# MethodConstraintDetailDescriptor.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 org.qi4j.api.constraint.ConstraintDescriptor;

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

    public final class MethodConstraintDetailDescriptor
    {
        private final ConstraintDescriptor descriptor;
        private MethodConstraintsDetailDescriptor constraints;

        MethodConstraintDetailDescriptor( ConstraintDescriptor aDescriptor )
            throws IllegalArgumentException
        {
            validateNotNull( "aDescriptor", aDescriptor );

            descriptor = aDescriptor;
        }

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

        /**
         * @return Constraints that own this {@code MethodConstraintDetailDescriptor}. Never return {@code null}.
         *
         * @since 0.5
         */
        public final MethodConstraintsDetailDescriptor constraints()
        {
            return constraints;
        }

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

       final void setConstraints( MethodConstraintsDetailDescriptor aDescriptor )
            throws IllegalArgumentException
        {
            validateNotNull( "aDescriptor", aDescriptor );

            constraints = aDescriptor;
        }
    }