# InjectedMethodModel.java

    /*
     * Copyright (c) 2008, Rickard Öberg. All Rights Reserved.
     *
     * 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 org.qi4j.runtime.injection;

    import java.lang.reflect.InvocationTargetException;
    import java.lang.reflect.Method;
    import org.qi4j.api.composite.InjectedMethodDescriptor;
    import org.qi4j.bootstrap.InjectionException;
    import org.qi4j.functional.HierarchicalVisitor;
    import org.qi4j.functional.VisitableHierarchy;

    /**
     * JAVADOC
     */
    public final class InjectedMethodModel
        implements InjectedMethodDescriptor, Dependencies, VisitableHierarchy<Object, Object>
    {
        // Model
        private Method method;
        private InjectedParametersModel parameters;

        public InjectedMethodModel( Method method, InjectedParametersModel parameters )
        {
            this.method = method;
            this.method.setAccessible( true );
            this.parameters = parameters;
        }

        @Override
        public Method method()
        {
            return method;
        }

        @Override
        public Iterable<DependencyModel> dependencies()
        {
            return parameters.dependencies();
        }

        // Context
        public void inject( InjectionContext context, Object instance )
            throws InjectionException
        {
            Object[] params = parameters.newParametersInstance( context );
            try
            {
                if( !method.isAccessible() )
                {
                    method.setAccessible( true );
                }
                method.invoke( instance, params );
            }
            catch( IllegalAccessException e )
            {
                throw new InjectionException( e );
            }
            catch( InvocationTargetException e )
            {
                throw new InjectionException( e.getTargetException() );
            }
        }

        @Override
        public <ThrowableType extends Throwable> boolean accept( HierarchicalVisitor<? super Object, ? super Object, ThrowableType> visitor )
            throws ThrowableType
        {
            if( visitor.visitEnter( this ) )
            {
                parameters.accept( visitor );
            }
            return visitor.visitLeave( this );
        }
    }