net.sourceforge.javadpkg.io.impl.FileModeImpl Maven / Gradle / Ivy

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/*
 * dpkg - Debian Package library and the Debian Package Maven plugin
 * (c) Copyright 2016 Gerrit Hohl
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package net.sourceforge.javadpkg.io.impl;

import net.sourceforge.javadpkg.io.FileMode;

/**
 * 
 * A {@link FileMode} implementation.
 * 
 *
 * @author Gerrit Hohl ([email protected])
 * @version 1.0, 12.05.2016 by Gerrit Hohl
 */
public class FileModeImpl implements FileMode {
	
	
	/** The mode. */
	private int mode;
	
	
	/**
	 * 
	 * Creates the mode of a file.
	 * 
	 *
	 * @param mode
	 *            The mode: A number from octal 0000 (decimal: 0) to octal 7777
	 *            (decimal: 4095).
	 */
	public FileModeImpl(int mode) {
		super();

		if ((mode < 00000) || (mode > 07777))
			throw new IllegalArgumentException(
					"Argument mode is less than octal 000 (decimal: 0) or greater than octal 7777 (decimal: 4095): octal "
							+ Integer.toOctalString(mode) + " (decimal: " + mode + ")");
		
		this.mode = mode;
	}


	@Override
	public int getMode() {
		return this.mode;
	}


	@Override
	public String getOctal() {
		StringBuilder sb;
		
		
		sb = new StringBuilder();
		// --- Ignore sticky bit ---
		sb.append(Integer.toOctalString(this.mode & 0777));
		while (sb.length() < 3) {
			sb.insert(0, '0');
		}
		return sb.toString();
	}


	@Override
	public String getText() {
		StringBuilder sb;
		
		
		sb = new StringBuilder();
		// --- Ignore sticky bit ---
		this.addFlag(sb, 'r', this.isOwnerReadable());
		this.addFlag(sb, 'w', this.isOwnerWriteable());
		this.addFlag(sb, 'x', this.isOwnerExecutable());
		this.addFlag(sb, 'r', this.isGroupReadable());
		this.addFlag(sb, 'w', this.isGroupWriteable());
		this.addFlag(sb, 'x', this.isGroupExecutable());
		this.addFlag(sb, 'r', this.isOtherReadable());
		this.addFlag(sb, 'w', this.isOtherWriteable());
		this.addFlag(sb, 'x', this.isOtherExecutable());
		return sb.toString();
	}
	
	
	/**
	 * 
	 * Adds the flag.
	 * 
	 *
	 * @param sb
	 *            The {@link StringBuilder}. The flag will be added to it.
	 * @param flag
	 *            The flag: "r", "w" or "x".
	 * @param value
	 *            The value.
	 */
	private void addFlag(StringBuilder sb, char flag, boolean value) {
		if (value) {
			sb.append(flag);
		} else {
			sb.append('-');
		}
	}


	@Override
	public int getStickyBit() {
		return ((this.mode >> 9) & 00007);
	}


	@Override
	public boolean isOwnerReadable() {
		return ((this.mode & 00400) != 0);
	}


	@Override
	public boolean isOwnerWriteable() {
		return ((this.mode & 00200) != 0);
	}


	@Override
	public boolean isOwnerExecutable() {
		return ((this.mode & 00100) != 0);
	}


	@Override
	public boolean isGroupReadable() {
		return ((this.mode & 00040) != 0);
	}


	@Override
	public boolean isGroupWriteable() {
		return ((this.mode & 00020) != 0);
	}


	@Override
	public boolean isGroupExecutable() {
		return ((this.mode & 00010) != 0);
	}


	@Override
	public boolean isOtherReadable() {
		return ((this.mode & 00004) != 0);
	}


	@Override
	public boolean isOtherWriteable() {
		return ((this.mode & 00002) != 0);
	}


	@Override
	public boolean isOtherExecutable() {
		return ((this.mode & 00001) != 0);
	}


}