org.wildfly.security.provider.util.ProviderServiceLoaderSupplier 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).
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/*
* JBoss, Home of Professional Open Source.
* Copyright 2018 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.provider.util;
import static org.wildfly.security.provider.util.ProviderUtil.INSTALLED_PROVIDERS;
import java.security.Provider;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.ServiceConfigurationError;
import java.util.ServiceLoader;
import java.util.Set;
/**
* A supplier which uses a service loader to find all {@link Provider} instances that aren't in the list of
* installed security providers and returns them as an array. The result is then cached.
*
* @author Farah Juma
* @since 1.2.2
*/
public class ProviderServiceLoaderSupplier extends ServiceLoaderSupplier {
final boolean elytronProviderStaticallyAdded;
public ProviderServiceLoaderSupplier(final ClassLoader classLoader) {
this(classLoader, false);
}
public ProviderServiceLoaderSupplier(final ClassLoader classLoader, final boolean elytronProviderStaticallyAdded) {
super(Provider.class, classLoader);
this.elytronProviderStaticallyAdded = elytronProviderStaticallyAdded;
}
Provider[] loadServices(final Class service, final ClassLoader classLoader) {
Provider[] providers = INSTALLED_PROVIDERS.get();
Set> installedProvidersSet = new HashSet<>((providers != null ? providers.length : 0) + (elytronProviderStaticallyAdded ? 15 : 0));
if (elytronProviderStaticallyAdded) {
for (Class elytronProviderClassName : ProviderFactory.getWildflyElytronProviderClasses(ProviderServiceLoaderSupplier.class.getClassLoader())) {
installedProvidersSet.add(elytronProviderClassName);
}
}
if (providers != null) {
for (int i = 0; i < providers.length; i++) {
installedProvidersSet.add(providers[i].getClass());
}
}
ArrayList list = new ArrayList<>();
ServiceLoader loader = ServiceLoader.load(service, classLoader);
Iterator iterator = loader.iterator();
for (;;) try {
if (! iterator.hasNext()) {
return list.toArray(new Provider[list.size()]);
}
Provider provider = iterator.next();
if (! installedProvidersSet.contains(provider.getClass())) {
list.add(provider);
}
} catch (ServiceConfigurationError ignored) {
// explicitly ignored
}
}
public int hashCode() {
return super.hashCode();
}
public boolean equals(final Object obj) {
return obj instanceof ProviderServiceLoaderSupplier && equals((ProviderServiceLoaderSupplier) obj);
}
private boolean equals(final ProviderServiceLoaderSupplier other) {
return other == this || other.classLoader == classLoader;
}
}