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/*
* Copyright (C) 2012 The CyanogenMod Project
*
* 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
*
* http://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 com.cyanogenmod.filemanager.model;
import java.io.Serializable;
/**
* A class for represents permissions.<br/>
* <br/>
* Actual permissions refers to Unix permissions:
* <ul>
* <li>read</li>
* <li>write</li>
* <li>execute</li>
* </ul>
*/
public abstract class Permission implements Serializable {
private static final long serialVersionUID = 5775987092282897912L;
/**
* @hide
*/
public static final char UNASIGNED = '-';
/**
* @hide
*/
public static final char READ = 'r';
/**
* @hide
*/
public static final char WRITE = 'w';
/**
* @hide
*/
public static final char EXECUTE = 'x';
private boolean mRead;
private boolean mWrite;
private boolean mExecute;
private String mRawString;
/**
* Constructor of <code>Permission</code>.
*
* @param read If the object can be read
* @param write If the object can be written
* @param execute If the object can be executed
*/
public Permission(boolean read, boolean write, boolean execute) {
super();
this.mRead = read;
this.mWrite = write;
this.mExecute = execute;
}
/**
* Method that returns if the object can be read.
*
* @return boolean If the object can be read
*/
public boolean isRead() {
return this.mRead;
}
/**
* Method that sets if the object can be read.
*
* @param read If the object can be read
*/
public void setRead(boolean read) {
this.mRead = read;
invalidateRawString();
}
/**
* Method that returns if the object can be written.
*
* @return boolean If the object can be written
*/
public boolean isWrite() {
return this.mWrite;
}
/**
* Method that sets if the object can be written.
*
* @param write If the object can be written
*/
public void setWrite(boolean write) {
this.mWrite = write;
invalidateRawString();
}
/**
* Method that returns if the object can be executed.
*
* @return boolean If the object can be executed
*/
public boolean isExecute() {
return this.mExecute;
}
/**
* Method that sets if the object can be executed.
*
* @param execute If the object can be executed
*/
public void setExecute(boolean execute) {
this.mExecute = execute;
invalidateRawString();
}
/**
* {@inheritDoc}
*/
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + (this.mExecute ? 1231 : 1237);
result = prime * result + (this.mRead ? 1231 : 1237);
result = prime * result + (this.mWrite ? 1231 : 1237);
return result;
}
/**
* {@inheritDoc}
*/
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
Permission other = (Permission) obj;
if (this.mExecute != other.mExecute) {
return false;
}
if (this.mRead != other.mRead) {
return false;
}
if (this.mWrite != other.mWrite) {
return false;
}
return true;
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
return "Permission [read=" + this.mRead + ", write=" + //$NON-NLS-1$ //$NON-NLS-2$
this.mWrite + ", execute=" + this.mExecute + "]"; //$NON-NLS-1$ //$NON-NLS-2$
}
/**
* Method that returns a string representation of the permissions
* conforming with the unix style (rwx).
*
* @return String The string representation of the permissions
*/
public String toRawString() {
if (mRawString == null) {
mRawString = getRawString();
}
return mRawString;
}
protected void invalidateRawString() {
mRawString = null;
}
protected abstract String getRawString();
}
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