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}