public final class ResultVariable extends AbstractExpression
select_item ::= select_expression [[AS] result_variable]
COMMA, DOT, DOUBLE_QUOTE, LEFT_CURLY_BRACKET, LEFT_PARENTHESIS, NOT_DEFINED, RIGHT_CURLY_BRACKET, RIGHT_PARENTHESIS, SINGLE_QUOTE, SPACE, UNDERSCORE
ABS, ALL, AND, ANY, AS, AS_OF, ASC, AVG, BETWEEN, BIT_LENGTH, BOTH, CASE, CAST, CHAR_LENGTH, CHARACTER_LENGTH, CLASS, COALESCE, COLUMN, CONCAT, CONNECT_BY, COUNT, CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP, DELETE, DELETE_FROM, DESC, DIFFERENT, DISTINCT, DIVISION, ELSE, EMPTY, END, ENTRY, EQUAL, ESCAPE, EXCEPT, EXISTS, EXTRACT, FALSE, FETCH, FIRST, FROM, FUNC, FUNCTION, GREATER_THAN, GREATER_THAN_OR_EQUAL, GROUP_BY, HAVING, IN, INDEX, INNER, INNER_JOIN, INNER_JOIN_FETCH, INTERSECT, IS, IS_EMPTY, IS_NOT_EMPTY, IS_NOT_NULL, IS_NULL, JOIN, JOIN_FETCH, KEY, LAST, LEADING, LEFT, LEFT_JOIN, LEFT_JOIN_FETCH, LEFT_OUTER_JOIN, LEFT_OUTER_JOIN_FETCH, LENGTH, LIKE, LOCATE, LOWER, LOWER_THAN, LOWER_THAN_OR_EQUAL, MAX, MEMBER, MEMBER_OF, MIN, MINUS, MOD, MULTIPLICATION, NAMED_PARAMETER, NEW, NOT, NOT_BETWEEN, NOT_EQUAL, NOT_EXISTS, NOT_IN, NOT_LIKE, NOT_MEMBER, NOT_MEMBER_OF, NULL, NULLIF, NULLS, NULLS_FIRST, NULLS_LAST, OBJECT, OF, ON, OPERATOR, OR, ORDER_BY, ORDER_SIBLINGS_BY, OUTER, PLUS, POSITION, POSITIONAL_PARAMETER, QUOTE, REGEXP, SCN, SELECT, SET, SIZE, SOME, SQL, SQRT, START_WITH, SUBSTRING, SUM, TABLE, THEN, TIMESTAMP, TRAILING, TREAT, TRIM, TRUE, TYPE, UNION, UNKNOWN, UPDATE, UPPER, VALUE, WHEN, WHERE
Constructor and Description |
---|
ResultVariable(AbstractExpression parent,
AbstractExpression selectExpression)
Creates a new
ResultVariable . |
Modifier and Type | Method and Description |
---|---|
void |
accept(ExpressionVisitor visitor)
Visits this
Expression by the given visitor . |
void |
acceptChildren(ExpressionVisitor visitor)
Visits the children of this
Expression . |
JPQLQueryBNF |
findQueryBNF(Expression expression)
Retrieves the
JPQLQueryBNF that represents the fragment of this Expression
that was used when parsing the given Expression . |
java.lang.String |
getActualAsIdentifier()
Returns the actual AS found in the string representation of the JPQL query, which has
the actual case that was used.
|
JPQLQueryBNF |
getQueryBNF()
Returns the BNF of this
Expression . |
Expression |
getResultVariable()
Returns the
Expression representing the result variable. |
Expression |
getSelectExpression()
Returns the
Expression representing the select expression. |
boolean |
hasAs()
Determines whether the identifier AS was parsed or not.
|
boolean |
hasResultVariable()
Determines whether the result variable was parsed.
|
boolean |
hasSelectExpression()
Determines whether a select expression was defined for this result variable.
|
boolean |
hasSpaceAfterAs()
Determines whether a whitespace was parsed after the identifier AS.
|
children, getGrammar, getIdentifierVersion, getLength, getOffset, getParent, getQueryBNF, getRoot, isAncestor, orderedChildren, populatePosition, toActualText, toParsedText, toString
public ResultVariable(AbstractExpression parent, AbstractExpression selectExpression)
ResultVariable
.parent
- The parent of this expressionselectExpression
- The expression that represents the select expression, which will have
a variable assigned to itpublic void accept(ExpressionVisitor visitor)
Expression
by the given visitor
.visitor
- The ExpressionVisitor
to visit this objectpublic void acceptChildren(ExpressionVisitor visitor)
Expression
. This method can be used to optimize traversing
the children since a new list is not created every time Expression.children()
is called.
This does not traverse the Expression
sub-hierarchy, use a subclass of
AbstractTraverseChildrenVisitor
in order to traverse the entire sub-hierarchy.
visitor
- The visitor
to visit the children of this object.public JPQLQueryBNF findQueryBNF(Expression expression)
JPQLQueryBNF
that represents the fragment of this Expression
that was used when parsing the given Expression
.findQueryBNF
in interface Expression
findQueryBNF
in class AbstractExpression
expression
- The Expression
that is a descendant of this oneJPQLQueryBNF
that was used to parse the given expressionpublic java.lang.String getActualAsIdentifier()
public JPQLQueryBNF getQueryBNF()
Expression
.JPQLQueryBNF
, which represents the grammar of this Expression
public Expression getResultVariable()
Expression
representing the result variable.public Expression getSelectExpression()
Expression
representing the select expression.public boolean hasAs()
true
if the identifier AS was parsed; false
otherwisepublic boolean hasResultVariable()
true
if the result variable was parsed; false
otherwisepublic boolean hasSelectExpression()
true
if the select expression was parsed; false
if the
result variable was parsed without onepublic boolean hasSpaceAfterAs()
true
if there was a whitespace after AS; false
otherwiseEclipseLink 2.6.3, "build v20160428-59c81c5" API Reference