org.radeox.macro.book.TextFileUrlMapper.java Source code

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Here is the source code for org.radeox.macro.book.TextFileUrlMapper.java

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/*
 * This file is part of "SnipSnap Radeox Rendering Engine".
 *
 * Copyright (c) 2002 Stephan J. Schmidt, Matthias L. Jugel
 * All Rights Reserved.
 *
 * Please visit http://radeox.org/ for updates and contact.
 *
 * --LICENSE NOTICE--
 * 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.
 * --LICENSE NOTICE--
 */

package org.radeox.macro.book;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Writer;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.radeox.Messages;
import org.radeox.util.Encoder;

/**
 * Manages links to keys, mapping is read from a text file
 * 
 * @author Stephan J. Schmidt
 * @version $Id: TextFileUrlMapper.java 7707 2006-04-12 17:30:19Z
 *          ian@caret.cam.ac.uk $
 */

public abstract class TextFileUrlMapper implements UrlMapper {
    private static Log log = LogFactory.getLog(TextFileUrlMapper.class);

    private Map services;

    public abstract String getFileName();

    public abstract String getKeyName();

    public TextFileUrlMapper(Class klass) {
        services = new HashMap();

        boolean fileNotFound = false;
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(getFileName())));
            addMapping(br);
        } catch (IOException e) {
            log.warn("Unable to read " + getFileName()); //$NON-NLS-1$
            fileNotFound = true;
        }

        if (fileNotFound) {
            BufferedReader br = null;
            try {
                br = new BufferedReader(new InputStreamReader(klass.getResourceAsStream("/" + getFileName()))); //$NON-NLS-1$
                addMapping(br);
            } catch (Exception e) {
                log.warn("Unable to read /" + getFileName() + " from jar"); //$NON-NLS-1$ //$NON-NLS-2$
            }
        }
    }

    public void addMapping(BufferedReader reader) throws IOException {
        String line;
        while ((line = reader.readLine()) != null) {
            if (!line.startsWith("#")) //$NON-NLS-1$
            {
                int index = line.indexOf(" "); //$NON-NLS-1$
                services.put(line.substring(0, index), Encoder.escape(line.substring(index + 1)));
            }
        }
    }

    public Writer appendTo(Writer writer) throws IOException {
        Iterator iterator = services.entrySet().iterator();
        writer.write("{table}\n"); //$NON-NLS-1$
        writer.write(Messages.getString("TextFileUrlMapper.7")); //$NON-NLS-1$
        while (iterator.hasNext()) {
            Map.Entry entry = (Map.Entry) iterator.next();
            writer.write((String) entry.getKey());
            writer.write("|"); //$NON-NLS-1$
            writer.write((String) entry.getValue());
            writer.write("\n"); //$NON-NLS-1$
        }
        writer.write("{table}"); //$NON-NLS-1$
        return writer;
    }

    public boolean contains(String external) {
        return services.containsKey(external);
    }

    public Writer appendUrl(Writer writer, String key) throws IOException {
        if (services.size() == 0) {
            writer.write(getKeyName());
            writer.write(":"); //$NON-NLS-1$
            writer.write(key);
        } else {
            // SnipLink.appendImage(writer, "external-link", ">>");
            writer.write("("); //$NON-NLS-1$
            Iterator iterator = services.entrySet().iterator();
            while (iterator.hasNext()) {
                Map.Entry entry = (Map.Entry) iterator.next();
                writer.write("<a href=\""); //$NON-NLS-1$
                writer.write((String) entry.getValue());
                writer.write(key);
                writer.write("\">"); //$NON-NLS-1$
                writer.write((String) entry.getKey());
                writer.write("</a>"); //$NON-NLS-1$
                if (iterator.hasNext()) {
                    writer.write(" &#x7c; "); //$NON-NLS-1$
                }
            }
            writer.write(")"); //$NON-NLS-1$
        }
        return writer;
    }
}