configurationtokenizer.java

来自「tinyos最新版」· Java 代码 · 共 125 行

/*									tab:4
 * "Copyright (c) 2000-2003 The Regents of the University  of California.  
 * All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose, without fee, and without written agreement is
 * hereby granted, provided that the above copyright notice, the following
 * two paragraphs and the author appear in all copies of this software.
 * 
 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
 * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
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 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
 *
 * Copyright (c) 2002-2003 Intel Corporation
 * All rights reserved.
 *
 * This file is distributed under the terms in the attached INTEL-LICENSE     
 * file. If you do not find these files, copies can be found by writing to
 * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300, Berkeley, CA, 
 * 94704.  Attention:  Intel License Inquiry.
 */
/* Authors:	Phil Levis <[e-mail]>
 * Date:        Aug 8 2002
 * Desc:        Assembly program tokenizer for TinyOS VMs.
 *
 */

/**
 * @author Phil Levis <[e-mail]>
 */


package net.tinyos.script;

import java.io.*;

/**
 * This class reads in a configuration file and tokenizes it.
 */

public class ConfigurationTokenizer {
  private StreamTokenizer tokenizer;

  public ConfigurationTokenizer(Reader reader) throws IOException {
	tokenizer = new StreamTokenizer(reader);
	tokenizer.resetSyntax();
	tokenizer.eolIsSignificant(false);
	tokenizer.wordChars('A', 'Z');
	tokenizer.wordChars('a', 'z');
	tokenizer.wordChars('0', '9');
	tokenizer.wordChars('!', '!');
	tokenizer.wordChars('#', '/');
	tokenizer.wordChars(':', ';');
    tokenizer.wordChars('?', '@');
	tokenizer.wordChars('[', '_');
	tokenizer.wordChars('{', '~');
	
	tokenizer.whitespaceChars(0, 32); //Unreadable chars and whitespace
	tokenizer.whitespaceChars(127, 127); //DEL

    tokenizer.quoteChar('"');
  }

  public boolean hasMoreStatements() throws IOException{
	int type = tokenizer.nextToken();
	if (type == StreamTokenizer.TT_EOF) {
      return false;
	}
	else {
      tokenizer.pushBack();
      return true;
	}
  }
  
  public ConfStatement nextStatement() throws IOException {
    ConfStatement stmt;
    int type = tokenizer.nextToken();
    String key;
    String value;
    
    while (type != '<') {
      type = tokenizer.nextToken();
    }
    
    tokenizer.nextToken(); // this will give the confStmt's type (e.g. VM, PRIMITIVE, etc.)
    stmt = new ConfStatement(tokenizer.sval); // create the stmt with type
      
    tokenizer.nextToken();
    while (type != '>') { // get each name-value pair for this statement
      key = tokenizer.sval;
        
      type = tokenizer.nextToken(); // the equals sign
      if (type != '=') 
        throw new IOException("expecting equals sign. Statment format invalid");
        
      tokenizer.nextToken();
      value = tokenizer.sval;

      stmt.put(key, value);
      type = tokenizer.nextToken();
    } 

    return stmt;
  }

  public static void main(String[] args) {
    try {
      ConfigurationTokenizer t = new ConfigurationTokenizer(new FileReader("test.txt"));
      while (t.hasMoreStatements()) {
        ConfStatement c = t.nextStatement();
        System.out.println(c);
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}