org.wildfly.security.permission.NoPermission Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* Copyright 2016 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 org.wildfly.security.permission;
/**
* A permission which implies nothing, not even itself.
*
* @author David M. Lloyd
*/
public final class NoPermission extends AbstractPermission {
private static final long serialVersionUID = 2339781690941885693L;
private static final NoPermission INSTANCE = new NoPermission();
/**
* Construct a new instance.
*/
public NoPermission() {
super("");
}
/**
* Construct a new instance. The name parameter is ignored.
*
* @param ignored ignored
*/
public NoPermission(final String ignored) {
this();
}
/**
* Construct a new instance. The name and actions parameters are ignored.
*
* @param ignored1 ignored
* @param ignored2 ignored
*/
public NoPermission(final String ignored1, final String ignored2) {
this();
}
/**
* Get the no-permission instance.
*
* @return the no-permission instance (not {@code null})
*/
public static NoPermission getInstance() {
return INSTANCE;
}
/**
* Always returns {@code false}.
*
* @param permission ignored
* @return {@code false}
*/
public boolean implies(final NoPermission permission) {
return false;
}
/**
* Always returns {@code true} if the argument is not {@code null}.
*
* @param other the permission to compare to
* @return {@code true} if {@code other} is not {@code null}; {@code false} otherwise
*/
public boolean equals(final NoPermission other) {
return other != null;
}
/**
* Get the constant hash code.
*
* @return the constant hash code
*/
public int hashCode() {
return getClass().hashCode();
}
public AbstractPermissionCollection newPermissionCollection() {
return NoPermissionCollection.getInstance();
}
}