001    // Copyright 2005 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.tapestry.markup;
016    
017    import java.io.PrintWriter;
018    
019    import org.apache.tapestry.IMarkupWriter;
020    import org.apache.tapestry.json.IJSONWriter;
021    import org.apache.tapestry.util.ContentType;
022    
023    /**
024     * Service interface for <code>tapestry.markup.MarkupWriterSource</code> service. A factory
025     * service that creates new instances of {@link org.apache.tapestry.IMarkupWriter}, configured for
026     * different content types;
027     * 
028     * @author Howard M. Lewis Ship
029     * @since 4.0
030     */
031    public interface MarkupWriterSource
032    {
033        /**
034         * Creates and returns a new instance of {@link org.apache.tapestry.IMarkupWriter}. The content
035         * type is used to find the proper implemenation. Any additional content type data (after a ';')
036         * is ignored.
037         * 
038         * @param writer
039         *            The {@link PrintWriter}&nbsp;to which the markup writer should send output.
040         * @param contentType
041         *            Used to locate the correct markup writer implementation (used to select a
042         *            {@link MarkupFilter}.
043         * @return The configured markup writer instance.
044         */
045    
046        IMarkupWriter newMarkupWriter(PrintWriter writer, ContentType contentType);
047        
048        /**
049         * Creates and returns a new instance of {@link IJSONWriter}. The content type is used
050         * to find the proper implementation. Any additional content type data (after a ';')
051         * is ignored.
052         * 
053         * @param writer
054         *          The {@link PrintWriter}&nbsp;to which the markup writer should send output.
055         * @param contentType
056         *          Used to locate the correct markup writer implementation (used to select a
057         *          {@link MarkupFilter}.
058         * @return The configured json writer instance.
059         */
060        IJSONWriter newJSONWriter(PrintWriter writer, ContentType contentType);
061    }