| /******************************************************************************* |
| * Copyright (c) 2010, 2013 Sonatype, Inc. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Stuart McCulloch (Sonatype, Inc.) - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.sisu.inject; |
| |
| import java.lang.annotation.Annotation; |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Proxy; |
| import java.util.Iterator; |
| |
| import org.sonatype.inject.BeanEntry; |
| import org.sonatype.inject.Mediator; |
| |
| import com.google.inject.Provider; |
| |
| /** |
| * @deprecated Limited support for migrating legacy types. |
| */ |
| @Deprecated |
| public final class Legacy<S> |
| { |
| // ---------------------------------------------------------------------- |
| // Constants |
| // ---------------------------------------------------------------------- |
| |
| @SuppressWarnings( "rawtypes" ) |
| private static final Legacy<org.eclipse.sisu.BeanEntry<?, ?>> LEGACY_BEAN_ENTRY = |
| Legacy.<org.eclipse.sisu.BeanEntry<?, ?>, BeanEntry> as( BeanEntry.class ); |
| |
| // ---------------------------------------------------------------------- |
| // Implementation fields |
| // ---------------------------------------------------------------------- |
| |
| private final Constructor<?> proxyConstructor; |
| |
| // ---------------------------------------------------------------------- |
| // Constructors |
| // ---------------------------------------------------------------------- |
| |
| private Legacy( final Class<? extends S> clazz ) |
| { |
| final Class<?> proxyClazz = Proxy.getProxyClass( clazz.getClassLoader(), clazz ); |
| try |
| { |
| this.proxyConstructor = proxyClazz.getConstructor( InvocationHandler.class ); |
| } |
| catch ( final NoSuchMethodException e ) |
| { |
| throw new IllegalStateException( e ); // should never occur |
| } |
| } |
| |
| // ---------------------------------------------------------------------- |
| // Public methods |
| // ---------------------------------------------------------------------- |
| |
| @SuppressWarnings( "unchecked" ) |
| public <T extends S> T proxy( final S delegate ) |
| { |
| try |
| { |
| return null == delegate ? null : (T) proxyConstructor.newInstance( new InvocationHandler() |
| { |
| public Object invoke( final Object proxy, final Method method, final Object[] args ) |
| throws Exception |
| { |
| return method.invoke( delegate, args ); |
| } |
| } ); |
| } |
| catch ( final Exception e ) |
| { |
| throw new IllegalStateException( e ); // should never occur |
| } |
| } |
| |
| // ---------------------------------------------------------------------- |
| // Utility methods |
| // ---------------------------------------------------------------------- |
| |
| public static <S, T extends S> Legacy<S> as( final Class<T> clazz ) |
| { |
| return new Legacy<S>( clazz ); |
| } |
| |
| public static <Q extends Annotation, T> BeanEntry<Q, T> adapt( final org.eclipse.sisu.BeanEntry<Q, T> delegate ) |
| { |
| return LEGACY_BEAN_ENTRY.proxy( delegate ); |
| } |
| |
| public static <Q extends Annotation, T> Iterable<BeanEntry<Q, T>> adapt( final Iterable<? extends org.eclipse.sisu.BeanEntry<Q, T>> delegate ) |
| { |
| return new Iterable<BeanEntry<Q, T>>() |
| { |
| public Iterator<BeanEntry<Q, T>> iterator() |
| { |
| final Iterator<? extends org.eclipse.sisu.BeanEntry<Q, T>> itr = delegate.iterator(); |
| return new Iterator<BeanEntry<Q, T>>() |
| { |
| public boolean hasNext() |
| { |
| return itr.hasNext(); |
| } |
| |
| public BeanEntry<Q, T> next() |
| { |
| return Legacy.adapt( itr.next() ); |
| } |
| |
| public void remove() |
| { |
| itr.remove(); |
| } |
| }; |
| } |
| }; |
| } |
| |
| public static <Q extends Annotation, T> Provider<Iterable<BeanEntry<Q, T>>> adapt( final Provider<Iterable<? extends org.eclipse.sisu.BeanEntry<Q, T>>> delegate ) |
| { |
| return new Provider<Iterable<BeanEntry<Q, T>>>() |
| { |
| public Iterable<BeanEntry<Q, T>> get() |
| { |
| return Legacy.adapt( delegate.get() ); |
| } |
| }; |
| } |
| |
| public static <Q extends Annotation, T, W> org.eclipse.sisu.Mediator<Q, T, W> adapt( final Mediator<Q, T, W> delegate ) |
| { |
| return null == delegate ? null : new org.eclipse.sisu.Mediator<Q, T, W>() |
| { |
| public void add( final org.eclipse.sisu.BeanEntry<Q, T> entry, final W watcher ) |
| throws Exception |
| { |
| delegate.add( Legacy.adapt( entry ), watcher ); |
| } |
| |
| public void remove( final org.eclipse.sisu.BeanEntry<Q, T> entry, final W watcher ) |
| throws Exception |
| { |
| delegate.remove( Legacy.adapt( entry ), watcher ); |
| } |
| }; |
| } |
| } |