org.codehaus.groovy.reflection.GroovyClassValueFactory Maven / Gradle / Ivy
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* distributed with this work for additional information
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* 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
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
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*/
package org.codehaus.groovy.reflection;
import org.codehaus.groovy.reflection.GroovyClassValue.ComputeValue;
import java.lang.reflect.Constructor;
class GroovyClassValueFactory {
/**
* This flag is introduced as a (hopefully) temporary workaround for a JVM bug, that is to say that using
* ClassValue prevents the classes and classloaders from being unloaded.
* See https://bugs.openjdk.java.net/browse/JDK-8136353
* This issue does not exist on IBM Java (J9) so use ClassValue by default on that JVM.
*/
private static final boolean USE_CLASSVALUE = Boolean.valueOf(System.getProperty("groovy.use.classvalue", "IBM J9 VM".equals(System.getProperty("java.vm.name"))?"true":"false"));
private static final Constructor groovyClassValueConstructor;
static {
Class groovyClassValueClass;
if (USE_CLASSVALUE) {
try {
Class.forName("java.lang.ClassValue");
try {
groovyClassValueClass = Class.forName("org.codehaus.groovy.reflection.v7.GroovyClassValueJava7");
} catch (Exception e) {
throw new RuntimeException(e); // this should never happen, but if it does, let it propagate and be fatal
}
} catch (ClassNotFoundException e) {
groovyClassValueClass = GroovyClassValuePreJava7.class;
}
} else {
groovyClassValueClass = GroovyClassValuePreJava7.class;
}
try{
groovyClassValueConstructor = groovyClassValueClass.getConstructor(ComputeValue.class);
}catch(Exception e){
throw new RuntimeException(e); // this should never happen, but if it does, let it propagate and be fatal
}
}
public static GroovyClassValue createGroovyClassValue(ComputeValue computeValue){
try {
return (GroovyClassValue) groovyClassValueConstructor.newInstance(computeValue);
} catch (Exception e) {
throw new RuntimeException(e); // this should never happen, but if it does, let it propagate and be fatal
}
}
}