001// Copyright 2008, 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
015package org.apache.tapestry5;
016
017/**
018 * Meta-data keys that are applied to components and pages.  In addition, in many cases a {@linkplain
019 * org.apache.tapestry5.SymbolConstants symbol constant key} is also a meta data key (where the symbol value is the
020 * ultimate default).
021 *
022 * @see org.apache.tapestry5.services.MetaDataLocator
023 * @see org.apache.tapestry5.MetaDataConstants
024 */
025public class MetaDataConstants
026{
027    /**
028     * Meta data key applied to pages that sets the response content type. A factory default provides the value
029     * "text/html" when not overridden.
030     */
031    public static final String RESPONSE_CONTENT_TYPE = "tapestry.response-content-type";
032
033    /**
034     * Meta data key applied to pages that may only be accessed via secure methods (HTTPS).
035     */
036    public static final String SECURE_PAGE = "tapestry.secure-page";
037
038    /**
039     * Meta-data for identifying pages that should only be accessible from clients on the whitelist.
040     * The meta-default is "false".
041     *
042     * @see org.apache.tapestry5.services.security.ClientWhitelist
043     * @since 5.3
044     */
045    public static final String WHITELIST_ONLY_PAGE = "tapestry.white-list-only-page";
046
047    /**
048     * Meta data key applied to pages that may only be accessed with a exact activation context.
049     *
050     * @since 5.4
051     */
052    public static final String UNKNOWN_ACTIVATION_CONTEXT_CHECK = "tapestry.unknwon-activation-context-check";
053}