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/*
 * Copyright (C) 2008 Google Inc.
 *
 * 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 com.google.inject.spi;

import static com.google.common.base.Preconditions.checkNotNull;

import com.google.common.collect.ImmutableList;
import com.google.inject.Binder;
import com.google.inject.matcher.Matcher;
import java.lang.reflect.Method;
import java.util.List;
import org.aopalliance.intercept.MethodInterceptor;

/**
 * Registration of interceptors for matching methods of matching classes. Instances are created
 * explicitly in a module using {@link com.google.inject.Binder#bindInterceptor( Matcher, Matcher,
 * MethodInterceptor[]) bindInterceptor()} statements:
 *
 * 
 *     bindInterceptor(Matchers.subclassesOf(MyAction.class),
 *         Matchers.annotatedWith(Transactional.class),
 *         new MyTransactionInterceptor());
* * or from an injectable type listener using {@link TypeEncounter#bindInterceptor(Matcher, * org.aopalliance.intercept.MethodInterceptor[]) TypeEncounter.bindInterceptor()}. * * @author [email protected] (Jesse Wilson) * @since 2.0 */ public final class InterceptorBinding implements Element { private final Object source; private final Matcher> classMatcher; private final Matcher methodMatcher; private final ImmutableList interceptors; InterceptorBinding( Object source, Matcher> classMatcher, Matcher methodMatcher, MethodInterceptor[] interceptors) { this.source = checkNotNull(source, "source"); this.classMatcher = checkNotNull(classMatcher, "classMatcher"); this.methodMatcher = checkNotNull(methodMatcher, "methodMatcher"); this.interceptors = ImmutableList.copyOf(interceptors); } @Override public Object getSource() { return source; } public Matcher> getClassMatcher() { return classMatcher; } public Matcher getMethodMatcher() { return methodMatcher; } public List getInterceptors() { return interceptors; } @Override public T acceptVisitor(ElementVisitor visitor) { return visitor.visit(this); } @Override public void applyTo(Binder binder) { binder .withSource(getSource()) .bindInterceptor( classMatcher, methodMatcher, interceptors.toArray(new MethodInterceptor[interceptors.size()])); } }




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