Class ExistsExpression
- java.lang.Object
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- org.eclipse.persistence.jpa.jpql.parser.AbstractExpression
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- org.eclipse.persistence.jpa.jpql.parser.AbstractEncapsulatedExpression
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- org.eclipse.persistence.jpa.jpql.parser.AbstractSingleEncapsulatedExpression
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- org.eclipse.persistence.jpa.jpql.parser.ExistsExpression
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- All Implemented Interfaces:
Expression
public final class ExistsExpression extends AbstractSingleEncapsulatedExpression
An EXISTS expression is a predicate that istrue
only if the result of the subquery consists of one or more values and that isfalse
otherwise.BNF:exists_expression ::= [NOT] EXISTS(subquery)
- Since:
- 2.3
- Version:
- 2.5
- Author:
- Pascal Filion
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Field Summary
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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
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Fields inherited from interface org.eclipse.persistence.jpa.jpql.parser.Expression
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
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Constructor Summary
Constructors Constructor Description ExistsExpression(AbstractExpression parent)
Creates a newExistsExpression
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
accept(ExpressionVisitor visitor)
Visits thisExpression
by the givenvisitor
.String
getActualNotIdentifier()
Returns the actual NOT identifier found in the string representation of the JPQL query, which has the actual case that was used.String
getEncapsulatedExpressionQueryBNFId()
Returns the BNF used to parse the encapsulated expression.JPQLQueryBNF
getQueryBNF()
Returns the BNF of thisExpression
.boolean
hasNot()
Determines whether the identifier NOT was parsed.-
Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractSingleEncapsulatedExpression
acceptChildren, findQueryBNF, getExpression, hasEncapsulatedExpression, hasExpression, setExpression
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Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractEncapsulatedExpression
getActualIdentifier, getIdentifier, hasLeftParenthesis, hasRightParenthesis, hasSpaceAfterIdentifier
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Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractExpression
children, getGrammar, getIdentifierVersion, getLength, getOffset, getParent, getQueryBNF, getRoot, isAncestor, orderedChildren, populatePosition, toActualText, toParsedText, toString
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Constructor Detail
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ExistsExpression
public ExistsExpression(AbstractExpression parent)
Creates a newExistsExpression
.- Parameters:
parent
- The parent of this expression
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Method Detail
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accept
public void accept(ExpressionVisitor visitor)
Visits thisExpression
by the givenvisitor
.- Parameters:
visitor
- TheExpressionVisitor
to visit this object
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getEncapsulatedExpressionQueryBNFId
public String getEncapsulatedExpressionQueryBNFId()
Returns the BNF used to parse the encapsulated expression.- Specified by:
getEncapsulatedExpressionQueryBNFId
in classAbstractSingleEncapsulatedExpression
- Returns:
- The BNF used to parse the encapsulated expression
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getActualNotIdentifier
public String getActualNotIdentifier()
Returns the actual NOT identifier found in the string representation of the JPQL query, which has the actual case that was used.- Returns:
- The NOT identifier that was actually parsed, or an empty string if it was not parsed
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getQueryBNF
public JPQLQueryBNF getQueryBNF()
Returns the BNF of thisExpression
.- Returns:
- The
JPQLQueryBNF
, which represents the grammar of thisExpression
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hasNot
public boolean hasNot()
Determines whether the identifier NOT was parsed.- Returns:
true
if the identifier NOT was parsed;false
otherwise
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