sqltoappdata.java

一个数据访问层Torque3.1的生成器的源代码

    /**
     * Parses UNIQUE (NAME,FOO,BAR) statement
     *
     * @throws ParseException error parsing the input file
     */
    private void create_Table_Column_Unique(Table tbl) throws ParseException
    {
        next();
        if (!token.getStr().toUpperCase().equals("("))
        {
            err("( expected");
        }
        next();
        while (!token.getStr().equals(")"))
        {
            if (!token.getStr().equals(","))
            {
                String colName = token.getStr();
                Column c = tbl.getColumn(colName);
                if (c == null)
                {
                    err("Invalid column name: " + colName);
                }
                c.setUnique(true);
            }
            next();
        }
        if (!token.getStr().toUpperCase().equals(")"))
        {
            err(") expected got: " + token.getStr());
        }

        next(); // skip the )
    }

    /**
     * Parses FOREIGN KEY (BAR) REFERENCES TABLE (BAR) statement
     *
     * @throws ParseException error parsing the input file
     */
    private void create_Table_Column_Foreign(Table tbl) throws ParseException
    {
        next();
        if (!token.getStr().toUpperCase().equals("KEY"))
        {
            err("KEY expected");
        }
        next();
        if (!token.getStr().toUpperCase().equals("("))
        {
            err("( expected");
        }
        next();

        ForeignKey fk = new ForeignKey();
        List localColumns = new ArrayList();
        tbl.addForeignKey(fk);

        String colName = token.getStr();
        localColumns.add(colName);
        next();
        while (token.getStr().equals(","))
        {
            next();
            colName = token.getStr();
            localColumns.add(colName);
            next();
        }
        if (!token.getStr().toUpperCase().equals(")"))
        {
            err(") expected");
        }

        next();

        if (!token.getStr().toUpperCase().equals("REFERENCES"))
        {
            err("REFERENCES expected");
        }

        next();

        fk.setForeignTableName(token.getStr());

        next();

        if (token.getStr().toUpperCase().equals("("))
        {
            next();
            int i = 0;
            fk.addReference((String) localColumns.get(i++), token.getStr());
            next();
            while (token.getStr().equals(","))
            {
                next();
                fk.addReference((String) localColumns.get(i++), token.getStr());
                next();
            }
            if (!token.getStr().toUpperCase().equals(")"))
            {
                err(") expected");
            }
            next();
        }
    }

    /**
     * Parse the data definition of the column statement.
     *
     * @throws ParseException error parsing the input file
     */
    private void create_Table_Column_Data(Table tbl) throws ParseException
    {
        String columnSize = null;
        String columnPrecision = null;
        String columnDefault = null;
        boolean inEnum = false;

        String columnName = token.getStr();
        next();
        String columnType = token.getStr();

        if (columnName.equals(")") && columnType.equals(";"))
        {
            return;
        }

        next();

        // special case for MySQL ENUM's which are stupid anyway
        // and not properly handled by Torque.
        if (columnType.toUpperCase().equals("ENUM"))
        {
            inEnum = true;
            next(); // skip (
            while (!token.getStr().equals(")"))
            {
                // skip until )
                next();
            }
            while (!token.getStr().equals(","))
            {
                if (token.getStr().toUpperCase().equals("DEFAULT"))
                {
                    next();
                    if (token.getStr().equals("'"))
                    {
                        next();
                    }
                    columnDefault = token.getStr();
                    next();
                    if (token.getStr().equals("'"))
                    {
                        next();
                    }
                }
                // skip until ,
                next();
            }
            next(); // skip ,
            columnType = "VARCHAR";
        }
        else if (token.getStr().toUpperCase().equals("("))
        {
            next();
            columnSize = token.getStr();
            next();
            if (token.getStr().equals(","))
            {
                next();
                columnPrecision = token.getStr();
                next();
            }

            if (!token.getStr().equals(")"))
            {
                err(") expected");
            }
            next();
        }

        Column col = new Column(columnName);
        if (columnPrecision != null)
        {
            columnSize = columnSize + columnPrecision;
        }
        col.setTypeFromString(columnType, columnSize);
        tbl.addColumn(col);

        if (inEnum)
        {
            col.setNotNull(true);
            if (columnDefault != null)
            {
                col.setDefaultValue(columnDefault);
            }
        }
        else
        {
            while (!token.getStr().equals(",") && !token.getStr().equals(")"))
            {
                if (token.getStr().toUpperCase().equals("NOT"))
                {
                    next();
                    if (!token.getStr().toUpperCase().equals("NULL"))
                    {
                        err("NULL expected after NOT");
                    }
                    col.setNotNull(true);
                    next();
                }
                else if (token.getStr().toUpperCase().equals("PRIMARY"))
                {
                    next();
                    if (!token.getStr().toUpperCase().equals("KEY"))
                    {
                        err("KEY expected after PRIMARY");
                    }
                    col.setPrimaryKey(true);
                    next();
                }
                else if (token.getStr().toUpperCase().equals("UNIQUE"))
                {
                    col.setUnique(true);
                    next();
                }
                else if (token.getStr().toUpperCase().equals("NULL"))
                {
                    col.setNotNull(false);
                    next();
                }
                else if (token.getStr().toUpperCase().equals("AUTO_INCREMENT"))
                {
                    col.setAutoIncrement(true);
                    next();
                }
                else if (token.getStr().toUpperCase().equals("DEFAULT"))
                {
                    next();
                    if (token.getStr().equals("'"))
                    {
                        next();
                    }
                    col.setDefaultValue(token.getStr());
                    next();
                    if (token.getStr().equals("'"))
                    {
                        next();
                    }
                }
            }
            next(); // eat the ,
        }
    }

    /**
     * Execute the parser.
     *
     * @throws IOException If an I/O error occurs
     * @throws ParseException error parsing the input file
     */
    public AppData execute() throws IOException, ParseException
    {
        count = 0;
        appData = new AppData(databaseType, basePropsFilePath);
        appDataDB = new Database();
        appData.addDatabase(appDataDB);

        FileReader fr = new FileReader(sqlFile);
        BufferedReader br = new BufferedReader(fr);
        SQLScanner scanner = new SQLScanner(br);

        tokens = scanner.scan();

        br.close();

        while (hasTokens())
        {
            if (token == null)
            {
                next();
            }

            if (token.getStr().toUpperCase().equals("CREATE"))
            {
                create();
            }
            if (hasTokens())
            {
                next();
            }
        }
        return appData;
    }

    /**
     * Just 4 testing.
     *
     * @param args commandline args
     * @throws Exception an exception
     */
    public static void main(String args[]) throws Exception
    {
        SQLToAppData s2a = new SQLToAppData(args[0]);
        AppData ad = s2a.execute();
        System.out.println(ad);
    }
}