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//# NewFile.cc: Constrain a string to be a new (non-existent) file
//# Copyright (C) 1996,1997,1999,2000,2001,2002,2004
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: casa-feedback@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
#include <casacore/tables/LogTables/NewFile.h>
#include <casacore/tables/Tables/TableUtil.h>
#include <casacore/casa/System/Choice.h>
#include <casacore/casa/OS/File.h>
#include <casacore/casa/OS/RegularFile.h>
#include <casacore/casa/OS/Directory.h>
#include <casacore/casa/OS/SymLink.h>
#include <casacore/casa/Arrays/Vector.h>
#include <casacore/tables/Tables/Table.h>
#include <casacore/casa/Logging/LogMessage.h>
#include <casacore/casa/Logging/LogSink.h>
#include <casacore/casa/Exceptions/Error.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
NewFile::NewFile(Bool deleteIfExists) : delete_p(deleteIfExists)
{
// Nothing
}
NewFile::NewFile(const NewFile &other) : delete_p(other.delete_p)
{
// Nothing
}
NewFile &NewFile::operator=(const NewFile &other)
{
if (this != &other) {
delete_p = other.delete_p;
}
return *this;
}
NewFile::~NewFile()
{
// Nothing
}
Bool NewFile::valueOK(const String &value, String &error) const
{
LogOrigin OR("NewFile",
"valueOK(const String &value, String &error) const",
WHERE);
LogMessage msg(OR);
error = "";
Bool retval = False;
//
if (value.empty()) {
error = "File string is empty";
return False;
}
//
File thefile(value);
if (thefile.exists()) {
String text = String("File '") + value + "' already exists. Remove it?";
Vector<String> choices(2);
choices(0) = "no";
choices(1) = "yes";
String remove = Choice::choice(text, choices);
if (remove == "yes") {
Bool removed = False;
String extra_error = "";
try {
if (thefile.isRegular()) {
RegularFile rfile = thefile;
rfile.remove();
removed = True;
} else if (thefile.isDirectory()) {
// Assume that directories are tables.
if (! Table::isWritable(value)) {
removed = False;
extra_error = "Table is not writable!";
} else {
removed = False;
if (TableUtil::canDeleteTable(extra_error, value)) {
try {
TableUtil::deleteTable(value);
removed = True;
} catch (std::exception& xxx) {
removed = False;
extra_error = String("Error deleting table ")
+ value + ":" + xxx.what();
}
}
}
} else if (thefile.isSymLink()) {
SymLink sfile = thefile;
sfile.remove();
removed = True;
}
} catch (std::exception& x) {
extra_error = x.what();
removed = False;
}
if (!removed) {
retval = False;
error = String("Could not remove file ") + value;
if (extra_error != "") {
error += String("(") + extra_error + ")";
}
error += ".";
} else {
retval = True;
msg.message(String("Removed file ") + value +
" at users request").line(__LINE__).
priority(LogMessage::NORMAL);
LogSink::postGlobally(msg);
}
} else {
retval = False;
error = String("File ") + value +
" exists, and the user does not want to remove it.";
}
} else {
retval = True;
}
return retval;
}
} //# NAMESPACE CASACORE - END
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