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    
015    package 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     */
025    public 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    }