| // |
| // ======================================================================== |
| // Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.plus.annotation; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| |
| import org.eclipse.jetty.util.IntrospectionUtil; |
| import org.eclipse.jetty.util.Loader; |
| import org.eclipse.jetty.util.TypeUtil; |
| |
| |
| |
| /** |
| * LifeCycleCallback |
| * |
| * |
| */ |
| public abstract class LifeCycleCallback |
| { |
| public static final Object[] __EMPTY_ARGS = new Object[] {}; |
| private Method _target; |
| private Class<?> _targetClass; |
| private String _className; |
| private String _methodName; |
| |
| |
| public LifeCycleCallback() |
| { |
| } |
| |
| |
| /** |
| * @return the _targetClass |
| */ |
| public Class<?> getTargetClass() |
| { |
| return _targetClass; |
| } |
| |
| public String getTargetClassName() |
| { |
| return _className; |
| } |
| |
| public String getMethodName() |
| { |
| return _methodName; |
| } |
| |
| /** |
| * @return the target |
| */ |
| public Method getTarget() |
| { |
| return _target; |
| } |
| |
| |
| public void setTarget (String className, String methodName) |
| { |
| _className = className; |
| _methodName = methodName; |
| } |
| |
| public void setTarget (Class<?> clazz, String methodName) |
| { |
| try |
| { |
| Method method = IntrospectionUtil.findMethod(clazz, methodName, null, true, true); |
| validate(clazz, method); |
| _target = method; |
| _targetClass = clazz; |
| _className = clazz.getCanonicalName(); |
| _methodName = methodName; |
| } |
| catch (NoSuchMethodException e) |
| { |
| throw new IllegalArgumentException ("Method "+methodName+" not found on class "+clazz.getName()); |
| } |
| } |
| |
| |
| |
| |
| public void callback (Object instance) |
| throws SecurityException, NoSuchMethodException, ClassNotFoundException, IllegalArgumentException, IllegalAccessException, InvocationTargetException |
| { |
| if (_target == null) |
| { |
| if (_targetClass == null) |
| _targetClass = Loader.loadClass(_className); |
| _target = _targetClass.getDeclaredMethod(_methodName, TypeUtil.NO_ARGS); |
| } |
| |
| if (_target != null) |
| { |
| boolean accessibility = getTarget().isAccessible(); |
| getTarget().setAccessible(true); |
| getTarget().invoke(instance, __EMPTY_ARGS); |
| getTarget().setAccessible(accessibility); |
| } |
| } |
| |
| |
| |
| /** |
| * Find a method of the given name either directly in the given |
| * class, or inherited. |
| * |
| * @param pack the package of the class under inspection |
| * @param clazz the class under inspection |
| * @param methodName the method to find |
| * @param checkInheritance false on first entry, true if a superclass is being introspected |
| * @return the method |
| */ |
| public Method findMethod (Package pack, Class<?> clazz, String methodName, boolean checkInheritance) |
| { |
| if (clazz == null) |
| return null; |
| |
| try |
| { |
| Method method = clazz.getDeclaredMethod(methodName); |
| if (checkInheritance) |
| { |
| int modifiers = method.getModifiers(); |
| if (Modifier.isProtected(modifiers) || Modifier.isPublic(modifiers) || (!Modifier.isPrivate(modifiers)&&(pack.equals(clazz.getPackage())))) |
| return method; |
| else |
| return findMethod(clazz.getPackage(), clazz.getSuperclass(), methodName, true); |
| } |
| return method; |
| } |
| catch (NoSuchMethodException e) |
| { |
| return findMethod(clazz.getPackage(), clazz.getSuperclass(), methodName, true); |
| } |
| } |
| |
| public boolean equals (Object o) |
| { |
| if (o==null) |
| return false; |
| if (!(o instanceof LifeCycleCallback)) |
| return false; |
| LifeCycleCallback callback = (LifeCycleCallback)o; |
| |
| if (callback.getTargetClass()==null) |
| { |
| if (getTargetClass() != null) |
| return false; |
| } |
| else if(!callback.getTargetClass().equals(getTargetClass())) |
| return false; |
| if (callback.getTarget()==null) |
| { |
| if (getTarget() != null) |
| return false; |
| } |
| else if (!callback.getTarget().equals(getTarget())) |
| return false; |
| |
| return true; |
| } |
| |
| public abstract void validate (Class<?> clazz, Method m); |
| } |