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1   /***
2    *
3    * Copyright 2004 James Strachan
4    *
5    * Licensed under the Apache License, Version 2.0 (the "License");
6    * you may not use this file except in compliance with the License.
7    * You may obtain a copy of the License at
8    *
9    * http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   *
17   **/
18  package org.codehaus.groovy.control;
19  
20  import org.codehaus.groovy.syntax.Reduction;
21  import org.codehaus.groovy.syntax.TokenStream;
22  import org.codehaus.groovy.syntax.lexer.GroovyLexer;
23  import org.codehaus.groovy.syntax.lexer.LexerTokenStream;
24  import org.codehaus.groovy.syntax.lexer.ReaderCharStream;
25  import org.codehaus.groovy.syntax.parser.Parser;
26  import org.codehaus.groovy.syntax.parser.ASTBuilder;
27  import org.codehaus.groovy.syntax.parser.ParserException;
28  import org.codehaus.groovy.ast.ModuleNode;
29  
30  import java.io.Reader;
31  
32  /***
33   * @version $Revision: 1.2 $
34   */
35  public class ClassicParserPlugin implements ParserPlugin {
36  
37  
38      public Reduction parseCST(SourceUnit sourceUnit, Reader reader) throws CompilationFailedException {
39          //
40          // Create a lexer and token stream
41  
42          GroovyLexer lexer = new GroovyLexer(new ReaderCharStream(reader));
43          TokenStream stream = new LexerTokenStream(lexer);
44  
45          //
46          // Do the parsing
47          Parser parser = new Parser(sourceUnit, stream);
48          return parser.parse();
49      }
50  
51      public ModuleNode buildAST(SourceUnit sourceUnit, ClassLoader classLoader, Reduction cst) throws ParserException {
52          ASTBuilder builder = new ASTBuilder( sourceUnit, classLoader );
53          return builder.build( cst );
54      }
55  }