public final class WhenClause extends AbstractExpression
when_clause ::= WHEN conditional_expression THEN scalar_expression
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, 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 |
---|
WhenClause(AbstractExpression parent)
Creates a new
WhenClause . |
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 . |
CollectionExpression |
buildWhenCollectionExpression()
Creates a new
CollectionExpression that will wrap the single WHEN
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 |
getActualThenIdentifier()
Returns the actual THEN found in the string representation of the JPQL query, which
has the actual case that was used.
|
java.lang.String |
getActualWhenIdentifier()
Returns the actual WHEN 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 . |
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, getGrammar, getIdentifierVersion, getLength, getOffset, getParent, getQueryBNF, getRoot, isAncestor, orderedChildren, populatePosition, toActualText, toParsedText, toString
public WhenClause(AbstractExpression parent)
WhenClause
.parent
- The parent of this expressionpublic 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 CollectionExpression buildWhenCollectionExpression()
CollectionExpression
that will wrap the single WHEN
expression.WHEN
expression represented by a temporary collectionpublic 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 getActualThenIdentifier()
public java.lang.String getActualWhenIdentifier()
public JPQLQueryBNF getQueryBNF()
Expression
.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 2.6.3, "build v20160428-59c81c5" API Reference