/*
* 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.openejb.util.reflection;
import org.apache.openejb.OpenEJBRuntimeException;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
public final class Reflections {
private Reflections() {
// no-op
}
public static Method findMethod(final String name, final Class<?> type, final Class<?>... args) {
try {
return type.getMethod(name, args);
} catch (final NoSuchMethodException e) {
throw new IllegalArgumentException("Can't find public method " + name + " in " + type.getName());
}
}
public static Object invokeByReflection(final Object obj, final String mtdName, final Class<?>[] paramTypes, final Object[] args) {
Class<?> clazz = obj.getClass();
while (clazz != null) {
boolean acc = true;
Method mtd = null;
try {
mtd = clazz.getDeclaredMethod(mtdName, paramTypes);
acc = mtd.isAccessible();
mtd.setAccessible(true);
return mtd.invoke(obj, args);
} catch (final NoSuchMethodException nsme) {
// no-op
} catch (final Exception e) {
throw new IllegalArgumentException(e);
} finally {
if (mtd != null) {
mtd.setAccessible(acc);
}
}
clazz = clazz.getSuperclass();
}
throw new IllegalArgumentException(new NoSuchMethodException(obj.getClass().getName() + " ." + mtdName));
}
public static void set(final Object instance, final String field, final Object value) {
Class<?> clazz = instance.getClass();
while (clazz != null) {
try {
final Field f = clazz.getDeclaredField(field);
final boolean acc = f.isAccessible();
f.setAccessible(true);
try {
f.set(instance, value);
return;
} finally {
f.setAccessible(acc);
}
} catch (final NoSuchFieldException nsfe) {
// no-op
} catch (final Exception e) {
throw new IllegalArgumentException(e);
}
clazz = clazz.getSuperclass();
}
}
public static Object get(final Object instance, final String field) {
Class<?> clazz = instance.getClass();
while (clazz != null) {
try {
final Field f = clazz.getDeclaredField(field);
final boolean acc = f.isAccessible();
f.setAccessible(true);
try {
return f.get(instance);
} finally {
f.setAccessible(acc);
}
} catch (final NoSuchFieldException nsfe) {
// no-op
} catch (final Exception e) {
throw new IllegalArgumentException(e);
}
clazz = clazz.getSuperclass();
}
throw new OpenEJBRuntimeException(new NoSuchFieldException(field));
}
}