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java.lang.Objectorg.eclipse.persistence.jpa.jpql.parser.AbstractExpression
org.eclipse.persistence.jpa.jpql.parser.UnknownExpression
public final class UnknownExpression
This expression contains a portion of the query that is unknown to the parser. This can happen when the query is malformed or incomplete.
| Field Summary |
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| Fields inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractExpression |
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COMMA, DOT, DOUBLE_QUOTE, LEFT_CURLY_BRACKET, LEFT_PARENTHESIS, NOT_DEFINED, RIGHT_CURLY_BRACKET, RIGHT_PARENTHESIS, SINGLE_QUOTE, SPACE, UNDERSCORE |
| Constructor Summary | |
|---|---|
UnknownExpression(AbstractExpression parent,
java.lang.String text)
Creates a new UnknownExpression. |
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| Method Summary | |
|---|---|
void |
accept(ExpressionVisitor visitor)
Visits this Expression by the given visitor. |
void |
acceptChildren(ExpressionVisitor visitor)
Visits the children of this Expression. |
protected void |
addOrderedChildrenTo(java.util.List<Expression> children)
Adds the children of this AbstractExpression to the given list. |
JPQLQueryBNF |
findQueryBNF(AbstractExpression expression)
Retrieves the JPQLQueryBNF that was used to parse the given Expression. |
JPQLQueryBNF |
getQueryBNF()
Returns the BNF of this Expression. |
java.lang.String |
getText()
Returns the encapsulated text of this AbstractExpression, which can be used in various
ways, it can be a keyword, a literal, etc. |
protected boolean |
isUnknown()
Determines whether this expression is an unknown Expression or any other subclass. |
protected void |
parse(WordParser wordParser,
boolean tolerant)
Parses the query by starting at the current position, which is part of the given WordParser. |
java.lang.String |
toParsedText()
Returns a string representation of this Expression and its children. |
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 |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
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public UnknownExpression(AbstractExpression parent,
java.lang.String text)
UnknownExpression.
parent - The parent of this expressiontext - The text to be stored in this expression| Method Detail |
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public 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.protected 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 JPQLQueryBNF findQueryBNF(AbstractExpression expression)
JPQLQueryBNF that was used to parse the given Expression.
findQueryBNF in class AbstractExpressionexpression - The Expression for which its BNF is needed
JPQLQueryBNF that was used to parse the given expressionpublic JPQLQueryBNF getQueryBNF()
Expression.
JPQLQueryBNF, which represents the grammar of this Expressionpublic java.lang.String getText()
AbstractExpression, which can be used in various
ways, it can be a keyword, a literal, etc.
getText in class AbstractExpressionprotected boolean isUnknown()
Expression or any other subclass.
isUnknown in class AbstractExpressionfalse by default
protected 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 queriespublic java.lang.String toParsedText()
Expression and its children. The expression
should contain whitespace even if the beautified version would not have any. For instance,
"SELECT e " should be returned where Expression.toParsedText() would return "SELECT e".
toParsedText in interface ExpressiontoParsedText in class AbstractExpressionExpression
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
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