de.schlichtherle.truezip.sample.kernel.app.DriverMap Maven / Gradle / Ivy

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/*
 * Copyright (C) 2011 Schlichtherle IT Services
 *
 * 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.schlichtherle.truezip.sample.kernel.app;

import de.schlichtherle.truezip.fs.FsDriver;
import de.schlichtherle.truezip.fs.FsDriverProvider;
import de.schlichtherle.truezip.fs.FsScheme;
import de.schlichtherle.truezip.fs.sl.FsDriverLocator;
import de.schlichtherle.truezip.util.SuffixSet;
import edu.umd.cs.findbugs.annotations.DefaultAnnotation;
import edu.umd.cs.findbugs.annotations.NonNull;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.TreeMap;

/**
 * Pretty-prints an HTML table of the map of a file system driver provider.
 * 
 * @author Christian Schlichtherle
 * @version $Id$
 */
@DefaultAnnotation(NonNull.class)
public class DriverMap implements Runnable {

    private static final String TABLE_ATTRIBUTES = " border=\"2\" cellpadding=\"4\""; //"";
    private static final String BEGIN_CODE = ""; //"{@code "
    private static final String END_CODE   = ""; //"}"
    private static final String BEGIN_LINK = ""; //"{@link "
    private static final String END_LINK   = ""; //"}"

    private final PrintStream out;
    private final FsDriverProvider provider;

    public DriverMap(final PrintStream out, final FsDriverProvider provider) {
        if (null == out || null == provider)
            throw new NullPointerException();
        this.out = out;
        this.provider = provider;
    }

    public static void main(String[] args) throws Exception {
        final FsDriverProvider provider;
        provider = 0 == args.length
                ? FsDriverLocator.SINGLETON
                : (FsDriverProvider) Class.forName(args[0]).newInstance();
        new DriverMap(System.out, provider).run();
    }

    @Override
    public void run() {
        final Map map = provider.get();
        final Map compact = compact(map);
        out     .append("\n")
                .append("\n")
                .append("\n")
                .append("  \n")
                .append("    File System Driver Map\n")
                .append("  \n")
                .append("  \n")
                .append("    \n")
                .append("      File System Driver Provider Class ").append(BEGIN_LINK).append(provider.getClass().getName()).append(END_LINK).append("\n")
                .append("      \n")
                .append("        \n")
                .append("          URI Schemes\n")
                .append("          Archive File System?\n")
                .append("          File System Driver Class\n")
                .append("        \n")
                .append("      \n")
                .append("      \n");
        for (Entry entry : compact.entrySet()) {
            String clazz = entry.getKey();
            List set = new ArrayList(entry.getValue());
            String federated = Boolean.toString(
                    map .get(FsScheme.create(set.iterator().next()))
                        .isFederated());
            out .append("        \n")
                .append("          ");
            for (int i = 0; i < set.size(); i++) {
                if (0 < i)
                    out.append(", ");
                out.append(BEGIN_CODE).append(set.get(i)).append(END_CODE);
            }
            out .append("\n")
                .append("          ").append(BEGIN_CODE).append(federated).append(END_CODE).append("\n")
                .append("          ").append(BEGIN_LINK).append(clazz).append(END_LINK).append("\n")
                .append("        \n");
        }
        out     .append("      \n")
                .append("    \n")
                .append("  \n")
                .append("\n");
    }

    private static Map compact(
            final Map input) {
        final Map
                output = new TreeMap();
        for (final Entry entry : input.entrySet()) {
            final String scheme = entry.getKey().toString();
            final String clazz = entry.getValue().getClass().getName();
            SuffixSet suffixes = output.get(clazz);
            if (null == suffixes) {
                suffixes = new SuffixSet();
                output.put(clazz, suffixes);
            }
            suffixes.add(scheme);
        }
        return Collections.unmodifiableMap(output);
    }
}