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POJava Persistence is a small library of tools used in the persistence and retrieval of data to and from storage, such as to a database or XML document. It contains an ORM (Object Relational Mapping) tool that supports use of existing beans and POJO's rather than requiring POJO's to be instrumented to support a tool.

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Adaptors tranform data, or more specifically, data held in Bindings,
    where a Binding specifies both a Type (a Java Class) and a Value (which
    may be null, hence the necessity of the Type field).

POJava uses Bindings extensively, both in the Adaptors and in the
    BoundString object. Understanding Bindings is key to understanding how
    to get the most out of using POJava. In this case, an Adaptor performs
    data transformation on a Binding, returning either a new
    Binding or the same Binding as a result if no transformation is needed.