# ConstraintService.java

    /*
     * Copyright (c) 2011, Paul Merlin. 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.library.http;

    import org.eclipse.jetty.security.ConstraintMapping;
    import org.eclipse.jetty.util.security.Constraint;
    import org.qi4j.api.injection.scope.Service;
    import org.qi4j.api.mixin.Mixins;
    import org.qi4j.api.service.ServiceComposite;
    import org.qi4j.api.service.ServiceReference;
    import org.qi4j.library.http.ConstraintInfo.HttpMethod;

    @Mixins( ConstraintService.Mixin.class )
    public interface ConstraintService
            extends ServiceComposite
    {

        ConstraintMapping buildConstraintMapping();

        static abstract class Mixin
                implements ConstraintService
        {

            @Service
            private ServiceReference<ConstraintService> myRef;

            @Override
            public ConstraintMapping buildConstraintMapping()
            {
                ConstraintMapping csMapping = null;
                ConstraintInfo constraintInfo = myRef.metaInfo( ConstraintInfo.class );
                if ( constraintInfo != null && constraintInfo.getConstraint() != null ) {
                    Constraint constraint = new Constraint();
                    switch ( constraintInfo.getConstraint() ) {
                    }
                    csMapping = new ConstraintMapping();
                    csMapping.setConstraint( constraint );
                    csMapping.setPathSpec( constraintInfo.getPath() );
                    if ( constraintInfo.getOmittedHttpMethods() != null && constraintInfo.getOmittedHttpMethods().length > 0 ) {
                        csMapping.setMethodOmissions( HttpMethod.toStringArray( constraintInfo.getOmittedHttpMethods() ) );
                    }
                }
                return csMapping;
            }

        }

    }