Class ExistsExpression
- java.lang.Object
-
- org.eclipse.persistence.jpa.jpql.parser.AbstractExpression
-
- org.eclipse.persistence.jpa.jpql.parser.AbstractEncapsulatedExpression
-
- org.eclipse.persistence.jpa.jpql.parser.AbstractSingleEncapsulatedExpression
-
- org.eclipse.persistence.jpa.jpql.parser.ExistsExpression
-
- All Implemented Interfaces:
Expression
public final class ExistsExpression extends AbstractSingleEncapsulatedExpression
An EXISTS expression is a predicate that istrueonly if the result of the subquery consists of one or more values and that isfalseotherwise.BNF:exists_expression ::= [NOT] EXISTS(subquery)- Version:
- 2.5
- Author:
- Pascal Filion
- Since:
- 2.3
-
-
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
-
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
-
-
Constructor Summary
Constructors Constructor Description ExistsExpression(AbstractExpression parent)Creates a newExistsExpression.
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidaccept(ExpressionVisitor visitor)Visits thisExpressionby the givenvisitor.java.lang.StringgetActualNotIdentifier()Returns the actual NOT identifier found in the string representation of the JPQL query, which has the actual case that was used.java.lang.StringgetEncapsulatedExpressionQueryBNFId()Returns the BNF used to parse the encapsulated expression.JPQLQueryBNFgetQueryBNF()Returns the BNF of thisExpression.booleanhasNot()Determines whether the identifier NOT was parsed.protected voidparse(WordParser wordParser, boolean tolerant)Parses the query by starting at the current position, which is part of the givenWordParser.protected AbstractExpressionparse(WordParser wordParser, java.lang.String queryBNFId, boolean tolerant)Parses the given text by using the specified BNF.-
Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractSingleEncapsulatedExpression
acceptChildren, addChildrenTo, addOrderedEncapsulatedExpressionTo, findQueryBNF, getExpression, hasEncapsulatedExpression, hasExpression, parseEncapsulatedExpression, removeEncapsulatedExpression, setExpression, toParsedTextEncapsulatedExpression
-
Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractEncapsulatedExpression
addOrderedChildrenTo, areLogicalIdentifiersSupported, getActualIdentifier, getIdentifier, hasLeftParenthesis, hasRightParenthesis, hasSpaceAfterIdentifier, isParsingComplete, shouldParseRightParenthesis, toParsedText
-
Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractExpression
acceptUnknownVisitor, acceptUnknownVisitor, buildExpressionFromFallingBack, buildNullExpression, buildStringExpression, buildStringExpression, buildUnknownExpression, calculatePosition, children, findFallBackExpressionFactory, getExpressionFactory, getExpressionRegistry, getGrammar, getIdentifierVersion, getJPAVersion, getLength, getOffset, getParent, getQueryBNF, getRoot, getText, handleAggregate, handleCollection, isAncestor, isIdentifier, isNull, isTolerant, isUnknown, isVirtual, orderedChildren, parseUsingExpressionFactory, populatePosition, rebuildActualText, rebuildParsedText, setParent, setText, shouldParseWithFactoryFirst, shouldSkipLiteral, toActualText, toParsedText, toString
-
-
-
-
Constructor Detail
-
ExistsExpression
public ExistsExpression(AbstractExpression parent)
Creates a newExistsExpression.- Parameters:
parent- The parent of this expression
-
-
Method Detail
-
accept
public void accept(ExpressionVisitor visitor)
Visits thisExpressionby the givenvisitor.- Parameters:
visitor- TheExpressionVisitorto visit this object
-
getEncapsulatedExpressionQueryBNFId
public java.lang.String getEncapsulatedExpressionQueryBNFId()
Returns the BNF used to parse the encapsulated expression.- Specified by:
getEncapsulatedExpressionQueryBNFIdin classAbstractSingleEncapsulatedExpression- Returns:
- The BNF used to parse the encapsulated expression
-
getActualNotIdentifier
public java.lang.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
-
getQueryBNF
public JPQLQueryBNF getQueryBNF()
Returns the BNF of thisExpression.- Returns:
- The
JPQLQueryBNF, which represents the grammar of thisExpression
-
hasNot
public boolean hasNot()
Determines whether the identifier NOT was parsed.- Returns:
trueif the identifier NOT was parsed;falseotherwise
-
parse
protected void parse(WordParser wordParser, boolean tolerant)
Parses the query by starting at the current position, which is part of the givenWordParser.- Overrides:
parsein classAbstractEncapsulatedExpression- Parameters:
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 queries
-
parse
protected AbstractExpression parse(WordParser wordParser, java.lang.String queryBNFId, boolean tolerant)
Parses the given text by using the specified BNF.- Overrides:
parsein classAbstractExpression- Parameters:
wordParser- The text to parse based on the current position of the cursorqueryBNFId- The unique identifier of theJPQLQueryBNFthat is used to determine how to parse the text at the current cursor position within the JPQL querytolerant- Determines whether the parsing system should be tolerant, meaning if it should try to parse invalid or incomplete queries- Returns:
- The
Expressionrepresenting the given sub-query
-
-