/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   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 .
 */
package com.sun.star.wizards.db;

import java.util.ArrayList;

import com.sun.star.sdbc.SQLException;
import com.sun.star.sdbc.XResultSet;
import com.sun.star.sdbc.XRow;
import com.sun.star.uno.UnoRuntime;
import com.sun.star.wizards.common.JavaTools;
import com.sun.star.wizards.common.PropertyNames;

/**
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class RelationController extends CommandName
{

    private static final int PKTABLE_CAT = 1;
    private static final int PKTABLE_SCHEM = 2;
    private static final int PKTABLE_NAME = 3;
    private static final int PKCOLUMN_NAME = 4;
    private static final int FKTABLE_CAT = 5;
    private static final int FKTABLE_SCHEM = 6;
    private static final int FKTABLE_NAME = 7;
    private static final int FKCOLUMN_NAME = 8;

    public RelationController(CommandMetaData _CommandMetaData, String _DisplayName)
    {
        super(_CommandMetaData, _DisplayName);
    }

    public String[] getExportedKeys()
    {
        String[] sReferencedTableNames = new String[]
        {
        };
        try
        {
            ArrayList<String> aReferencedTableVector = new ArrayList<String>();
            XResultSet xResultSet = super.getCommandMetaData().xDBMetaData.getExportedKeys(getCatalogName(this), getSchemaName(), getTableName());
            XRow xRow = UnoRuntime.queryInterface(XRow.class, xResultSet);
            while (xResultSet.next())
            {
                String sForeignCatalog = xRow.getString(FKTABLE_CAT);
                String sForeignScheme = xRow.getString(FKTABLE_SCHEM);
                String sForeignTableName = xRow.getString(FKTABLE_NAME);
                CommandName oCommandName = new CommandName(getCommandMetaData(), sForeignCatalog, sForeignScheme, sForeignTableName, false);
                aReferencedTableVector.add(oCommandName.getComposedName());
            }
            sReferencedTableNames = new String[aReferencedTableVector.size()];
            aReferencedTableVector.toArray(sReferencedTableNames);
        }
        catch (SQLException e)
        {
            e.printStackTrace(System.err);
        }
        return sReferencedTableNames;
    }

    private Object getCatalogName(CommandName _oCommandName)
    {
        String sLocCatalog = _oCommandName.getCatalogName();
        if (sLocCatalog.equals(PropertyNames.EMPTY_STRING))
        {
            return null;
        }
        else
        {
            return sLocCatalog;
        }
    }

    public String[][] getImportedKeyColumns(String _sreferencedtablename)
    {
        String[][] sKeyColumnNames = new String[][]
        {
        };
        try
        {
            CommandName oLocCommandName = new CommandName(super.getCommandMetaData(), _sreferencedtablename);
            XResultSet xResultSet = super.getCommandMetaData().xDBMetaData.getImportedKeys(getCatalogName(oLocCommandName), oLocCommandName.getSchemaName(), oLocCommandName.getTableName());
            XRow xRow = UnoRuntime.queryInterface(XRow.class, xResultSet);
            boolean bleaveLoop = false;
            ArrayList<String> aMasterFieldNamesVector = new ArrayList<String>();
            ArrayList<String> aSlaveFieldNamesVector = new ArrayList<String>();
            while (xResultSet.next() && !bleaveLoop)
            {
                String sPrimaryCatalog = null;
                String sPrimarySchema = null;
                if (super.getCommandMetaData().xDBMetaData.supportsCatalogsInDataManipulation())
                {
                    sPrimaryCatalog = xRow.getString(PKTABLE_CAT);
                }
                if (super.getCommandMetaData().xDBMetaData.supportsSchemasInDataManipulation())
                {
                    sPrimarySchema = xRow.getString(PKTABLE_SCHEM);
                }
                String sPrimaryTableName = xRow.getString(PKTABLE_NAME);
                String sPrimaryColumnName = xRow.getString(PKCOLUMN_NAME);
                String sForeignColumnName = xRow.getString(FKCOLUMN_NAME);
                if (JavaTools.isSame(getTableName(), sPrimaryTableName))
                {
                    if (sPrimarySchema == null || JavaTools.isSame(getSchemaName(), sPrimarySchema))
                    {
                        if (JavaTools.isSame(getCatalogName(), sPrimaryCatalog))
                        {
                            aSlaveFieldNamesVector.add(sForeignColumnName);
                            aMasterFieldNamesVector.add(sPrimaryColumnName);
                            bleaveLoop = true;                  //Only one relation may exist between two tables...
                        }
                    }

                }
            }
            sKeyColumnNames = new String[2][aMasterFieldNamesVector.size()];
            sKeyColumnNames[0] = new String[aSlaveFieldNamesVector.size()];
            sKeyColumnNames[1] = new String[aMasterFieldNamesVector.size()];
            aSlaveFieldNamesVector.toArray(sKeyColumnNames[0]);
            aMasterFieldNamesVector.toArray(sKeyColumnNames[1]);
        }
        catch (Exception e)
        {
            e.printStackTrace(System.err);
        }
        return sKeyColumnNames;
    }
}
