org.wildfly.security.permission.ByNamePermissionCollection Maven / Gradle / Ivy
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* 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;
import java.security.Permission;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.concurrent.ConcurrentHashMap;
/**
* A permission collection for actionless permissions which are organized by name.
*
* @author David M. Lloyd
*/
public final class ByNamePermissionCollection extends AbstractPermissionCollection {
private final ConcurrentHashMap byName = new ConcurrentHashMap<>();
private volatile Permission all;
/**
* The source permission used to construct this collection.
*
* @param sourcePermission the source permission (must not be {@code null})
*/
public ByNamePermissionCollection(final AbstractPermission sourcePermission) {
super(sourcePermission);
}
public int size() {
return all != null ? 1 : byName.size();
}
public Iterator iterator() {
return getIterablePermissions().iterator();
}
public Enumeration elements() {
return Collections.enumeration(getIterablePermissions());
}
private Collection getIterablePermissions() {
return all != null ? Collections.singleton(all) : Arrays.asList(byName.values().toArray(PermissionUtil.NO_PERMISSIONS));
}
protected void doAdd(final AbstractPermission permission) {
if (permission.getName().equals("*")) {
all = permission;
byName.clear();
} else {
byName.putIfAbsent(permission.getName(), permission);
}
}
public boolean implies(final Permission permission) {
if (permission == null || getSourcePermission().getClass() != permission.getClass()) {
return false;
}
final Permission all = this.all;
if (all != null) {
return all.implies(permission);
}
final Permission ourPermission = byName.get(permission.getName());
return ourPermission != null && ourPermission.implies(permission);
}
}