    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
    015package org.apache.tapestry5.internal.bindings;
    016
    017import org.apache.tapestry5.commons.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 */
    023public 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}