|
EclipseLink 2.5.0, build 'v20130507-3faac2b' API Reference | ||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||
java.lang.Objectorg.eclipse.persistence.jpa.jpql.parser.AbstractExpression
org.eclipse.persistence.jpa.jpql.parser.AbstractOrderByClause
public abstract class AbstractOrderByClause
An ordering clause allows the objects or values that are returned by the query to be ordered.
orderby_clause ::= <identifier> orderby_item {, orderby_item}*
| Field Summary |
|---|
| Fields inherited from class org.eclipse.persistence.jpa.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 | |
|---|---|
protected |
AbstractOrderByClause(AbstractExpression parent,
java.lang.String identifier)
Creates a new AbstractOrderByClause. |
| Method Summary | |
|---|---|
void |
acceptChildren(ExpressionVisitor visitor)
Visits the children of this Expression. |
protected void |
addChildrenTo(java.util.Collection<Expression> children)
Adds the children of this AbstractExpression to the given collection. |
protected void |
addOrderedChildrenTo(java.util.List<Expression> children)
Adds the children of this AbstractExpression to the given list. |
CollectionExpression |
buildCollectionExpression()
Creates a new CollectionExpression that will wrap the single order by item. |
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 |
getActualIdentifier()
Returns the actual identifier found in the string representation of the JPQL query, which has the actual case that was used. |
Expression |
getOrderByItems()
Returns the Expression representing the list of items to order. |
boolean |
hasOrderByItems()
Determines whether the list of items to order was parsed. |
boolean |
hasSpaceAfterIdentifier()
Determines whether a whitespace was parsed after the identifier. |
protected void |
parse(WordParser wordParser,
boolean tolerant)
Parses the query by starting at the current position, which is part of the given WordParser. |
protected void |
toParsedText(java.lang.StringBuilder writer,
boolean actual)
Generates a string representation of this Expression, including its children,
if it has any. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Methods inherited from interface org.eclipse.persistence.jpa.jpql.parser.Expression |
|---|
accept, getQueryBNF |
| Constructor Detail |
|---|
protected AbstractOrderByClause(AbstractExpression parent, java.lang.String identifier)
AbstractOrderByClause.
parent - The parent of this expressionidentifier - The JPQL identifier representing an ordering clause| Method Detail |
|---|
public 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.protected void addChildrenTo(java.util.Collection<Expression> children)
AbstractExpression to the given collection.
addChildrenTo in class AbstractExpressionchildren - The collection used to store the childrenprotected void addOrderedChildrenTo(java.util.List<Expression> children)
AbstractExpression to the given list.
addOrderedChildrenTo in class AbstractExpressionchildren - The list used to store the string representation of this AbstractExpressionpublic final CollectionExpression buildCollectionExpression()
CollectionExpression that will wrap the single order by item.
public final JPQLQueryBNF findQueryBNF(Expression expression)
JPQLQueryBNF that represents the fragment of this Expression
that was used when parsing the given Expression.
findQueryBNF in interface ExpressionfindQueryBNF in class AbstractExpressionexpression - The Expression that is a descendant of this one
JPQLQueryBNF that was used to parse the given expressionpublic final java.lang.String getActualIdentifier()
public final Expression getOrderByItems()
Expression representing the list of items to order.
public final boolean hasOrderByItems()
true the list of items to order was parsed; false otherwisepublic final boolean hasSpaceAfterIdentifier()
true if a whitespace was parsed after the identifier; false otherwiseprotected void parse(WordParser wordParser, boolean tolerant)
WordParser.
parse in class AbstractExpressionwordParser - 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 queries
protected void toParsedText(java.lang.StringBuilder writer,
boolean actual)
Expression, including its children,
if it has any.
toParsedText in class AbstractExpressionwriter - The buffer used to append this Expression's string representationactual - Determines whether the string representation should represent what was parsed,
i.e. include any "virtual" whitespace (such as ending whitespace) and the actual case of the
JPQL identifiers
|
EclipseLink 2.5.0, build 'v20130507-3faac2b' API Reference | ||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||