//$Id: CriteriaQuery.java,v 1.10 2005/05/31 20:24:39 oneovthafew Exp $
package org.hibernate.criterion;

import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.engine.TypedValue;
import org.hibernate.type.Type;

/**
 * An instance of <tt>CriteriaQuery</tt> is passed to criterion, 
 * order and projection instances when actually compiling and
 * executing the query. This interface is not used by application
 * code.
 * 
 * @author Gavin King
 */
public interface CriteriaQuery {
	public SessionFactoryImplementor getFactory();
	
	/**
	 * Get the names of the columns mapped by a property path,
	 * ignoring projection aliases
	 */
	public String getColumn(Criteria criteria, String propertyPath) 
	throws HibernateException;
	
	/**
	 * Get the type of a property path, ignoring projection aliases
	 */
	public Type getType(Criteria criteria, String propertyPath)
	throws HibernateException;

	/**
	 * Get the names of the columns mapped by a property path
	 */
	public String[] getColumnsUsingProjection(Criteria criteria, String propertyPath) 
	throws HibernateException;
	
	/**
	 * Get the type of a property path
	 */
	public Type getTypeUsingProjection(Criteria criteria, String propertyPath)
	throws HibernateException;

	/**
	 * Get the a typed value for the given property value.
	 */
	public TypedValue getTypedValue(Criteria criteria, String propertyPath, Object value) 
	throws HibernateException;
	
	/**
	 * Get the entity name of an entity
	 */
	public String getEntityName(Criteria criteria);
	
	/**
	 * Get the entity name of an entity, taking into account
	 * the qualifier of the property path
	 */
	public String getEntityName(Criteria criteria, String propertyPath);

	/**
	 * Get the root table alias of an entity
	 */
	public String getSQLAlias(Criteria subcriteria);

	/**
	 * Get the root table alias of an entity, taking into account
	 * the qualifier of the property path
	 */
	public String getSQLAlias(Criteria criteria, String propertyPath);
	
	/**
	 * Get the property name, given a possibly qualified property name
	 */
	public String getPropertyName(String propertyName);
	
	/**
	 * Get the identifier column names of this entity
	 */
	public String[] getIdentifierColumns(Criteria subcriteria);
	
	/**
	 * Get the identifier type of this entity
	 */
	public Type getIdentifierType(Criteria subcriteria);
	
	public TypedValue getTypedIdentifierValue(Criteria subcriteria, Object value);
	
	public String generateSQLAlias();
}