
/*
 * Janino - An embedded Java[TM] compiler
 *
 * Copyright (c) 2001-2010, Arno Unkrig
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
 * following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of conditions and the
 *       following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
 *       following disclaimer in the documentation and/or other materials provided with the distribution.
 *    3. The name of the author may not be used to endorse or promote products derived from this software without
 *       specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package org.codehaus.janino.util.resource;

import java.io.*;
import java.util.zip.*;

/**
 * A {@link org.codehaus.janino.util.resource.ResourceFinder} that finds resources in a ZIP file.
 */
public
class ZipFileResourceFinder extends ResourceFinder {
    private final ZipFile zipFile;

    public
    ZipFileResourceFinder(ZipFile zipFile) {
        this.zipFile = zipFile;
    }

    @Override public final String toString() { return "zip:" + this.zipFile.getName(); }

    // Implement ResourceFinder.

    @Override public final Resource
    findResource(final String resourceName) {
        final ZipEntry ze = this.zipFile.getEntry(resourceName);
        if (ze == null) return null;
        return new Resource() {

            @Override public InputStream
            open() throws IOException {
                return ZipFileResourceFinder.this.zipFile.getInputStream(ze);
            }

            @Override public String
            getFileName() {
                return ZipFileResourceFinder.this.zipFile.getName() + ':' + resourceName;
            }

            @Override public long
            lastModified() { long l = ze.getTime(); return l == -1L ? 0L : l; }

            @Override public String
            toString() { return this.getFileName(); }
        };
    }
}
