The JSP tags provided in the toolkit help in the development of applications that require an HTML graphical user interface. The JSP tags provide the following features:
▪ Encapsulated Java code that knows how to render HTML tags based on dynamic attributes
▪ Java code to integrate dynamic information obtained from the runtime context, using the JspContextServices interface (for example, information for a data field, field validation errors, and hidden fields to be sent to the client)
▪ Exception and error management using the JspContextServices interface
▪ Compound components, such as the combination of an entry field with its related label. This feature allows the system to set the label color based on the status of the data associated with the entry field.
The JSP tags depend on the following toolkit components:
▪ The HTML Connector and its corresponding HtmlRequestHandler and HtmlPresentationHandler. The presentation handler uses the JSP engine to process the JSP contents. These classes are dependent on the JspContextServices interface and the DSEJspContextServices implementation class, which provides access to the information in the context.
▪ Typed data elements, which are used by the DSEJspContextServices class to exploit the information for a specific data element.
The package, including the JSP tags components, is named com.ibm.btt.gui.jsptags. See Custom JSP tags for a complete list of the provided tags.