001    /**
002     Licensed to the Apache Software Foundation (ASF) under one or more
003     contributor license agreements.  See the NOTICE file distributed with
004     this work for additional information regarding copyright ownership.
005     The ASF licenses this file to You under the Apache License, Version 2.0
006     (the "License"); you may not use this file except in compliance with
007     the License.  You may obtain a copy of the License at
008    
009          http://www.apache.org/licenses/LICENSE-2.0
010    
011     Unless required by applicable law or agreed to in writing, software
012     distributed under the License is distributed on an "AS IS" BASIS,
013     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     See the License for the specific language governing permissions and
015     limitations under the License.
016    */
017    package org.apache.commons.inject.impl;
018    
019    import java.lang.reflect.Method;
020    
021    import org.apache.commons.inject.api.IBinding;
022    import org.apache.commons.inject.api.IInjector;
023    import org.apache.commons.inject.api.IPoint;
024    import org.apache.commons.inject.util.Exceptions;
025    
026    public class MethodPoint<T> implements IPoint<T>, IInjectorAware {
027            private final IBinding<Object>[] bindings;
028            private final Method method;
029    
030            public MethodPoint(IBinding<Object>[] pBindings, Method pMethod) {
031                    bindings = pBindings;
032                    method = pMethod;
033            }
034    
035            @Override
036            public void injectTo(T pInstance, IInjector pInjector) {
037                    try {
038                            final Object[] args = new Object[bindings.length];
039                            for (int i = 0;  i < args.length;  i++) {
040                                    args[i] = bindings[i].getProvider().get();
041                            }
042                            if (!method.isAccessible()) {
043                                    method.setAccessible(true);
044                            }
045                            method.invoke(pInstance, args);
046                    } catch (Throwable t) {
047                            throw Exceptions.show(t);
048                    }
049            }
050    
051            @Override
052            public void init(IInjector pInjector) {
053                    for (IBinding<Object> binding : bindings) {
054                            if (binding instanceof IInjectorAware) {
055                                    ((IInjectorAware) binding).init(pInjector);
056                            }
057                    }
058            }
059    }