/*
* 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.apache.karaf.itests.util;
import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.junit.Assume;
import org.junit.rules.MethodRule;
import org.junit.runners.model.FrameworkMethod;
import org.junit.runners.model.Statement;
public class RunIfRule implements MethodRule {
public interface RunIfCondition {
boolean isSatisfied();
}
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.ANNOTATION_TYPE})
@Inherited
public @interface RunIf {
Class<? extends RunIfCondition> condition();
}
public Statement apply(Statement base, FrameworkMethod method, Object target) {
List<RunIf> ignores = findRunIfs(method.getAnnotations(), new ArrayList<RunIf>(), new HashSet<Class>());
if (ignores.isEmpty()) {
return base;
}
for (RunIf ignore : ignores) {
RunIfCondition condition = newCondition(ignore, target);
if (!condition.isSatisfied()) {
return new IgnoreStatement(condition);
}
}
return base;
}
private List<RunIf> findRunIfs(Annotation[] annotations, List<RunIf> ignores, Set<Class> tested) {
for (Annotation annotation : annotations) {
if (tested.add(annotation.getClass())) {
if (annotation instanceof RunIf) {
ignores.add((RunIf) annotation);
} else {
findRunIfs(annotation.getClass().getAnnotations(), ignores, tested);
for (Class cl : annotation.getClass().getInterfaces()) {
findRunIfs(cl.getAnnotations(), ignores, tested);
}
}
}
}
return ignores;
}
private RunIfCondition newCondition(RunIf annotation, Object instance) {
final Class<? extends RunIfCondition> cond = annotation.condition();
try {
if (cond.isMemberClass()) {
if (Modifier.isStatic(cond.getModifiers())) {
return cond.getDeclaredConstructor(new Class<?>[]{}).newInstance();
} else if (instance != null && instance.getClass().isAssignableFrom(cond.getDeclaringClass())) {
return cond.getDeclaredConstructor(new Class<?>[]{instance.getClass()}).newInstance(instance);
}
throw new IllegalArgumentException("Unable to instanciate " + cond.getClass().getName());
} else {
return cond.newInstance();
}
} catch (RuntimeException re) {
throw re;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private static class IgnoreStatement extends Statement {
private RunIfCondition condition;
IgnoreStatement(RunIfCondition condition) {
this.condition = condition;
}
@Override
public void evaluate() {
Assume.assumeTrue("Ignored by " + condition.getClass().getSimpleName(), false);
}
}
}