showxpaversion.java

关于Ultraseek的一些用法,刚初学,所以都是比较简单

/* -*- mode:java; indent-tabs-mode:nil; c-basic-offset:2 -*-
 *
 *  $RCSFile$ $Revision: 1.12 $ $Date: 2006/02/01 00:20:28 $
 *
 *  Copyright (c) 2002-2003 Autonomy Corp.  All Rights Reserved.
 *  Permission to use, copy, modify, and distribute this file is hereby
 *  granted without fee, provided that the above copyright notice appear
 *  in all copies.
 */

import com.ultraseek.xpa.server.*;
import java.lang.Package;
import java.net.URL;

/** 
 * A diagnostic that displays the version information for
 * <code>xpasearch.jar</code>, Java, and other required packages.
 */
public class ShowXPAVersion {

  public static void main(String[] args) {
    ShowPackageInfo( UltraseekServer.class );    // XPA
    ShowPackageInfo( Object.class );             // Java
    ShowPackageInfo( "org.apache.commons.logging.LogFactory" );
  }

  static void ShowPackageInfo(String klassName) {
  }

  static void ShowPackageInfo(Class klass) {

    Package p = klass.getPackage();
    ClassLoader cl = klass.getClassLoader();

    System.out.println();

    // get url for the source location of the Object's class
    URL url = null;
    if (cl != null)
      url = cl.getResource(klass.getName().replace('.','/') + ".class");

    System.out.println( "Class " + klass.getName() );
    if (url != null)
      System.out.println( "Loaded from: " + url );
    if (p==null) {
      System.out.println( "No package info obtained via getPackage()." );
      return;
    }

    System.out.println( " getPackage()=                 " + 
                        klass.getPackage() );

    System.out.println( " getImplementationTitle()=     " + 
                        p.getImplementationTitle() );

    System.out.println( " getImplementationVendor()=    " + 
                        p.getImplementationVendor() );

    System.out.println( " getImplementationVersion()=   " + 
                        p.getImplementationVersion() );

    System.out.println( " getName()=                    " + 
                        p.getName() );

    System.out.println( " getSpecificationTitle()=      " +
                        p.getSpecificationTitle() );

    System.out.println( " getSpecificationVendor()=     " +
                        p.getSpecificationVendor() );

    System.out.println( " getSpecificationVersion()=    " +
                        p.getSpecificationVersion() );

    System.out.println( " isSealed()=                   " +
                        p.isSealed() );

    /* System.out.println( "isSealed(URL url)=" + 
       p.isSealed(URL url) ); */

    if (p.getName().startsWith("com.ultraseek.xpa")) {
      /* Compatible with an older specification of XPA? */
      String otherVersions[] = {
        "1.2",
        "1.3",
        "2.0",
        "2.1",
        "2.2",
        "2.3",
        "2.4"
      };
      if (url != null && url.getProtocol().equals("jar")) {
        for (int i = 0; i < otherVersions.length; i++) {
          String other = otherVersions[i];
          System.out.println( " isCompatibleWith(\"" 
                              + other + "\")=      "
                              + p.isCompatibleWith(other) );
        }
      }
    }
  }

}