    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.assets;
    014
    015import org.apache.tapestry5.ioc.annotations.UsesMappedConfiguration;
    016
    017/**
    018 * Identifies which content types are compressable. In general, content types are assumed to be compressable. The
    019 * configuration of the service identifies exceptions, which are usually image file formats.
    020 *
    021 * The configuration maps content types to boolean values (true for compressable).
    022 *
    023 * Since 5.4, the contributed values may also be a wild-card such as "image/*" (that is, the subtype
    024 * may be a '*' to match any content type with the same top-level type).
    025 *
    026 * @since 5.3
    027 */
    028@UsesMappedConfiguration(boolean.class)
    029public interface CompressionAnalyzer
    030{
    031    /**
    032     * For a given MIME type, is the content compressable via GZip?
    033     *
    034     * @param contentType
    035     *         MIME content type, possibly included attributes such as encoding type
    036     * @return true if the content is not "naturally" compressed
    037     */
    038    boolean isCompressable(String contentType);
    039}