- All Superinterfaces:
public interface QueryObjectModel
- extends Query
A query in the JCR query object model.
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.
A query consists of:
- a source. When the query is evaluated, the
source evaluates its selectors and the joins between them to produce a
(possibly empty) set of node-tuples. This is a set of 1-tuples if the query
has one selector (and therefore no joins), a set of 2-tuples if the query has
two selectors (and therefore one join), a set of 3-tuples if the query has
three selectors (two joins), and so forth.
- an optional constraint.
When the query is evaluated, the constraint filters the set of
- a list of zero or more orderings. The orderings
specify the order in which the node-tuples appear in the query results. The
relative order of two node-tuples is determined by evaluating the specified
orderings, in list order, until encountering an ordering for which one
node-tuple precedes the other. If no orderings are specified, or if for none
of the specified orderings does one node-tuple precede the other, then the
relative order of the node-tuples is implementation determined (and may be
- a list of zero or more columns to include in the tabular
view of the query results. If no columns are specified, the columns
available in the tabular view are implementation determined, but minimally
include, for each selector, a column for each single-valued non-residual
property of the selector's node type.
The query object model representation of a query is created by factory
methods in the
- JCR 2.0
- Gets the node-tuple source for this query.
- the node-tuple source; non-null
- Gets the constraint for this query.
- the constraint, or null if none
- Gets the orderings for this query.
- an array of zero or more orderings; non-null
- Gets the columns for this query.
- an array of zero or more columns; non-null
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