public final class WhenClause extends AbstractExpression
when_clause ::= WHEN conditional_expression THEN scalar_expression
or
simple_when_clause ::= WHEN scalar_expression THEN scalar_expression
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, ASC, AVG, BETWEEN, BIT_LENGTH, BOTH, CASE, CHAR_LENGTH, CHARACTER_LENGTH, CLASS, COALESCE, CONCAT, COUNT, CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP, DELETE, DELETE_FROM, DESC, DIFFERENT, DISTINCT, DIVISION, ELSE, EMPTY, END, ENTRY, EQUAL, ESCAPE, EXISTS, FALSE, FETCH, FROM, FUNC, GREATER_THAN, GREATER_THAN_OR_EQUAL, GROUP_BY, HAVING, IN, INDEX, INNER, INNER_JOIN, INNER_JOIN_FETCH, IS, IS_EMPTY, IS_NOT_EMPTY, IS_NOT_NULL, IS_NULL, JOIN, JOIN_FETCH, KEY, 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_EXISTS, NOT_IN, NOT_LIKE, NOT_MEMBER, NOT_MEMBER_OF, NULL, NULLIF, OBJECT, OF, OR, ORDER_BY, OUTER, PLUS, POSITION, POSITIONAL_PARAMETER, QUOTE, SELECT, SET, SIZE, SOME, SQRT, SUBSTRING, SUM, THEN, TRAILING, TREAT, TRIM, TRUE, TYPE, UNKNOWN, UPDATE, UPPER, VALUE, WHEN, WHERE
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 |
getQueryBNF()
Returns the BNF of this
Expression . |
AbstractExpression |
getThenExpression()
Returns the
Expression representing the expression following the identifier THEN. |
AbstractExpression |
getWhenExpression()
Returns the
Expression representing the conditional predicate of the clause. |
boolean |
hasSpaceAfterThen()
Determines whether a whitespace was parsed after THEN.
|
boolean |
hasSpaceAfterWhen()
Determines whether a whitespace was parsed after WHEN.
|
boolean |
hasSpaceAfterWhenExpression()
Determines whether a whitespace was parsed after the conditional expression.
|
boolean |
hasThen()
Determines whether the identifier THEN was part of the query.
|
boolean |
hasThenExpression()
Determines whether the THEN expression of the query was parsed.
|
boolean |
hasWhenExpression()
Determines whether the conditional expression of the query was parsed.
|
children, findQueryBNF, getChildren, getParent, getRoot, identifierRole, identifiers, identifierVersion, isAncestor, isIdentifier, isVirtual, orderedChildren, queryBNF, toActualText, toParsedText, toString
public void accept(ExpressionVisitor visitor)
Expression
by the given visitor
.visitor
- The visitor
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()
or Expression.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.public JPQLQueryBNF getQueryBNF()
Expression
.getQueryBNF
in class AbstractExpression
JPQLQueryBNF
, which represents the grammar of this Expression
public AbstractExpression getThenExpression()
Expression
representing the expression following the identifier THEN.public AbstractExpression getWhenExpression()
Expression
representing the conditional predicate of the clause.public boolean hasSpaceAfterThen()
true
if there was a whitespace after THEN; false
otherwisepublic boolean hasSpaceAfterWhen()
true
if there was a whitespace after WHEN; false
otherwisepublic boolean hasSpaceAfterWhenExpression()
true
if there was a whitespace after the conditional expression;
false
otherwisepublic boolean hasThen()
true
if the identifier THEN was parsed; false
otherwisepublic boolean hasThenExpression()
true
the THEN expression was parsed; false
if nothing
was parsedpublic boolean hasWhenExpression()
true
the conditional expression was parsed; false
if nothing
was parsedEclipseLink 2.3.2, "build v20111125-r10461" API Reference