Package org.apache.olingo.odata2.jpa.processor.api.jpql

Interface JPQLSelectContextView

All Superinterfaces:

JPQLContextView

All Known Subinterfaces:

JPQLJoinContextView

public interface JPQLSelectContextView
extends JPQLContextView

The interface provide a view on JPQL select context.The interface provides methods for accessing the clauses of a JPQL SELECT statement like "SELECT", "ORDERBY", "WHERE". The clauses are built from OData read entity set request views. The clauses thus built can be used for building JPQL Statements.

See Also:

• JPQLStatement

Method Summary

Modifier and Type	Method	Description
String	getOrderByCollection()	The method returns an JPQL ORDERBY clause.
String	getSelectExpression()	The method returns a JPQL SELECT clause.
String	getWhereExpression()	The method returns a JPQL WHERE condition as string.

Methods inherited from interface org.apache.olingo.odata2.jpa.processor.api.jpql.JPQLContextView

getJPAEntityAlias, getJPAEntityName, getType

Method Details

getSelectExpression

String getSelectExpression()

The method returns a JPQL SELECT clause. The SELECT clause is built from $select OData system Query option.

Returns:

a String representing a SELECT clause in JPQL

getOrderByCollection

String getOrderByCollection()

The method returns an JPQL ORDERBY clause. The ORDERBY clause is built from $orderby OData system query option. The hash map contains

1. Key - JPA Entity Property name to be ordered
2. Value - Sort Order in JPQL (desc,asc)

in the order based on the expression specified (accessible with Map.entrySet(..)). https://issues.apache.org/jira/browse/OLINGO-606

Returns:

an ordered map of (JPA Property Name,Sort Order)

getWhereExpression

String getWhereExpression()

The method returns a JPQL WHERE condition as string. The WHERE condition can be built from $filter OData System Query Option and/or Key predicates of an OData Request.

Returns:

a String representing a WHERE condition in JPQL