Module org.eclipse.persistence.jpa

Package org.eclipse.persistence.internal.jpa.querydef

Class ExpressionImpl<X>

java.lang.Object

org.eclipse.persistence.internal.jpa.querydef.SelectionImpl<X>

org.eclipse.persistence.internal.jpa.querydef.ExpressionImpl<X>

All Implemented Interfaces:

Expression<X>, Selection<X>, TupleElement<X>, Serializable, InternalExpression, InternalSelection

Direct Known Subclasses:

FunctionExpressionImpl, ParameterExpressionImpl, PathImpl

public class ExpressionImpl<X>
extends SelectionImpl<X>
implements Expression<X>, InternalExpression

Purpose: Represents an Expression in the Criteria API heirarchy.

Description: Expressions are expression nodes that can not be joined from and may or not be the result of a Path expression.

Since:

EclipseLink 1.2

See Also:

• Expression
• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	isLiteral
protected Object	literal
protected Metamodel	metamodel

Fields inherited from class org.eclipse.persistence.internal.jpa.querydef.SelectionImpl

alias, currentNode, javaType

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ExpressionImpl(Metamodel metamodel, Class<X> javaType, Expression expressionNode)
	ExpressionImpl(Metamodel metamodel, Class<X> javaType, Expression expressionNode, Object value)

Method Summary

Modifier and Type	Method	Description
<T> Expression<T>	as(Class<T> type)
protected <T> Expression<T>	buildExpressionForAs(Class<T> type)
void	findRootAndParameters(CommonAbstractCriteriaImpl criteriaQuery)
Predicate	in(Expression<?>... values)	Apply a predicate to test whether the expression is a member of the argument list.
Predicate	in(Expression<Collection<?>> values)	Apply a predicate to test whether the expression is a member of the collection.
Predicate	in(Object... values)
Predicate	in(Collection<?> values)	Apply a predicate to test whether the expression is a member of the collection.
boolean	isCompoundExpression()
boolean	isExpression()
boolean	isJunction()
boolean	isLiteral()
Predicate	isNotNull()
Predicate	isNull()
boolean	isParameter()
boolean	isPredicate()
boolean	isSubquery()

Methods inherited from class org.eclipse.persistence.internal.jpa.querydef.SelectionImpl

alias, getAlias, getCompoundSelectionItems, getCurrentNode, getJavaType, isCompoundSelection, isConstructor, isFrom, isRoot, setJavaType

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface jakarta.persistence.criteria.Selection

alias, getCompoundSelectionItems, isCompoundSelection

Methods inherited from interface jakarta.persistence.TupleElement

getAlias, getJavaType

Field Details

metamodel

protected Metamodel metamodel

isLiteral

protected boolean isLiteral

literal

protected Object literal

Constructor Details

ExpressionImpl

protected ExpressionImpl(Metamodel metamodel,
 Class<X> javaType,
 Expression expressionNode)

ExpressionImpl

public ExpressionImpl(Metamodel metamodel,
 Class<X> javaType,
 Expression expressionNode,
 Object value)

Method Details

as

public <T> Expression<T> as(Class<T> type)

Specified by:

as in interface Expression<X>

buildExpressionForAs

protected <T> Expression<T> buildExpressionForAs(Class<T> type)

in

public Predicate in(Object... values)

Specified by:

in in interface Expression<X>

in

public Predicate in(Expression<?>... values)

Apply a predicate to test whether the expression is a member of the argument list.

Specified by:

in in interface Expression<X>

Returns:

predicate testing for membership

in

public Predicate in(Collection<?> values)

Apply a predicate to test whether the expression is a member of the collection.

Specified by:

in in interface Expression<X>

Parameters:

values - collection

Returns:

predicate testing for membership

in

public Predicate in(Expression<Collection<?>> values)

Apply a predicate to test whether the expression is a member of the collection.

Specified by:

in in interface Expression<X>

Parameters:

values - expression corresponding to collection

Returns:

predicate testing for membership

isNotNull

public Predicate isNotNull()

Specified by:

isNotNull in interface Expression<X>

isNull

public Predicate isNull()

Specified by:

isNull in interface Expression<X>

isPredicate

public boolean isPredicate()

Specified by:

isPredicate in interface InternalExpression

isSubquery

public boolean isSubquery()

Specified by:

isSubquery in interface InternalExpression

isCompoundExpression

public boolean isCompoundExpression()

Specified by:

isCompoundExpression in interface InternalExpression

isExpression

public boolean isExpression()

Specified by:

isExpression in interface InternalExpression

isJunction

public boolean isJunction()

Specified by:

isJunction in interface InternalExpression

isLiteral

public boolean isLiteral()

Specified by:

isLiteral in interface InternalExpression

isParameter

public boolean isParameter()

Specified by:

isParameter in interface InternalExpression

findRootAndParameters

public void findRootAndParameters(CommonAbstractCriteriaImpl criteriaQuery)

Specified by:

findRootAndParameters in interface InternalSelection