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EclipseLink 2.4.2, build 'v20130514-5956486' API Reference | ||||||||
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java.lang.Object org.eclipse.persistence.jpa.jpql.parser.AbstractExpression org.eclipse.persistence.jpa.jpql.parser.AbstractFromClause org.eclipse.persistence.jpa.jpql.parser.FromClause
public final class FromClause
The FROM clause of a query defines the domain of the query by declaring identification variables. An identification variable is an identifier declared in the FROM clause of a query. The domain of the query may be constrained by path expressions. Identification variables designate instances of a particular entity abstract schema type. The FROM clause can contain multiple identification variable declarations separated by a comma (,).
from_clause ::= FROM identification_variable_declaration {, {identification_variable_declaration | collection_member_declaration}}*
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 | |
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FromClause(AbstractExpression parent)
Creates a new FromClause . |
Method Summary | |
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void |
accept(ExpressionVisitor visitor)
Visits this Expression by the given visitor . |
java.lang.String |
declarationBNF()
Returns the BNF of the declaration part of this clause. |
JPQLQueryBNF |
getQueryBNF()
Returns the BNF of this Expression . |
Methods inherited from class org.eclipse.persistence.jpa.jpql.parser.AbstractFromClause |
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acceptChildren, addChildrenTo, addOrderedChildrenTo, buildCollectionExpression, findQueryBNF, getActualIdentifier, getDeclaration, hasDeclaration, hasSpaceAfterFrom, isParsingComplete, parse, shouldParseWithFactoryFirst, toParsedText |
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 FromClause(AbstractExpression parent)
FromClause
.
parent
- The parent of this expressionMethod Detail |
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public void accept(ExpressionVisitor visitor)
Expression
by the given visitor
.
visitor
- The ExpressionVisitor
to visit this objectpublic java.lang.String declarationBNF()
declarationBNF
in class AbstractFromClause
public JPQLQueryBNF getQueryBNF()
Expression
.
JPQLQueryBNF
, which represents the grammar of this Expression
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