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1   package org.apache.maven.doxia.macro;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import org.apache.maven.doxia.logging.LogEnabled;
23  import org.apache.maven.doxia.sink.Sink;
24  
25  /**
26   * Base interface of a macro.
27   *
28   * @author <a href="mailto:jason@maven.org">Jason van Zyl</a>
29   * @since 1.0
30   */
31  public interface Macro
32      extends LogEnabled
33  {
34      /** The Plexus lookup role. */
35      String ROLE = Macro.class.getName();
36  
37      /** The vm line separator */
38      String EOL = System.getProperty( "line.separator" );
39  
40      /**
41       * Execute the current macro using the given MacroRequest,
42       * and emit events into the given sink.
43       *
44       * @param sink The sink to receive the events.
45       * @param request The corresponding MacroRequest.
46       * @throws org.apache.maven.doxia.macro.MacroExecutionException if an error occurred during execution.
47       */
48      void execute( Sink sink, MacroRequest request )
49          throws MacroExecutionException;
50  }