Jre18Compat.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.tomcat.util.compat;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.concurrent.Callable;
import java.util.concurrent.CompletionException;
import javax.security.auth.Subject;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
import org.apache.tomcat.util.res.StringManager;
public class Jre18Compat extends Jre16Compat {
private static final Log log = LogFactory.getLog(Jre18Compat.class);
private static final StringManager sm = StringManager.getManager(Jre18Compat.class);
private static final Method callAsMethod;
static {
Method m1 = null;
try {
m1 = Subject.class.getMethod("callAs", Subject.class, Callable.class);
} catch (NoSuchMethodException e) {
// Must before-Java 18
log.debug(sm.getString("jre18Compat.javaPre18"), e);
}
callAsMethod = m1;
}
static boolean isSupported() {
return callAsMethod != null;
}
@SuppressWarnings("unchecked")
@Override
public <T> T callAs(Subject subject, Callable<T> action) throws CompletionException {
try {
return (T) callAsMethod.invoke(null, subject, action);
} catch (IllegalAccessException e) {
throw new CompletionException(e);
} catch (InvocationTargetException e) {
Throwable cause = e.getCause();
if (cause instanceof CompletionException) {
throw (CompletionException) cause;
}
throw new CompletionException(e);
}
}
}