001// Copyright 2011, 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.services.assets;
016
017import org.apache.tapestry5.http.services.Response;
018
019/**
020 * Indicates how the content inside a {@link StreamableResource} is (potentially) compressed.
021 * 
022 * @since 5.3
023 */
024public enum CompressionStatus
025{
026    /**
027     * The content may be compressed but has not yet been compressed. This is true for most text-oriented content types,
028     * but not for most image content types.
029     */
030    COMPRESSABLE,
031
032    /**
033     * The content has been compressed, which must be reflected in the {@link Response}'s content encoding.
034     */
035    COMPRESSED,
036
037    /**
038     * The content is not compressable. This is usually the case for image content types, where the native format
039     * of the content already includes compression.
040     */
041    NOT_COMPRESSABLE;
042}