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FuncSystemProperty.javaAPI DocJava SE 5 API5611Fri Aug 26 14:56:08 BST 2005com.sun.org.apache.xpath.internal.functions

FuncSystemProperty

public class FuncSystemProperty extends FunctionOneArg
Execute the SystemProperty() function.
xsl.usage
advanced

Fields Summary
static String
XSLT_PROPERTIES
The path/filename of the property file: XSLTInfo.properties Maintenance note: see also com.sun.org.apache.xalan.internal.processor.TransformerFactoryImpl.XSLT_PROPERTIES
Constructors Summary
Methods Summary
public com.sun.org.apache.xpath.internal.objects.XObjectexecute(com.sun.org.apache.xpath.internal.XPathContext xctxt)
Execute the function. The function must return a valid object.

param
xctxt The current execution context.
return
A valid XObject.
throws
javax.xml.transform.TransformerException


                            
       
  

    String fullName = m_arg0.execute(xctxt).str();
    int indexOfNSSep = fullName.indexOf(':");
    String result;
    String propName = "";

    // List of properties where the name of the
    // property argument is to be looked for.
    Properties xsltInfo = new Properties();

    loadPropertyFile(XSLT_PROPERTIES, xsltInfo);

    if (indexOfNSSep > 0)
    {
      String prefix = (indexOfNSSep >= 0)
                      ? fullName.substring(0, indexOfNSSep) : "";
      String namespace;

      namespace = xctxt.getNamespaceContext().getNamespaceForPrefix(prefix);
      propName = (indexOfNSSep < 0)
                 ? fullName : fullName.substring(indexOfNSSep + 1);

      if (namespace.startsWith("http://www.w3.org/XSL/Transform")
              || namespace.equals("http://www.w3.org/1999/XSL/Transform"))
      {
        result = xsltInfo.getProperty(propName);

        if (null == result)
        {
          warn(xctxt, XPATHErrorResources.WG_PROPERTY_NOT_SUPPORTED,
               new Object[]{ fullName });  //"XSL Property not supported: "+fullName);

          return XString.EMPTYSTRING;
        }
      }
      else
      {
        warn(xctxt, XPATHErrorResources.WG_DONT_DO_ANYTHING_WITH_NS,
             new Object[]{ namespace,
                           fullName });  //"Don't currently do anything with namespace "+namespace+" in property: "+fullName);

        try
        {
          result = System.getProperty(propName);

          if (null == result)
          {

            // result = System.getenv(propName);
            return XString.EMPTYSTRING;
          }
        }
        catch (SecurityException se)
        {
          warn(xctxt, XPATHErrorResources.WG_SECURITY_EXCEPTION,
               new Object[]{ fullName });  //"SecurityException when trying to access XSL system property: "+fullName);

          return XString.EMPTYSTRING;
        }
      }
    }
    else
    {
      try
      {
        result = System.getProperty(fullName);

        if (null == result)
        {

          // result = System.getenv(fullName);
          return XString.EMPTYSTRING;
        }
      }
      catch (SecurityException se)
      {
        warn(xctxt, XPATHErrorResources.WG_SECURITY_EXCEPTION,
             new Object[]{ fullName });  //"SecurityException when trying to access XSL system property: "+fullName);

        return XString.EMPTYSTRING;
      }
    }

    if (propName.equals("version") && result.length() > 0)
    {
      try
      {
        // Needs to return the version number of the spec we conform to.
        return new XNumber(1.0);
      }
      catch (Exception ex)
      {
        return new XString(result);
      }
    }
    else
      return new XString(result);
public voidloadPropertyFile(java.lang.String file, java.util.Properties target)
Retrieve a propery bundle from a specified file

param
file The string name of the property file. The name should already be fully qualified as path/filename
param
target The target property bag the file will be placed into.

    try
    {
      // Use SecuritySupport class to provide priveleged access to property file
      SecuritySupport ss = SecuritySupport.getInstance();

      InputStream is = ss.getResourceAsStream(ObjectFactory.findClassLoader(),
                                              file);

      // get a buffered version
      BufferedInputStream bis = new BufferedInputStream(is);

      target.load(bis);  // and load up the property bag from this
      bis.close();  // close out after reading
    }
    catch (Exception ex)
    {
      // ex.printStackTrace();
      throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException(ex);
    }