PackageNameGetter.java :  » UML » jrefactory » net » sourceforge » jrefactory » query » Java Open Source

package net.sourceforge.jrefactory.query;

import java.io.File;
import net.sourceforge.jrefactory.ast.ASTName;
import net.sourceforge.jrefactory.ast.SimpleNode;
import net.sourceforge.jrefactory.ast.ASTPackageDeclaration;
import net.sourceforge.jrefactory.factory.FileParserFactory;
import net.sourceforge.jrefactory.factory.ParserFactory;
import org.acm.seguin.awt.ExceptionPrinter;

/**
 *  Gets the package name
 *
 *@author     Chris Seguin
 *@created    November 23, 1999
 */
public class PackageNameGetter {
  /**
   *  Return the package name
   *
   *@param  initialDir  Description of Parameter
   *@param  filename    Description of Parameter
   *@return             the package name
   */
  public static ASTName query(File initialDir, String filename) {
    //  Create a factory to get a root
    File inputFile = new File(initialDir, filename);
    ParserFactory factory = new FileParserFactory(inputFile);
    SimpleNode root = factory.getAbstractSyntaxTree(false, ExceptionPrinter.getInstance());

    return query(root);
  }


  /**
   *  Gets the package name
   *
   *@param  root  the syntax tree
   *@return       the name of the package or null if there is none
   */
  public static ASTName query(SimpleNode root) {
    if (root == null) {
      System.out.println("Unable to find the file!");
      return null;
    }

    SimpleNode first = (SimpleNode) root.jjtGetFirstChild();
    if (first instanceof ASTPackageDeclaration) {
      return (ASTName) first.jjtGetFirstChild();
    }

    return null;
  }
}