JarFileSystemProvider.java

/*
 * Copyright (c) 2007, 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package jdk.nio.zipfs;

import java.nio.file.*;
import java.nio.file.spi.*;
import java.nio.file.attribute.*;
import java.nio.file.spi.FileSystemProvider;

import java.net.URI;
import java.io.IOException;
import java.net.URISyntaxException;
import java.nio.channels.FileChannel;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

class JarFileSystemProvider extends ZipFileSystemProvider
{

    @Override
    public String getScheme() {
        return "jar";
    }

    @Override
    protected Path uriToPath(URI uri) {
        String scheme = uri.getScheme();
        if ((scheme == null) || !scheme.equalsIgnoreCase(getScheme())) {
            throw new IllegalArgumentException("URI scheme is not '" + getScheme() + "'");
        }
        try {
            String uristr = uri.toString();
            int end = uristr.indexOf("!/");
            uristr = uristr.substring(4, (end == -1) ? uristr.length() : end);
            uri = new URI(uristr);
            return Paths.get(new URI("file", uri.getHost(), uri.getPath(), null))
                        .toAbsolutePath();
        } catch (URISyntaxException e) {
            throw new AssertionError(e); //never thrown
        }
    }

    @Override
    public Path getPath(URI uri) {
        FileSystem fs = getFileSystem(uri);
        String path = uri.getFragment();
        if (path == null) {
            String uristr = uri.toString();
            int off = uristr.indexOf("!/");
            if (off != -1)
                path = uristr.substring(off + 2);
        }
        if (path != null)
            return fs.getPath(path);
        throw new IllegalArgumentException("URI: "
            + uri
            + " does not contain path fragment ex. jar:///c:/foo.zip!/BAR");
    }
}