io.astefanutti.metrics.aspectj.MetricStrategyFactory Maven / Gradle / Ivy
/**
* Copyright © 2013 Antonin Stefanutti ([email protected])
*
* 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 io.astefanutti.metrics.aspectj;
/* package-private */ final class MetricStrategyFactory {
static MetricStrategy newInstance(Object object) {
if (isElAvailable(object.getClass()))
return new JavaxElMetricStrategy(object);
else
// Expression Language 3.0 is not available, fall back to SE implementation
return new JavaSeMetricStrategy();
}
static MetricStrategy newInstance(Class clazz) {
if (isElAvailable(clazz))
return new JavaxElMetricStrategy(clazz);
else
// Expression Language 3.0 is not available, fall back to SE implementation
return new JavaSeMetricStrategy();
}
private static ClassLoader getClassLoader(Class clazz) {
if (Thread.currentThread().getContextClassLoader() != null)
return Thread.currentThread().getContextClassLoader();
else
return clazz.getClassLoader();
}
private static boolean isElAvailable(Class clazz) {
try {
getClassLoader(clazz).loadClass("javax.el.ELProcessor");
return true;
} catch (ClassNotFoundException cause) {
return false;
}
}
}