001/*
002    Licensed to the Apache Software Foundation (ASF) under one
003    or more contributor license agreements.  See the NOTICE file
004    distributed with this work for additional information
005    regarding copyright ownership.  The ASF licenses this file
006    to you under the Apache License, Version 2.0 (the
007    "License"); you may not use this file except in compliance
008    with the License.  You may obtain a copy of the License at
009
010       http://www.apache.org/licenses/LICENSE-2.0
011
012    Unless required by applicable law or agreed to in writing,
013    software distributed under the License is distributed on an
014    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015    KIND, either express or implied.  See the License for the
016    specific language governing permissions and limitations
017    under the License.
018 */
019package org.apache.wiki.htmltowiki.syntax;
020
021import org.apache.wiki.htmltowiki.XHtmlElementToWikiTranslator;
022import org.jdom2.Element;
023import org.jdom2.JDOMException;
024
025import java.io.PrintWriter;
026
027
028/**
029 * Translates to wiki syntax from a {@code P} element.
030 */
031public abstract class PDecorator {
032
033    final protected PrintWriter out;
034    final protected XHtmlElementToWikiTranslator chain;
035
036    protected PDecorator( final PrintWriter out, final XHtmlElementToWikiTranslator chain ) {
037        this.out = out;
038        this.chain = chain;
039    }
040
041    /**
042     * Translates the given XHTML element into wiki markup.
043     *
044     * @param e XHTML element being translated.
045     */
046    public void decorate( final Element e ) throws JDOMException {
047        if ( e.getContentSize() != 0 ) { // we don't want to print empty elements: <p></p>
048            out.print( markupPOpen() );
049            chain.translate( e );
050            out.print( markupPClose() );
051        }
052    }
053
054    /**
055     * Opening wiki markup for a {@code P} element.
056     *
057     * @return Opening wiki markup for a {@code P} element.
058     */
059    protected abstract String markupPOpen();
060
061    /**
062     * Closing wiki markup for a {@code P} element.
063     *
064     * @return Closing wiki markup for a {@code P} element.
065     */
066    protected abstract String markupPClose();
067
068}