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//$Id: SQLQueryImpl.java 10861 2006-11-22 00:11:25Z [email protected] $
package org.hibernate.impl;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.io.Serializable;

import org.hibernate.FlushMode;
import org.hibernate.HibernateException;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.QueryException;
import org.hibernate.SQLQuery;
import org.hibernate.ScrollMode;
import org.hibernate.ScrollableResults;
import org.hibernate.MappingException;
import org.hibernate.engine.query.sql.NativeSQLQuerySpecification;
import org.hibernate.engine.ResultSetMappingDefinition;
import org.hibernate.engine.NamedSQLQueryDefinition;
import org.hibernate.engine.QueryParameters;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.engine.query.ParameterMetadata;
import org.hibernate.engine.query.sql.NativeSQLQueryJoinReturn;
import org.hibernate.engine.query.sql.NativeSQLQueryScalarReturn;
import org.hibernate.engine.query.sql.NativeSQLQueryRootReturn;
import org.hibernate.engine.query.sql.NativeSQLQueryReturn;
import org.hibernate.type.Type;
import org.hibernate.util.CollectionHelper;
import org.hibernate.util.StringHelper;

/**
 * Implements SQL query passthrough.
 *
 *  * 
 * 
 *   SELECT {person}.NAME AS {person.name}, {person}.AGE AS {person.age}, {person}.SEX AS {person.sex}
 *   FROM PERSON {person} WHERE {person}.NAME LIKE 'Hiber%'
 * 
 * 
 *
 * @author Max Andersen
 */
public class SQLQueryImpl extends AbstractQueryImpl implements SQLQuery {

	private final List queryReturns;
	private Collection querySpaces;
	private final boolean callable;
	private boolean autodiscovertypes;

	/**
	 * Constructs a SQLQueryImpl given a sql query defined in the mappings.
	 *
	 * @param queryDef The representation of the defined .
	 * @param session The session to which this SQLQueryImpl belongs.
	 * @param parameterMetadata Metadata about parameters found in the query.
	 */
	SQLQueryImpl(NamedSQLQueryDefinition queryDef, SessionImplementor session, ParameterMetadata parameterMetadata) {
		super( queryDef.getQueryString(), queryDef.getFlushMode(), session, parameterMetadata );
		if ( queryDef.getResultSetRef() != null ) {
			ResultSetMappingDefinition definition = session.getFactory()
					.getResultSetMapping( queryDef.getResultSetRef() );
			if (definition == null) {
				throw new MappingException(
						"Unable to find resultset-ref definition: " +
						queryDef.getResultSetRef() 
					);
			}
			this.queryReturns = Arrays.asList( definition.getQueryReturns() );
		}
		else {
			this.queryReturns = Arrays.asList( queryDef.getQueryReturns() );
		}

		this.querySpaces = queryDef.getQuerySpaces();
		this.callable = queryDef.isCallable();
	}

	SQLQueryImpl(
			final String sql,
	        final List queryReturns,
	        final Collection querySpaces,
	        final FlushMode flushMode,
	        boolean callable,
	        final SessionImplementor session,
	        ParameterMetadata parameterMetadata) {
		// TODO : absolutely no usages of this constructor form; can it go away?
		super( sql, flushMode, session, parameterMetadata );
		this.queryReturns = queryReturns;
		this.querySpaces = querySpaces;
		this.callable = callable;
	}

	SQLQueryImpl(
			final String sql,
	        final String returnAliases[],
	        final Class returnClasses[],
	        final LockMode[] lockModes,
	        final SessionImplementor session,
	        final Collection querySpaces,
	        final FlushMode flushMode,
	        ParameterMetadata parameterMetadata) {
		// TODO : this constructor form is *only* used from constructor directly below us; can it go away?
		super( sql, flushMode, session, parameterMetadata );
		queryReturns = new ArrayList(returnAliases.length);
		for ( int i=0; i