.TextileParser.java

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/*
 * Project: doxia-module-textile
 * Package: org.apache.maven.doxia.module.textile
 * File   : TextileParser.java
 * Created: Jul 3, 2011 - 6:32:27 PM
 *
 *
 * Copyright 2011 viadee IT Unternehmensberatung GmbH
 *
 * 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 de.viadee.maven.doxia.modules.textile;

import java.io.IOException;
import java.io.LineNumberReader;
import java.io.Reader;
import java.io.StringReader;

import org.apache.maven.doxia.parser.AbstractTextParser;
import org.apache.maven.doxia.parser.ParseException;
import org.apache.maven.doxia.sink.Sink;
import org.eclipse.mylyn.wikitext.core.parser.MarkupParser;
import org.eclipse.mylyn.wikitext.textile.core.TextileLanguage;

import com.google.common.base.Preconditions;
import com.google.common.io.CharStreams;

/**
 * <p>
 * Doxia parser for Textile documents.
 * </p>
 * 
 * @author              Sebastian Ho (sebastian.hoss@viadee.de)
 * @since               1.0.0
 * @plexus.component    role="org.apache.maven.doxia.parser.Parser" role-hint="textile"
 */
public final class TextileParser extends AbstractTextParser {

    public static final String META_PREFIX = "==<!--";
    public static final String META_SUFFIX = "-->==";
    public static final String AUTHOR_ATTRIBUTE = "author:";
    public static final String TITLE_ATTRIBUTE = "title:";
    public static final String DATE_ATTRIBUTE = "date:";

    /**
     * Constructor for a new Doxia Textile parser.
     */
    public TextileParser() {
        // empty constructor to make Checkstyle happy.
    }

    /**
     * {@inheritDoc}
     */
    @SuppressWarnings("nls")
    @Override
    public void parse(final Reader reader, final Sink sink) throws ParseException {
        // Check Inputs
        Preconditions.checkNotNull(reader);
        Preconditions.checkNotNull(sink);

        this.getLog().info("Parsing Textile document..");

        // Read content of given markup
        String markupContent;

        try {
            markupContent = CharStreams.toString(reader);
            this.getLog().info("Textile content is: \n" + markupContent);
        } catch (final IOException exception) {
            throw new ParseException("Cannot read input", exception);
        }

        // Parse given markup to HTML
        if (markupContent != null && !markupContent.isEmpty()) {
            final MarkupParser markupParser = new MarkupParser();
            markupParser.setMarkupLanguage(new TextileLanguage());

            final String html = markupParser.parseToHtml(markupContent);
            this.getLog().info("HTML content is: \n" + html);

            try {
                LineNumberReader lnr = new LineNumberReader(new StringReader(markupContent));
                String line = null;

                sink.head();
                while ((line = lnr.readLine()) != null) {
                    if (line.startsWith(META_PREFIX) && line.endsWith(META_SUFFIX)) {

                        String inBetween = line.substring(META_PREFIX.length(),
                                line.length() - META_SUFFIX.length());

                        if (inBetween.toLowerCase().startsWith(AUTHOR_ATTRIBUTE)) {
                            sink.author();
                            sink.rawText(inBetween.substring(AUTHOR_ATTRIBUTE.length()));
                            sink.author_();
                        }

                        if (inBetween.toLowerCase().startsWith(TITLE_ATTRIBUTE)) {
                            System.out.println("set title to: " + inBetween.substring(TITLE_ATTRIBUTE.length()));
                            sink.title();
                            sink.rawText(inBetween.substring(TITLE_ATTRIBUTE.length()));
                            sink.title_();
                        }

                        if (inBetween.toLowerCase().startsWith(DATE_ATTRIBUTE)) {
                            sink.date();
                            sink.rawText(inBetween.substring(DATE_ATTRIBUTE.length()));
                            sink.date_();
                        }

                    }

                }
                sink.head_();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            sink.rawText(html);

            sink.flush();
        }

        // Finally close the sink.
        sink.close();
    }

}