org.wildfly.security.authz.AggregateAttributes Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Copyright 2019 Red Hat, Inc.
*
* 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.authz;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
/**
* An implementation of {@link Attributes} aggregating multiple instances.
*
* Attributes are aggregated on a 'first defined wins' basis, i.e. the first definition of a specific attribute is the one used and remaining definitions are discarded.
*
* @author Darran Lofthouse
*/
public class AggregateAttributes implements Attributes {
private final Map aggregatedEntries;
private AggregateAttributes(final Attributes[] aggrgatedAttributes) {
Map aggregatedEntries = new HashMap<>();
for (Attributes currentAttributes : aggrgatedAttributes) {
for (Entry currentEntry : currentAttributes.entries()) {
String key = currentEntry.getKey();
if (aggregatedEntries.containsKey(key) == false) {
aggregatedEntries.put(key, currentEntry);
}
}
}
this.aggregatedEntries = aggregatedEntries;
}
public static Attributes aggregateOf(Attributes... aggrgatedAttributes) {
return new AggregateAttributes(aggrgatedAttributes)
.asReadOnly();
}
@Override
public Collection entries() {
return aggregatedEntries.values();
}
@Override
public int size(String key) {
return get(key).size();
}
@Override
public Entry get(String key) {
if (aggregatedEntries.containsKey(key)) {
return aggregatedEntries.get(key);
}
// We don't know about this attribute key and can't add it to any of the aggreagted entries.
return new SimpleAttributesEntry(Attributes.EMPTY, key);
}
@Override
public String get(String key, int idx) {
return get(key).get(idx);
}
@Override
public int size() {
return entries().size();
}
}