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Oracle Fusion Middleware Java API Reference for Oracle TopLink 11g Release 1 (11.1.1) E28847-01 |
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public interface Expression
This is the root interface of the Java Persistence query parsed tree. The parser supports the latest release of the JPQL functional specification, which is JSR 317: Java™ Persistence 2.0
The BNF for the Java Persistence query language, version 2.0:
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
fetch_join ::= join_spec FETCH join_association_path_expression
join_spec ::= [ LEFT [OUTER] | INNER ] JOIN
join_association_path_expression ::= join_collection_valued_path_expression |
join_single_valued_path_expression
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 ::= KEY(identification_variable) |
VALUE(identification_variable) |
ENTRY(identification_variable)
single_valued_path_expression ::= qualified_identification_variable |
state_field_path_expression |
single_valued_object_path_expression
general_identification_variable ::= identification_variable |
KEY(identification_variable) |
VALUE(identification_variable)
state_field_path_expression ::= general_identification_variable.{single_valued_object_field.}*state_field
single_valued_object_path_expression ::= general_identification_variable.{single_valued_object_field.}*single_valued_object_field
collection_valued_path_expression ::= general_identification_variable.{single_valued_object_field.}*collection_valued_field
update_clause ::= UPDATE entity_name [[AS] identification_variable] SET update_item {, update_item}*
update_item ::= [identification_variable.]{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)
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 ::= superquery_identification_variable.{single_valued_object_field.}*collection_valued_field |
superquery_identification_variable.{single_valued_object_field.}*single_valued_object_field
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 ::= simple_arithmetic_expression |
string_primary |
enum_primary |
datetime_primary |
boolean_primary |
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 |
in_expression |
like_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]
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 ::= simple_arithmetic_expression | (subquery)
simple_arithmetic_expression ::= arithmetic_term | simple_arithmetic_expression { + | - } arithmetic_term
arithmetic_term ::= arithmetic_factor | arithmetic_term { * | / } arithmetic_factor
arithmetic_factor ::= [{ + | - }] arithmetic_primary
arithmetic_primary ::= state_field_path_expression |
numeric_literal |
(simple_arithmetic_expression) |
input_parameter |
functions_returning_numerics |
aggregate_expression |
case_expression
string_expression ::= string_primary | (subquery)
string_primary ::= state_field_path_expression |
string_literal |
input_parameter |
functions_returning_strings |
aggregate_expression |
case_expression
datetime_primary ::= state_field_path_expression |
input_parameter |
functions_returning_datetime |
aggregate_expression |
case_expression |
date_time_timestamp_literal
datetime_expression ::= datetime_primary | (subquery)
boolean_expression ::= boolean_primary | (subquery)
boolean_primary ::= state_field_path_expression |
boolean_literal |
input_parameter |
case_expression
enum_expression ::= enum_primary | (subquery)
enum_primary ::= state_field_path_expression |
enum_literal |
input_parameter |
case_expression
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_primary) |
LOCATE(string_primary, string_primary[, simple_arithmetic_expression]) |
ABS(simple_arithmetic_expression) |
SQRT(simple_arithmetic_expression) |
MOD(simple_arithmetic_expression, simple_arithmetic_expression) |
SIZE(collection_valued_path_expression) |
INDEX(identification_variable)
functions_returning_datetime ::= CURRENT_DATE | CURRENT_TIME | CURRENT_TIMESTAMP | literalTemporal
functions_returning_strings ::= CONCAT(string_primary, string_primary {, string_primary}*) |
SUBSTRING(string_primary, simple_arithmetic_expression [, simple_arithmetic_expression]) |
TRIM([[trim_specification] [trim_character] FROM] string_primary) |
LOWER(string_primary) |
UPPER(string_primary)
trim_specification ::= LEADING | TRAILING | BOTH
trim_character ::= string_literal | input_parameter
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)
boolean_literal ::= TRUE | FALSE
string_literal ::= 'string'
enum_literal ::= {package_name.}*EnumType.CONSTANT
literalTemporal ::= date_literal | TIME_LITERAL | TIMESTAMP_LITERAL
date_literal ::= "{" "'d'" (' ' | '\t')+ '\'' DATE_STRING '\'' (' ' | '\t')* "}"
TIME_LITERAL ::= "{" "'t'" (' ' | '\t')+ '\'' TIME_STRING '\'' (' ' | '\t')* "}"
TIMESTAMP_LITERAL ::= "{" ('ts') (' ' | '\t')+ '\'' DATE_STRING ' ' TIME_STRING '\'' (' ' | '\t')* "}"
DATE_STRING ::= '0'..'9' '0'..'9' '0'..'9' '0'..'9' '-' '0'..'9' '0'..'9' '-' '0'..'9' '0'..'9'
TIME_STRING ::= '0'..'9' ('0'..'9')? ':' '0'..'9' '0'..'9' ':' '0'..'9' '0'..'9' '.' '0'..'9'*
The following BNFs is the EclipseLink's extension over the standard JPQL BNF.
join ::= join_spec { join_association_path_expression | join_treat_association_path_expression } [AS] identification_variable
join_treat_association_path_expression ::= TREAT(join_association_path_expression AS entity_type_literal)
functions_returning_strings ::= ... | func_expression
functions_returning_numerics ::= ... | func_expression
functions_returning_datetime ::= ... | func_expression
func_expression ::= FUNC (func_name {, func_item}*)
func_item ::= scalar_expression (NOT SURE)
orderby_item ::= state_field_path_expression | result_variable | scalar_expression [ ASC | DESC ]
groupby_item ::= single_valued_path_expression | identification_variable | scalar_expression
aggregate_expression ::= { AVG | MAX | MIN | SUM | COUNT } ([DISTINCT] scalar_expression)
in_item ::= literal | single_valued_input_parameter | scalar_expression
Field Summary | |
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static java.lang.String |
ABS The constant for 'ABS'. |
static java.lang.String |
ALL The constant for 'ALL'. |
static java.lang.String |
AND The constant for 'AND'. |
static java.lang.String |
ANY The constant for 'ANY'. |
static java.lang.String |
AS The constant for 'AS'. |
static java.lang.String |
ASC The constant for 'ASC'. |
static java.lang.String |
AVG The constant for 'AVG'. |
static java.lang.String |
BETWEEN The constant for 'BETWEEN'. |
static java.lang.String |
BIT_LENGTH The constant for 'BIT_LENGTH', which is an unused keyword. |
static java.lang.String |
BOTH The constant for 'BOTH'. |
static java.lang.String |
CASE The constant for the identifier 'CASE'. |
static java.lang.String |
CHAR_LENGTH The constant for 'CHAR_LENGTH', which is an unused keyword. |
static java.lang.String |
CHARACTER_LENGTH The constant for 'CHARACTER_LENGTH', which is an unused keyword. |
static java.lang.String |
CLASS The constant for 'CLASS', which is an unused keyword. |
static java.lang.String |
COALESCE The constant for 'COALESCE'. |
static java.lang.String |
CONCAT The constant for 'CONCAT'. |
static java.lang.String |
COUNT The constant for 'COUNT'. |
static java.lang.String |
CURRENT_DATE The constant for 'CURRENT_DATE'. |
static java.lang.String |
CURRENT_TIME The constant for 'CURRENT_DATE'. |
static java.lang.String |
CURRENT_TIMESTAMP The constant for 'CURRENT_TIMESTAMP'. |
static java.lang.String |
DELETE The constant for 'DELETE'. |
static java.lang.String |
DELETE_FROM The constant for 'DELETE FROM'. |
static java.lang.String |
DESC The constant for 'DESC'. |
static java.lang.String |
DIFFERENT The constant for '<>'. |
static java.lang.String |
DISTINCT The constant for 'DISTINCT'. |
static java.lang.String |
DIVISION The constant for the division sign '/'. |
static java.lang.String |
ELSE The constant for the identifier 'ELSE'. |
static java.lang.String |
EMPTY The constant for 'EMPTY'. |
static java.lang.String |
END The constant for the identifier 'END'. |
static java.lang.String |
ENTRY The constant for 'ENTRY'. |
static java.lang.String |
EQUAL The constant for '='. |
static java.lang.String |
ESCAPE The constant for 'ESCAPE'. |
static java.lang.String |
EXISTS The constant for 'EXISTS'. |
static java.lang.String |
FALSE The constant for 'FALSE'. |
static java.lang.String |
FETCH A constant for 'FETCH'. |
static java.lang.String |
FROM The constant for 'FROM'. |
static java.lang.String |
FUNC The constant 'FUNC'. |
static java.lang.String |
GREATER_THAN The constant for '>'. |
static java.lang.String |
GREATER_THAN_OR_EQUAL The constant for '>='. |
static java.lang.String |
GROUP_BY The constant for 'GROUP BY'. |
static java.lang.String |
HAVING The constant for 'HAVING'. |
static java.lang.String |
IN The constant for 'IN'. |
static java.lang.String |
INDEX The constant for 'INDEX'. |
static java.lang.String |
INNER The constant for 'INNER'. |
static java.lang.String |
INNER_JOIN The constant for 'INNER JOIN'. |
static java.lang.String |
INNER_JOIN_FETCH The constant for 'INNER JOIN FETCH'. |
static java.lang.String |
IS The constant for 'IS'. |
static java.lang.String |
IS_EMPTY The constant for 'IS EMPTY'. |
static java.lang.String |
IS_NOT_EMPTY The constant for 'IS NOT EMPTY'. |
static java.lang.String |
IS_NOT_NULL The constant for 'IS NOT NULL'. |
static java.lang.String |
IS_NULL The constant for 'IS NULL'. |
static java.lang.String |
JOIN The constant for 'JOIN'. |
static java.lang.String |
JOIN_FETCH The constant for 'JOIN FETCH'. |
static java.lang.String |
KEY The constant for 'KEY'. |
static java.lang.String |
LEADING The constant for 'LEADING'. |
static java.lang.String |
LEFT The constant for 'LEFT'. |
static java.lang.String |
LEFT_JOIN The constant for 'LEFT JOIN'. |
static java.lang.String |
LEFT_JOIN_FETCH The constant for 'LEFT JOIN FETCH'. |
static java.lang.String |
LEFT_OUTER_JOIN The constant for 'LEFT OUTER JOIN'. |
static java.lang.String |
LEFT_OUTER_JOIN_FETCH The constant for 'LEFT OUTER JOIN FETCH'. |
static java.lang.String |
LENGTH The constant for 'LENGTH'. |
static java.lang.String |
LIKE The constant for 'LIKE'. |
static java.lang.String |
LOCATE The constant for 'LOCATE'. |
static java.lang.String |
LOWER The constant for 'LOWER'. |
static java.lang.String |
LOWER_THAN The constant for '<'. |
static java.lang.String |
LOWER_THAN_OR_EQUAL The constant for '<='. |
static java.lang.String |
MAX The constant for 'MAX'. |
static java.lang.String |
MEMBER The constant for 'MEMBER'. |
static java.lang.String |
MEMBER_OF The constant for 'MEMBER OF'. |
static java.lang.String |
MIN The constant for 'MIN'. |
static java.lang.String |
MINUS The constant for the minus sign '-'. |
static java.lang.String |
MOD The constant for 'MOD'. |
static java.lang.String |
MULTIPLICATION The constant for multiplication sign '*'. |
static java.lang.String |
NAMED_PARAMETER The constant for ':'. |
static java.lang.String |
NEW The constant for 'NEW'. |
static java.lang.String |
NOT The constant for 'NOT'. |
static java.lang.String |
NOT_BETWEEN The constant for 'NOT BETWEEN'. |
static java.lang.String |
NOT_EXISTS The constant for 'NOT EXISTS'. |
static java.lang.String |
NOT_IN The constant for 'NOT IN'. |
static java.lang.String |
NOT_LIKE The constant for 'NOT LIKE'. |
static java.lang.String |
NOT_MEMBER The constant for 'NOT MEMBER'. |
static java.lang.String |
NOT_MEMBER_OF The constant for 'NOT MEMBER OF'. |
static java.lang.String |
NULL The constant for 'NULL'. |
static java.lang.String |
NULLIF The constant for 'NULLIF'. |
static java.lang.String |
OBJECT The constant for 'OBJECT'. |
static java.lang.String |
OF The constant for 'OF'. |
static java.lang.String |
OR The constant for 'OR'. |
static java.lang.String |
ORDER_BY The constant for 'ORDER BY'. |
static java.lang.String |
OUTER The constant for 'OUTER'. |
static java.lang.String |
PLUS The constant for for the plus sign '+'. |
static java.lang.String |
POSITION The constant for 'POSITION', which is an unused keyword. |
static java.lang.String |
POSITIONAL_PARAMETER The constant for '?'. |
static java.lang.String |
QUOTE The constant for single quote. |
static java.lang.String |
SELECT The constant for 'SELECT'. |
static java.lang.String |
SET The constant for 'SET'. |
static java.lang.String |
SIZE The constant for 'SIZE'. |
static java.lang.String |
SOME The constant for 'SOME'. |
static java.lang.String |
SQRT The constant for 'SQRT'. |
static java.lang.String |
SUBSTRING The constant for 'SUBSTRING'. |
static java.lang.String |
SUM The constant for 'SUM'. |
static java.lang.String |
THEN The constant for 'THEN'. |
static java.lang.String |
TRAILING The constant for 'TRAILING'. |
static java.lang.String |
TREAT The constant for 'TREAT'. |
static java.lang.String |
TRIM The constant for 'TRIM'. |
static java.lang.String |
TRUE The constant for 'TRUE'. |
static java.lang.String |
TYPE The constant for 'TYPE'. |
static java.lang.String |
UNKNOWN The constant for 'UNKNOWN', which is an unused keyword. |
static java.lang.String |
UPDATE The constant for 'UPDATE'. |
static java.lang.String |
UPPER The constant for 'UPPER'. |
static java.lang.String |
VALUE The constant for 'VALUE'. |
static java.lang.String |
WHEN The constant for the identifier 'WHEN'. |
static java.lang.String |
WHERE The constant for 'WHERE'. |
Method Summary | |
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void |
accept(ExpressionVisitor visitor) Visits this Expression by the given visitor . |
void |
acceptChildren(ExpressionVisitor visitor) Visits the children of this Expression . |
java.util.ListIterator<Expression> |
children() Returns the children of this Expression . |
Expression[] |
getChildren() Returns the children of this Expression . |
Expression |
getParent() Returns the parent of this Expression . |
JPQLExpression |
getRoot() Retrieves the root node of the parsed tree hierarchy. |
boolean |
isAncestor(Expression expression) Determines whether this Expression is a parent of the given Expression . |
java.lang.String |
toActualText() Generates a string representation of this Expression , which needs to include any characters that are considered virtual, i.e. that was parsed when the query is incomplete and is needed for functionality like content assist. |
java.lang.String |
toParsedText() Returns a string representation of this Expression and its children. |
Field Detail |
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static final java.lang.String ABS
static final java.lang.String ALL
static final java.lang.String AND
static final java.lang.String ANY
static final java.lang.String AS
static final java.lang.String ASC
static final java.lang.String AVG
static final java.lang.String BETWEEN
static final java.lang.String BIT_LENGTH
static final java.lang.String BOTH
static final java.lang.String CASE
static final java.lang.String CHAR_LENGTH
static final java.lang.String CHARACTER_LENGTH
static final java.lang.String CLASS
static final java.lang.String COALESCE
static final java.lang.String CONCAT
static final java.lang.String COUNT
static final java.lang.String CURRENT_DATE
static final java.lang.String CURRENT_TIME
static final java.lang.String CURRENT_TIMESTAMP
static final java.lang.String DELETE
static final java.lang.String DELETE_FROM
static final java.lang.String DESC
static final java.lang.String DIFFERENT
static final java.lang.String DISTINCT
static final java.lang.String DIVISION
static final java.lang.String ELSE
static final java.lang.String EMPTY
static final java.lang.String END
static final java.lang.String ENTRY
static final java.lang.String EQUAL
static final java.lang.String ESCAPE
static final java.lang.String EXISTS
static final java.lang.String FALSE
static final java.lang.String FETCH
static final java.lang.String FROM
static final java.lang.String FUNC
static final java.lang.String GREATER_THAN
static final java.lang.String GREATER_THAN_OR_EQUAL
static final java.lang.String GROUP_BY
static final java.lang.String HAVING
static final java.lang.String IN
static final java.lang.String INDEX
static final java.lang.String INNER
static final java.lang.String INNER_JOIN
static final java.lang.String INNER_JOIN_FETCH
static final java.lang.String IS
static final java.lang.String IS_EMPTY
static final java.lang.String IS_NOT_EMPTY
static final java.lang.String IS_NOT_NULL
static final java.lang.String IS_NULL
static final java.lang.String JOIN
static final java.lang.String JOIN_FETCH
static final java.lang.String KEY
static final java.lang.String LEADING
static final java.lang.String LEFT
static final java.lang.String LEFT_JOIN
static final java.lang.String LEFT_JOIN_FETCH
static final java.lang.String LEFT_OUTER_JOIN
static final java.lang.String LEFT_OUTER_JOIN_FETCH
static final java.lang.String LENGTH
static final java.lang.String LIKE
static final java.lang.String LOCATE
static final java.lang.String LOWER
static final java.lang.String LOWER_THAN
static final java.lang.String LOWER_THAN_OR_EQUAL
static final java.lang.String MAX
static final java.lang.String MEMBER
static final java.lang.String MEMBER_OF
static final java.lang.String MIN
static final java.lang.String MINUS
static final java.lang.String MOD
static final java.lang.String MULTIPLICATION
static final java.lang.String NAMED_PARAMETER
static final java.lang.String NEW
static final java.lang.String NOT
static final java.lang.String NOT_BETWEEN
static final java.lang.String NOT_EXISTS
static final java.lang.String NOT_IN
static final java.lang.String NOT_LIKE
static final java.lang.String NOT_MEMBER
static final java.lang.String NOT_MEMBER_OF
static final java.lang.String NULL
static final java.lang.String NULLIF
static final java.lang.String OBJECT
static final java.lang.String OF
static final java.lang.String OR
static final java.lang.String ORDER_BY
static final java.lang.String OUTER
static final java.lang.String PLUS
static final java.lang.String POSITION
static final java.lang.String POSITIONAL_PARAMETER
static final java.lang.String QUOTE
static final java.lang.String SELECT
static final java.lang.String SET
static final java.lang.String SIZE
static final java.lang.String SOME
static final java.lang.String SQRT
static final java.lang.String SUBSTRING
static final java.lang.String SUM
static final java.lang.String THEN
static final java.lang.String TRAILING
static final java.lang.String TREAT
static final java.lang.String TRIM
static final java.lang.String TRUE
static final java.lang.String TYPE
static final java.lang.String UNKNOWN
static final java.lang.String UPDATE
static final java.lang.String UPPER
static final java.lang.String VALUE
static final java.lang.String WHEN
static final java.lang.String WHERE
Method Detail |
---|
void accept(ExpressionVisitor visitor)
Expression
by the given visitor
.visitor
- The visitor
to visit this objectvoid acceptChildren(ExpressionVisitor visitor)
Expression
. This method can be used to optimize traversing the children since a new list is not created every time children()
or getChildren()
is called.
This does not traverse the Expression
sub-hierarchy, use an subclass of AbstractTraverseChildrenVisitor
in order to traverse the entire sub-hierarchy.
visitor
- The visitor
to visit the children of this object.java.util.ListIterator<Expression> children()
Expression
.Expression
or an empty list if this Expression
does not have childrenExpression[] getChildren()
Expression
.Expression
or an empty list if this Expression
does not have childrenExpression getParent()
Expression
.null
except for the root of the treeJPQLExpression getRoot()
Expression
treeboolean isAncestor(Expression expression)
Expression
is a parent of the given Expression
.expression
- The Expression
to verify its paternity with this Expression
true
if this Expression
is the same as the given Expression
or one of its parent; false
otherwisejava.lang.String toActualText()
Expression
, which needs to include any characters that are considered virtual, i.e. that was parsed when the query is incomplete and is needed for functionality like content assist.Expression
java.lang.String toParsedText()
Expression
and its children. The expression should contain whitespace even if the beautified version would not have any. For instance, "SELECT e " should be returned where Expression#toText()
would return "SELECT e".Expression
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