The wb06 project
General info
Project description
Data source
The About view
The Life expectancy at birth view
Changes relative to the wb05 project
Database
General info
This project provides charts of the life expectancy at birth by country. Groups of countries can be created by selecting the desired entries in the prmRegion and prmIncome comboboxes.
Then, the user can select a country from the group by using the prmCountry combobox, as seen below:
It is also possible to manually iterate through the countries by using the arrow buttons or let the program iterate automatically by pressing the 
button.
Project description
Data source
The project declares an SQL data source consisting of an embedded Derby database stored in a zip file located in the project's directory.
Because Viewreka sets the value of the system property 'user.dir' to the directory of the current project, this property is used in the connection string to locate the database.
The About View
The About view provides an HTML chart with information about this project. The chart content is retrieved from an external file (and it is the document you are currently reading).
The Life expectancy at birth View
The Life expectancy at birth view provides an XY chart based on the dataset dsLifeExp, which is defined by a parameterized query.
Changes relative to the wb05 project:
- The dsRegion dataset, which provides the list of region names, has been introduced.
- The parameter prmRegion uses the dataset dsRegion in order to specify its possible values.
- The dsIncome dataset, which provides the list of income groups, has been introduced.
- The parameter prmIncome uses the dataset dsIncome in order to specify its possible values.
- Because lists of possible values are available for the parameters prmRegion and prmIncome, the program has replaced their associated text fields with comboboxes.
- In the wb05 project, it was possible to select all regions and/or all incomes (by using the wildcard %). This is no longer possible in wb06, but it will be possible again in wb07.
Database
This project uses a Derby database compiled from data provided by the World Bank.
The database consists of four tables, as seen in the figure below:
Below is a sample of the data contained in these tables:
The database also contains two views that present the data in a user friendly form, as illustrated by the samples below:
V_COUNTRY
V_INDICATOR
