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<Introducing DataValve ⁄ >

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DataValve is a free open source library that facilitates the creation of re-usable view and data access components as well as providing a number of features for pagination, sorting and parameterizing queries. This article defines the problems DataValve aims to solve and how it solves them.

The need for DataValve

Most data driven applications have a need for displaying data that is organized into pages. Whether it is search results or sales reports, dumping a complete set of data results into a web page or a Swing grid is sooner or later going to run into problems as the datasets grow larger.

Visual web frameworks such as Wicket or JSF usually have some components that facilitate pagination and most data access frameworks such as JDBC, Hibernate or JPA have facilities to access results in a paginated manner. Typically however, you need to write your own code to bridge the gap between the view and the data access mechanism. If you write your own glue code you will probably need to re-write it again and again if you want to re-use the back end code with a different view layer or change the data access mechanism.

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