org.springframework.security.acls.model.Permission.java Source code

Introduction

Here is the source code for org.springframework.security.acls.model.Permission.java

Source

/*
 * Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.security.acls.model;

import java.io.Serializable;

/**
 * Represents a permission granted to a <tt>Sid</tt> for a given domain object.
 *
 * @author Ben Alex
 */
public interface Permission extends Serializable {
    // ~ Static fields/initializers
    // =====================================================================================

    char RESERVED_ON = '~';
    char RESERVED_OFF = '.';
    String THIRTY_TWO_RESERVED_OFF = "................................";

    // ~ Methods
    // ========================================================================================================

    /**
     * Returns the bits that represents the permission.
     *
     * @return the bits that represent the permission
     */
    int getMask();

    /**
     * Returns a 32-character long bit pattern <code>String</code> representing this
     * permission.
     * <p>
     * Implementations are free to format the pattern as they see fit, although under no
     * circumstances may {@link #RESERVED_OFF} or {@link #RESERVED_ON} be used within the
     * pattern. An exemption is in the case of {@link #RESERVED_OFF} which is used to
     * denote a bit that is off (clear). Implementations may also elect to use
     * {@link #RESERVED_ON} internally for computation purposes, although this method may
     * not return any <code>String</code> containing {@link #RESERVED_ON}.
     * <p>
     * The returned String must be 32 characters in length.
     * <p>
     * This method is only used for user interface and logging purposes. It is not used in
     * any permission calculations. Therefore, duplication of characters within the output
     * is permitted.
     *
     * @return a 32-character bit pattern
     */
    String getPattern();
}