org.apache.olingo.odata2.jpa.processor.core
Class ODataExpressionParser

java.lang.Object
  org.apache.olingo.odata2.jpa.processor.core.ODataExpressionParser

public class ODataExpressionParser
extends Object

This class contains utility methods for parsing the filter expressions built by core library from user OData Query.

Field Summary

static String	EMPTY
static Integer	methodFlag

Constructor Summary

ODataExpressionParser()

Method Summary

static String	parseKeyPredicates(List<KeyPredicate> keyPredicates, String tableAlias) This method evaluated the where expression for read of an entity based on the keys specified in the query.
static HashMap<String,String>	parseKeyPropertiesToJPAOrderByExpression(List<EdmProperty> edmPropertylist, String tableAlias)
static HashMap<String,String>	parseToJPAOrderByExpression(OrderByExpression orderByExpression, String tableAlias) This method parses the order by condition in the query.
static String	parseToJPASelectExpression(String tableAlias, ArrayList<String> selectedFields) This method parses the select clause
static String	parseToJPAWhereExpression(CommonExpression whereExpression, String tableAlias) This method returns the parsed where condition corresponding to the filter input in the user query.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

EMPTY

public static final String EMPTY

See Also:

Constant Field Values

methodFlag

public static Integer methodFlag

Constructor Detail

ODataExpressionParser

public ODataExpressionParser()

Method Detail

parseToJPAWhereExpression

public static String parseToJPAWhereExpression(CommonExpression whereExpression,
                                               String tableAlias)
                                        throws ODataException

This method returns the parsed where condition corresponding to the filter input in the user query.

Parameters:

whereExpression -

Returns:

Parsed where condition String

Throws:

ODataException

parseToJPASelectExpression

public static String parseToJPASelectExpression(String tableAlias,
                                                ArrayList<String> selectedFields)

This method parses the select clause

Parameters:

tableAlias -

selectedFields -

Returns:

a select expression

parseToJPAOrderByExpression

public static HashMap<String,String> parseToJPAOrderByExpression(OrderByExpression orderByExpression,
                                                                 String tableAlias)
                                                          throws ODataJPARuntimeException

This method parses the order by condition in the query.

Parameters:

orderByExpression -

Returns:

a map of JPA attributes and their sort order

Throws:

ODataJPARuntimeException

parseKeyPredicates

public static String parseKeyPredicates(List<KeyPredicate> keyPredicates,
                                        String tableAlias)
                                 throws ODataJPARuntimeException

This method evaluated the where expression for read of an entity based on the keys specified in the query.

Parameters:

keyPredicates -

Returns:

the evaluated where expression

Throws:

ODataJPARuntimeException

parseKeyPropertiesToJPAOrderByExpression

public static HashMap<String,String> parseKeyPropertiesToJPAOrderByExpression(List<EdmProperty> edmPropertylist,
                                                                              String tableAlias)
                                                                       throws ODataJPARuntimeException

Throws:

ODataJPARuntimeException