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    1   /***
    2    *
    3    * Copyright 2005 Jeremy Rayner
    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.antlr.treewalker;
    19
    20  import java.io.PrintStream;
    21  import java.util.Stack;
    22
    23  import org.codehaus.groovy.antlr.GroovySourceAST;
    24
    25  /***
    26   * A simple antlr AST visitor that outputs the tokenName of each node in a pseudo xml style.
    27   *
    28   * @author <a href="mailto:groovy@ross-rayner.com">Jeremy Rayner</a>
    29   * @version $Revision: 1.2 $
    30   */
    31
    32  public class NodePrinter extends VisitorAdapter {
    33      private String[] tokenNames;
    34      private PrintStream out;
    35
    36      /***
    37       * A visitor that prints a pseudo xml output to the supplied PrintStream
    38       * @param out supplied PrintStream to output nodes to
    39       * @param tokenNames an array of token names to use
    40       */
    41      public NodePrinter(PrintStream out,String[] tokenNames) {
    42          this.tokenNames = tokenNames;
    43          this.out = out;
    44      }
    45
    46      public void visitDefault(GroovySourceAST t,int visit) {
    47          if (visit == OPENING_VISIT) {
    48              out.print("<"+ tokenNames[t.getType()] + ">");
    49          } else {
    50              out.print("</" + tokenNames[t.getType()] + ">");
    51          }
    52      }
    53  }