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.corelib.components;
016    
017    import org.apache.tapestry5.BindingConstants;
018    import org.apache.tapestry5.MarkupWriter;
019    import org.apache.tapestry5.annotations.Parameter;
020    
021    /**
022     * Overrides the DOCTYPE of the rendered document (via {@link org.apache.tapestry5.dom.Document#dtd(String, String, String)}
023     * which can be useful when different component templates that render to the same document disagree about what the correct DOCTYPE
024     * is.
025     *
026     * @tapestrydoc
027     * @since 5.3
028     */
029    public class Doctype
030    {
031        @Parameter(required = true, allowNull = false, defaultPrefix = BindingConstants.LITERAL)
032        private String name;
033    
034        @Parameter(defaultPrefix = BindingConstants.LITERAL)
035        private String publicId, systemId;
036    
037        boolean beginRender(MarkupWriter writer)
038        {
039            writer.getDocument().dtd(name, publicId, systemId);
040    
041            return false;
042        }
043    }