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protected static interface AbstractContentAssistVisitor.CollectionExpressionHelper<T extends Expression>
This helper is used to determine how to add proposals within a collection of expressions. Each expression is usually separated by either a whitespace or by a comma.
| Method Summary | |
|---|---|
void |
addAtTheEndOfChild(T expression,
CollectionExpression collectionExpression,
int index,
boolean hasComma,
boolean virtualSpace)
Adds the proposals because the cursor is at the end of the child at the given position. |
void |
addIdentifier(T expression,
java.lang.String identifier)
Adds the given JPQL identifier as a valid proposal. |
void |
addTheBeginningOfChild(T expression,
CollectionExpression collectionExpression,
int index,
boolean hasComma)
Adds the proposals because the cursor is at the beginning of the child Expression
at the given position. |
CollectionExpression |
buildCollectionExpression(T expression)
Either returns the given Expression's child, which is already a CollectionExpression
or requests this helper to return a "virtual" CollectionExpression that is wrapping
the single element. |
boolean |
canContinue(T expression,
CollectionExpression collectionExpression,
int index)
Asks this helper if the search can continue even though two child expressions are not separated by a comma. |
boolean |
hasDelimiterAfterIdentifier(T expression)
Determines whether a delimiter like a whitespace or an open parenthesis was parsed after the identifier. |
int |
maxCollectionSize(T expression)
Returns the maximum number of encapsulated expressions the Expression
allows. |
int |
preExpressionLength(T expression)
Returns the length of anything that can be defined before the first child. |
JPQLQueryBNF |
queryBNF(T expression,
int index)
Returns the JPQLQueryBNF that defines the fragment at the given position. |
| Method Detail |
|---|
void addAtTheEndOfChild(T expression,
CollectionExpression collectionExpression,
int index,
boolean hasComma,
boolean virtualSpace)
expression - The Expression being visitedcollectionExpression - The CollectionExpression is either the child of the
given Expression or a temporary generated one that usually contains a single itemindex - The position of that child in the collection of childrenhasComma - Indicates whether a comma is present before the child at the given position;
if the index is 0, then this is false by defaultvirtualSpace - Indicates if this method is called because the cursor is at the end of
the child at the specified index but by considering there is a virtual space at the end of
that child
void addIdentifier(T expression,
java.lang.String identifier)
expression - The Expression being visitedidentifier - The JPQL identifier to add as a valid proposal
void addTheBeginningOfChild(T expression,
CollectionExpression collectionExpression,
int index,
boolean hasComma)
Expression
at the given position.
expression - The Expression being visitedcollectionExpression - The CollectionExpression is either the child of the
given Expression or a temporary generated one that usually contains a single item.
This can be null if the position is at the beginningindex - The position of the child that was scannedhasComma - Indicates whether a comma is present before the child at the given position;
if the index is 0, then this is false by defaultCollectionExpression buildCollectionExpression(T expression)
Expression's child, which is already a CollectionExpression
or requests this helper to return a "virtual" CollectionExpression that is wrapping
the single element.
expression - The parent of the children to retrieve
boolean canContinue(T expression,
CollectionExpression collectionExpression,
int index)
expression - The Expression being visitedcollectionExpression - The CollectionExpressionindex - The position of the child being scanned
true if the check can continue even though the previous child was not
separated by a comma; false to stop the checkboolean hasDelimiterAfterIdentifier(T expression)
expression - The Expression being visited
true if something is present; false otherwiseint maxCollectionSize(T expression)
expressions the Expression
allows. Some expression only allow 2, others 3 and others allow an unlimited number.
expression - The Expression for which its maximum number of children
int preExpressionLength(T expression)
DISTINCT " in "AVG(DISTINCT e.name)".
expression - The Expression being visited
JPQLQueryBNF queryBNF(T expression,
int index)
JPQLQueryBNF that defines the fragment at the given position.
expression - The Expression being visitedindex - The position of the element to retrieve the BNF defined in the JPQL grammar
JPQLQueryBNF that defines the fragment at the given position
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