/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2009 by Red Hat Inc and/or its affiliates or by
* third-party contributors as indicated by either @author tags or express
* copyright attribution statements applied by the authors. All
* third-party contributions are distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.ejb.criteria.expression;
import java.io.Serializable;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Collection;
import javax.persistence.criteria.Expression;
import javax.persistence.criteria.Predicate;
import org.hibernate.ejb.criteria.CriteriaBuilderImpl;
import org.hibernate.ejb.criteria.ExpressionImplementor;
import org.hibernate.ejb.criteria.expression.function.CastFunction;
/**
* Models an expression in the criteria query language.
*
* @author Steve Ebersole
*/
public abstract class ExpressionImpl<T>
extends SelectionImpl<T>
implements ExpressionImplementor<T>, Serializable {
public ExpressionImpl(CriteriaBuilderImpl criteriaBuilder, Class<T> javaType) {
super( criteriaBuilder, javaType );
}
/**
* {@inheritDoc}
*/
@SuppressWarnings({ "unchecked" })
public <X> Expression<X> as(Class<X> type) {
return type.equals( getJavaType() )
? (Expression<X>) this
: new CastFunction<X, T>( criteriaBuilder(), type, this );
}
/**
* {@inheritDoc}
*/
public Predicate isNull() {
return criteriaBuilder().isNull( this );
}
/**
* {@inheritDoc}
*/
public Predicate isNotNull() {
return criteriaBuilder().isNotNull( this );
}
/**
* {@inheritDoc}
*/
public Predicate in(Object... values) {
return criteriaBuilder().in( this, values );
}
/**
* {@inheritDoc}
*/
public Predicate in(Expression<?>... values) {
return criteriaBuilder().in( this, values );
}
/**
* {@inheritDoc}
*/
public Predicate in(Collection<?> values) {
return criteriaBuilder().in( this, values.toArray() );
}
/**
* {@inheritDoc}
*/
public Predicate in(Expression<Collection<?>> values) {
return criteriaBuilder().in( this, values );
}
/**
* {@inheritDoc}
*/
@SuppressWarnings({ "unchecked" })
public ExpressionImplementor<Long> asLong() {
resetJavaType( Long.class );
return (ExpressionImplementor<Long>) this;
}
/**
* {@inheritDoc}
*/
@SuppressWarnings({ "unchecked" })
public ExpressionImplementor<Integer> asInteger() {
resetJavaType( Integer.class );
return (ExpressionImplementor<Integer>) this;
}
/**
* {@inheritDoc}
*/
@SuppressWarnings({ "unchecked" })
public ExpressionImplementor<Float> asFloat() {
resetJavaType( Float.class );
return (ExpressionImplementor<Float>) this;
}
/**
* {@inheritDoc}
*/
@SuppressWarnings({ "unchecked" })
public ExpressionImplementor<Double> asDouble() {
resetJavaType( Double.class );
return (ExpressionImplementor<Double>) this;
}
/**
* {@inheritDoc}
*/
@SuppressWarnings({ "unchecked" })
public ExpressionImplementor<BigDecimal> asBigDecimal() {
resetJavaType( BigDecimal.class );
return (ExpressionImplementor<BigDecimal>) this;
}
/**
* {@inheritDoc}
*/
@SuppressWarnings({ "unchecked" })
public ExpressionImplementor<BigInteger> asBigInteger() {
resetJavaType( BigInteger.class );
return (ExpressionImplementor<BigInteger>) this;
}
/**
* {@inheritDoc}
*/
@SuppressWarnings({ "unchecked" })
public ExpressionImplementor<String> asString() {
resetJavaType( String.class );
return (ExpressionImplementor<String>) this;
}
}