    001// Copyright 2013 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.webresources;
    016
    017import org.apache.tapestry5.services.assets.ResourceTransformer;
    018
    019/**
    020 * Creates ResourceTransformer around a named {@link org.apache.tapestry5.webresources.services.ResourceProcessor}.
    021 *
    022 * @see org.apache.tapestry5.services.assets.StreamableResourceSource
    023 * @since 5.4
    024 */
    025public interface ResourceTransformerFactory
    026{
    027
    028    /**
    029     * Constructs a compiler around a another ResourceTransformer implementation. In development mode, the wrapped version
    030     * will handle caching, as well as logging output of timing for the real implementation.
    031     *
    032     * @param sourceName
    033     *         for debugging: source name, e.g., "Less"
    034     * @param targetName
    035     *         for debugging: target name, e.g., "CSS"
    036     * @param transformer
    037     *         performs the actual work
    038     * @param cacheMode
    039     *         Indicates if and how the compiled content should be cached (in development mode only)
    040     * @return transformer
    041     * @see org.apache.tapestry5.webresources.services.ResourceProcessorSource
    042     */
    043    ResourceTransformer createCompiler(String contentType, String sourceName, String targetName, ResourceTransformer transformer, CacheMode cacheMode);
    044
    045}