    001    //  Copyright 2008, 2009 The Apache Software Foundation
    002    //
    003    // Licensed under the Apache License, Version 2.0 (the "License");
    004    // you may not use this file except in compliance with the License.
    005    // You may obtain a copy of the License at
    006    //
    007    //     http://www.apache.org/licenses/LICENSE-2.0
    008    //
    009    // Unless required by applicable law or agreed to in writing, software
    010    // distributed under the License is distributed on an "AS IS" BASIS,
    011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012    // See the License for the specific language governing permissions and
    013    // limitations under the License.
    014
    015    package org.apache.tapestry5.internal.bindings;
    016
    017    import org.apache.tapestry5.ioc.Location;
    018
    019    /**
    020     * Extends {@link org.apache.tapestry5.internal.bindings.AbstractBinding} with a description and a binding type, with
    021     * invariant forced to true.
    022     */
    023    public abstract class InvariantBinding extends AbstractBinding
    024    {
    025        private final Class bindingType;
    026
    027        protected final String description;
    028
    029        public InvariantBinding(Location location, Class bindingType, String description)
    030        {
    031            super(location);
    032
    033            this.bindingType = bindingType;
    034            this.description = description;
    035        }
    036
    037        /**
    038         * Returns true.
    039         */
    040        @Override
    041        public boolean isInvariant()
    042        {
    043            return true;
    044        }
    045
    046        @Override
    047        public Class getBindingType()
    048        {
    049            return bindingType;
    050        }
    051
    052        @Override
    053        public String toString()
    054        {
    055            return String.format("InvariantBinding[%s]", description);
    056        }
    057    }