    001// Licensed under the Apache License, Version 2.0 (the "License");
    002// you may not use this file except in compliance with the License.
    003// You may obtain a copy of the License at
    004//
    005//     http://www.apache.org/licenses/LICENSE-2.0
    006//
    007// Unless required by applicable law or agreed to in writing, software
    008// distributed under the License is distributed on an "AS IS" BASIS,
    009// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    010// See the License for the specific language governing permissions and
    011// limitations under the License.
    012
    013package org.apache.tapestry5.services.compatibility;
    014
    015import org.apache.tapestry5.ioc.annotations.UsesMappedConfiguration;
    016
    017/**
    018 * Used globally to track what compatibility traits are enabled.  By default, in Tapestry 5.4,
    019 * all traits are enabled unless explicitly disabled. This behavior may change in Tapestry 5.5.
    020 *
    021 * The configuration allows traits to be explicitly enabled or disabled.
    022 *
    023 * @since 5.4
    024 */
    025@UsesMappedConfiguration(key = Trait.class, value = Boolean.class)
    026public interface Compatibility
    027{
    028    /**
    029     * Returns true if the indicated compatibility trait is enabled.
    030     *
    031     * @param trait
    032     * @return true if enabled, false otherwise
    033     */
    034    boolean enabled(Trait trait);
    035}