org.eclipse.persistence.jpa.jpql.parser

Class JPQLGrammar2_1

java.lang.Object

org.eclipse.persistence.jpa.jpql.parser.AbstractJPQLGrammar

org.eclipse.persistence.jpa.jpql.parser.JPQLGrammar2_1

All Implemented Interfaces:

JPQLGrammar

public final class JPQLGrammar2_1
extends AbstractJPQLGrammar

This JPQLGrammar provides support for parsing JPQL queries defined in JSR-338 - Java Persistence 2.1.

The following is the JPQL grammar defined in JPA version 2.1.

 QL_statement ::= select_statement | update_statement | delete_statement

 select_statement ::= select_clause from_clause [where_clause] [groupby_clause] [having_clause] [orderby_clause]

 update_statement ::= update_clause [where_clause]

 delete_statement ::= delete_clause [where_clause]

 from_clause ::= FROM identification_variable_declaration {, {identification_variable_declaration | collection_member_declaration}}*

 identification_variable_declaration ::= range_variable_declaration { join | fetch_join }*

 range_variable_declaration ::= entity_name [AS] identification_variable

 join ::= join_spec join_association_path_expression [AS] identification_variable [join_condition]

 fetch_join ::= join_spec FETCH join_association_path_expression [join_condition]

 join_spec ::= [ LEFT [OUTER] | INNER ] JOIN

 join_condition ::= ON conditional_expression

 join_association_path_expression ::= join_collection_valued_path_expression |
                                      join_single_valued_path_expression |
                                      TREAT(join_collection_valued_path_expression AS subtype) |
                                      TREAT(join_single_valued_path_expression AS subtype)

 join_collection_valued_path_expression ::= identification_variable.{single_valued_embeddable_object_field.}*collection_valued_field

 join_single_valued_path_expression ::= identification_variable.{single_valued_embeddable_object_field.}*single_valued_object_field

 collection_member_declaration ::= IN (collection_valued_path_expression) [AS] identification_variable

 qualified_identification_variable ::= composable_qualified_identification_variable |
                                       ENTRY(identification_variable)

 composable_qualified_identification_variable ::= KEY(identification_variable) |
                                                  VALUE(identification_variable)

 single_valued_path_expression ::= qualified_identification_variable |
                                   TREAT(qualified_identification_variable AS subtype) |
                                   state_field_path_expression |
                                   single_valued_object_path_expression

 general_identification_variable ::= identification_variable |
                                     composable_qualified_identification_variable

 general_subpath ::= simple_subpath | treated_subpath{.single_valued_object_field}*

 simple_subpath ::= general_identification_variable |
                    general_identification_variable{.single_valued_object_field}*

 treated_subpath ::= TREAT(general_subpath AS subtype)

 state_field_path_expression ::= general_subpath.state_field

 single_valued_object_path_expression ::= general_subpath.single_valued_object_field

 collection_valued_path_expression ::= general_subpath.{collection_valued_field}

 update_clause ::= UPDATE entity_name [[AS] identification_variable] SET update_item {, update_item}*

 update_item ::= [identification_variable.]{single_valued_embeddable_object_field.}*{state_field | single_valued_object_field} = new_value

 new_value ::= scalar_expression |
               simple_entity_expression |
               NULL

 delete_clause ::= DELETE FROM entity_name [[AS] identification_variable]

 select_clause ::= SELECT [DISTINCT] select_item {, select_item}*

 select_item ::= select_expression [[AS] result_variable]

 select_expression ::= single_valued_path_expression |
                       scalar_expression |
                       aggregate_expression |
                       identification_variable |
                       OBJECT(identification_variable) |
                       constructor_expression

 constructor_expression ::= NEW constructor_name ( constructor_item {, constructor_item}* )

 constructor_item ::= single_valued_path_expression |
                      scalar_expression |
                      aggregate_expression |
                      identification_variable

 aggregate_expression ::= { AVG | MAX | MIN | SUM } ([DISTINCT] state_field_path_expression) |
                          COUNT ([DISTINCT] identification_variable |
                                            state_field_path_expression |
                                            single_valued_object_path_expression) |
                          function_invocation

 where_clause ::= WHERE conditional_expression

 groupby_clause ::= GROUP BY groupby_item {, groupby_item}*

 groupby_item ::= single_valued_path_expression | identification_variable

 having_clause ::= HAVING conditional_expression

 orderby_clause ::= ORDER BY orderby_item {, orderby_item}*

 orderby_item ::= state_field_path_expression | result_variable [ ASC | DESC ]

 subquery ::= simple_select_clause subquery_from_clause [where_clause] [groupby_clause] [having_clause]

 subquery_from_clause ::= FROM subselect_identification_variable_declaration
                               {, subselect_identification_variable_declaration | collection_member_declaration}*

 subselect_identification_variable_declaration ::= identification_variable_declaration |
                                                   derived_path_expression [AS] identification_variable {join}* |
                                                   derived_collection_member_declaration

 derived_path_expression ::= general_derived_path.single_valued_object_field |
                             general_derived_path.collection_valued_field

 general_derived_path ::= simple_derived_path |
                          treated_derived_path{.single_valued_object_field}*

 simple_derived_path ::= superquery_identification_variable{.single_valued_object_field}*

 treated_derived_path ::= TREAT(general_derived_path AS subtype)

 derived_collection_member_declaration ::= IN superquery_identification_variable.{single_valued_object_field.}*collection_valued_field

 simple_select_clause ::= SELECT [DISTINCT] simple_select_expression

 simple_select_expression::= single_valued_path_expression |
                             scalar_expression |
                             aggregate_expression |
                             identification_variable

 scalar_expression ::= arithmetic_expression |
                       string_expression |
                       enum_expression |
                       datetime_expression |
                       boolean_expression |
                       case_expression |
                       entity_type_expression

 conditional_expression ::= conditional_term | conditional_expression OR conditional_term

 conditional_term ::= conditional_factor | conditional_term AND conditional_factor

 conditional_factor ::= [NOT] conditional_primary

 conditional_primary ::= simple_cond_expression | (conditional_expression)

 simple_cond_expression ::= comparison_expression |
                            between_expression |
                            like_expression |
                            in_expression |
                            null_comparison_expression |
                            empty_collection_comparison_expression |
                            collection_member_expression |
                            exists_expression

 between_expression ::= arithmetic_expression [NOT] BETWEEN arithmetic_expression AND arithmetic_expression |
                        string_expression [NOT] BETWEEN string_expression AND string_expression |
                        datetime_expression [NOT] BETWEEN datetime_expression AND datetime_expression

 in_expression ::= {state_field_path_expression | type_discriminator} [NOT] IN { ( in_item {, in_item}* ) | (subquery) | collection_valued_input_parameter }

 in_item ::= literal | single_valued_input_parameter

 like_expression ::= string_expression [NOT] LIKE pattern_value [ESCAPE escape_character]

 escape_character ::= single_character_string_literal | character_valued_input_parameter

 null_comparison_expression ::= {single_valued_path_expression | input_parameter} IS [NOT] NULL

 empty_collection_comparison_expression ::= collection_valued_path_expression IS [NOT] EMPTY

 collection_member_expression ::= entity_or_value_expression [NOT] MEMBER [OF] collection_valued_path_expression

 entity_or_value_expression ::= single_valued_object_path_expression |
                                state_field_path_expression |
                                simple_entity_or_value_expression

 simple_entity_or_value_expression ::= identification_variable |
                                       input_parameter |
                                       literal

 exists_expression ::= [NOT] EXISTS (subquery)

 all_or_any_expression ::= { ALL | ANY | SOME} (subquery)

 comparison_expression ::= string_expression comparison_operator {string_expression | all_or_any_expression} |
                           boolean_expression { = | <> } {boolean_expression | all_or_any_expression} |
                           enum_expression { = | <> } {enum_expression | all_or_any_expression} |
                           datetime_expression comparison_operator {datetime_expression | all_or_any_expression} |
                           entity_expression { = | <> } {entity_expression | all_or_any_expression} |
                           arithmetic_expression comparison_operator {arithmetic_expression | all_or_any_expression} |
                           entity_type_expression { = | <> } entity_type_expression}

 comparison_operator ::= = | > | >= | < | <= | <>

 arithmetic_expression ::= arithmetic_term | arithmetic_expression { + | - } arithmetic_term

 arithmetic_term ::= arithmetic_factor | arithmetic_term { * | / } arithmetic_factor

 arithmetic_factor ::= [{ + | - }] arithmetic_primary

 arithmetic_primary ::= state_field_path_expression |
                        numeric_literal |
                        (arithmetic_expression) |
                        input_parameter |
                        functions_returning_numerics |
                        aggregate_expression |
                        case_expression |
                        function_invocation |
                        (subquery)

 string_expression ::= state_field_path_expression |
                       string_literal |
                       input_parameter |
                       functions_returning_strings |
                       aggregate_expression |
                       case_expression |
                       function_invocation |
                       (subquery)

 datetime_expression ::= state_field_path_expression |
                         input_parameter |
                         functions_returning_datetime |
                         aggregate_expression |
                         case_expression |
                         function_invocation |
                         date_time_timestamp_literal |
                         (subquery)

 boolean_expression ::= state_field_path_expression |
                        boolean_literal |
                        input_parameter |
                        case_expression |
                        function_invocation |
                        (subquery)

 enum_expression ::= state_field_path_expression |
                     enum_literal |
                     input_parameter |
                     case_expression |
                     (subquery)

 entity_expression ::= single_valued_object_path_expression | simple_entity_expression

 simple_entity_expression ::= identification_variable |
                              input_parameter

 entity_type_expression ::= type_discriminator |
                            entity_type_literal |
                            input_parameter

 type_discriminator ::= TYPE(identification_variable | single_valued_object_path_expression | input_parameter)

 functions_returning_numerics ::= LENGTH(string_expression) |
                                  LOCATE(string_expression, string_expression[, arithmetic_expression]) |
                                  ABS(arithmetic_expression) |
                                  SQRT(arithmetic_expression) |
                                  MOD(arithmetic_expression, arithmetic_expression) |
                                  SIZE(collection_valued_path_expression) |
                                  INDEX(identification_variable)

 functions_returning_datetime ::= CURRENT_DATE | CURRENT_TIME | CURRENT_TIMESTAMP

 functions_returning_strings ::= CONCAT(string_expression, string_expression {, string_expression}*) |
                                 SUBSTRING(string_expression, arithmetic_expression [, arithmetic_expression]) |
                                 TRIM([[trim_specification] [trim_character] FROM] string_expression) |
                                 LOWER(string_expression) |
                                 UPPER(string_expression)

 trim_specification ::= LEADING | TRAILING | BOTH

 function_invocation ::= FUNCTION(string_literal {, function_arg}*)

 function_arg ::= literal |
                  state_field_path_expression |
                  input_parameter |
                  scalar_expression

 case_expression ::= general_case_expression |
                     simple_case_expression |
                     coalesce_expression |
                     nullif_expression

 general_case_expression ::= CASE when_clause {when_clause}* ELSE scalar_expression END

 when_clause ::= WHEN conditional_expression THEN scalar_expression

 simple_case_expression ::= CASE case_operand simple_when_clause {simple_when_clause}* ELSE scalar_expression END

 case_operand ::= state_field_path_expression | type_discriminator

 simple_when_clause ::= WHEN scalar_expression THEN scalar_expression

 coalesce_expression ::= COALESCE(scalar_expression {, scalar_expression}+)

 nullif_expression ::= NULLIF(scalar_expression, scalar_expression)

 literal ::= boolean_literal |
             enum_literal
             numeric_literal |
             string_literal |

 boolean_literal ::= TRUE | FALSE

 string_literal ::= '''{identifier}*'''

 enum_literal ::= {identifier'.'}+identifier

 identifier ::= Character.isJavaIdentifierStart(char){Character.isJavaIdentifierPart(char)}*

 literal_temporal ::= date_literal | time_literal | timestamp_literal

 input_parameter ::= ':'{identifier}+ | '?'{'1'-'9'}{'0'-'9'}*

 date_literal ::= '{' ''d'' (' ' | '\t')+ '\'' date_string '\'' (' ' | '\t')* '}'

 time_literal ::= '{' ''t'' (' ' | '\t')+ '\'' trim_string '\'' (' ' | '\t')* '}'

 timestamp_literal ::= '{' ('ts') (' ' | '\t')+ '\'' date_string ' ' trim_string '\'' (' ' | '\t')* '}'

 date_string ::= [0-9] [0-9] [0-9] [0-9] '-' [0-9] [0-9] '-' [0-9] [0-9]

 trim_string ::= [0-9] ([0-9])? ':' [0-9] [0-9] ':' [0-9] [0-9] '.' [0-9]*

Provisional API: This interface is part of an interim API that is still under development and expected to change significantly before reaching stability. It is available at this early stage to solicit feedback from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken (repeatedly) as the API evolves.

Version:

2.5

Author:

Pascal Filion

Since:

2.4

Constructor Summary

Constructors

Constructor and Description
JPQLGrammar2_1() Creates a new JPQLExtension2_1.

Method Summary

Methods

Modifier and Type	Method and Description
protected JPQLGrammar	buildBaseGrammar() Creates the base JPQLGrammar this one extends, if one exists.
static void	extend(AbstractJPQLGrammar jpqlGrammar) Extends the given JPQLGrammar with the information of this one without instantiating the base JPQLGrammar.
JPAVersion	getJPAVersion() Returns the JPAVersion of the Java Persistence supported by this grammar.
java.lang.String	getProvider() Returns the persistence provider name.
java.lang.String	getProviderVersion() Returns the version of the persistence provider.
protected void	initializeBNFs() Registers the JPQL query BNFs defining the JPQL grammar.
protected void	initializeExpressionFactories() Registers the ExpressionFactories required to properly parse JPQL queries.
protected void	initializeIdentifiers() Registers the JPQL identifiers support by this IJPQLExtension.
static JPQLGrammar	instance() Returns the singleton instance of the default implementation of JPQLGrammar which provides support for the JPQL grammar defined in the JPA 2.1 functional specification.
java.lang.String	toString()

Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractJPQLGrammar

addChildBNF, addChildFactory, addIdentifier, addIdentifiers, buildExpressionRegistry, getBaseGrammar, getExpressionRegistry, initialize, registerBNF, registerFactory, registerIdentifierRole, registerIdentifierVersion, setFallbackBNFId, setFallbackExpressionFactoryId, setHandleCollection, setHandleNestedArray, setHandleSubExpression

Methods inherited from class java.lang.Object

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

Constructor Detail

JPQLGrammar2_1

public JPQLGrammar2_1()

Creates a new JPQLExtension2_1.

Method Detail

extend

public static void extend(AbstractJPQLGrammar jpqlGrammar)

Extends the given JPQLGrammar with the information of this one without instantiating the base JPQLGrammar.

Parameters:

jpqlGrammar - The JPQLGrammar to extend with the content of this one without instantiating the base JPQLGrammar

instance

public static JPQLGrammar instance()

Returns the singleton instance of the default implementation of JPQLGrammar which provides support for the JPQL grammar defined in the JPA 2.1 functional specification.

Returns:

The JPQLGrammar that only has support for JPA 2.1

buildBaseGrammar

protected JPQLGrammar buildBaseGrammar()

Creates the base JPQLGrammar this one extends, if one exists.

IMPORTANT: The singleton instance of any JPQLGrammar (for example JPQLGrammar1_0.instance() cannot be used, the API does not support extending it, a new instance has to be created.

Specified by:

buildBaseGrammar in class AbstractJPQLGrammar

Returns:

The base JPQLGrammar or null if there is no base grammar

getJPAVersion

public JPAVersion getJPAVersion()

Returns the JPAVersion of the Java Persistence supported by this grammar.

Returns:

The JPA version supported by this grammar

getProvider

public java.lang.String getProvider()

Returns the persistence provider name.

Returns:

The name of the persistence provider, null should never be returned

getProviderVersion

public java.lang.String getProviderVersion()

Returns the version of the persistence provider.

Returns:

The version of the persistence provider, if one is extending the default JPQL grammar defined in the Java Persistence specification, otherwise returns an empty string

initializeBNFs

protected void initializeBNFs()

Registers the JPQL query BNFs defining the JPQL grammar.

Specified by:

initializeBNFs in class AbstractJPQLGrammar

initializeExpressionFactories

protected void initializeExpressionFactories()

Registers the ExpressionFactories required to properly parse JPQL queries. An ExpressionFactory is responsible to create an Expression object that represents a portion of the JPQL query.

Specified by:

initializeExpressionFactories in class AbstractJPQLGrammar

initializeIdentifiers

protected void initializeIdentifiers()

Registers the JPQL identifiers support by this IJPQLExtension. The registration involves registering the JPAVersion and the IdentifierRole.

Specified by:

initializeIdentifiers in class AbstractJPQLGrammar

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object