# MethodConcernDetailDescriptor.java

    /*
     * Copyright (c) 2008, Edward Yakop. 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.tools.model.descriptor;

    import java.util.LinkedList;
    import java.util.List;
    import org.qi4j.api.concern.ConcernDescriptor;

    import static org.qi4j.api.util.NullArgumentException.validateNotNull;

    public final class MethodConcernDetailDescriptor
        implements InjectableDetailDescriptor
    {
        private final ConcernDescriptor descriptor;
        private MethodConcernsDetailDescriptor concerns;

        private final List<ConstructorDetailDescriptor> constructors;
        private final List<InjectedMethodDetailDescriptor> injectedMethods;
        private final List<InjectedFieldDetailDescriptor> injectedFields;

        MethodConcernDetailDescriptor( ConcernDescriptor aDescriptor )
            throws IllegalArgumentException
        {
            validateNotNull( "aDescriptor", aDescriptor );

            descriptor = aDescriptor;

            constructors = new LinkedList<>();
            injectedMethods = new LinkedList<>();
            injectedFields = new LinkedList<>();
        }

        /**
         * @return Descriptor of this {@code MethodConcernDetailDescriptor}. Never return {@code null}.
         *
         * @since 0.5
         */
        public final ConcernDescriptor descriptor()
        {
            return descriptor;
        }

        /**
         * @return Method concerns that owns this {@code MethodConcernDetailDescriptor}. Never return {@code null}.
         *
         * @since 0.5
         */
        public final MethodConcernsDetailDescriptor method()
        {
            return concerns;
        }

        /**
         * @return Constructors of this {@code MethodConcernDetailDescriptor}. Never return {@code null}.
         *
         * @since 0.5
         */
        @Override
        public final Iterable<ConstructorDetailDescriptor> constructors()
        {
            return constructors;
        }

        /**
         * @return Injected methods of this {@code MethodConcernDetailDescriptor}. Never return {@code null}.
         *
         * @since 0.5
         */
        @Override
        public final Iterable<InjectedMethodDetailDescriptor> injectedMethods()
        {
            return injectedMethods;
        }

        /**
         * @return Injected methods of this {@code MethodConcernDetailDescriptor}. Never return {@code null}.
         *
         * @since 0.5
         */
        @Override
        public final Iterable<InjectedFieldDetailDescriptor> injectedFields()
        {
            return injectedFields;
        }

       @Override
       public String toString()
       {
          return descriptor.modifierClass().getName();
       }

       final void setConcerns( MethodConcernsDetailDescriptor aDescriptor )
            throws IllegalArgumentException
        {
            validateNotNull( "aDescriptor", aDescriptor );
            concerns = aDescriptor;
        }

        final void addConstructor( ConstructorDetailDescriptor aDescriptor )
            throws IllegalArgumentException
        {
            validateNotNull( "aDescriptor", aDescriptor );

            aDescriptor.setMethodConcern( this );
            constructors.add( aDescriptor );
        }

        final void addInjectedMethod( InjectedMethodDetailDescriptor aDescriptor )
            throws IllegalArgumentException
        {
            validateNotNull( "aDescriptor", aDescriptor );

            aDescriptor.setMethodConcern( this );
            injectedMethods.add( aDescriptor );
        }

        final void addInjectedField( InjectedFieldDetailDescriptor aDescriptor )
            throws IllegalArgumentException
        {
            validateNotNull( "aDescriptor", aDescriptor );

            aDescriptor.setMethodConcern( this );
            injectedFields.add( aDescriptor );
        }
    }