/* * opens a DBF file. This is based on Pratap Pereira's * Xbase.pm perl module * @return column definition list (java.util.Hashtable<Object,Object>) * * @author Thomas Morgner <*****@*****.**> added check for * file exists, before the file is opened. Opening a non existing * file will create a new file, and we get errors while trying * to read the non-existend headers */ java.util.Hashtable <Object, Object> open_dbf() //throws TinySQLException { try { java.io.File f = new java.io.File(fullPath); if (TinySQLGlobals.DEBUG) { java.lang.SystemJ.outJ.println("Try to open " + f.getAbsolutePath()); } if (!f.exists()) { throw new TinySQLException("Unable to open " + f.getAbsolutePath() + " - does not exist. or can't be read."); } else if (!f.canRead()) { throw new TinySQLException("Unable to open " + f.getAbsolutePath() + " - file can't be read (permissions?)."); } if (f.canWrite()) { ftbl = new java.io.RandomAccessFile(f, "rw"); } else { /* * Open readonly if the file is not writeable. Needed for * databases on CD-Rom */ ftbl = new java.io.RandomAccessFile(f, "r"); } /* * Read the first 32 bytes ... */ dbfHeader = new DBFHeader(ftbl); /* * read the column info (each is a 32 byte bulk) ... */ java.util.Hashtable <Object, Object> coldef_list = new java.util.Hashtable <Object, Object>(); columnNameKeys = new java.util.Vector <Object>(); int locn = 0; // offset of the current column for (int i = 1; i <= dbfHeader.numFields; i++) { TsColumn coldef = DBFFile.readColdef(ftbl, table, i, locn); locn += coldef.size; // increment locn by the length of this field. coldef_list.put(coldef.name, coldef); columnNameKeys.addElement(coldef.name); } fileOpen = true; return(coldef_list); } catch (Exception e) { if (TinySQLGlobals.DEBUG) { java.lang.SystemJ.err.println(e.ToString()); // e.printStackTrace(); } throw new TinySQLException(e.getMessage()); } }