empire-db-jakarta-faces/src/main/java/org/apache/empire/jakarta/app/DBELResolver.java [38:191]:
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public class DBELResolver extends ELResolver
{
    private static final Logger log = LoggerFactory.getLogger(DBELResolver.class);
    
    @Override
    public Class<?> getCommonPropertyType(ELContext context, Object base)
    {
        if (base==null)
            log.warn("DBELResolver:getCommonPropertyType is not implemented!");
        return null;
    }

    @Override
    public Class<?> getType(ELContext context, Object base, Object property)
    {
        if ((base instanceof DBRowSet) ||
            (base instanceof DBDatabase) ||
            (base==null && property.equals("db")))
            log.warn("DBELResolver:getType is not implemented!");
        return null;
    }

    @Override
    public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext arg0, Object arg1)
    {
        log.warn("DBELResolver:getFeatureDescriptors is not implemented!");
        return null;
    }

    @Override
    public Object getValue(ELContext context, Object base, Object property)
    {
        // Resolve database, table/view or column
        if (base instanceof DBRowSet)
        {   // Find matching column
            String name = StringUtils.toString(property);
            DBColumnExpr column = ((DBRowSet)base).getColumn(name);
            if (column==null)
                column = findExpressionField(base, name); 
            if (column!=null)
                context.setPropertyResolved(true); 
            else
                log.error("ELResolver error: Column '{}' cannot be resolved for table/view '{}'.", name.toUpperCase(), ((DBRowSet)base).getName());
            // done
            return column;
        }
        else if (base instanceof DBDatabase)
        {   // Lookup RowSet
            String   name = StringUtils.toString(property);
            DBRowSet rset = ((DBDatabase)base).getRowSet(name);
            if (rset==null)
                rset = ((DBDatabase)base).getRowSetByAlias(name); // 2nd chance
            if (rset!=null)
                context.setPropertyResolved(true);
            else
                log.error("ELResolver error: Table/View '{}' cannot be resolved.", name.toUpperCase());
            // done
            return rset;
        }
        else if (base instanceof RecordData)
        {   // Lookup RowSet           
            String field= StringUtils.toString(property);
            // field must start with a capital Letter
            if (field==null || field.length()==0 || field.charAt(0)<'A' || field.charAt(0)>'Z')
                return null;
            // try to find field
            int index = ((RecordData)base).getFieldIndex(field);
            if (index<0)
            {   // not a field, it may be a property
                log.warn("ELResolver warning: field '{}' not found in record .", field);
                // not resolved, continue search
                return null; 
            }
            // Found! Return field value.
            context.setPropertyResolved(true);
            return ((RecordData)base).getValue(index);
        }
        else if (base==null)
        {   // LookupDatabase
            String name = StringUtils.toString(property);
            DBDatabase db = DBDatabase.findByIdentifier(name);
            if (db!=null)
                context.setPropertyResolved(true);
            // done
            return db;
        }
        return null;
    }
    
    public static DBColumnExpr findExpressionField(Object rowset, String property)
    {
        Class<?> c = rowset.getClass();
        try
        {   // Find a matching field name
            Field f = c.getField(property);
            if (f==null)
                return null;
            Object v = f.get(rowset);
            if (v==null)
            {   // invalid data type 
                log.error("ELResolver error: Field '{}.{}' is null.", c.getSimpleName(), property);
                return null;
            }    
            if (!(v instanceof DBColumnExpr))
            {   // invalid data type 
                log.error("ELResolver error: Field '{}.{}' is not a DBColumnExpr.", c.getSimpleName(), property);
                return null;
            }    
            return ((DBColumnExpr)v);
        }
        catch (SecurityException e)
        {
            log.error("ELResolver error: Unable to access field "+c.getSimpleName()+"."+property, e);
            return null;
        }
        catch (NoSuchFieldException e)
        {
            return null;
        }
        catch (IllegalArgumentException e)
        {
            log.error("ELResolver error: Unable to access field "+c.getSimpleName()+"."+property, e);
            return null;
        }
        catch (IllegalAccessException e)
        {
            log.error("ELResolver error: Unable to access field "+c.getSimpleName()+"."+property, e);
            return null;
        }
    }

    @Override
    public boolean isReadOnly(ELContext context, Object base, Object property)
    {
        // is it our's?
        if ((base instanceof DBRowSet) ||
            (base instanceof DBDatabase) ||
            (base==null && property.equals("db")))
        {   // read only
            log.info("ELResolver: property {} is read only.", property);
            return true;
        }
        // not our business
        return false;
    }

    @Override
    public void setValue(ELContext context, Object base, Object property, Object value)
    {
        if (isReadOnly(context, base, property))
        {
            RuntimeException e = new NotSupportedException(this, "setValue");
            FacesContext.getCurrentInstance().getExternalContext().log(e.getMessage(), e);
            throw e;
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empire-db-jsf2/src/main/java/org/apache/empire/jsf2/app/DBELResolver.java [38:191]:
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public class DBELResolver extends ELResolver
{
    private static final Logger log = LoggerFactory.getLogger(DBELResolver.class);
    
    @Override
    public Class<?> getCommonPropertyType(ELContext context, Object base)
    {
        if (base==null)
            log.warn("DBELResolver:getCommonPropertyType is not implemented!");
        return null;
    }

    @Override
    public Class<?> getType(ELContext context, Object base, Object property)
    {
        if ((base instanceof DBRowSet) ||
            (base instanceof DBDatabase) ||
            (base==null && property.equals("db")))
            log.warn("DBELResolver:getType is not implemented!");
        return null;
    }

    @Override
    public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext arg0, Object arg1)
    {
        log.warn("DBELResolver:getFeatureDescriptors is not implemented!");
        return null;
    }

    @Override
    public Object getValue(ELContext context, Object base, Object property)
    {
        // Resolve database, table/view or column
        if (base instanceof DBRowSet)
        {   // Find matching column
            String name = StringUtils.toString(property);
            DBColumnExpr column = ((DBRowSet)base).getColumn(name);
            if (column==null)
                column = findExpressionField(base, name); 
            if (column!=null)
                context.setPropertyResolved(true); 
            else
                log.error("ELResolver error: Column '{}' cannot be resolved for table/view '{}'.", name.toUpperCase(), ((DBRowSet)base).getName());
            // done
            return column;
        }
        else if (base instanceof DBDatabase)
        {   // Lookup RowSet
            String   name = StringUtils.toString(property);
            DBRowSet rset = ((DBDatabase)base).getRowSet(name);
            if (rset==null)
                rset = ((DBDatabase)base).getRowSetByAlias(name); // 2nd chance
            if (rset!=null)
                context.setPropertyResolved(true);
            else
                log.error("ELResolver error: Table/View '{}' cannot be resolved.", name.toUpperCase());
            // done
            return rset;
        }
        else if (base instanceof RecordData)
        {   // Lookup RowSet           
            String field= StringUtils.toString(property);
            // field must start with a capital Letter
            if (field==null || field.length()==0 || field.charAt(0)<'A' || field.charAt(0)>'Z')
                return null;
            // try to find field
            int index = ((RecordData)base).getFieldIndex(field);
            if (index<0)
            {   // not a field, it may be a property
                log.warn("ELResolver warning: field '{}' not found in record .", field);
                // not resolved, continue search
                return null; 
            }
            // Found! Return field value.
            context.setPropertyResolved(true);
            return ((RecordData)base).getValue(index);
        }
        else if (base==null)
        {   // LookupDatabase
            String name = StringUtils.toString(property);
            DBDatabase db = DBDatabase.findByIdentifier(name);
            if (db!=null)
                context.setPropertyResolved(true);
            // done
            return db;
        }
        return null;
    }
    
    public static DBColumnExpr findExpressionField(Object rowset, String property)
    {
        Class<?> c = rowset.getClass();
        try
        {   // Find a matching field name
            Field f = c.getField(property);
            if (f==null)
                return null;
            Object v = f.get(rowset);
            if (v==null)
            {   // invalid data type 
                log.error("ELResolver error: Field '{}.{}' is null.", c.getSimpleName(), property);
                return null;
            }    
            if (!(v instanceof DBColumnExpr))
            {   // invalid data type 
                log.error("ELResolver error: Field '{}.{}' is not a DBColumnExpr.", c.getSimpleName(), property);
                return null;
            }    
            return ((DBColumnExpr)v);
        }
        catch (SecurityException e)
        {
            log.error("ELResolver error: Unable to access field "+c.getSimpleName()+"."+property, e);
            return null;
        }
        catch (NoSuchFieldException e)
        {
            return null;
        }
        catch (IllegalArgumentException e)
        {
            log.error("ELResolver error: Unable to access field "+c.getSimpleName()+"."+property, e);
            return null;
        }
        catch (IllegalAccessException e)
        {
            log.error("ELResolver error: Unable to access field "+c.getSimpleName()+"."+property, e);
            return null;
        }
    }

    @Override
    public boolean isReadOnly(ELContext context, Object base, Object property)
    {
        // is it our's?
        if ((base instanceof DBRowSet) ||
            (base instanceof DBDatabase) ||
            (base==null && property.equals("db")))
        {   // read only
            log.info("ELResolver: property {} is read only.", property);
            return true;
        }
        // not our business
        return false;
    }

    @Override
    public void setValue(ELContext context, Object base, Object property, Object value)
    {
        if (isReadOnly(context, base, property))
        {
            RuntimeException e = new NotSupportedException(this, "setValue");
            FacesContext.getCurrentInstance().getExternalContext().log(e.getMessage(), e);
            throw e;
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