/**
* This file is part of muCommander, http://www.mucommander.com
* Copyright (C) 2002-2016 Maxence Bernard
*
* muCommander 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 3 of the License, or
* (at your option) any later version.
*
* muCommander 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 program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.mucommander.commons.file;
/**
* GroupedPermissionBits is an implementation of {@link com.mucommander.commons.file.PermissionBits} using a given UNIX-style
* permission int: {@link #getIntValue()} returns the specified int, and {@link #getBitValue(int, int)} isolates a
* specified value.
*
* @see com.mucommander.commons.file.IndividualPermissionBits
* @author Maxence Bernard
*/
public class GroupedPermissionBits implements PermissionBits {
/** UNIX-style permission int */
protected int permissions;
/**
* Creates a new GroupedPermissionBits using the specified UNIX-style permission int. The int can be created
* by combining (binary OR and shift) values defined in {@link com.mucommander.commons.file.PermissionTypes} and
* {@link com.mucommander.commons.file.PermissionAccess}.
*
* @param permissions a UNIX-style permission int.
*/
public GroupedPermissionBits(int permissions) {
this.permissions = permissions;
}
///////////////////////////////////
// PermissionBits implementation //
///////////////////////////////////
public int getIntValue() {
return permissions;
}
public boolean getBitValue(PermissionAccess access, PermissionType type) {
return (permissions & (type.toInt() << (access.toInt()*3))) != 0;
}
}