|
Oracle Fusion Middleware Java API Reference for Oracle TopLink 11g Release 1 (11.1.1) E28847-01 |
||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object
org.eclipse.persistence.jpa.internal.jpql.parser.StringExpression
org.eclipse.persistence.jpa.internal.jpql.parser.AbstractExpression
org.eclipse.persistence.jpa.internal.jpql.parser.OrderByClause
public final class OrderByClause
The ORDER BY clause allows the objects or values that are returned by the query to be ordered.
orderby_clause ::= ORDER BY orderby_item
{, orderby_item
}*
Field Summary | |
---|---|
private boolean |
hasSpaceAfterOrderBy Determines whether a whitespace was parsed after ORDER BY. |
private AbstractExpression |
orderByItems The order by items. |
Fields inherited from class org.eclipse.persistence.jpa.internal.jpql.parser.AbstractExpression |
---|
COMMA, DOT, DOUBLE_QUOTE, LEFT_CURLY_BRACKET, LEFT_PARENTHESIS, NOT_DEFINED, RIGHT_CURLY_BRACKET, RIGHT_PARENTHESIS, SINGLE_QUOTE, SPACE, UNDERSCORE |
Constructor Summary | |
---|---|
OrderByClause(AbstractExpression parent) Creates a new OrderByClause . |
Method Summary | |
---|---|
void |
accept(ExpressionVisitor visitor) Visits this Expression by the given visitor . |
void |
acceptChildren(ExpressionVisitor visitor) Visits the children of this Expression . |
(package private) void |
addChildrenTo(java.util.Collection<Expression> children) Adds the children of this Expression to the given collection. |
(package private) void |
addOrderedChildrenTo(java.util.List<StringExpression> children) Adds the StringExpressions representing this Expression . |
CollectionExpression |
buildCollectionExpression() Creates a new CollectionExpression that will wrap the single order by item. |
Expression |
getOrderByItems() Returns the Expression representing the list of items to order. |
JPQLQueryBNF |
getQueryBNF() Returns the BNF of this Expression . |
boolean |
hasOrderByItems() Determines whether the list of items to order was parsed. |
boolean |
hasSpaceAfterOrderBy() Determines whether a whitespace was parsed after ORDER BY. |
(package private) void |
parse(WordParser wordParser, boolean tolerant) Parses the query by starting at the current position, which is part of the given WordParser . |
(package private) void |
toParsedText(java.lang.StringBuilder writer, boolean includeVirtual) Generates a string representation of this Expression . |
Methods inherited from class org.eclipse.persistence.jpa.internal.jpql.parser.AbstractExpression |
---|
buildExpressionFromFallingBack, buildNullExpression, buildStringExpression, buildStringExpression, buildUnknownExpression, children, expressionFactory, expressionFactoryForIdentifier, findQueryBNF, getChildren, getJPAVersion, getParent, getRoot, getText, handleAggregate, identifierRole, identifiers, identifiers, identifierVersion, isAncestor, isIdentifier, isNull, isParsingComplete, isTolerant, isUnknown, isVirtual, orderedChildren, parse, parseSingleExpression, populatePosition, queryBNF, readdLeadingSpaces, rebuildActualText, rebuildParsedText, setParent, setText, shouldParseWithFactoryFirst, shouldSkipLiteral, toActualText, toParsedText, toString |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
---|
private boolean hasSpaceAfterOrderBy
private AbstractExpression orderByItems
Constructor Detail |
---|
OrderByClause(AbstractExpression parent)
OrderByClause
.
parent
- The parent of this expressionMethod Detail |
---|
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.void addChildrenTo(java.util.Collection<Expression> children)
Expression
to the given collection.addChildrenTo
in class AbstractExpression
children
- The collection used to store the childrenvoid addOrderedChildrenTo(java.util.List<StringExpression> children)
StringExpressions
representing this Expression
.addOrderedChildrenTo
in class AbstractExpression
children
- The list used to store the string representation of this Expression
public CollectionExpression buildCollectionExpression()
CollectionExpression
that will wrap the single order by item.public Expression getOrderByItems()
Expression
representing the list of items to order.public JPQLQueryBNF getQueryBNF()
Expression
.getQueryBNF
in class AbstractExpression
JPQLQueryBNF
, which represents the grammar of this Expression
public boolean hasOrderByItems()
true
the list of items to order was parsed; false
otherwisepublic boolean hasSpaceAfterOrderBy()
true
if a whitespace was parsed after ORDER BY; false
otherwisevoid parse(WordParser wordParser, boolean tolerant)
WordParser
.parse
in class AbstractExpression
wordParser
- The text to parse based on the current position of the cursortolerant
- Determines whether the parsing system should be tolerant, meaning if it should try to parse invalid or incomplete queriesvoid toParsedText(java.lang.StringBuilder writer, boolean includeVirtual)
Expression
.toParsedText
in class AbstractExpression
writer
- The buffer used to append this Expression
's string representationincludeVirtual
- Determines whether 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
|
|
||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |