Is Java Identifier and get Java Identifier : Identifier « Reflection « Java

1. Java
2. Reflection
3. Identifier

Is Java Identifier and get Java Identifier

     

/*
    GNU LESSER GENERAL PUBLIC LICENSE
    Copyright (C) 2006 The Lobo Project

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Contact info: lobochief@users.sourceforge.net
*/

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;

public class Strings
{
  private static final MessageDigest MESSAGE_DIGEST;
  public static final String[] EMPTY_ARRAY = new String[0];

  static {
      MessageDigest md;
      try {
          md = MessageDigest.getInstance("MD5");
      } catch(NoSuchAlgorithmException err) {
        throw new IllegalStateException();
      }
      MESSAGE_DIGEST = md;
  }

  public static boolean isBlank(String text) {
      return text == null || "".equals(text);
  }
  
  public static int countLines(String text) 
  {
    int startIdx = 0;
    int lineCount = 1;
    for(;;) 
    {
      int lbIdx = text.indexOf('\n', startIdx);
      if(lbIdx == -1) 
      {
        break;
      }
      lineCount++;
      startIdx = lbIdx + 1;
    }
    return lineCount;
  }

  public static boolean isJavaIdentifier(String id) 
  {
    if(id == null) 
    {
      return false;
    }
    int len = id.length();
    if(len == 0) 
    {
      return false;
    }
    if(!Character.isJavaIdentifierStart(id.charAt(0))) 
    {
      return false;
    }
    for(int i = 1; i < len; i++) 
    {
      if(!Character.isJavaIdentifierPart(id.charAt(i))) 
      {
        return false;
      }
    }
    return true;
  }
  
  public static String getJavaStringLiteral(String text) {
      StringBuffer buf = new StringBuffer();
      buf.append('"');
      int len = text.length();
      for(int i = 0; i < len; i++) {
          char ch = text.charAt(i);
          switch(ch) {
          case '\\':
              buf.append("\\\\");
              break;
          case '\n':
              buf.append("\\n");
              break;
          case '\r':
              buf.append("\\r");
              break;
          case '\t':
              buf.append("\\t");
              break;
          case '"':
              buf.append("\\\"");
              break;
          default:
              buf.append(ch);
            break;
          }
      }
      buf.append('"');
      return buf.toString();
  }
  
  public static String getJavaIdentifier(String candidateID) {
    int len = candidateID.length();
    StringBuffer buf = new StringBuffer();
    for(int i = 0; i < len; i++) 
    {
        char ch = candidateID.charAt(i);
      boolean good = i == 0 ? Character.isJavaIdentifierStart(ch) : Character.isJavaIdentifierPart(ch);
      if(good) 
      {
          buf.append(ch);
      }
      else {
          buf.append('_');
      }
    }
    return buf.toString();      
  }
  
}

   
    
    
    
    
  

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