environmentcheck.java

来自「java jdk 1.4的源码」· Java 代码 · 共 1,376 行 · 第 1/4 页

   * @param jars array of .jar base filenames to look for
   *
   * @return Vector of Hashtables filled with info about found .jars
   * @see #jarNames
   * @see #logFoundJars(Vector, String)
   * @see #appendFoundJars(Node, Document, Vector, String )
   * @see #getApparentVersion(String, long)
   */
  protected Vector checkPathForJars(String cp, String[] jars)
  {

    if ((null == cp) || (null == jars) || (0 == cp.length())
            || (0 == jars.length))
      return null;

    Vector v = new Vector();
    StringTokenizer st = new StringTokenizer(cp, File.pathSeparator);

    while (st.hasMoreTokens())
    {

      // Look at each classpath entry for each of our requested jarNames
      String filename = st.nextToken();

      for (int i = 0; i < jars.length; i++)
      {
        if (filename.indexOf(jars[i]) > -1)
        {
          File f = new File(filename);

          if (f.exists())
          {

            // If any requested jarName exists, report on 
            //  the details of that .jar file
            try
            {
              Hashtable h = new Hashtable(2);
              // Note "-" char is looked for in appendFoundJars
              h.put(jars[i] + "-path", f.getAbsolutePath());
              h.put(jars[i] + "-apparent.version",
                    getApparentVersion(jars[i], f.length()));
              v.addElement(h);
            }
            catch (Exception e)
            {

              /* no-op, don't add it  */
            }
          }
          else
          {
            Hashtable h = new Hashtable(2);
            // Note "-" char is looked for in appendFoundJars
            h.put(jars[i] + "-path", WARNING + " Classpath entry: " 
                  + filename + " does not exist");
            h.put(jars[i] + "-apparent.version", CLASS_NOTPRESENT);
            v.addElement(h);
          }
        }
      }
    }

    return v;
  }

  /**
   * Cheap-o method to determine the product version of a .jar.   
   *
   * Currently does a lookup into a local table of some recent 
   * shipped Xalan builds to determine where the .jar probably 
   * came from.  Note that if you recompile Xalan or Xerces 
   * yourself this will likely report a potential error, since 
   * we can't certify builds other than the ones we ship.
   * Only reports against selected posted Xalan-J builds.
   *
   * //@todo actually look up version info in manifests
   *
   * @param jarName base filename of the .jarfile
   * @param jarSize size of the .jarfile
   *
   * @return String describing where the .jar file probably 
   * came from
   */
  protected String getApparentVersion(String jarName, long jarSize)
  {
    // If we found a matching size and it's for our 
    //  jar, then return it's description
    // Lookup in static jarVersions Hashtable
    String foundSize = (String) jarVersions.get(new Long(jarSize));

    if ((null != foundSize) && (foundSize.startsWith(jarName)))
    {
      return foundSize;
    }
    else
    {
      if ("xerces.jar".equalsIgnoreCase(jarName)
              || "xercesImpl.jar".equalsIgnoreCase(jarName)
              || "xalan.jar".equalsIgnoreCase(jarName))
      {

        // For xalan.jar and xerces.jar/xercesImpl.jar, which we ship together:
        // The jar is not from a shipped copy of xalan-j, so 
        //  it's up to the user to ensure that it's compatible
        return jarName + " " + WARNING + CLASS_PRESENT;
      }
      else
      {

        // Otherwise, it's just a jar we don't have the version info calculated for
        return jarName + " " + CLASS_PRESENT;
      }
    }
  }

  /**
   * Report version information about JAXP interfaces.
   *
   * Currently distinguishes between JAXP 1.0.1 and JAXP 1.1, 
   * and not found; only tests the interfaces, and does not 
   * check for reference implementation versions.
   *
   * @param h Hashtable to put information in
   */
  protected void checkJAXPVersion(Hashtable h)
  {

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

    final Class noArgs[] = new Class[0];
    Class clazz = null;

    try
    {
      final String JAXP1_CLASS = "javax.xml.parsers.DocumentBuilder";
      final String JAXP11_METHOD = "getDOMImplementation";

      clazz = classForName(JAXP1_CLASS);

      Method method = clazz.getMethod(JAXP11_METHOD, noArgs);

      // If we succeeded, we at least have JAXP 1.1 available
      h.put(VERSION + "JAXP", "1.1");
    }
    catch (Exception e)
    {
      if (null != clazz)
      {

        // We must have found the class itself, just not the 
        //  method, so we (probably) have JAXP 1.0.1
        h.put(ERROR + VERSION + "JAXP", "1.0.1");
        h.put(ERROR, ERROR_FOUND);
      }
      else
      {
        // We couldn't even find the class, and don't have 
        //  any JAXP support at all, or only have the 
        //  transform half of it
        h.put(ERROR + VERSION + "JAXP", CLASS_NOTPRESENT);
        h.put(ERROR, ERROR_FOUND);
      }
    }
  }

  /**
   * Report product version information from Xalan-J.
   *
   * Looks for version info in xalan.jar from Xalan-J products.
   *
   * @param h Hashtable to put information in
   */
  protected void checkProcessorVersion(Hashtable h)
  {

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

    try
    {
      final String XALAN1_VERSION_CLASS =
        "org.apache.xalan.xslt.XSLProcessorVersion";
      Class clazz = classForName(XALAN1_VERSION_CLASS);

      // Found Xalan-J 1.x, grab it's version fields
      StringBuffer buf = new StringBuffer();
      Field f = clazz.getField("PRODUCT");

      buf.append(f.get(null));
      buf.append(';');

      f = clazz.getField("LANGUAGE");

      buf.append(f.get(null));
      buf.append(';');

      f = clazz.getField("S_VERSION");

      buf.append(f.get(null));
      buf.append(';');
      h.put(VERSION + "xalan1", buf.toString());
    }
    catch (Exception e1)
    {
      h.put(VERSION + "xalan1", CLASS_NOTPRESENT);
    }

    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 =
        "org.apache.xalan.processor.XSLProcessorVersion";
      Class clazz = classForName(XALAN2_VERSION_CLASS);

      // 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 =
        "org.apache.xalan.Version";
      final String XALAN2_2_VERSION_METHOD = "getVersion";
      final Class noArgs[] = new Class[0];

      Class clazz = classForName(XALAN2_2_VERSION_CLASS);
      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 = "org.apache.xerces.framework.Version";
      Class clazz = classForName(XERCES1_VERSION_CLASS);

      // 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 = "org.apache.xerces.impl.Version";
      Class clazz = classForName(XERCES2_VERSION_CLASS);

      // 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 = classForName(CRIMSON_CLASS);

      //@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 = classForName(ANT_VERSION_CLASS);
      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,