Parser.java

public class Parser {
   
  private Parser successor;
   
  public void parse(String fileName){
    if ( getSuccessor() != null ){
      getSuccessor().parse(fileName);
    }
    else{
      System.out.println("Unable to find the correct parser for the file: "+fileName);
    }
  }
   
  protected boolean canHandleFile(String fileName, String format){
    return (fileName == null) || (fileName.endsWith(format));
         
  }
 
  Parser getSuccessor() {
    return successor;
  }
 
  void setSuccessor(Parser successor) {
    this.successor = successor;
  }
}