reuse of filters with different values

We have a usage scenario where the same filters will have to be applied several times with different values. Looking the javadocs, it seems like there is no way to change the values of pre-packaged filters (EqualsFilter, GreaterFilter etc.). Is that correct or is there a way to do it? I see that if we use CohQL, we can use bind variables to do this. However, the use cases we should rather just more complex extractors ReflectionFilters.

In addition, there no performance impact by using CohQL against java constructs directly?

Thank you
Manju.
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Hi Manju,

While it is true that you cannot change values in the built in filters, even if you could it wouldn't make you save a lot on the construction of a new filter every time. I guess that if you build a very large number of filters, then you're going to create more garbage, but that shouldn't be a problem either. Some of the more specialized filters also contain State so that you do not want to resuse them.

The main performance issue I know with CohQL which is only creates extractors of reflection so won't enjoy all serialized POF values you have. If you have indexed each value you want to query on using the same extractors relflection then it would help, but again, this means that everything you deserialization of the values for the query or insert to update the index.

Kind regards
JK

Tags: Fusion Middleware

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                      String sql = "update vdet set  AMOUNT='"+ value5+"' where VID='" + value1 + "'";                     
    
                      stat = getDBTransaction().createPreparedStatement(sql, 1);  
    
                      stat.executeUpdate();
                    }
                    catch (Exception e)
                    {
                      e.printStackTrace();
                    }
                    finally
                    {
                      try
                      {
                        stat.close();
                      }
                      catch (Exception e)
                      {
                        e.printStackTrace();
                      }
                    }                  
    
                  }
    

    Second line code is inside a bean method

        public void addNewPurchaseVoucher(ActionEvent actionEvent) {
            // Add event code here...
    
            BindingContainer bindings = BindingContext.getCurrent().getCurrentBindingsEntry();
                   DCIteratorBinding dciter = (DCIteratorBinding) bindings.get("VoucherView1Iterator");
                   RowSetIterator rsi = dciter.getRowSetIterator();
                   Row lastRow = rsi.last();
                   int lastRowIndex = rsi.getRangeIndexOf(lastRow);
                   Row newRow = rsi.createRow();
                   newRow.setNewRowState(Row.STATUS_NEW);
                   rsi.insertRowAtRangeIndex(lastRowIndex +1, newRow);
                   rsi.setCurrentRow(newRow);
    
                   BindingContainer bindings1 = BindingContext.getCurrent().getCurrentBindingsEntry();
                   DCIteratorBinding dciter1 = (DCIteratorBinding) bindings1.get("VdetView1Iterator");
                   RowSetIterator rsi1 = dciter1.getRowSetIterator();
                   Row lastRow1 = rsi1.last();
                   int lastRowIndex1 = rsi1.getRangeIndexOf(lastRow1);
                   Row newRow1 = rsi1.createRow();
                   newRow1.setNewRowState(Row.STATUS_NEW);
                   rsi1.insertRowAtRangeIndex(lastRowIndex1 +1, newRow1);
                   rsi1.setCurrentRow(newRow1);
        }
    

    And final saveUpdate method is

        public void saveUpdateButton(ActionEvent actionEvent) {
            // Add event code here...
    
            BindingContainer bindingsBC = BindingContext.getCurrent().getCurrentBindingsEntry();      
    
                   OperationBinding commit = bindingsBC.getOperationBinding("Commit");
                   commit.execute(); 
    
            OperationBinding operationBinding = BindingContext.getCurrent().getCurrentBindingsEntry().getOperationBinding("Commit");
            operationBinding.execute();
            DCIteratorBinding iter = (DCIteratorBinding) BindingContext.getCurrent().getCurrentBindingsEntry().get("VdetView1Iterator");// write iterator name from pageDef.
            iter.getViewObject().executeQuery();  
    
        }
    

    Thanks for all the cooperation to obtain the desired results.

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