environmentcheck.java

java1.6众多例子参考

    try
    {
      // NOTE: This is the old Xalan 2.0, 2.1, 2.2 version class, 
      //    is being replaced by class below
      final String XALAN2_VERSION_CLASS =
        "com.sun.org.apache.xalan.internal.processor.XSLProcessorVersion";

      Class clazz = ObjectFactory.findProviderClass(
        XALAN2_VERSION_CLASS, ObjectFactory.findClassLoader(), true);

      // Found Xalan-J 2.x, grab it's version fields
      StringBuffer buf = new StringBuffer();
      Field f = clazz.getField("S_VERSION");
      buf.append(f.get(null));

      h.put(VERSION + "xalan2x", buf.toString());
    }
    catch (Exception e2)
    {
      h.put(VERSION + "xalan2x", CLASS_NOTPRESENT);
    }
    try
    {
      // NOTE: This is the new Xalan 2.2+ version class
      final String XALAN2_2_VERSION_CLASS =
        "com.sun.org.apache.xalan.internal.Version";
      final String XALAN2_2_VERSION_METHOD = "getVersion";
      final Class noArgs[] = new Class[0];

      Class clazz = ObjectFactory.findProviderClass(
        XALAN2_2_VERSION_CLASS, ObjectFactory.findClassLoader(), true);

      Method method = clazz.getMethod(XALAN2_2_VERSION_METHOD, noArgs);
      Object returnValue = method.invoke(null, new Object[0]);

      h.put(VERSION + "xalan2_2", (String)returnValue);
    }
    catch (Exception e2)
    {
      h.put(VERSION + "xalan2_2", CLASS_NOTPRESENT);
    }
  }

  /**
   * Report product version information from common parsers.
   *
   * Looks for version info in xerces.jar/xercesImpl.jar/crimson.jar.
   *
   * //@todo actually look up version info in crimson manifest
   *
   * @param h Hashtable to put information in
   */
  protected void checkParserVersion(Hashtable h)
  {

    if (null == h)
      h = new Hashtable();

    try
    {
      final String XERCES1_VERSION_CLASS = "com.sun.org.apache.xerces.internal.framework.Version";

      Class clazz = ObjectFactory.findProviderClass(
        XERCES1_VERSION_CLASS, ObjectFactory.findClassLoader(), true);

      // Found Xerces-J 1.x, grab it's version fields
      Field f = clazz.getField("fVersion");
      String parserVersion = (String) f.get(null);

      h.put(VERSION + "xerces1", parserVersion);
    }
    catch (Exception e)
    {
      h.put(VERSION + "xerces1", CLASS_NOTPRESENT);
    }

    // Look for xerces1 and xerces2 parsers separately
    try
    {
      final String XERCES2_VERSION_CLASS = "com.sun.org.apache.xerces.internal.impl.Version";

      Class clazz = ObjectFactory.findProviderClass(
        XERCES2_VERSION_CLASS, ObjectFactory.findClassLoader(), true);

      // Found Xerces-J 2.x, grab it's version fields
      Field f = clazz.getField("fVersion");
      String parserVersion = (String) f.get(null);

      h.put(VERSION + "xerces2", parserVersion);
    }
    catch (Exception e)
    {
      h.put(VERSION + "xerces2", CLASS_NOTPRESENT);
    }

    try
    {
      final String CRIMSON_CLASS = "org.apache.crimson.parser.Parser2";

      Class clazz = ObjectFactory.findProviderClass(
        CRIMSON_CLASS, ObjectFactory.findClassLoader(), true);

      //@todo determine specific crimson version
      h.put(VERSION + "crimson", CLASS_PRESENT);
    }
    catch (Exception e)
    {
      h.put(VERSION + "crimson", CLASS_NOTPRESENT);
    }
  }

  /**
   * Report product version information from Ant.
   *
   * @param h Hashtable to put information in
   */
  protected void checkAntVersion(Hashtable h)
  {

    if (null == h)
      h = new Hashtable();

    try
    {
      final String ANT_VERSION_CLASS = "org.apache.tools.ant.Main";
      final String ANT_VERSION_METHOD = "getAntVersion"; // noArgs
      final Class noArgs[] = new Class[0];

      Class clazz = ObjectFactory.findProviderClass(
        ANT_VERSION_CLASS, ObjectFactory.findClassLoader(), true);

      Method method = clazz.getMethod(ANT_VERSION_METHOD, noArgs);
      Object returnValue = method.invoke(null, new Object[0]);

      h.put(VERSION + "ant", (String)returnValue);
    }
    catch (Exception e)
    {
      h.put(VERSION + "ant", CLASS_NOTPRESENT);
    }
  }

  /**
   * Report version info from DOM interfaces. 
   *
   * Currently distinguishes between pre-DOM level 2, the DOM 
   * level 2 working draft, the DOM level 2 final draft, 
   * and not found.
   *
   * @param h Hashtable to put information in
   */
  protected void checkDOMVersion(Hashtable h)
  {

    if (null == h)
      h = new Hashtable();

    final String DOM_LEVEL2_CLASS = "org.w3c.dom.Document";
    final String DOM_LEVEL2_METHOD = "createElementNS";  // String, String
    final String DOM_LEVEL2WD_CLASS = "org.w3c.dom.Node";
    final String DOM_LEVEL2WD_METHOD = "supported";  // String, String
    final String DOM_LEVEL2FD_CLASS = "org.w3c.dom.Node";
    final String DOM_LEVEL2FD_METHOD = "isSupported";  // String, String
    final Class twoStringArgs[] = { java.lang.String.class,
                                    java.lang.String.class };

    try
    {
      Class clazz = ObjectFactory.findProviderClass(
        DOM_LEVEL2_CLASS, ObjectFactory.findClassLoader(), true);

      Method method = clazz.getMethod(DOM_LEVEL2_METHOD, twoStringArgs);

      // If we succeeded, we have loaded interfaces from a 
      //  level 2 DOM somewhere
      h.put(VERSION + "DOM", "2.0");

      try
      {
        // Check for the working draft version, which is 
        //  commonly found, but won't work anymore
        clazz = ObjectFactory.findProviderClass(
          DOM_LEVEL2WD_CLASS, ObjectFactory.findClassLoader(), true);

        method = clazz.getMethod(DOM_LEVEL2WD_METHOD, twoStringArgs);

        h.put(ERROR + VERSION + "DOM.draftlevel", "2.0wd");
        h.put(ERROR, ERROR_FOUND);
      }
      catch (Exception e2)
      {
        try
        {
          // Check for the final draft version as well
          clazz = ObjectFactory.findProviderClass(
            DOM_LEVEL2FD_CLASS, ObjectFactory.findClassLoader(), true);

          method = clazz.getMethod(DOM_LEVEL2FD_METHOD, twoStringArgs);

          h.put(VERSION + "DOM.draftlevel", "2.0fd");
        }
        catch (Exception e3)
        {
          h.put(ERROR + VERSION + "DOM.draftlevel", "2.0unknown");
          h.put(ERROR, ERROR_FOUND);
        }
      }
    }
    catch (Exception e)
    {
      h.put(ERROR + VERSION + "DOM",
            "ERROR attempting to load DOM level 2 class: " + e.toString());
      h.put(ERROR, ERROR_FOUND);
    }

    //@todo load an actual DOM implmementation and query it as well
    //@todo load an actual DOM implmementation and check if 
    //  isNamespaceAware() == true, which is needed to parse 
    //  xsl stylesheet files into a DOM
  }

  /**
   * Report version info from SAX interfaces. 
   *
   * Currently distinguishes between SAX 2, SAX 2.0beta2, 
   * SAX1, and not found.
   *
   * @param h Hashtable to put information in
   */
  protected void checkSAXVersion(Hashtable h)
  {

    if (null == h)
      h = new Hashtable();

    final String SAX_VERSION1_CLASS = "org.xml.sax.Parser";
    final String SAX_VERSION1_METHOD = "parse";  // String
    final String SAX_VERSION2_CLASS = "org.xml.sax.XMLReader";
    final String SAX_VERSION2_METHOD = "parse";  // String
    final String SAX_VERSION2BETA_CLASSNF = "org.xml.sax.helpers.AttributesImpl";
    final String SAX_VERSION2BETA_METHODNF = "setAttributes";  // Attributes
    final Class oneStringArg[] = { java.lang.String.class };
    // Note this introduces a minor compile dependency on SAX...
    final Class attributesArg[] = { org.xml.sax.Attributes.class };

    try
    {
      // This method was only added in the final SAX 2.0 release; 
      //  see changes.html "Changes from SAX 2.0beta2 to SAX 2.0prerelease"
      Class clazz = ObjectFactory.findProviderClass(
        SAX_VERSION2BETA_CLASSNF, ObjectFactory.findClassLoader(), true);

      Method method = clazz.getMethod(SAX_VERSION2BETA_METHODNF, attributesArg);

      // If we succeeded, we have loaded interfaces from a 
      //  real, final SAX version 2.0 somewhere
      h.put(VERSION + "SAX", "2.0");
    }
    catch (Exception e)
    {
      // If we didn't find the SAX 2.0 class, look for a 2.0beta2
      h.put(ERROR + VERSION + "SAX",
            "ERROR attempting to load SAX version 2 class: " + e.toString());
      h.put(ERROR, ERROR_FOUND);
            
      try
      {
        Class clazz = ObjectFactory.findProviderClass(
          SAX_VERSION2_CLASS, ObjectFactory.findClassLoader(), true);

        Method method = clazz.getMethod(SAX_VERSION2_METHOD, oneStringArg);

        // If we succeeded, we have loaded interfaces from a 
        //  SAX version 2.0beta2 or earlier; these might work but 
        //  you should really have the final SAX 2.0 
        h.put(VERSION + "SAX-backlevel", "2.0beta2-or-earlier");
      }
      catch (Exception e2)
      {
        // If we didn't find the SAX 2.0beta2 class, look for a 1.0 one
        h.put(ERROR + VERSION + "SAX",
              "ERROR attempting to load SAX version 2 class: " + e.toString());
        h.put(ERROR, ERROR_FOUND);
          
        try
        {
          Class clazz = ObjectFactory.findProviderClass(
            SAX_VERSION1_CLASS, ObjectFactory.findClassLoader(), true);

          Method method = clazz.getMethod(SAX_VERSION1_METHOD, oneStringArg);

          // If we succeeded, we have loaded interfaces from a 
          //  SAX version 1.0 somewhere; which won't work very 
          //  well for JAXP 1.1 or beyond!
          h.put(VERSION + "SAX-backlevel", "1.0");
        }
        catch (Exception e3)
        {
          // If we didn't find the SAX 2.0 class, look for a 1.0 one
          // Note that either 1.0 or no SAX are both errors
          h.put(ERROR + VERSION + "SAX-backlevel",
                "ERROR attempting to load SAX version 1 class: " + e3.toString());
            
        }
      }
    }
  }

  /** 
   * Manual table of known .jar sizes.  
   * Only includes shipped versions of certain projects.
   * key=jarsize, value=jarname ' from ' distro name
   * Note assumption: two jars cannot have the same size!
   *
   * @see #getApparentVersion(String, long)
   */
  private static Hashtable jarVersions = new Hashtable();

  /** 
   * Static initializer for jarVersions table.  
   * Doing this just once saves time and space.
   *
   * @see #getApparentVersion(String, long)
   */
  static 
  {
    // Note: hackish Hashtable, this could use improvement
    jarVersions.put(new Long(857192), "xalan.jar from xalan-j_1_1");
    jarVersions.put(new Long(440237), "xalan.jar from xalan-j_1_2");
    jarVersions.put(new Long(436094), "xalan.jar from xalan-j_1_2_1");
    jarVersions.put(new Long(426249), "xalan.jar from xalan-j_1_2_2");
    jarVersions.put(new Long(702536), "xalan.jar from xalan-j_2_0_0");
    jarVersions.put(new Long(720930), "xalan.jar from xalan-j_2_0_1");
    jarVersions.put(new Long(732330), "xalan.jar from xalan-j_2_1_0");
    jarVersions.put(new Long(872241), "xalan.jar from xalan-j_2_2_D10");
    jarVersions.put(new Long(882739), "xalan.jar from xalan-j_2_2_D11");
    jarVersions.put(new Long(923866), "xalan.jar from xalan-j_2_2_0");
    jarVersions.put(new Long(905872), "xalan.jar from xalan-j_2_3_D1");
    jarVersions.put(new Long(906122), "xalan.jar from xalan-j_2_3_0");
    jarVersions.put(new Long(906248), "xalan.jar from xalan-j_2_3_1");
    jarVersions.put(new Long(983377), "xalan.jar from xalan-j_2_4_D1");    
    jarVersions.put(new Long(997276), "xalan.jar from xalan-j_2_4_0");
    jarVersions.put(new Long(1031036), "xalan.jar from xalan-j_2_4_1");    
    // Stop recording xalan.jar sizes as of Xalan Java 2.5.0    

    jarVersions.put(new Long(596540), "xsltc.jar from xalan-j_2_2_0");
    jarVersions.put(new Long(590247), "xsltc.jar from xalan-j_2_3_D1");
    jarVersions.put(new Long(589914), "xsltc.jar from xalan-j_2_3_0");
    jarVersions.put(new Long(589915), "xsltc.jar from xalan-j_2_3_1");
    jarVersions.put(new Long(1306667), "xsltc.jar from xalan-j_2_4_D1");     
    jarVersions.put(new Long(1328227), "xsltc.jar from xalan-j_2_4_0");
    jarVersions.put(new Long(1344009), "xsltc.jar from xalan-j_2_4_1");
    jarVersions.put(new Long(1348361), "xsltc.jar from xalan-j_2_5_D1");    
    // Stop recording xsltc.jar sizes as of Xalan Java 2.5.0

    jarVersions.put(new Long(1268634), "xsltc.jar-bundled from xalan-j_2_3_0");

    jarVersions.put(new Long(100196), "xml-apis.jar from xalan-j_2_2_0 or xalan-j_2_3_D1");
    jarVersions.put(new Long(108484), "xml-apis.jar from xalan-j_2_3_0, or xalan-j_2_3_1 from xml-commons-1.0.b2");
    jarVersions.put(new Long(109049), "xml-apis.jar from xalan-j_2_4_0 from xml-commons RIVERCOURT1 branch");
    jarVersions.put(new Long(113749), "xml-apis.jar from xalan-j_2_4_1 from factoryfinder-build of xml-commons RIVERCOURT1");
    jarVersions.put(new Long(124704), "xml-apis.jar from tck-jaxp-1_2_0 branch of xml-commons");
    jarVersions.put(new Long(124724), "xml-apis.jar from tck-jaxp-1_2_0 branch of xml-commons, tag: xml-commons-external_1_2_01");
    jarVersions.put(new Long(194205), "xml-apis.jar from head branch of xml-commons, tag: xml-commons-external_1_3_02");

    // If the below were more common I would update it to report 
    //  errors better; but this is so old hardly anyone has it
    jarVersions.put(new Long(424490), "xalan.jar from Xerces Tools releases - ERROR:DO NOT USE!");

    jarVersions.put(new Long(1591855), "xerces.jar from xalan-j_1_1 from xerces-1...");
    jarVersions.put(new Long(1498679), "xerces.jar from xalan-j_1_2 from xerces-1_2_0.bin");
    jarVersions.put(new Long(1484896), "xerces.jar from xalan-j_1_2_1 from xerces-1_2_1.bin");
    jarVersions.put(new Long(804460),  "xerces.jar from xalan-j_1_2_2 from xerces-1_2_2.bin");
    jarVersions.put(new Long(1499244), "xerces.jar from xalan-j_2_0_0 from xerces-1_2_3.bin");
    jarVersions.put(new Long(1605266), "xerces.jar from xalan-j_2_0_1 from xerces-1_3_0.bin");
    jarVersions.put(new Long(904030), "xerces.jar from xalan-j_2_1_0 from xerces-1_4.bin");
    jarVersions.put(new Long(904030), "xerces.jar from xerces-1_4_0.bin");
    jarVersions.put(new Long(1802885), "xerces.jar from xerces-1_4_2.bin");
    jarVersions.put(new Long(1734594), "xerces.jar from Xerces-J-bin.2.0.0.beta3");
    jarVersions.put(new Long(1808883), "xerces.jar from xalan-j_2_2_D10,D11,D12 or xerces-1_4_3.bin");
    jarVersions.put(new Long(1812019), "xerces.jar from xalan-j_2_2_0");
    jarVersions.put(new Long(1720292), "xercesImpl.jar from xalan-j_2_3_D1");
    jarVersions.put(new Long(1730053), "xercesImpl.jar from xalan-j_2_3_0 or xalan-j_2_3_1 from xerces-2_0_0");
    jarVersions.put(new Long(1728861), "xercesImpl.jar from xalan-j_2_4_D1 from xerces-2_0_1");    
    jarVersions.put(new Long(972027), "xercesImpl.jar from xalan-j_2_4_0 from xerces-2_1");
    jarVersions.put(new Long(831587), "xercesImpl.jar from xalan-j_2_4_1 from xerces-2_2"); 
    jarVersions.put(new Long(891817), "xercesImpl.jar from xalan-j_2_5_D1 from xerces-2_3");  
    jarVersions.put(new Long(895924), "xercesImpl.jar from xerces-2_4");
    jarVersions.put(new Long(1010806), "xercesImpl.jar from Xerces-J-bin.2.6.2"); 
    jarVersions.put(new Long(1203860), "xercesImpl.jar from Xerces-J-bin.2.7.1");                           

    jarVersions.put(new Long(37485), "xalanj1compat.jar from xalan-j_2_0_0");
    jarVersions.put(new Long(38100), "xalanj1compat.jar from xalan-j_2_0_1");

    jarVersions.put(new Long(18779), "xalanservlet.jar from xalan-j_2_0_0");
    jarVersions.put(new Long(21453), "xalanservlet.jar from xalan-j_2_0_1");
    jarVersions.put(new Long(24826), "xalanservlet.jar from xalan-j_2_3_1 or xalan-j_2_4_1");    
    jarVersions.put(new Long(24831), "xalanservlet.jar from xalan-j_2_4_1");
    // Stop recording xalanservlet.jar sizes as of Xalan Java 2.5.0; now a .war file
    
    // For those who've downloaded JAXP from sun
    jarVersions.put(new Long(5618), "jaxp.jar from jaxp1.0.1");
    jarVersions.put(new Long(136133), "parser.jar from jaxp1.0.1");
    jarVersions.put(new Long(28404), "jaxp.jar from jaxp-1.1");
    jarVersions.put(new Long(187162), "crimson.jar from jaxp-1.1");
    jarVersions.put(new Long(801714), "xalan.jar from jaxp-1.1");
    jarVersions.put(new Long(196399), "crimson.jar from crimson-1.1.1");
    jarVersions.put(new Long(33323), "jaxp.jar from crimson-1.1.1 or jakarta-ant-1.4.1b1");
    jarVersions.put(new Long(152717), "crimson.jar from crimson-1.1.2beta2");
    jarVersions.put(new Long(88143), "xml-apis.jar from crimson-1.1.2beta2");
    jarVersions.put(new Long(206384), "crimson.jar from crimson-1.1.3 or jakarta-ant-1.4.1b1");

    // jakarta-ant: since many people use ant these days
    jarVersions.put(new Long(136198), "parser.jar from jakarta-ant-1.3 or 1.2");
    jarVersions.put(new Long(5537), "jaxp.jar from jakarta-ant-1.3 or 1.2");
  }

  /** Simple PrintWriter we send output to; defaults to System.out.  */
  protected PrintWriter outWriter = new PrintWriter(System.out, true);

  /**
   * Bottleneck output: calls outWriter.println(s).  
   * @param s String to print
   */
  protected void logMsg(String s)
  {
    outWriter.println(s);
  }
}