static java.util.Properties loadFilePrefsImpl(java.io.File file)
{
Properties result = new Properties();
if (!file.exists())
{
file.getParentFile().mkdirs();
return(result);
}
if (file.canRead())
{
java.io.InputStream inJ = null;
java.nio.channels.FileLock lockJ = null;
try {
java.io.FileInputStream istream = new java.io.FileInputStream(file);
inJ = new java.io.BufferedInputStream(istream);
java.nio.channels.FileChannel channel = istream.getChannel();
lockJ = channel.lockJ(0L, java.lang.Long.MAX_VALUE, true);
org.w3c.dom.Document doc = builder.parse(inJ);
org.w3c.dom.NodeList entries = org.apache.xpath.XPathAPI.selectNodeList(doc
.getDocumentElement(), "entry"); //$NON-NLS-1$
int length = entries.getLength();
for (int i = 0; i < length; i++)
{
org.w3c.dom.Element node = (org.w3c.dom.Element)entries.item(i);
String key = node.getAttribute("key"); //$NON-NLS-1$
String value = node.getAttribute("value"); //$NON-NLS-1$
result.setProperty(key, value);
}
return(result);
} catch (java.io.IOException e) {
} catch (org.xml.sax.SAXException e) {
} catch (javax.xml.transform.TransformerException e) {
// transform shouldn't fail for xpath call
throw new java.lang.AssertionError(e);
} finally {
releaseQuietly(lockJ);
closeQuietly(inJ);
}
}
else
{
file.delete();
}
return(result);
}
/*
* 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());
}
}
