001    // Copyright 2007, 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.dom;
016    
017    import org.apache.tapestry5.ioc.internal.util.InternalUtils;
018    
019    import java.io.PrintWriter;
020    
021    /**
022     * Representation of a document type. Note that technically, a Doctype isn't a node in an xml document; hence this
023     * doesn't extend node.
024     */
025    public class DTD
026    {
027        private final String name;
028    
029        private final String publicId;
030    
031        private final String systemId;
032    
033        public DTD(String name, String publicId, String systemId)
034        {
035            assert InternalUtils.isNonBlank(name);
036    
037            this.name = name;
038            this.publicId = publicId;
039            this.systemId = systemId;
040        }
041    
042        public void toMarkup(PrintWriter writer)
043        {
044            if (publicId != null)
045            {
046                if (systemId != null)
047                {
048                    writer.printf("<!DOCTYPE %s PUBLIC \"%s\" \"%s\">", name, publicId, systemId);
049                } else
050                {
051                    writer.printf("<!DOCTYPE %s PUBLIC \"%s\">", name, publicId);
052                }
053            } else if (systemId != null)
054            {
055                writer.printf("<!DOCTYPE %s SYSTEM \"%s\">", name, systemId);
056            } else
057            {
058                writer.printf("<!DOCTYPE %s>", name);
059            }
060        }
061    }