# ManyAssociationMixin.java

    /*
     * Copyright (c) 2007, 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.api.association;

    import java.lang.reflect.InvocationHandler;
    import java.lang.reflect.Method;
    import org.qi4j.api.common.AppliesTo;
    import org.qi4j.api.common.AppliesToFilter;
    import org.qi4j.api.injection.scope.State;

    /**
     * Generic mixin for associations.
     */
    @AppliesTo( { ManyAssociationMixin.AssociationFilter.class } )
    public final class ManyAssociationMixin
        implements InvocationHandler
    {
        @State
        private AssociationStateHolder associations;

        @Override
        public Object invoke( Object proxy, Method method, Object[] args )
            throws Throwable
        {
            return associations.manyAssociationFor( method );
        }

        /**
         * ManyAssociations generic mixin AppliesToFilter.
         */
        public static class AssociationFilter
            implements AppliesToFilter
        {
            @Override
            public boolean appliesTo( Method method, Class<?> mixin, Class<?> compositeType, Class<?> modifierClass )
            {
                return ManyAssociation.class.isAssignableFrom( method.getReturnType() );
            }
        }
    }