|
|
|
|
|
|
|
Re: Reading Hard disk file details through plsql [message #671934 is a reply to message #671931] |
Tue, 25 September 2018 03:51 ![Go to previous message Go to previous message](/forum/theme/orafaq/images/up.png) ![Go to next message Go to next message](/forum/theme/orafaq/images/down.png) |
![](http://www.orafaq.com/forum/images/custom_avatars/102589.gif) |
Michel Cadot
Messages: 68675 Registered: March 2007 Location: Nanterre, France, http://...
|
Senior Member Account Moderator |
|
|
Here's a complete package to get file attributes:
CREATE or REPLACE AND COMPILE JAVA SOURCE NAMED "GetFile" AS
import java.lang.*;
import java.util.*;
import java.io.*;
import java.sql.Timestamp;
public class GetFile {
private static int KO = 0;
private static int OK = 1;
public static int exists (String p_file) {
File l_file = new File (p_file);
if (l_file.exists()) return OK; else return KO;
}
public static String name (String p_file) {
File l_file = new File (p_file);
return l_file.getName();
}
public static String path (String p_file) {
File l_file = new File (p_file);
return l_file.getParent();
}
public static String absolutePath (String p_file) {
File l_file = new File (p_file);
String res = l_file.getAbsolutePath();
res = res.substring(0,res.length()-l_file.getName().length()-1);
return res;
}
public static int isFile (String p_file) {
File l_file = new File (p_file);
if (l_file.isFile()) return OK; else return KO;
}
public static int isDirectory (String p_file) {
File l_file = new File (p_file);
if (l_file.isDirectory()) return OK; else return KO;
}
public static int isHidden (String p_file) {
File l_file = new File (p_file);
if (l_file.isHidden()) return OK; else return KO;
}
public static int canRead (String p_file) {
File l_file = new File (p_file);
if (l_file.canRead()) return OK; else return KO;
}
public static int canWrite (String p_file) {
File l_file = new File (p_file);
if (l_file.canWrite()) return OK; else return KO;
}
public static Timestamp lastModified (String p_file) {
File l_file = new File (p_file);
return new Timestamp(l_file.lastModified());
}
public static long length (String p_file) {
File l_file = new File (p_file);
return l_file.length();
}
}
/
SHOW ERRORS
CREATE OR REPLACE PACKAGE get_file AS
FUNCTION exists (p_file IN VARCHAR2) RETURN NUMBER
AS LANGUAGE JAVA
NAME 'GetFile.exists (java.lang.String) return java.lang.int';
FUNCTION name (p_file IN VARCHAR2) RETURN VARCHAR2
AS LANGUAGE JAVA
NAME 'GetFile.name (java.lang.String) return java.lang.String';
FUNCTION path (p_file IN VARCHAR2) RETURN VARCHAR2
AS LANGUAGE JAVA
NAME 'GetFile.path (java.lang.String) return java.lang.String';
FUNCTION absolute_path (p_file IN VARCHAR2) RETURN VARCHAR2
AS LANGUAGE JAVA
NAME 'GetFile.absolutePath (java.lang.String) return java.lang.String';
FUNCTION is_file (p_file IN VARCHAR2) RETURN NUMBER
AS LANGUAGE JAVA
NAME 'GetFile.isFile (java.lang.String) return java.lang.int';
FUNCTION is_directory (p_file IN VARCHAR2) RETURN NUMBER
AS LANGUAGE JAVA
NAME 'GetFile.isDirectory (java.lang.String) return java.lang.int';
FUNCTION is_hidden (p_file IN VARCHAR2) RETURN NUMBER
AS LANGUAGE JAVA
NAME 'GetFile.isHidden (java.lang.String) return java.lang.int';
FUNCTION can_read (p_file IN VARCHAR2) RETURN NUMBER
AS LANGUAGE JAVA
NAME 'GetFile.canRead (java.lang.String) return java.lang.int';
FUNCTION can_write (p_file IN VARCHAR2) RETURN NUMBER
AS LANGUAGE JAVA
NAME 'GetFile.canWrite (java.lang.String) return java.lang.int';
FUNCTION last_modified (p_file IN VARCHAR2) RETURN DATE
AS LANGUAGE JAVA
NAME 'GetFile.lastModified (java.lang.String) return java.sql.Timestamp';
FUNCTION length (p_file IN VARCHAR2) RETURN NUMBER
AS LANGUAGE JAVA
NAME 'GetFile.length (java.lang.String) return java.lang.long';
END;
/
SHOW ERRORS
And an example of execution:
TEST> DECLARE
2 l_file VARCHAR2(50);
3 BEGIN
4 l_file := '.\NETWORK\ADMIN\tnsnames.ora';
5 dbms_output.put_line(rpad(' ',20)||' '||l_file);
6 dbms_output.put_line(rpad(' ',20)||' '||rpad('-',length(l_file),'-'));
7 dbms_output.new_line;
8 dbms_output.put_line(rpad('Exists?',20,'.')||' '||get_file.exists(l_file));
9 dbms_output.put_line(rpad('Name',20,'.')||' '||get_file.name(l_file));
10 dbms_output.put_line(rpad('Path',20,'.')||' '||get_file.path(l_file));
11 dbms_output.put_line(rpad('Absolute path',20,'.')||' '||get_file.absolute_path(l_file));
12 dbms_output.put_line(rpad('Is file?',20,'.')||' '||get_file.is_file(l_file));
13 dbms_output.put_line(rpad('Is directory?',20,'.')||' '||get_file.is_directory(l_file));
14 dbms_output.put_line(rpad('Is hidden?',20,'.')||' '||get_file.is_hidden(l_file));
15 dbms_output.put_line(rpad('Can read?',20,'.')||' '||get_file.can_read(l_file));
16 dbms_output.put_line(rpad('Can write?',20,'.')||' '||get_file.can_write(l_file));
17 dbms_output.put_line(rpad('Exists',20,'.')||' '||get_file.exists(l_file));
18 dbms_output.put_line(rpad('Last modified',20,'.')||' '||
19 TO_CHAR(get_file.last_modified(l_file),'DD/MM/YYYY HH24:MI:SS'));
20 dbms_output.put_line(rpad('Length',20,'.')||' '||get_file.length(l_file));
21 END;
22 /
.\NETWORK\ADMIN\tnsnames.ora
----------------------------
Exists?............. 1
Name................ tnsnames.ora
Path................ .\NETWORK\ADMIN
Absolute path....... E:\ORACLE\ORA11204\.\NETWORK\ADMIN
Is file?............ 1
Is directory?....... 0
Is hidden?.......... 0
Can read?........... 1
Can write?.......... 1
Exists.............. 1
Last modified....... 15/01/2018 11:35:34
Length.............. 4540
PL/SQL procedure successfully completed.
Note that the user must have been granted the following permissions:
GRANT JAVAUSERPRIV TO <user>;
BEGIN
DBMS_JAVA.grant_permission('<user>', 'java.io.FilePermission', '<<ALL FILES>>', 'read');
DBMS_JAVA.grant_permission('<user>', 'SYS:java.lang.RuntimePermission', 'readFileDescriptor', '');
END;
/
And, of course, Java must have been installed inside your database.
|
|
|
|
|
|