The JCR query object model describes the queries that can be evaluated by a JCR repository independent of any particular query
language, such as SQL. JCR defines the
QueryObjectModel interface as the primary representatino of this query object
model, but this interface is not sufficient for certain queries, such as unions or intersections of other queries. This
interface is an extension to the JCR API that mirrors the QueryObjectModel interface for set queries.
A query consists of:
The query object model representation of a query is created by factory methods in the
getLeft, getOperation, getRight, isAll
getColumns, getLimits, getOrderings
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