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Common Lisp implementation running on the JVM
/*
* probe_file.java
*
* Copyright (C) 2003-2005 Peter Graves
* $Id$
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* As a special exception, the copyright holders of this library give you
* permission to link this library with independent modules to produce an
* executable, regardless of the license terms of these independent
* modules, and to copy and distribute the resulting executable under
* terms of your choice, provided that you also meet, for each linked
* independent module, the terms and conditions of the license of that
* module. An independent module is a module which is not derived from
* or based on this library. If you modify this library, you may extend
* this exception to your version of the library, but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
package org.armedbear.lisp;
import static org.armedbear.lisp.Lisp.*;
import java.io.File;
public final class probe_file
{
public static final Primitive PROBE_FILE
= new pf_probe_file();
@DocString(name="probe-file",
args="pathspec",
returns="truename")
private static final class pf_probe_file extends Primitive {
pf_probe_file() {
super(Symbol.PROBE_FILE, "pathspec");
}
@Override
public LispObject execute(LispObject arg)
{
if (arg == null || arg.equals(NIL)) {
return NIL;
}
Pathname p = coerceToPathname(arg);
if (p.isWild()) {
return error(new FileError("Cannot find the TRUENAME for a wild pathname.",
p));
}
// TODO: refactor Pathname{,Jar,URL}.truename() to be non-static?
if (p instanceof JarPathname) {
return JarPathname.truename(p, false);
} else if (p instanceof URLPathname) {
return URLPathname.truename((URLPathname)p, false);
} else {
return Pathname.truename(p, false);
}
}
};
public static final Primitive TRUENAME
= new pf_truename();
@DocString(name="truename",
args="pathspec",
returns="pathname")
private static class pf_truename extends Primitive {
pf_truename() {
super(Symbol.TRUENAME, "filespec");
}
@Override
public LispObject execute(LispObject arg)
{
Pathname p = coerceToPathname(arg);
if (p.isWild()) {
return error(new FileError("Cannot find the TRUENAME for a wild pathname.",
p));
}
// TODO: refactor Pathname{,Jar,URL}.truename() to be non-static?
if (p instanceof JarPathname) {
return JarPathname.truename(p, true);
} else if (p instanceof URLPathname) {
return URLPathname.truename((URLPathname)p, true);
} else {
return Pathname.truename(p, true);
}
}
};
public static final Primitive PROBE_DIRECTORY
= new pf_probe_directory();
@DocString(name="probe-directory",
args="pathspec",
returns="truename")
private static final class pf_probe_directory extends Primitive {
pf_probe_directory() {
super("probe-directory", PACKAGE_EXT, true);
}
@Override
public LispObject execute(LispObject arg)
{
Pathname pathname = coerceToPathname(arg);
if (pathname.isWild()) {
error(new FileError("Cannot probe a wild pathname as a directory.", pathname));
}
Pathname defaultedPathname = (Pathname)Pathname.MERGE_PATHNAMES.execute(pathname);
if (defaultedPathname instanceof JarPathname) {
if (defaultedPathname.getName().equals(NIL)
&& defaultedPathname.getType().equals(NIL)) {
return Symbol.PROBE_FILE.execute(defaultedPathname);
}
SimpleString lastDirectory = (SimpleString)Symbol.FILE_NAMESTRING.execute(defaultedPathname);
LispObject appendedDirectory
= defaultedPathname.getDirectory().reverse().push(lastDirectory).reverse();
defaultedPathname.setDirectory(appendedDirectory);
return Symbol.PROBE_FILE.execute(defaultedPathname);
}
File file = defaultedPathname.getFile();
if (file == null || !file.isDirectory()) {
return NIL;
}
if (defaultedPathname.getName().equals(NIL)
&& defaultedPathname.getType().equals(NIL)) {
return Symbol.PROBE_FILE.execute(defaultedPathname);
}
SimpleString lastDirectory = (SimpleString)Symbol.FILE_NAMESTRING.execute(defaultedPathname);
LispObject appendedDirectory
= defaultedPathname.getDirectory().reverse().push(lastDirectory).reverse();
defaultedPathname.setDirectory(appendedDirectory);
return Symbol.PROBE_FILE.execute(defaultedPathname);
}
};
public static final Primitive FILE_DIRECTORY_P
= new pf_file_directory_p();
@DocString(name="file-directory-p",
args="pathspec &key (wild-error-p t)",
returns="generalized-boolean")
private static final class pf_file_directory_p extends Primitive {
pf_file_directory_p() {
super("file-directory-p", PACKAGE_EXT, true);
}
private LispObject isDirectory(Pathname p) {
LispObject result = PROBE_DIRECTORY.execute(p);
return result.equals(NIL) ? NIL : T;
}
@Override
public LispObject execute(LispObject arg) // XXX Should this merge with defaults?
{
Pathname pathname = coerceToPathname(arg);
if (pathname.isWild()) {
error(new FileError("Fundamentally unable to determine whether a wild pathname is a directory.",
pathname));
}
return isDirectory(pathname);
}
@Override
public LispObject execute(LispObject arg, LispObject wildErrorPKeyword, LispObject wildErrorP)
{
if (!(wildErrorPKeyword.equals(Keyword.WILD_ERROR_P))) {
type_error(wildErrorPKeyword, Keyword.WILD_ERROR_P);
}
Pathname pathname = coerceToPathname(arg);
if (wildErrorP != NIL) {
if (pathname.isWild()) {
error(new FileError("Fundamentally to determine whether a wild pathname is a directory.",
pathname));
}
}
return isDirectory(pathname);
}
};
}