Mike,
thank you for your patience and effort trying to resolve this issue.
I just changed the essential parts to reproduce the error.
Here's the setter in CasesJdbcDAO:
public void setDataSource(JDBCDataSource dataSource) {
if (log.isDebugEnabled()) log.debug("setting dataSource in casesDAO");
this.ds = dataSource;
//the dataSource has to be updated after the bean has been injected
this.setDataSource(this.ds.getDs());
}
and the correlating snipplet of the faces-config.xml configuration file:
<managed-bean>
<description>this one retrieves the cases</description>
<managed-bean-name>casesDAOBean</managed-bean-name>
<managed-bean-class>com.edegger.dao.springJDBC.CasesJdbcDAO</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
<managed-property>
<property-name>dataSource</property-name>
<value>#{jdbcDataSourceBean}</value>
</managed-property>
</managed-bean>
Since the field ds is only used within the class CasesJdbcDAO, I don't need an
getter for this property.
And finally the signature of the class is:
public class CasesJdbcDAO extends JdbcDaoSupport implements CasesDAO {
whereas CasesDAO is the interface defining a methode to get all the cases as a
list.
With this configuration, I'm getting the 'javax.servlet.jsp.el.ELException:
Attempt to coerce a value of type "com.edegger.dao.springJDBC.JDBCDataSource"
to type "javax.sql.DataSource"' exception.
To get rid off this exception, I'll need to apply the following chances:
public void setDs(JDBCDataSource dataSource) {
if (log.isDebugEnabled()) log.debug("setting dataSource in casesDAO");
this.ds = dataSource;
//the dataSource has to be updated after the bean has been injected
this.setDataSource(this.ds.getDs());
}
and the correlating snipplet of the faces-config.xml configuration file:
<managed-bean>
<description>this one retrieves the cases</description>
<managed-bean-name>casesDAOBean</managed-bean-name>
<managed-bean-class>com.edegger.dao.springJDBC.CasesJdbcDAO</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
<managed-property>
<property-name>ds</property-name>
<value>#{jdbcDataSourceBean}</value>
</managed-property>
</managed-bean>
The signature stays the same.
I know something's not adding up - but I can't explain it.
Enjoy,
Kurt
Quoting Mike Kienenberger <[EMAIL PROTECTED]>:
> Kurt, what does both your setter and getter code and method signatures
> look like on CasesJdbcDAO when you're getting this error?
>
> 'javax.servlet.jsp.el.ELException: Attempt to coerce a value of type
> "JDBCDataSource" to type "javax.sql.DataSource"' indicates an attempt
> to inject a JDBCDataSource into a value binding expecting a
> javax.sql.DataSource.
>
> Something's not adding up here.
>
> On 12/5/05, Kurt Edegger <[EMAIL PROTECTED]> wrote:
> > Hi Mike,
> >
> > thank you for your help, but I don't think that your answer is correct.
> > We are talking about two different classes. The first one is
> > CasesJdbcDAO with the setter taking an JDBCDataSource Object and the
> > second on is the JDBCDataSource class having a getDs() method to return
> > the actual javax.sql.DataSource object. To clearify: The JDBCDataSource
> > object is injected to CasesJdbcDAO using the setter in CasesJdbcDAO
> > which takes the correct type of JDBCDataSource.
> > I don't think this is an issue of a misscasted type since it works if
> > the field in CasesJdbcDAO (marked as [1] in my former postings) isn't
> > named 'dataSource'. In that case the JSF implementation seems to
> > interpret the name as a type and causing the exception. In the case it
> > isn't named 'dataSource' (e.g. 'ds' in my example) the injection is done
> > without any problems.
> >
> > I'm appreciating your help and thoughts.
> >
> > Kurt
> >
> >
> >
> > on 12/5/2005 8:54 AM Mike Kienenberger stated:
> > > Your setter and getter return different types.
> > >
> > > public DataSource getDs()
> > >
> > > needs to be
> > >
> > > public JDBCDataSource getDs() {
> > >
> > > On 12/2/05, Kurt Edegger <[EMAIL PROTECTED]> wrote:
> > >
> > >>Hi Mike,
> > >>
> > >>thank you for your response.
> > >>
> > >>on 12/2/2005 7:30 AM Mike Kienenberger stated:
> > >> > Can you post the setter method for ds in CasesJdbcDAO?
> > >>
> > >>Here are the crucial parts of CasesJdbcDAO:
> > >>/* the field definition [1]*/
> > >>private JDBCDataSource ds;
> > >>
> > >>/* the setter*/
> > >>public void setDs(JDBCDataSource dataSource) {
> > >> this.ds = dataSource;
> > >> this.setDataSource(this.ds.getDs());
> > >>}
> > >>
> > >> > Also can you post the class definition line for JDBCDataSource?
> > >>The JDBCDataSource class is very simple and just holds an
> > >>javax.sql.DataSource object. Here are the interesting parts:
> > >>
> > >>/*the class definition */
> > >>public class JDBCDataSource{
> > >>
> > >> /*the javax.sql.DataSource*/
> > >> private DataSource ds;
> > >> private String jndiLookup;
> > >>...
> > >>
> > >> public DataSource getDs() {
> > >> doLookup();
> > >> return ds;
> > >> }
> > >>
> > >>}
> > >>
> > >>
> > >>The issue again: If I change the name of the field in CasesJdbcDAO at
> > >>position [1] to dataSource, and adjust the injection in faces-config.xml
> > >>accordingly the application crashes with the stated exception.
> > >>
> > >>Any ideas?
> > >>
> > >> Kurt
> > >>
> >
> >
>
