FileDocCategorySizeDatePackage
DataSource40.javaAPI DocGlassfish v2 API6457Fri May 04 22:36:06 BST 2007com.sun.gjc.spi.jdbc40

DataSource40

public class DataSource40 extends com.sun.gjc.spi.base.DataSource
Holds the java.sql.Connection object, which is to be passed to the application program.
author
Binod P.G
version
1.0, 02/07/31

Fields Summary
protected static final com.sun.enterprise.util.i18n.StringManager
localStrings
Constructors Summary
public DataSource40(com.sun.gjc.spi.ManagedConnectionFactory mcf, javax.resource.spi.ConnectionManager cm)
Constructs DataSource object. This is created by the ManagedConnectionFactory object.

param
mcf ManagedConnectionFactory object creating this object.
param
cm ConnectionManager object either associated with Application server or Resource Adapter.


                                                             
         
        super(mcf, cm);
Methods Summary
public booleanisWrapperFor(java.lang.Class iface)
Returns true if this either implements the interface argument or is directly or indirectly a wrapper for an object that does. Returns false otherwise. If this implements the interface then return true, else if this is a wrapper then return the result of recursively calling isWrapperFor on the wrapped object. If this does not implement the interface and is not a wrapper, return false. This method should be implemented as a low-cost operation compared to unwrap so that callers can use this method to avoid expensive unwrap calls that may fail. If this method returns true then calling unwrap with the same argument should succeed.

param
iface a Class defining an interface.
return
true if this implements the interface or directly or indirectly wraps an object that does.
throws
java.sql.SQLException if an error occurs while determining whether this is a wrapper for an object with the given interface.
since
1.6

        boolean result = false;
        try {
            Object cds = mcf.getDataSource();

            if(iface.isInstance(cds)){
                result = true;
            }else if (cds instanceof java.sql.Wrapper) {
                result = ((java.sql.Wrapper) cds).isWrapperFor(iface);
            }
        } catch (ResourceException e) {
            _logger.log(Level.WARNING, "jdbc.exc_is_wrapper", e);
            throw new SQLException(e);
        }
        return result ;
public Tunwrap(java.lang.Class iface)
Returns an object that implements the given interface to allow access to non-standard methods, or standard methods not exposed by the proxy. If the receiver implements the interface then the result is the receiver or a proxy for the receiver. If the receiver is a wrapper and the wrapped object implements the interface then the result is the wrapped object or a proxy for the wrapped object. Otherwise return the the result of calling unwrap recursively on the wrapped object or a proxy for that result. If the receiver is not a wrapper and does not implement the interface, then an SQLException is thrown.

param
iface A Class defining an interface that the result must implement.
return
an object that implements the interface. May be a proxy for the actual implementing object.
throws
java.sql.SQLException If no object found that implements the interface
since
1.6

        T result ;
        try {
            Object cds = mcf.getDataSource();

            if(iface.isInstance(cds)){
                result = iface.cast(cds);
            }else if (cds instanceof java.sql.Wrapper) {
                result = ((java.sql.Wrapper) cds).unwrap(iface);
            } else {
                String msg = localStrings.getString("jdbc.feature_not_supported");
                throw new SQLException(msg);
            }
        } catch (ResourceException e) {
            _logger.log(Level.WARNING, "jdbc.exc_unwrap", e);
            throw new SQLException(e);
        }
        return result;