Permission.java
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/*
* This file is part of LiteLoader.
* Copyright (C) 2012-16 Adam Mummery-Smith
* All Rights Reserved.
*/
package com.mumfrey.liteloader.permissions;
import java.util.Hashtable;
import java.util.Map;
/**
* Class which represents a permission node
*
* @author Adam Mummery-Smith
*/
public class Permission
{
/**
* True if this node is the root of the permission tree
*/
private final boolean isRootNode;
/**
* True if this node is a wildcard node (can match any query)
*/
private final boolean isWildcardNode;
/**
* Node name
*/
private final String nodeName;
/**
* Nodes which are children of this node
*/
private final Map<String, Permission> childNodes = new Hashtable<String, Permission>();
/**
* Node value
*/
private boolean value;
/**
* Create a new root node
*/
public Permission()
{
this.isRootNode = true;
this.isWildcardNode = false;
this.value = true;
this.nodeName = "root";
}
/**
* Create a new child node with the specified name and value
*
* @param permissionName Name of the permission node
* @param value Initial value for the permission node
*/
public Permission(String permissionName, boolean value)
{
this.isRootNode = false;
this.isWildcardNode = "*".equals(permissionName);
this.value = value;
this.nodeName = permissionName;
}
/**
* Create a new child node with the specified name
*
* @param permissionName Name of the permission node
*/
public Permission(String permissionName)
{
this(permissionName, true);
}
/**
* Get whether this node is a root node (read only)
*/
public boolean isRoot()
{
return this.isRootNode;
}
/**
* Get whether this node is a wildcard node
*/
public boolean isWildcard()
{
return this.isWildcardNode;
}
/**
* Get the name of this permission node
*/
public String getName()
{
return this.nodeName;
}
/**
* Get the value of this permission node
*/
public boolean getValue()
{
return this.value;
}
/**
* Set the value of this permission node
*
* @param newValue
*/
public void setValue(boolean newValue)
{
this.value = newValue;
}
/**
* Get the specified node name
*
* @param name
*/
public Permission getPermission(String name)
{
Permission fallback = (this.isWildcardNode) ? this : null;
if (name.indexOf('.') > -1)
{
String head = name.substring(0, name.indexOf('.'));
String tail = name.substring(name.indexOf('.') + 1);
Permission child = this.getPermission(head);
if (child != null)
{
return child.getPermission(tail);
}
}
else if (this.childNodes.containsKey(name))
{
return this.childNodes.get(name);
}
for (Permission childPermission : this.childNodes.values())
{
if (childPermission.isWildcard())
{
return childPermission;
}
}
return fallback;
}
/**
* Set the specified node name
*
* @param name
*/
public Permission setPermission(String name)
{
return this.setPermission(name, true);
}
/**
* Set the specified permission to the specified value
*
* @param name
* @param value
*/
public Permission setPermission(String name, boolean value)
{
if (name.indexOf('.') > -1)
{
String head = name.substring(0, name.indexOf('.'));
String tail = name.substring(name.indexOf('.') + 1);
Permission child = this.setPermission(head, false);
return child.setPermission(tail, value);
}
Permission child = this.getPermission(name);
if (child == null || child.isWildcard())
{
child = new Permission(name, value);
this.childNodes.put(child.getName(), child);
}
else
{
child.setValue(value | child.value);
}
return child;
}
/**
* Sets a permission and also explicitly sets the permission value, this
* allows negated permissions to be set.
*
* @param name
* @param value
*/
public Permission setPermissionAndValue(String name, boolean value)
{
Permission permission = this.setPermission(name, value);
permission.setValue(value);
return permission;
}
/**
* Check whether the specified permission is set
*
* @param name
* @param value
*/
public boolean isSet(String name, boolean value)
{
Permission child = this.getPermission(name);
return child == null ? value : child.getValue();
}
}