org.hibernate.query.criteria.internal.expression.ExpressionImpl Maven / Gradle / Ivy

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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or .
 */
package org.hibernate.query.criteria.internal.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.query.criteria.internal.CriteriaBuilderImpl;
import org.hibernate.query.criteria.internal.ExpressionImplementor;
import org.hibernate.query.criteria.internal.expression.function.CastFunction;

/**
 * Models an expression in the criteria query language.
 *
 * @author Steve Ebersole
 */
public abstract class ExpressionImpl
		extends SelectionImpl
		implements ExpressionImplementor, Serializable {
	public ExpressionImpl(CriteriaBuilderImpl criteriaBuilder, Class javaType) {
		super( criteriaBuilder, javaType );
	}

	@Override
	@SuppressWarnings({ "unchecked" })
	public  Expression as(Class type) {
		return type.equals( getJavaType() )
				? (Expression) this
				: new CastFunction( criteriaBuilder(), type, this );
	}

	@Override
	public Predicate isNull() {
		return criteriaBuilder().isNull( this );
	}

	@Override
	public Predicate isNotNull() {
		return criteriaBuilder().isNotNull( this );
	}

	@Override
	public Predicate in(Object... values) {
		return criteriaBuilder().in( this, values );
	}

	@Override
	public Predicate in(Expression... values) {
		return criteriaBuilder().in( this, values );
	}

	@Override
	public Predicate in(Collection values) {
		return criteriaBuilder().in( this, values.toArray() );
	}

	@Override
	public Predicate in(Expression> values) {
		return criteriaBuilder().in( this, values );
	}

	@Override
	@SuppressWarnings({ "unchecked" })
	public ExpressionImplementor asLong() {
		resetJavaType( Long.class );
		return (ExpressionImplementor) this;
	}

	@Override
	@SuppressWarnings({ "unchecked" })
	public ExpressionImplementor asInteger() {
		resetJavaType( Integer.class );
		return (ExpressionImplementor) this;
	}

	@Override
	@SuppressWarnings({ "unchecked" })
	public ExpressionImplementor asFloat() {
		resetJavaType( Float.class );
		return (ExpressionImplementor) this;
	}

	@Override
	@SuppressWarnings({ "unchecked" })
	public ExpressionImplementor asDouble() {
		resetJavaType( Double.class );
		return (ExpressionImplementor) this;
	}

	@Override
	@SuppressWarnings({ "unchecked" })
	public ExpressionImplementor asBigDecimal() {
		resetJavaType( BigDecimal.class );
		return (ExpressionImplementor) this;
	}

	@Override
	@SuppressWarnings({ "unchecked" })
	public ExpressionImplementor asBigInteger() {
		resetJavaType( BigInteger.class );
		return (ExpressionImplementor) this;
	}

	@Override
	@SuppressWarnings({ "unchecked" })
	public ExpressionImplementor asString() {
		resetJavaType( String.class );
		return (ExpressionImplementor) this;
	}
}