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Oracle Fusion Middleware Java API Reference for Oracle TopLink 11g Release 1 (11.1.1) E28847-01 |
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java.lang.Object
org.eclipse.persistence.jpa.internal.jpql.parser.StringExpression
org.eclipse.persistence.jpa.internal.jpql.parser.AbstractExpression
org.eclipse.persistence.jpa.internal.jpql.parser.AbstractEncapsulatedExpression
org.eclipse.persistence.jpa.internal.jpql.parser.AbstractSingleEncapsulatedExpression
org.eclipse.persistence.jpa.internal.jpql.parser.TypeExpression
public final class TypeExpression
An entity type expression can be used to restrict query polymorphism. The TYPE operator returns the exact type of the argument.
Part of JPA 2.0.
type_discriminator ::= TYPE(identification_variable | single_valued_object_path_expression | input_parameter)
Field Summary |
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Fields inherited from class org.eclipse.persistence.jpa.internal.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 | |
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TypeExpression(AbstractExpression parent) Creates a new TypeExpression . |
Method Summary | |
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void |
accept(ExpressionVisitor visitor) Visits this Expression by the given visitor . |
java.lang.String |
encapsulatedExpressionBNF() Returns the BNF used to parse the encapsulated expression. |
JPQLQueryBNF |
getQueryBNF() Returns the BNF of this Expression . |
(package private) AbstractExpression |
parse(WordParser wordParser, JPQLQueryBNF queryBNF, boolean tolerant) Parses the given text by using the specified BNF. |
(package private) java.lang.String |
parseIdentifier(WordParser wordParser) Parses the identifier of this expression. |
Methods inherited from class org.eclipse.persistence.jpa.internal.jpql.parser.AbstractSingleEncapsulatedExpression |
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acceptChildren, addChildrenTo, addOrderedEncapsulatedExpressionTo, getExpression, hasEncapsulatedExpression, hasExpression, parseEncapsulatedExpression, setExpression, toParsedTextEncapsulatedExpression |
Methods inherited from class org.eclipse.persistence.jpa.internal.jpql.parser.AbstractEncapsulatedExpression |
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addOrderedChildrenTo, areLogicalIdentifiersSupported, getIdentifier, hasLeftParenthesis, hasRightParenthesis, isParsingComplete, parse, toParsedText |
Methods inherited from class org.eclipse.persistence.jpa.internal.jpql.parser.AbstractExpression |
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buildExpressionFromFallingBack, buildNullExpression, buildStringExpression, buildStringExpression, buildUnknownExpression, children, expressionFactory, expressionFactoryForIdentifier, findQueryBNF, getChildren, getJPAVersion, getParent, getRoot, getText, handleAggregate, identifierRole, identifiers, identifiers, identifierVersion, isAncestor, isIdentifier, isNull, isTolerant, isUnknown, isVirtual, orderedChildren, parseSingleExpression, populatePosition, queryBNF, readdLeadingSpaces, rebuildActualText, rebuildParsedText, setParent, setText, shouldParseWithFactoryFirst, shouldSkipLiteral, toActualText, toParsedText, toString |
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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TypeExpression(AbstractExpression parent)
TypeExpression
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parent
- The parent of this expressionMethod Detail |
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public void accept(ExpressionVisitor visitor)
Expression
by the given visitor
.visitor
- The visitor
to visit this objectpublic java.lang.String encapsulatedExpressionBNF()
encapsulatedExpressionBNF
in class AbstractSingleEncapsulatedExpression
public JPQLQueryBNF getQueryBNF()
Expression
.getQueryBNF
in class AbstractExpression
JPQLQueryBNF
, which represents the grammar of this Expression
AbstractExpression parse(WordParser wordParser, JPQLQueryBNF queryBNF, boolean tolerant)
parse
in class AbstractExpression
wordParser
- The text to parse based on the current position of the cursorqueryBNF
- The grammar used to retrieve the possible expression factories
tolerant
- Determines whether the parsing system should be tolerant, meaning if it should try to parse invalid or incomplete queriesExpression
representing the given sub-queryjava.lang.String parseIdentifier(WordParser wordParser)
parseIdentifier
in class AbstractEncapsulatedExpression
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