com.github.stephenc.javaisotools.iso9660.LayoutHelper Maven / Gradle / Ivy

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/*
 * Copyright (c) 2010. Stephen Connolly.
 * Copyright (C) 2007. Jens Hatlak 
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

package com.github.stephenc.javaisotools.iso9660;

import com.github.stephenc.javaisotools.iso9660.impl.ISO9660Constants;
import com.github.stephenc.javaisotools.sabre.HandlerException;
import com.github.stephenc.javaisotools.sabre.StreamHandler;

public abstract class LayoutHelper {

    private StreamHandler streamHandler;
    private ISO9660RootDirectory root;
    private NamingConventions namingConventions;

    public LayoutHelper(StreamHandler streamHandler, ISO9660RootDirectory root, NamingConventions namingConventions) {
        this.streamHandler = streamHandler;
        this.root = root;
        this.namingConventions = namingConventions;
    }

    public ISO9660RootDirectory getRoot() {
        return root;
    }

    public int getCurrentLocation() throws HandlerException {
        long position = streamHandler.mark();
        int location = (int) (position / ISO9660Constants.LOGICAL_BLOCK_SIZE);
        return location;
    }

    public int getDifferenceTo(long position) throws HandlerException {
        return (int) ((streamHandler.mark() - position));
    }

    public NamingConventions getNamingConventions() {
        return namingConventions;
    }

    public abstract FilenameDataReference getFilenameDataReference(ISO9660Directory dir) throws HandlerException;

    public abstract FilenameDataReference getFilenameDataReference(ISO9660File file) throws HandlerException;

    public abstract byte[] pad(String string, int targetByteLength) throws HandlerException;
}