Configuring the components

Configuring the tFixedFlowInput component

Procedure

Double-click the tFixedFlowInput component to open its Basic settings view on the Component tab.
Click the [...] button next to Edit schema to open the Schema dialog box and define the data structure of the input data.
In this editor, click the [+] button three times to add three columns and name them id, name and age.
In the Type column, select Integer for id and age.
Click OK to close the editor, then click Yes to validate these changes and accept the propagation prompted by the dialog box that pops up.
Select Use Inline Content (delimited file) in the Mode area.
In the Content field, enter the following customer data:
```
1;Judy;27
              2;Lily;45
              3;Peter;59
              4;John;30
              5;Teddy;45
```

Configuring the tSortRow component

Procedure

Double-click the tSortRow to open its Basic settings view on the Component tab.
In the Criteria table, click the [+] button to add one row.
In the Schema column column, select the data column on which the sorting operation is based. In this example, select age as it is the ages that should be compared and counted.
In the sort num or alpha? column, select the type of sorting operation to perform. In this example, select num, which means numerical, as age contains integer data.
In the Order asc or desc? column, select desc to display data on the console in descending order.

Configuring the tMemorizeRows component

Procedure

Double-click the tMemorizeRows component to open its Basic settings view on the Component tab.
In the Row count to memorize field, type in the maximum number of rows to be memorized at any given time. As in this example you need to compare ages of two customers for each time, enter 2. This component memorizes two rows at maximum at any given moment and always indexes the new incoming row as 0 and the previous incoming row as 1.
In the Memorize column of the Columns to memorize table, select the check box(es) to determine the column(s) to be memorized. In this example, select the check box corresponding to age.

Configuring the tJavaFlex and tJava components

Procedure

Double-click the tJavaFlex component to open its Basic settings view on the Component tab.
In the Start code area, enter the Java code that will be called during the initialization phase. In this example, type in int count=0; in order to declare a variable count and assign the value 0 to it.
In the Main code area, enter the Java code to be applied to each row in the data flow. In this scenario, type in:if(!age_tMemorizeRows_1[0].equals(age_tMemorizeRows_1[1])) { count++; } System.out.println(age_tMemorizeRows_1[0]);This code compares two ages memorized by the tMemorizeRows component each time and counts one change every time the ages are found to be different. This code then displays the age that has been indexed as 0 by the tMemorizeRows component. When the tJavaFlex component is in the same flow of the tMemorizeRows component, the variable format is ColumnName_ComponentName[index].
In the End code area, enter the Java code that will be called during the closing phase. In this example, type in globalMap.put("number", count); to initialize the global variable number with the value of the count variable.
Double-click the tJava component to open its Basic settings view on the Component tab.
In the Code area, enter the flollowing code to display the number of occurrences of different ages and the lowest age within the customers on the console:System.out.println("Different ages: "+globalMap.get("number")); System.out.println("Lowest age: " + ((Integer[])globalMap.get("tMemorizeRows_1_age"))[0]);
The method globalMap.get() is used by the tJava to retrieve the array values. Note that here, the tJava is used outside the subJob tMemorizeRows so the variable format should be ComponentName_ColumnName, which is different from the variable format used by a component placed in the same flow.

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