org.hibernate.ejb.criteria.expression

Class ExpressionImpl<T>

java.lang.Object

org.hibernate.ejb.criteria.AbstractNode

org.hibernate.ejb.criteria.expression.AbstractTupleElement<X>

org.hibernate.ejb.criteria.expression.SelectionImpl<T>

org.hibernate.ejb.criteria.expression.ExpressionImpl<T>

All Implemented Interfaces:

Serializable, Expression<T>, Selection<T>, TupleElement<T>, ExpressionImplementor<T>, ParameterContainer, Renderable, SelectionImplementor<T>, TupleElementImplementor<T>

Direct Known Subclasses:

AbstractPathImpl, AbstractPredicateImpl, BasicFunctionExpression, BinaryArithmeticOperation, CoalesceExpression, ConcatExpression, CriteriaSubqueryImpl, EntityTypeExpression, ListIndexExpression, LiteralExpression, MapEntryExpression, NullifExpression, NullLiteralExpression, ParameterExpressionImpl, PathTypeExpression, SearchedCaseExpression, SimpleCaseExpression, SizeOfCollectionExpression, SubqueryComparisonModifierExpression, UnaryArithmeticOperation

public abstract class ExpressionImpl<T>
extends SelectionImpl<T>
implements ExpressionImplementor<T>, Serializable

Models an expression in the criteria query language.

Author:

Steve Ebersole

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.hibernate.ejb.criteria.ParameterContainer

ParameterContainer.Helper

Constructor Summary

Constructors

Constructor and Description
ExpressionImpl(CriteriaBuilderImpl criteriaBuilder, Class<T> javaType)

Method Summary

Methods

Modifier and Type	Method and Description
<X> Expression<X>	as(Class<X> type) Perform a typecast upon the expression, returning a new expression object.
ExpressionImplementor<BigDecimal>	asBigDecimal() See CriteriaBuilder.toBigDecimal(javax.persistence.criteria.Expression<? extends java.lang.Number>)
ExpressionImplementor<BigInteger>	asBigInteger() See CriteriaBuilder.toBigInteger(javax.persistence.criteria.Expression<? extends java.lang.Number>)
ExpressionImplementor<Double>	asDouble() See CriteriaBuilder.toDouble(javax.persistence.criteria.Expression<? extends java.lang.Number>)
ExpressionImplementor<Float>	asFloat() See CriteriaBuilder.toFloat(javax.persistence.criteria.Expression<? extends java.lang.Number>)
ExpressionImplementor<Integer>	asInteger() See CriteriaBuilder.toInteger(javax.persistence.criteria.Expression<? extends java.lang.Number>)
ExpressionImplementor<Long>	asLong() See CriteriaBuilder.toLong(javax.persistence.criteria.Expression<? extends java.lang.Number>)
ExpressionImplementor<String>	asString() See CriteriaBuilder.toString(javax.persistence.criteria.Expression<java.lang.Character>)
Predicate	in(Collection<?> values) Create a predicate to test whether the expression is a member of the collection.
Predicate	in(Expression<?>... values) Create a predicate to test whether the expression is a member of the argument list.
Predicate	in(Expression<Collection<?>> values) Create a predicate to test whether the expression is a member of the collection.
Predicate	in(Object... values) Create a predicate to test whether the expression is a member of the argument list.
Predicate	isNotNull() Create a predicate to test whether the expression is not null.
Predicate	isNull() Create a predicate to test whether the expression is null.

Methods inherited from class org.hibernate.ejb.criteria.expression.SelectionImpl

alias, getCompoundSelectionItems, getValueHandlers, isCompoundSelection

Methods inherited from class org.hibernate.ejb.criteria.expression.AbstractTupleElement

forceConversion, getAlias, getJavaType, getValueHandler, resetJavaType, setAlias

Methods inherited from class org.hibernate.ejb.criteria.AbstractNode

criteriaBuilder

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.hibernate.ejb.criteria.SelectionImplementor

getValueHandlers

Methods inherited from interface org.hibernate.ejb.criteria.TupleElementImplementor

getValueHandler

Methods inherited from interface javax.persistence.criteria.Selection

alias, getCompoundSelectionItems, isCompoundSelection

Methods inherited from interface javax.persistence.TupleElement

getAlias, getJavaType

Methods inherited from interface org.hibernate.ejb.criteria.Renderable

render, renderProjection

Methods inherited from interface org.hibernate.ejb.criteria.ParameterContainer

registerParameters

Constructor Detail

ExpressionImpl

public ExpressionImpl(CriteriaBuilderImpl criteriaBuilder,
              Class<T> javaType)

Method Detail

as

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

Perform a typecast upon the expression, returning a new expression object. This method does not cause type conversion: the runtime type is not changed. Warning: may result in a runtime failure.

Specified by:

as in interface Expression<T>

Parameters:

type - intended type of the expression

Returns:

new expression of the given type

isNull

public Predicate isNull()

Create a predicate to test whether the expression is null.

Specified by:

isNull in interface Expression<T>

Returns:

predicate testing whether the expression is null

isNotNull

public Predicate isNotNull()

Create a predicate to test whether the expression is not null.

Specified by:

isNotNull in interface Expression<T>

Returns:

predicate testing whether the expression is not null

in

public Predicate in(Object... values)

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

Specified by:

in in interface Expression<T>

Parameters:

values - values to be tested against

Returns:

predicate testing for membership

in

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

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

Specified by:

in in interface Expression<T>

Parameters:

values - expressions to be tested against

Returns:

predicate testing for membership

in

public Predicate in(Collection<?> values)

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

Specified by:

in in interface Expression<T>

Parameters:

values - collection of values to be tested against

Returns:

predicate testing for membership

in

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

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

Specified by:

in in interface Expression<T>

Parameters:

values - expression corresponding to collection to be tested against

Returns:

predicate testing for membership

asLong

public ExpressionImplementor<Long> asLong()

See CriteriaBuilder.toLong(javax.persistence.criteria.Expression<? extends java.lang.Number>)

Specified by:

asLong in interface ExpressionImplementor<T>

Returns:

this but as a long

asInteger

public ExpressionImplementor<Integer> asInteger()

See CriteriaBuilder.toInteger(javax.persistence.criteria.Expression<? extends java.lang.Number>)

Specified by:

asInteger in interface ExpressionImplementor<T>

Returns:

this but as an integer

asFloat

public ExpressionImplementor<Float> asFloat()

See CriteriaBuilder.toFloat(javax.persistence.criteria.Expression<? extends java.lang.Number>)

Specified by:

asFloat in interface ExpressionImplementor<T>

Returns:

this but as a float

asDouble

public ExpressionImplementor<Double> asDouble()

See CriteriaBuilder.toDouble(javax.persistence.criteria.Expression<? extends java.lang.Number>)

Specified by:

asDouble in interface ExpressionImplementor<T>

Returns:

this but as a double

asBigDecimal

public ExpressionImplementor<BigDecimal> asBigDecimal()

See CriteriaBuilder.toBigDecimal(javax.persistence.criteria.Expression<? extends java.lang.Number>)

Specified by:

asBigDecimal in interface ExpressionImplementor<T>

Returns:

this but as a BigDecimal

asBigInteger

public ExpressionImplementor<BigInteger> asBigInteger()

See CriteriaBuilder.toBigInteger(javax.persistence.criteria.Expression<? extends java.lang.Number>)

Specified by:

asBigInteger in interface ExpressionImplementor<T>

Returns:

this but as a BigInteger

asString

public ExpressionImplementor<String> asString()

See CriteriaBuilder.toString(javax.persistence.criteria.Expression<java.lang.Character>)

Specified by:

asString in interface ExpressionImplementor<T>

Returns:

this but as a string