Class WhereClauseStateObject
- java.lang.Object
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- org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractStateObject
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- org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractConditionalClauseStateObject
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- org.eclipse.persistence.jpa.jpql.tools.model.query.WhereClauseStateObject
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- All Implemented Interfaces:
StateObject
public class WhereClauseStateObject extends AbstractConditionalClauseStateObject
TheWHEREclause of a query consists of a conditional expression used to select objects or values that satisfy the expression. TheWHEREclause restricts the result of a select statement or the scope of an update or delete operation.BNF:where_clause ::= WHERE conditional_expression- Version:
- 2.4
- See Also:
WhereClause- Author:
- Pascal Filion
- Since:
- 2.4
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Field Summary
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Fields inherited from class org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractConditionalClauseStateObject
CONDITIONAL_STATE_OBJECT_PROPERTY
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Constructor Summary
Constructors Constructor Description WhereClauseStateObject(AbstractModifyStatementStateObject parent)Creates a newWhereClauseStateObject.WhereClauseStateObject(AbstractSelectStatementStateObject parent)Creates a newWhereClauseStateObject.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidaccept(StateObjectVisitor visitor)Visits thisStateObjectby the givenvisitor.WhereClausegetExpression()Returns the actual parsed object if thisStateObjectrepresentation of the JPQL query was created by parsing an existing JPQL query.java.lang.StringgetIdentifier()Returns the JPQL identifier of this clause.voidsetExpression(WhereClause expression)Keeps a reference of theparsed objectobject, which should only be done when this object is instantiated during the conversion of a parsed JPQL query intoStateObjects.-
Methods inherited from class org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractConditionalClauseStateObject
addChildren, andParse, getBuilder, getConditional, hasConditional, isEquivalent, orParse, parse, setConditional, shouldEncapsulateORExpression, toTextInternal
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Methods inherited from class org.eclipse.persistence.jpa.jpql.tools.model.query.AbstractStateObject
acceptUnknownVisitor, acceptUnknownVisitor, addProblems, addPropertyChangeListener, areEquivalent, buildProblem, buildProblem, buildStateObject, buildStateObjects, checkParent, children, decorate, equals, findIdentificationVariable, firePropertyChanged, getChangeSupport, getDeclaration, getDecorator, getGrammar, getManagedTypeProvider, getParent, getQueryBuilder, getRoot, getType, getType, getTypeHelper, getTypeRepository, hashCode, initialize, isDecorated, parent, parent, parent, removePropertyChangeListener, setExpression, setParent, toString, toString, toStringInternal, toStringItems, toText
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Constructor Detail
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WhereClauseStateObject
public WhereClauseStateObject(AbstractModifyStatementStateObject parent)
Creates a newWhereClauseStateObject.- Parameters:
parent- The parent of this state object, which cannot benull- Throws:
java.lang.NullPointerException- The given parent cannot benull
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WhereClauseStateObject
public WhereClauseStateObject(AbstractSelectStatementStateObject parent)
Creates a newWhereClauseStateObject.- Parameters:
parent- The parent of this state object, which cannot benull- Throws:
java.lang.NullPointerException- The given parent cannot benull
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Method Detail
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accept
public void accept(StateObjectVisitor visitor)
Visits thisStateObjectby the givenvisitor.- Parameters:
visitor- Thevisitorto visit this object
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getExpression
public WhereClause getExpression()
Returns the actual parsed object if thisStateObjectrepresentation of the JPQL query was created by parsing an existing JPQL query.- Specified by:
getExpressionin interfaceStateObject- Overrides:
getExpressionin classAbstractStateObject- Returns:
- The parsed object when a JPQL query is parsed and converted into a
StateObjectornullwhen the JPQL query is manually created (i.e. not from a string)
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getIdentifier
public java.lang.String getIdentifier()
Returns the JPQL identifier of this clause.- Specified by:
getIdentifierin classAbstractConditionalClauseStateObject- Returns:
- The JPQL identifier of this conditional clause
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setExpression
public void setExpression(WhereClause expression)
Keeps a reference of theparsed objectobject, which should only be done when this object is instantiated during the conversion of a parsed JPQL query intoStateObjects.- Parameters:
expression- Theparsed objectrepresenting aWhereclause
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