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:

java.io.Serializable, InternalExpression, InternalSelection

Direct Known Subclasses:

FunctionExpressionImpl, ParameterExpressionImpl, PathImpl

public class ExpressionImpl<X>
extends SelectionImpl<X>
implements 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

Author:

gyorke

See Also:

Expression, Serialized Form

Field Summary

Fields

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

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

alias, currentNode, javaType

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ExpressionImpl(Metamodel metamodel, java.lang.Class<X> javaType, org.eclipse.persistence.expressions.Expression expressionNode)
	ExpressionImpl(Metamodel metamodel, java.lang.Class<X> javaType, org.eclipse.persistence.expressions.Expression expressionNode, java.lang.Object value)

Method Summary

Modifier and Type	Method and Description
<T> <any>	as(java.lang.Class<T> type)
protected <T> <any>	buildExpressionForAs(java.lang.Class<T> type)
void	findRootAndParameters(CommonAbstractCriteriaImpl criteriaQuery)
Predicate	in(<any>... values) Apply a predicate to test whether the expression is a member of the argument list.
Predicate	in(<any> values) Apply a predicate to test whether the expression is a member of the collection.
Predicate	in(java.util.Collection<?> values) Apply a predicate to test whether the expression is a member of the collection.
Predicate	in(java.lang.Object... values)
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

Methods inherited from class java.lang.Object

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

Field Detail

metamodel

protected Metamodel metamodel

isLiteral

protected boolean isLiteral

literal

protected java.lang.Object literal

Constructor Detail

ExpressionImpl

protected ExpressionImpl(Metamodel metamodel,
                         java.lang.Class<X> javaType,
                         org.eclipse.persistence.expressions.Expression expressionNode)

ExpressionImpl

public ExpressionImpl(Metamodel metamodel,
                      java.lang.Class<X> javaType,
                      org.eclipse.persistence.expressions.Expression expressionNode,
                      java.lang.Object value)

Method Detail

as

public <T> <any> as(java.lang.Class<T> type)

buildExpressionForAs

protected <T> <any> buildExpressionForAs(java.lang.Class<T> type)

in

public Predicate in(java.lang.Object... values)

in

public Predicate in(<any>... values)

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

Parameters:

values -

Returns:

predicate testing for membership

in

public Predicate in(java.util.Collection<?> values)

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

Parameters:

values - collection

Returns:

predicate testing for membership

in

public Predicate in(<any> values)

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

Parameters:

values - expression corresponding to collection

Returns:

predicate testing for membership

isNotNull

public Predicate isNotNull()

isNull

public Predicate isNull()

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