 /**
 * Derby - org.apache.derbyTesting.functionTests.tests.jdbc4.UnsupportedVetter
 *
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
 *
 */

package org.apache.derbyTesting.functionTests.tests.jdbc4;

import java.io.*;
import java.sql.*;
import javax.sql.*;

import java.lang.reflect.*;
import java.util.*;
import junit.framework.*;

import java.net.URL;

import org.apache.derbyTesting.functionTests.util.TestUtil;
import org.apache.derbyTesting.junit.BaseJDBCTestCase;
import org.apache.derbyTesting.junit.J2EEDataSource;
import org.apache.derbyTesting.junit.JDBC;
import org.apache.derbyTesting.junit.JDBCDataSource;
import org.apache.derbyTesting.junit.TestConfiguration;

/**
 * JUnit test which checks that only expected methods throw
 * SQLFeatureNotSupporteException. As currently compiled, this class
 * does not object to a handful of mandatory LOB-supporting methods which Derby
 * does not implement. You can expose these methods by setting
 * the STRICT_ENFORCEMENT constant to true.
 *
 */
public class UnsupportedVetter	extends BaseJDBCTestCase
{
	/////////////////////////////////////////////////////////////
	//
	//	CONSTANTS
	//
	/////////////////////////////////////////////////////////////

	public	static	final	String	SQL_PACKAGE_NAME = "java.sql";

	private	static	final	boolean	STRICT_ENFORCEMENT = false;
	
	/////////////////////////////////////////////////////////////
	//
	//	STATE
	//
	/////////////////////////////////////////////////////////////

	//
	// Table of methods which are allowed to raise
	// SQLFeatureNotSupportedException. Derived from the 1.6 Javadoc.
	//
	private	static	Exclusions[]	rawExcludables = new Exclusions[]
		{
		    new Exclusions
		    (
				java.sql.Connection.class,
				new MD[]
				{
						new MD( "createArrayOf", new Class[] { String.class, Object[].class } ),
						new MD( "createNClob", new Class[] { } ),
						new MD( "createSQLXML", new Class[] { } ),
						new MD( "createStruct", new Class[] { String.class, Object[].class } ),
						new MD( "getNetworkTimeout", new Class[] { }, JDBC.vmSupportsJDBC41() ),
						new MD( "getTypeMap", new Class[] { } ),
						new MD( "prepareStatement", new Class[] { String.class, int[].class } ),
						new MD( "prepareStatement", new Class[] { String.class, String[].class } ),
						new MD( "setNetworkTimeout", new Class[] { java.util.concurrent.Executor.class, int.class }, JDBC.vmSupportsJDBC41() ),
						new MD( "setTypeMap", new Class[] { Map.class } ),
						} ),
		    new Exclusions
		    (
				java.sql.Statement.class,
				new MD[]
				{
						new MD( "cancel", new Class[] { } ),
				    new MD( "execute", new Class[] { String.class, int[].class } ),
						new MD( "execute", new Class[] { String.class, String[].class } ),
						new MD( "executeUpdate", new Class[] { String.class, int[].class } ),
						new MD( "executeUpdate", new Class[] { String.class, String[].class } )
						} )
		    ,

		    new Exclusions 
			(
				java.sql.PreparedStatement.class,
				new MD[]
				{
					new MD( "setArray", new Class[] { int.class, java.sql.Array.class } ),
						new MD( "setNCharacterStream", new Class[] { int.class, java.io.Reader.class } ),
						new MD( "setNCharacterStream", new Class[] { int.class, java.io.Reader.class, long.class } ),
						new MD( "setNClob", new Class[] { int.class, NClob.class } ),
						new MD( "setNClob", new Class[] { int.class, java.io.Reader.class } ),
						new MD( "setNClob", new Class[] { int.class, java.io.Reader.class, long.class } ),
						new MD( "setNString", new Class[] { int.class, String.class } ),
						new MD( "setRef", new Class[] { int.class, Ref.class } ),
                        new MD( "setRowId", new Class[] { int.class, RowId.class } ),
						new MD( "setSQLXML", new Class[] { int.class, SQLXML.class } ),
					    new MD( "setURL", new Class[] { int.class, URL.class } ),
					    new MD( "setNull", new Class[] { int.class, int.class, String.class } ),
					    new MD( "setUnicodeStream", new Class[] { int.class, InputStream.class, int.class } ),
						} ),
			new Exclusions
			(
			    java.sql.CallableStatement.class,
				new MD[]
				{
					//
					// THE FOLLOWING METHODS ARE MANDATORY ACCORDING TO THE
					// JDBC SPEC. HOWEVER, DERBY DOES NOT IMPLEMENT THEM IN ONE
					// OR THE OTHER OF OUR CLIENTS.
					//
					new FD( "getBlob", new Class[] { int.class } ),
					new FD( "getClob", new Class[] { int.class } ),
					

					//
					// According to the JDBC4 spec and javadoc, the following
					// methods are optional and do not have to be implemented.
					//
					
					new MD( "getArray", new Class[] { int.class } ),
					new MD( "getArray", new Class[] { String.class } ),
					new MD( "getBigDecimal", new Class[] { String.class } ),
					new MD( "getBoolean", new Class[] { String.class } ),
					new MD( "getBlob", new Class[] { String.class } ),
					new MD( "getBoolean", new Class[] { String.class } ),
					new MD( "getByte", new Class[] { String.class } ),
					new MD( "getBytes", new Class[] { String.class } ),
					new MD( "getCharacterStream", new Class[] { String.class } ),
					new MD( "getClob", new Class[] { String.class } ),
					new MD( "getDate", new Class[] { String.class } ),
					new MD( "getDate", new Class[] { String.class, Calendar.class } ),
					new MD( "getDouble", new Class[] { String.class } ),
					new MD( "getFloat", new Class[] { String.class } ),
					new MD( "getInt", new Class[] { String.class } ),
					new MD( "getLong", new Class[] { String.class } ),
					new MD( "getNCharacterStream", new Class[] { int.class } ),
					new MD( "getNCharacterStream", new Class[] { String.class } ),
					new MD( "getNClob", new Class[] { int.class } ),
					new MD( "getNClob", new Class[] { String.class } ),
					new MD( "getNString", new Class[] { int.class } ),
					new MD( "getNString", new Class[] { String.class } ),
					new MD( "getObject", new Class[] { String.class } ),
					new MD( "getObject", new Class[] { String.class, Class.class }, JDBC.vmSupportsJDBC41() ),
					new MD( "getRef", new Class[] { int.class } ),
					new MD( "getRef", new Class[] { String.class } ),
					new MD( "getRowId", new Class[] { int.class } ),
					new MD( "getRowId", new Class[] { String.class } ),
					new MD( "getShort", new Class[] { String.class } ),
					new MD( "getSQLXML", new Class[] { int.class } ),
					new MD( "getSQLXML", new Class[] { String.class } ),
					new MD( "getString", new Class[] { String.class } ),
					new MD( "getTime", new Class[] { String.class } ),
					new MD( "getTime", new Class[] { String.class, java.util.Calendar.class } ),
					new MD( "getTimestamp", new Class[] { String.class } ),
					new MD( "getTimestamp", new Class[] { String.class, java.util.Calendar.class } ),
					new MD( "getURL", new Class[] { int.class } ),
					new MD( "getURL", new Class[] { String.class } ),
                    new MD( "registerOutParameter", new Class[] { String.class, int.class } ),
                    new MD( "registerOutParameter", new Class[] { String.class, int.class, int.class } ),
                    new MD( "registerOutParameter", new Class[] { String.class, int.class, String.class } ),
                    new MD( "registerOutParameter", new Class[] { int.class, int.class, String.class } ),
                    makeMD( "registerOutParameter", new String[] { "java.lang.String", "java.sql.SQLType" }, JDBC.vmSupportsJDBC42() ),
                    makeMD( "registerOutParameter", new String[] { "java.lang.String", "java.sql.SQLType", "int" }, JDBC.vmSupportsJDBC42() ),
                    makeMD( "registerOutParameter", new String[] { "java.lang.String", "java.sql.SQLType", "java.lang.String" }, JDBC.vmSupportsJDBC42() ),
						new MD( "setArray", new Class[] { int.class, java.sql.Array.class } ),
						new MD( "setAsciiStream", new Class[] { String.class, java.io.InputStream.class } ),
						new MD( "setAsciiStream", new Class[] { String.class, java.io.InputStream.class, int.class } ),
                                                new MD( "setAsciiStream", new Class[] { String.class, java.io.InputStream.class, long.class } ),
						new MD( "setBigDecimal", new Class[] { String.class, java.math.BigDecimal.class } ),
						new MD( "setBinaryStream", new Class[] { String.class, java.io.InputStream.class } ),
						new MD( "setBinaryStream", new Class[] { String.class, java.io.InputStream.class, int.class } ),
                                                new MD( "setBinaryStream", new Class[] { String.class, java.io.InputStream.class, long.class } ),
						new MD( "setBlob", new Class[] { String.class, java.io.InputStream.class } ),
						new MD( "setBlob", new Class[] { String.class, java.io.InputStream.class, long.class } ),
						new MD( "setBlob", new Class[] { String.class, Blob.class } ),
						new MD( "setBoolean", new Class[] { String.class, boolean.class } ),
						new MD( "setByte", new Class[] { String.class, byte.class } ),
						new MD( "setBytes", new Class[] { String.class, byte[].class } ),
						new MD( "setCharacterStream", new Class[] { String.class, java.io.Reader.class } ),
						new MD( "setCharacterStream", new Class[] { String.class, java.io.Reader.class, int.class } ),
                                                new MD( "setCharacterStream", new Class[] { String.class, java.io.Reader.class, long.class } ),
						new MD( "setClob", new Class[] { String.class, java.io.Reader.class } ),
						new MD( "setClob", new Class[] { String.class, java.io.Reader.class, long.class } ),
						new MD( "setClob", new Class[] { String.class, Clob.class } ),
						new MD( "setDate", new Class[] { String.class, java.sql.Date.class } ),
						new MD( "setDate", new Class[] { String.class, java.sql.Date.class, Calendar.class } ),
						new MD( "setDouble", new Class[] { String.class, double.class} ),
						new MD( "setFloat", new Class[] { String.class, float.class } ),
						new MD( "setInt", new Class[] { String.class, int.class } ),
						new MD( "setLong", new Class[] { String.class, long.class } ),
						new MD( "setNCharacterStream", new Class[] { int.class, java.io.Reader.class, long.class } ),
						new MD( "setNCharacterStream", new Class[] { String.class, java.io.Reader.class } ),
						new MD( "setNCharacterStream", new Class[] { String.class, java.io.Reader.class, long.class } ),
						new MD( "setNClob", new Class[] { int.class, java.io.Reader.class, long.class } ),
						new MD( "setNClob", new Class[] { int.class, NClob.class } ),
						new MD( "setNClob", new Class[] { String.class, java.io.Reader.class } ),
						new MD( "setNClob", new Class[] { String.class, java.io.Reader.class, long.class } ),
						new MD( "setNClob", new Class[] { String.class, NClob.class } ),
						new MD( "setNString", new Class[] { int.class, String.class } ),
						new MD( "setNString", new Class[] { String.class, String.class } ),
						new MD( "setNull", new Class[] { String.class, int.class } ),
						new MD( "setNull", new Class[] { String.class, int.class, String.class } ),
						new MD( "setObject", new Class[] { String.class, Object.class } ),
						new MD( "setObject", new Class[] { String.class, Object.class, int.class } ),
						new MD( "setObject", new Class[] { String.class, Object.class, int.class, int.class } ),
						new MD( "setRef", new Class[] { int.class, Ref.class } ),
						new MD( "setRowId", new Class[] { int.class, RowId.class } ),
						new MD( "setRowId", new Class[] { String.class, RowId.class } ),
						new MD( "setSQLXML", new Class[] { int.class, SQLXML.class } ),
						new MD( "setSQLXML", new Class[] { String.class, SQLXML.class } ),
						new MD( "setShort", new Class[] { String.class, short.class } ),
						new MD( "setString", new Class[] { String.class, String.class } ),
						new MD( "setTime", new Class[] { String.class, Time.class } ),
						new MD( "setTime", new Class[] { String.class, Time.class, Calendar.class } ),
						new MD( "setTimestamp", new Class[] { String.class, Timestamp.class } ),
						new MD( "setTimestamp", new Class[] { String.class, Timestamp.class, Calendar.class } ),
						new MD( "setURL", new Class[] { int.class, URL.class } ),
						new MD( "setURL", new Class[] { String.class, URL.class } )
				}
			),
		    new Exclusions
		    (
				java.sql.ResultSet.class,
				new MD[]
				{
					//
					// THE FOLLOWING METHODS ARE MANDATORY ACCORDING TO THE
					// JDBC SPEC. HOWEVER, DERBY DOES NOT IMPLEMENT THEM IN ONE
					// OR THE OTHER OF OUR CLIENTS.
					//
                                        new FD( "updateNClob",new Class[] { int.class,Reader.class,long.class}),
                                        new FD( "updateNClob",new Class[] { String.class,Reader.class,long.class}),

					//
					// According to the JDBC4 spec and javadoc, the following
					// methods are optional and do not have to be implemented.
					//
					
				    new MD( "getNCharacterStream", new Class[] { int.class } ),
						new MD( "getNCharacterStream", new Class[] { String.class } ),
						new MD( "getNString", new Class[] { int.class } ),
						new MD( "getNString", new Class[] { String.class } ),
						new MD( "getURL", new Class[] { int.class } ),
						new MD( "getURL", new Class[] { String.class } ),
						new MD( "getArray", new Class[] { int.class } ),
						new MD( "getArray", new Class[] { String.class } ),
						new MD( "getNClob", new Class[] { int.class } ),
						new MD( "getNClob", new Class[] { String.class } ),
						new MD( "getRef", new Class[] { int.class } ),
						new MD( "getRef", new Class[] { String.class } ),
						new MD( "getRowId", new Class[] { int.class } ),
						new MD( "getRowId", new Class[] { String.class } ),
						new MD( "getSQLXML", new Class[] { int.class } ),
						new MD( "getSQLXML", new Class[] { String.class } ),
						new MD( "getUnicodeStream", new Class[] { int.class } ),
						new MD( "getUnicodeStream", new Class[] { String.class } ),
						new MD( "refreshRow", new Class[] { } ),
						new MD( "updateArray", new Class[] { int.class, java.sql.Array.class } ),
						new MD( "updateArray", new Class[] { String.class, java.sql.Array.class } ),
						new MD( "updateNCharacterStream", new Class[] { int.class, java.io.Reader.class } ),
						new MD( "updateNCharacterStream", new Class[] { int.class, java.io.Reader.class, long.class } ),
						new MD( "updateNCharacterStream", new Class[] { String.class, java.io.Reader.class } ),
						new MD( "updateNCharacterStream", new Class[] { String.class, java.io.Reader.class, long.class } ),
						new MD( "updateNClob", new Class[] { int.class, NClob.class } ),
						new MD( "updateNClob", new Class[] { int.class, Reader.class } ),
						new MD( "updateNClob", new Class[] { String.class, NClob.class } ),
						new MD( "updateNClob", new Class[] { String.class, Reader.class } ),
						new MD( "updateNString", new Class[] { int.class, String.class } ),
						new MD( "updateNString", new Class[] { String.class, String.class } ),
						new MD( "updateRef", new Class[] { int.class, Ref.class } ),
						new MD( "updateRef", new Class[] { String.class, Ref.class } ),
						new MD( "updateRowId", new Class[] { int.class, RowId.class } ),
						new MD( "updateRowId", new Class[] { String.class, RowId.class } ),
						new MD( "updateSQLXML", new Class[] { int.class, SQLXML.class } ),
						new MD( "updateSQLXML", new Class[] { String.class, SQLXML.class } )
						} ),
			//
			// Lance Andersen, spec lead for JDBC4, says:
			// If you support a datatype, then you have to implement
			// all of its methods.
			//

		};

    //
    // Make an MD if the JVM level supports the indicated classes.
    // Returns null if the JVM doesn't.
    //
    private static  MD  makeMD
        ( String methodName, String[] argClassNames, boolean requiredAtThisLevel )
    {
        // return null if the class names can't be resolved
        int     count = argClassNames.length;
        Class[] argTypes = new Class[ count ];

        try {
            for ( int i = 0; i < count; i++ )
            {
                String  className = argClassNames[ i ];
                if ( "int".equals( className ) ) { argTypes[ i ] = int.class; }
                else { argTypes[ i ] = Class.forName( argClassNames[ i ] ); }
            }
        }
        catch (Exception e) { return null; }

        return new MD( methodName, argTypes, requiredAtThisLevel );
    }
    
	//
	// This is the Hashtable where we keep the exclusions.
	//
	private	static	Hashtable< Class, HashSet<Method> >	excludableMap;
	
	/////////////////////////////////////////////////////////////
	//
	//	CONSTRUCTOR
	//
	/////////////////////////////////////////////////////////////

    /**
     * Creates a new instance.
     */
    public UnsupportedVetter() { super("UnsupportedVetter"); }

	/////////////////////////////////////////////////////////////
	//
	//	ENTRY POINTS
	//
	/////////////////////////////////////////////////////////////

	/**
	 * <p>
	 * Find all methods in this framework which raise SQLFeatureNotSupportedException.
	 * </p>
	 */
	public	void	testSupportedMethods()
		throws Exception
	{
        getTestConfiguration().setVerbosity( true );

        if ( savedVerbosity ) { println( "Supports JDBC 4.2 = " + JDBC. vmSupportsJDBC42() ); }

		HashSet<String>	vanishedMethodList = new HashSet<String>();
		HashSet<String>	unsupportedList = new HashSet<String>();
		HashSet<String>	notUnderstoodList = new HashSet<String>();

		// Build map of interfaces to their methods which may raise SQLFeatureNotSupportedException.
		initializeExcludableMap( vanishedMethodList );

		vetDataSource( unsupportedList, notUnderstoodList );
		vetConnectionPooledDataSource( unsupportedList, notUnderstoodList );
		vetXADataSource( unsupportedList, notUnderstoodList );

		//
		// Print methods which behave unexpectedly.
		//
		printVanishedMethodList( vanishedMethodList );
		printUnsupportedList( unsupportedList );
		printNotUnderstoodList( notUnderstoodList );

        assertEquals( "vanishedMethodList", 0, vanishedMethodList.size() );
        assertEquals( "unsupportedList", 0, unsupportedList.size() );
        assertEquals( "notUnderstoodList", 0, notUnderstoodList.size() );
	}

	//
	// Find all the objects inside the DataSource and vet them.
	//
	private	void	vetDataSource
		( HashSet<String> unsupportedList, HashSet<String> notUnderstoodList )
		throws Exception
	{
		DataSource			ds = JDBCDataSource.getDataSource();
		Connection			conn = ds.getConnection();

		vetObject( ds, unsupportedList, notUnderstoodList );

		connectionWorkhorse( conn, unsupportedList, notUnderstoodList );
	}

	//
	// Find all the objects inside the ConnectionPooledDataSource and vet them.
	//
	private	void	vetConnectionPooledDataSource
		( HashSet<String> unsupportedList, HashSet<String> notUnderstoodList )
		throws Exception
	{
		ConnectionPoolDataSource	ds = J2EEDataSource.getConnectionPoolDataSource();
		PooledConnection			pc = ds.getPooledConnection
			(getTestConfiguration().getUserName(),
                    getTestConfiguration().getUserPassword());
		Connection					conn = pc.getConnection();

		vetObject( ds, unsupportedList, notUnderstoodList );
		vetObject( pc, unsupportedList, notUnderstoodList );

		connectionWorkhorse( conn, unsupportedList, notUnderstoodList );
	}

	//
	// Find all the objects inside the XADataSource and vet them.
	//
	private	void	vetXADataSource
		( HashSet<String> unsupportedList, HashSet<String> notUnderstoodList )
		throws Exception
	{
		XADataSource				ds = J2EEDataSource.getXADataSource();
		XAConnection				xaconn = ds.getXAConnection
			(getTestConfiguration().getUserName(),
                    getTestConfiguration().getUserPassword());
		Connection					conn = xaconn.getConnection();

		vetObject( ds, unsupportedList, notUnderstoodList );
		vetObject( xaconn, unsupportedList, notUnderstoodList );

		connectionWorkhorse( conn, unsupportedList, notUnderstoodList );
	}

	//
	// Find all the methods for java.sql objects in the Connection which raise
	// SQLFeatureNotSupportedException.
	//
	private	void	connectionWorkhorse
		( Connection conn, HashSet<String> unsupportedList, HashSet<String> notUnderstoodList  )
		throws Exception
	{
		vetSavepoint( conn, unsupportedList, notUnderstoodList );
		vetLargeObjects( conn, unsupportedList, notUnderstoodList );
		
		DatabaseMetaData	dbmd = conn.getMetaData();
		PreparedStatement	ps = conn.prepareStatement
			( "select * from sys.systables where tablename = ?" );

		ps.setString( 1, "foo" );

		ParameterMetaData	parameterMetaData = ps.getParameterMetaData();
		ResultSet			rs = ps.executeQuery();
		ResultSetMetaData	rsmd = rs.getMetaData();
        Statement			stmt = conn.createStatement();

        CallableStatement	cs =
            conn.prepareCall("CALL SYSCS_UTIL.SYSCS_SET_RUNTIMESTATISTICS(0)");
        ParameterMetaData	csmd = cs.getParameterMetaData();

		//
		// The vetObject() method calls all of the methods in these objects
		// in a deterministic order, calling the close() method last.
		// Inspect these objects in an order which respects the fact that
		// the objects are closed as a result of calling vetObject().
		//
		vetObject( dbmd, unsupportedList, notUnderstoodList );
		vetObject( stmt, unsupportedList, notUnderstoodList );
		vetObject( csmd, unsupportedList, notUnderstoodList );
		vetObject( cs, unsupportedList, notUnderstoodList );
		vetObject( rsmd, unsupportedList, notUnderstoodList );
		vetObject( rs, unsupportedList, notUnderstoodList );
		vetObject( parameterMetaData, unsupportedList, notUnderstoodList );
		vetObject( ps, unsupportedList, notUnderstoodList );
		vetObject( conn, unsupportedList, notUnderstoodList );

		// No need to close the objects. They were closed by vetObject().
	}
	
	//
	// Examine Savepoints.
	//
	private	void	vetSavepoint
		( Connection conn, HashSet<String> unsupportedList, HashSet<String> notUnderstoodList  )
		throws Exception
	{
        conn.setAutoCommit( false );

        Savepoint			sp = conn.setSavepoint();
		
		vetObject( sp, unsupportedList, notUnderstoodList );
		
        conn.releaseSavepoint(sp);
	}

	//
	// Examine BLOBs and CLOBs.
	//
	private	void	vetLargeObjects
		( Connection conn, HashSet<String> unsupportedList, HashSet<String> notUnderstoodList  )
		throws Exception
	{
        Statement		stmt = conn.createStatement();

        stmt.execute("CREATE TABLE t (id INT PRIMARY KEY, " +
                     "b BLOB(10), c CLOB(10))");
        stmt.execute("INSERT INTO t (id, b, c) VALUES (1, "+
                     "CAST (" + TestUtil.stringToHexLiteral("101010001101") +
                     "AS BLOB(10)), CAST ('hello' AS CLOB(10)))");

        ResultSet rs = stmt.executeQuery("SELECT id, b, c FROM t");

        rs.next();

        Blob		blob = rs.getBlob(2);
        Clob		clob = rs.getClob(3);

		vetObject( blob, unsupportedList, notUnderstoodList );
		vetObject( clob, unsupportedList, notUnderstoodList );

        stmt.close();
        conn.rollback();
	}


	/////////////////////////////////////////////////////////////
	//
	//	MINIONS
	//
	/////////////////////////////////////////////////////////////

	//
	// Initialize the hashtable of methods which are allowed to raise
	// SQLFeatureNotSupportedException.
	//
	private	void	initializeExcludableMap( HashSet<String> vanishedMethodList )
		throws Exception
	{
		excludableMap = new Hashtable< Class, HashSet<Method> >();
		
		int		count = rawExcludables.length;

		for ( int i = 0; i < count; i++ )
		{
			Exclusions		exclusions = rawExcludables[ i ];
			Class<?>		iface = exclusions.getInterface();
			MD[]			mds = exclusions.getExcludedMethods();
			int				exclusionCount = mds.length;
			HashSet<Method>	excludedMethodSet = new HashSet<Method>();

			for ( int j = 0; j < exclusionCount; j++ )
			{
				MD		md = mds[ j ];

                if ( md == null ) { continue; }
                if ( !md.requiredAtThisLevel() ) { continue; }

				//
				// If we are strictly enforcing the JDBC standard,
				// then expose the mandatory methods which we know Derby
				// doesn't implement.
				//
				if ( STRICT_ENFORCEMENT && !md.isOptional()  ) { continue; }

				Method	method = null;

				try {
					method = iface.getMethod( md.getMethodName(), md.getArgTypes() );
				} catch (NoSuchMethodException e) {}

				if ( method == null )
				{
					vanishedMethodList.add
						( "Method has vanished from SQL interface: " + iface.getName() + "." + md );
				}

				excludedMethodSet.add( method );
			}

			excludableMap.put( iface, excludedMethodSet );
		}
	}

	//
	// Find all the methods from java.sql interfaces which are implemented by an object
	// and which raise SQLFeatureNotSupportedException.
	//
	private	void	vetObject
		( Object candidate, HashSet<String> unsupportedList, HashSet<String> notUnderstoodList )
		throws Exception
	{
		Class		myClass = candidate.getClass();

		vetInterfaces( candidate, myClass, unsupportedList, notUnderstoodList );
	}

	//
	// Find all the java.sql interfaces implemented by a class and find
	// the methods in those interfaces which raise
	// SQLFeatureNotSupportedException when called on the passed-in candidate object.
	//
	private	void	vetInterfaces
		( Object candidate, Class myClass,
		  HashSet<String> unsupportedList, HashSet<String> notUnderstoodList )
		throws Exception
	{
		Class		superClass = myClass.getSuperclass();

		if ( superClass != null )
		{ vetInterfaces( candidate, superClass, unsupportedList, notUnderstoodList ); }

		//
		// The contract for Class.getInterfaces() states that the interfaces
		// come back in a deterministic order, namely, in the order that
		// they were declared in the "extends" clause.
		//
		Class<?>[]	interfaces = myClass.getInterfaces();
		int			interfaceCount = interfaces.length;

		for ( int i = 0; i < interfaceCount; i++ )
		{
			Class<?>	iface = interfaces[ i ];

			if ( iface.getPackage().getName().equals( SQL_PACKAGE_NAME ) )
			{
				vetInterfaceMethods( candidate, iface, unsupportedList, notUnderstoodList );
			}

			vetInterfaces( candidate, iface, unsupportedList, notUnderstoodList );
		}
	}

	//
	// Examine all the methods in an interface to determine which ones
	// raise SQLFeatureNotSupportedException.
	//
	private	void	vetInterfaceMethods
		( Object candidate, Class iface,
		  HashSet<String> unsupportedList, HashSet<String> notUnderstoodList )
		throws Exception
	{
		Method[]	methods = sortMethods( iface );
		int			methodCount = methods.length;

		for ( int i = 0; i < methodCount; i++ )
		{
			Method	method = methods[ i ];

			vetMethod( candidate, iface, method, unsupportedList, notUnderstoodList );
		}
	}

	//
	// Return the methods of an interface in a deterministic
	// order. Class.getMethods() does not do us this favor.
	//
	private	Method[]	sortMethods( Class iface )
		throws Exception
	{
		Method[]			raw = iface.getMethods();
		int					count = raw.length;
		Method[]			cooked = new Method[ count ];
		MethodSortable[]	sortables = new MethodSortable[ count ];

		for ( int i = 0; i < count; i++ ) { sortables[ i ] = new MethodSortable( raw[ i ] ); }

		Arrays.sort( sortables );

		for ( int i = 0; i < count; i++ ) { cooked[ i ] = sortables[ i ].getMethod(); }

		return cooked;
	}

	//
	// Examine a single method to see if it raises SQLFeatureNotSupportedException.
	//
	private	void	vetMethod
		( Object candidate, Class iface, Method method,
		  HashSet<String> unsupportedList, HashSet<String> notUnderstoodList )
		throws Exception
	{
		try {
			method.invoke( candidate, getNullArguments( method.getParameterTypes() ) );

			// it's ok for the method to succeed
		}
		catch (Throwable e)
		{
			if ( !( e instanceof InvocationTargetException ) )
			{
				recordUnexpectedError( candidate, iface, method, notUnderstoodList, e );
			}
			else
			{
				Throwable	cause = e.getCause();
				
				if ( cause instanceof SQLFeatureNotSupportedException )
				{
					boolean	isExcludable = isExcludable( method );

					if ( !isExcludable )
					{
					    StackTraceElement[] stack = 
						cause.getStackTrace();
						int i = 0;
						while(i < stack.length && !stack[i].getMethodName().
							  equals("notImplemented")){
								++i;
							}
							while(i < stack.length && stack[i].getMethodName().
								  equals("notImplemented")){
								++i;
							}
							if (i == stack.length) {
								//cause.printStackTrace();
							}
				     
							unsupportedList.add( candidate.getClass().getName() + ": " + method + "@" + (i==stack.length?"no source":cause.getStackTrace()[i]));
					} else {

					}
				}
				else if ( cause instanceof SQLException )
				{
					// swallow other SQLExceptions, caused by bogus args
				}
				else if ( cause instanceof NullPointerException )
				{
					// swallow other NPEs, caused by bogus args
				}
				else if ( cause instanceof ArrayIndexOutOfBoundsException )
				{
					// swallow these, caused by bogus args
				}
				else
				{
					recordUnexpectedError( candidate, iface, method, notUnderstoodList, cause );
				}
				
			}
		}
	}

	//
	// Record an unexpected error.
	//
	private	void	recordUnexpectedError
		( Object candidate, Class iface, Method method,
		  HashSet<String> notUnderstoodList, Throwable cause )
		throws Exception
	{
		notUnderstoodList.add
			( candidate.getClass().getName() + " " + method + " raises " + cause );
	}
	
	//
	// Returns true if this method is allowed to raise SQLFeatureNotSupportedException.
	//
	private	boolean	isExcludable(Method method )
		throws Exception
	{
		Class				iface = method.getDeclaringClass();
		HashSet<Method>		excludableMethods = excludableMap.get( iface );

		if ( excludableMethods == null )
		{
			return false;
		}

		return excludableMethods.contains( method );
	}
	
    /**
     * Takes an array of classes and returns an array of objects with
     * null values compatible with the classes. Helper method for
     * converting a parameter list to an argument list.
     *
     * @param params a <code>Class[]</code> value
     * @return an <code>Object[]</code> value
     */
    private Object[] getNullArguments(Class[] params) {
        Object[] args = new Object[params.length];
        for (int i = 0; i < params.length; i++) {
            args[i] = getNullValueForType(params[i]);
        }
        return args;
    }

    /**
     * Returns a null value compatible with the class. For instance,
     * return <code>Boolean.FALSE</code> for primitive booleans, 0 for
     * primitive integers and <code>null</code> for non-primitive
     * types.
     *
     * @param type a <code>Class</code> value
     * @return a null value
     */
    private Object getNullValueForType(Class type)
	{
        if (!type.isPrimitive()) {
            return null;
        }
        if (type == Boolean.TYPE) {
            return Boolean.FALSE;
        }
        if (type == Character.TYPE) {
            return new Character((char) 0);
        }
        if (type == Byte.TYPE) {
            return new Byte((byte) 0);
        }
        if (type == Short.TYPE) {
            return new Short((short) 0);
        }
        if (type == Integer.TYPE) {
            // use 1 instead of 0. 0 = java.sql.Types.NULL and this causes
            // various type-aware methods to raise SQLFeatureNotSupportedException
            return new Integer(1);
        }
        if (type == Long.TYPE) {
            return new Long(0L);
        }
        if (type == Float.TYPE) {
            return new Float(0f);
        }
        if (type == Double.TYPE) {
            return new Double(0d);
        }
        fail("Don't know how to handle type " + type);
        return null;            // unreachable statement
    }

	// debug print the list of methods which throw SQLFeatureNotSupportedException
	private	void	printUnsupportedList( HashSet<String> unsupportedList )
	{
		int			count = unsupportedList.size();

		if ( count == 0 ) { return; }

		println( "--------------- UNSUPPORTED METHODS ------------------" );
		println( "--" );

		String[]	result = new String[ count ];

		unsupportedList.toArray( result );
		Arrays.sort( result );

		for ( int i = 0; i < count; i++ )
		{
			println( result[ i ] );
		}
	}

	// debug print the list of methods which have disappeared from the SQL interface
	private	void	printVanishedMethodList( HashSet<String> vanishedMethodList )
	{
		int			count = vanishedMethodList.size();

		if ( count == 0 ) { return; }

		println( "--------------- VANISHED METHODS ------------------" );
		println( "--" );

		String[]	result = new String[ count ];

		vanishedMethodList.toArray( result );
		Arrays.sort( result );

		for ( int i = 0; i < count; i++ )
		{
			println( result[ i ] );
		}
	}

	// Debug print the list of method failures which we don't understand
	private	void	printNotUnderstoodList( HashSet<String> notUnderstoodList )
	{
		int			count = notUnderstoodList.size();

		if ( count == 0 ) { return; }

		println( "\n\n" );
		println( "--------------- NOT UNDERSTOOD METHODS ------------------" );
		println( "--" );

		String[]	result = new String[ count ];

		notUnderstoodList.toArray( result );
		Arrays.sort( result );

		for ( int i = 0; i < count; i++ )
		{
			println( result[ i ] );
		}
	}

	/////////////////////////////////////////////////////////////
	//
	//	INNER CLASSES
	//
	/////////////////////////////////////////////////////////////

	/**
	 * <p>
	 * Method descriptor for optional methods which Derby does not have
	 * to implement. We abbreviate the name of this class to make
	 * arrays of these declarations compact and readable.
	 * </p>
	 */
	public	static	class	MD
	{
		private	String	_methodName;
		private	Class[]	_argTypes;
        private  boolean _requiredAtThisLevel;

		/** Construct from methodName and argument types. */
		public	MD( String methodName, Class[] argTypes )
		{
            this( methodName, argTypes, true );
		}
		public	MD( String methodName, Class[] argTypes, boolean requiredAtThisLevel )
		{
			_methodName = methodName;
			_argTypes = argTypes;
            _requiredAtThisLevel = requiredAtThisLevel;
		}

		/** Get the name of this method. */
		public	String	getMethodName() { return _methodName; }

		/** Get the types of the method's arguments */
		public	Class[]	getArgTypes() { return _argTypes; }

		/** Return whether this method is optional */
		public	boolean	isOptional() { return true; }

		/** Return whether this method is required at the current JDBC level */
		public	boolean	requiredAtThisLevel() { return _requiredAtThisLevel; }

		public	String	toString()
		{
			StringBuffer	buffer = new StringBuffer();

			buffer.append( _methodName );
			buffer.append( "( " );

			if ( _argTypes != null )
			{
				int		count = _argTypes.length;

				for ( int i = 0; i < count; i++ )
				{
					if ( i > 0 ) { buffer.append( ", " ); }

					buffer.append( _argTypes[ i ].getName() );
				}
			}

			buffer.append( " )" );

			return buffer.toString();
		}

	}

	/**
	 * <p>
	 * Method descriptor for mandatory methods which we know Derby does not
	 * implement. We abbreviate the name of this class to make
	 * arrays of these declarations compact and readable.
	 * </p>
	 */
	public	static	final	class	FD	extends	MD
	{
		private	String	_methodName;
		private	Class[]	_argTypes;

		/** Construct from methodName and argument types. */
		public	FD( String methodName, Class[] argTypes ) { super( methodName, argTypes ); }

		/** Return whether this method is optional */
		public	boolean	isOptional() { return false; }
	}

	/**
	 * <p>
	 * Describes all of the methods for an interface which are allowed
	 * to raise SQLFeatureNotSupportedException.
	 * </p>
	 */
	public	static	final	class	Exclusions
	{
		private	Class	_class;
		private	MD[]	_excludedMethods;

		/** Construct from the interface and descriptors for the methods which
		 are allowed to raise SQLFeatureNotSupportedException */
		public	Exclusions( Class theInterface, MD[] excludedMethods )
		{
			_class = theInterface;
			_excludedMethods = excludedMethods;
		}
		
		/** Get the interface. */
		public	Class	getInterface() { return _class; }

		/** Get descriptors for the methods which may raise
			SQLFeatureNotSupportedException. */
		public	MD[]	getExcludedMethods() { return _excludedMethods; }
	}

	/**
	 * <p>
	 * Used for sorting methods, which don't come back from Class.getMethods()
	 * in a deterministic order. For extra credit, we put the close() method at
	 * the end of the sort order so that, when we invoke the sorted methods, we
	 * don't accidentally invalidate the receiver.
	 * </p>
	 */
	public	static	final	class	MethodSortable	implements	Comparable
	{
		private	Method	_method;

		/** Conjure out of a Method */
		public	MethodSortable( Method method ) { _method = method; }

		/** Get the wrapped Method */
		public	Method	getMethod() { return _method; }

		//////////////////////////////////////////////////
		//
		//	Comparable BEHAVIOR
		//
		//////////////////////////////////////////////////

		public	int	compareTo( Object other )
		{
			MethodSortable	that = (MethodSortable) other;
			boolean			thisIsClose = this.isCloseMethod();
			boolean			thatIsClose = that.isCloseMethod();

			// throw the close() method to the end of the sort order
			if ( thisIsClose )
			{
				if ( thatIsClose ) { return 0; }
				else { return 1; }
			}
			else if ( thatIsClose ) { return -1; }

			return this.toString().compareTo( that.toString() );
		}

		//////////////////////////////////////////////////
		//
		//	Object OVERRIDES
		//
		//////////////////////////////////////////////////

		public	String	toString() { return _method.toString(); }
		
		//////////////////////////////////////////////////
		//
		//	MINIONS
		//
		//////////////////////////////////////////////////

		// Returns true if the wrapped method is close().
		private	boolean	isCloseMethod()
		{
			return ( toString().startsWith( "close()" ) );
		}
		
	}

    private boolean savedVerbosity;

    protected void setUp() {
        // testSupportedMethods() sets the verbosity, so we need to save the
        // original verbosity here and restore it in tearDown.
        savedVerbosity = getTestConfiguration().isVerbose();
    }

    protected void tearDown() throws Exception {
        getTestConfiguration().setVerbosity(savedVerbosity);
        super.tearDown();
    }

    public static Test suite() {
        return TestConfiguration.defaultSuite(UnsupportedVetter.class);
    }
}

