/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2010, Red Hat Inc. or third-party contributors as
 * indicated by the @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.criterion;

import java.util.ArrayList;

import org.hibernate.Criteria;
import org.hibernate.EntityMode;
import org.hibernate.engine.spi.TypedValue;
import org.hibernate.internal.util.StringHelper;
import org.hibernate.type.CompositeType;
import org.hibernate.type.Type;

Constrains the property to a specified list of values
Author:
Gavin King/**
 * Constrains the property to a specified list of values
 *
 * @author Gavin King
 */
public class InExpression implements Criterion {
	private final String propertyName;
	private final Object[] values;

	
Constructs an InExpression
Params:
propertyName – The property name to check
values – The values to check against
See Also:
Restrictions.in(String, Collection)
Restrictions.in(String, Object[])/**
	 * Constructs an InExpression
	 *
	 * @param propertyName The property name to check
	 * @param values The values to check against
	 *
	 * @see Restrictions#in(String, java.util.Collection)
	 * @see Restrictions#in(String, Object[])
	 */
	protected InExpression(String propertyName, Object[] values) {
		this.propertyName = propertyName;
		this.values = values;
	}

	@Override
	public String toSqlString( Criteria criteria, CriteriaQuery criteriaQuery ) {
		final String[] columns = criteriaQuery.findColumns( propertyName, criteria );
		if ( criteriaQuery.getFactory().getDialect().supportsRowValueConstructorSyntaxInInList() || columns.length <= 1 ) {
			String singleValueParam = StringHelper.repeat( "?, ", columns.length - 1 ) + "?";
			if ( columns.length > 1 ) {
				singleValueParam = '(' + singleValueParam + ')';
			}
			final String params = values.length > 0
					? StringHelper.repeat( singleValueParam + ", ", values.length - 1 ) + singleValueParam
					: "";
			String cols = StringHelper.join( ", ", columns );
			if ( columns.length > 1 ) {
				cols = '(' + cols + ')';
			}
			return cols + " in (" + params + ')';
		}
		else {
			String cols = " ( " + StringHelper.join( " = ? and ", columns ) + "= ? ) ";
			cols = values.length > 0
					? StringHelper.repeat( cols + "or ", values.length - 1 ) + cols
					: "";
			cols = " ( " + cols + " ) ";
			return cols;
		}
	}

	@Override
	public TypedValue[] getTypedValues(Criteria criteria, CriteriaQuery criteriaQuery) {
		final ArrayList<TypedValue> list = new ArrayList<TypedValue>();
		final Type type = criteriaQuery.getTypeUsingProjection( criteria, propertyName );
		if ( type.isComponentType() ) {
			final CompositeType compositeType = (CompositeType) type;
			final Type[] subTypes = compositeType.getSubtypes();
			for ( Object value : values ) {
				for ( int i = 0; i < subTypes.length; i++ ) {
					final Object subValue = value == null
							? null
							: compositeType.getPropertyValues( value, EntityMode.POJO )[i];
					list.add( new TypedValue( subTypes[i], subValue ) );
				}
			}
		}
		else {
			for ( Object value : values ) {
				list.add( new TypedValue( type, value ) );
			}
		}

		return list.toArray( new TypedValue[ list.size() ] );
	}

	@Override
	public String toString() {
		return propertyName + " in (" + StringHelper.toString( values ) + ')';
	}

}