querytranslatortestcase.java

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// $Id: QueryTranslatorTestCase.java 10060 2006-06-28 02:53:39Z [e-mail] $
package org.hibernate.test.hql;

import java.sql.Connection;
import java.sql.ParameterMetaData;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.TreeMap;

import junit.framework.ComparisonFailure;

import org.hibernate.EntityMode;
import org.hibernate.MappingException;
import org.hibernate.QueryException;
import org.hibernate.classic.Session;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.engine.query.HQLQueryPlan;
import org.hibernate.hql.QueryTranslator;
import org.hibernate.hql.QueryTranslatorFactory;
import org.hibernate.hql.ast.ASTQueryTranslatorFactory;
import org.hibernate.hql.ast.HqlToken;
import org.hibernate.hql.ast.QueryTranslatorImpl;
import org.hibernate.hql.ast.util.ASTPrinter;
import org.hibernate.hql.classic.ClassicQueryTranslatorFactory;
import org.hibernate.test.TestCase;
import org.hibernate.type.Type;
import org.hibernate.type.TypeFactory;
import org.hibernate.util.StringHelper;

/**
 * Test case superclass for testing QueryTranslator implementations.
 *
 * @author josh Dec 6, 2004 8:21:21 AM
 */
public abstract class QueryTranslatorTestCase extends TestCase {
	public QueryTranslatorTestCase(String x) {
		super( x );
		// Create an instance of HqlToken, so that it will have an entry point outside the package.  This
		// will stop IDEA's code inspector from suggesting that HqlToken should be package local.
		new HqlToken();
	}

	public void assertTranslation(String hql) throws QueryException, MappingException {
		assertTranslation( hql, null );
	}

	public void assertTranslation(String hql, boolean scalar) throws QueryException, MappingException {
		assertTranslation( hql, null, scalar, null );
	}

	protected void assertTranslation(String hql, HashMap replacements) {
		ComparisonFailure cf = null;
		try {
			assertTranslation( hql, replacements, false, null );
		}
		catch ( ComparisonFailure e ) {
			e.printStackTrace();
			cf = e;
		}
		if ("false".equals(System.getProperty("org.hibernate.test.hql.SkipScalarQuery","false"))) {
			// Run the scalar translation anyway, even if there was a comparison failure.
			assertTranslation( hql, replacements, true, null );
		}
		if (cf != null)
			throw cf;
	}

	protected void runClassicTranslator(String hql) throws Exception {
		SessionFactoryImplementor factory = getSessionFactoryImplementor();
		Map replacements = new HashMap();
		QueryTranslator oldQueryTranslator = null;
		try {
			QueryTranslatorFactory classic = new ClassicQueryTranslatorFactory();
			oldQueryTranslator = classic.createQueryTranslator( hql, hql, Collections.EMPTY_MAP, factory );
			oldQueryTranslator.compile( replacements, false );
		}
		catch ( Exception e ) {
			e.printStackTrace();
			throw e;
		}
		String oldsql = oldQueryTranslator.getSQLString();
		System.out.println( "HQL    : " + hql );
		System.out.println( "OLD SQL: " + oldsql );
	}

	protected void assertTranslation(String hql, HashMap replacements, boolean scalar, String sql) {
		SessionFactoryImplementor factory = getSessionFactoryImplementor();

		// Create an empty replacements map if we don't have one.
		if ( replacements == null ) {
			replacements = new HashMap();
		}

		// steve -> note that the empty maps here represent the currently enabled filters...
		QueryTranslator oldQueryTranslator = null;
		Exception oldException = null;
		try {
			System.out.println("Compiling with classic QueryTranslator...");
			QueryTranslatorFactory classic = new ClassicQueryTranslatorFactory();
			oldQueryTranslator = classic.createQueryTranslator( hql, hql, Collections.EMPTY_MAP, factory );
			oldQueryTranslator.compile( replacements, scalar );
		}
		catch ( QueryException e ) {
			oldException = e;
		}
		catch ( MappingException e ) {
			oldException = e;
		}

		QueryTranslator newQueryTranslator = null;
		Exception newException = null;
		try {
			System.out.println("Compiling with AST QueryTranslator...");
			newQueryTranslator = createNewQueryTranslator( hql, replacements, scalar );
		}
		catch ( QueryException e ) {
			newException = e;
		}
		catch ( MappingException e ) {
			newException = e;
		}

		// If the old QT threw an exception, the new one should too.
		if ( oldException != null ) {
//			oldException.printStackTrace();
			assertNotNull( "New query translator did *NOT* throw an exception, the old one did : " + oldException, newException );
			assertEquals( oldException.getMessage(), newException.getMessage() );
			return;	// Don't bother with the rest of the assertions.
		}
		else if ( newException != null ) {
			newException.printStackTrace();
			assertNull( "Old query translator did not throw an exception, the new one did", newException );
		}

		// -- check all of the outputs --
		checkSql( oldQueryTranslator, newQueryTranslator, hql, scalar, sql );
		checkQuerySpaces( oldQueryTranslator, newQueryTranslator );
		checkReturnedTypes( oldQueryTranslator, newQueryTranslator );
		checkColumnNames( oldQueryTranslator, newQueryTranslator );

	}

	protected QueryTranslatorImpl createNewQueryTranslator(String hql, HashMap replacements, boolean scalar) {
		SessionFactoryImplementor factory = getSessionFactoryImplementor();
		return createNewQueryTranslator( hql, replacements, scalar, factory );
	}

	private QueryTranslatorImpl createNewQueryTranslator(String hql, HashMap replacements, boolean scalar, SessionFactoryImplementor factory) {
		QueryTranslatorFactory ast = new ASTQueryTranslatorFactory();
		QueryTranslatorImpl newQueryTranslator = ( QueryTranslatorImpl ) ast.createQueryTranslator( hql, hql, Collections.EMPTY_MAP, factory );
		newQueryTranslator.compile( replacements, scalar );
		return newQueryTranslator;
	}

	protected QueryTranslatorImpl createNewQueryTranslator(String hql) {
		return createNewQueryTranslator( hql, new HashMap(), false );
	}

	protected QueryTranslatorImpl createNewQueryTranslator(String hql, SessionFactoryImplementor sfimpl) {
		return createNewQueryTranslator( hql, new HashMap(), false, sfimpl );
	}

	protected HQLQueryPlan createQueryPlan(String hql, boolean scalar) {
		return new HQLQueryPlan( hql, scalar, Collections.EMPTY_MAP, getSessionFactoryImplementor() );
	}

	protected HQLQueryPlan createQueryPlan(String hql) {
		return createQueryPlan( hql, false );
	}

	protected SessionFactoryImplementor getSessionFactoryImplementor() {
		SessionFactoryImplementor factory = ( SessionFactoryImplementor ) getSessions();
		if ( factory == null ) {
			throw new NullPointerException( "Unable to create factory!" );
		}
		return factory;
	}

	private void checkColumnNames(QueryTranslator oldQueryTranslator, QueryTranslator newQueryTranslator) {
		// Check the column names.

		String[][] oldColumnNames = oldQueryTranslator.getColumnNames();
		String[][] newColumnNames = newQueryTranslator.getColumnNames();
		/*assertEquals( "Column name array is not the right length!", oldColumnNames.length, newColumnNames.length );
		for ( int i = 0; i < oldColumnNames.length; i++ ) {
			assertEquals( "Column name array [" + i + "] is not the right length!", oldColumnNames[i].length, newColumnNames[i].length );
			for ( int j = 0; j < oldColumnNames[i].length; j++ ) {
				assertEquals( "Column name [" + i + "," + j + "]", oldColumnNames[i][j], newColumnNames[i][j] );
			}
		}*/
	}

	private void checkReturnedTypes(QueryTranslator oldQueryTranslator, QueryTranslator newQueryTranslator) {
		// Check the returned types for a regression.
		Type[] oldReturnTypes = oldQueryTranslator.getReturnTypes();
		Type[] returnTypes = newQueryTranslator.getReturnTypes();
		assertEquals( "Return types array is not the right length!", oldReturnTypes.length, returnTypes.length );
		for ( int i = 0; i < returnTypes.length; i++ ) {
			assertNotNull( returnTypes[i] );
			assertNotNull( oldReturnTypes[i] );
			assertEquals( "Returned types did not match!", oldReturnTypes[i].getReturnedClass(), returnTypes[i].getReturnedClass() );
			System.out.println("returnedType[" + i + "] = " + returnTypes[i] + " oldReturnTypes[" + i + "] = " + oldReturnTypes[i]);
		}
	}

	private void checkQuerySpaces(QueryTranslator oldQueryTranslator, QueryTranslator newQueryTranslator) {
		// Check the query spaces for a regression.
		Set oldQuerySpaces = oldQueryTranslator.getQuerySpaces();
		Set querySpaces = newQueryTranslator.getQuerySpaces();
		assertEquals( "Query spaces is not the right size!", oldQuerySpaces.size(), querySpaces.size() );
		for ( Iterator iterator = oldQuerySpaces.iterator(); iterator.hasNext(); ) {
			Object o = iterator.next();
			assertTrue( "New query space does not contain " + o + "!", querySpaces.contains( o ) );
		}
	}

	protected Exception compileBadHql(String hql, boolean scalar) {
		QueryTranslator newQueryTranslator;
		Map replacements = null;
		Exception newException = null;
		SessionFactoryImplementor factory = getSessionFactoryImplementor();
		try {
			QueryTranslatorFactory ast = new ASTQueryTranslatorFactory();
			newQueryTranslator = ast.createQueryTranslator( hql, hql, Collections.EMPTY_MAP, factory );
			newQueryTranslator.compile( replacements, scalar );
		}
		catch ( QueryException e ) {
			newException = e;
		}
		catch ( MappingException e ) {
			newException = e;
		}
		assertNotNull( "Expected exception from compilation of '" + hql + "'!", newException );
		return newException;
	}

	private void checkSql(QueryTranslator oldQueryTranslator, QueryTranslator newQueryTranslator, String hql, boolean scalar, String sql) {

		String oldsql = oldQueryTranslator.getSQLString();
		String newsql = newQueryTranslator.getSQLString();
		System.out.println( "HQL    : " + ASTPrinter.escapeMultibyteChars(hql) );
		System.out.println( "OLD SQL: " + ASTPrinter.escapeMultibyteChars(oldsql) );
		System.out.println( "NEW SQL: " + ASTPrinter.escapeMultibyteChars(newsql) );
		if ( sql == null ) {
			// Check the generated SQL.                                          ASTPrinter.escapeMultibyteChars(
			assertSQLEquals( "SQL is not the same as the old SQL (scalar=" + scalar + ")", oldsql, newsql );
		}
		else {
			assertSQLEquals( "SQL is not the same as the expected SQL (scalar=" + scalar + ")", sql, newsql );
		}
	}

	private void assertSQLEquals(String message, String oldsql, String newsql) {
		Map oldMap = getTokens(oldsql);
		Map newMap = getTokens(newsql);
		if ( !oldMap.equals(newMap) ) {
			assertEquals(message, oldsql, newsql);			
		}
		
		//String oldsqlStripped = stripExtraSpaces( oldsql );
		//String newsqlStripped = stripExtraSpaces( newsql );
		//assertEquals( message, oldsqlStripped, newsqlStripped );
	}