    001    // Copyright 2011 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.services.assets;
    016
    017    import org.apache.tapestry5.ioc.annotations.UsesMappedConfiguration;
    018
    019    /**
    020     * Identifies which content types are compressable. In general, content types are assumed to be compressable. The
    021     * configuration of the service identifies exceptions, which are usually image file formats.
    022     * <p>
    023     * The configuration maps content types to boolean values (true for compressable).
    024     *
    025     * @since 5.3
    026     */
    027    @UsesMappedConfiguration(boolean.class)
    028    public interface CompressionAnalyzer
    029    {
    030        /**
    031         * For a given MIME type, is the content compressable via GZip?
    032         *
    033         * @param contentType
    034         *            MIME content type, possibly included attributes such as encoding type
    035         * @return true if the content is not "naturally" compressed
    036         */
    037        boolean isCompressable(String contentType);
    038    }