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// --- BEGIN COPYRIGHT BLOCK ---
// 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; version 2 of the License.
//
// 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cmscore.util;
import java.io.*;
/**
* checks the filename and directory with the specified filter
* checks with multiple "*".
* the filter has to start with a '*' character.
* this to keep the search the same as in the motif version
* <P>
* Copied verbatium from sun.awt.tiny.TinyFileDialogPeer. Used by
* RollingLogFile expiration code
* <P>
* @author mikep
* @version $Revision$, $Date$
*/
public class FileDialogFilter implements FilenameFilter {
String filter;
public FileDialogFilter(String f) {
filter = f;
}
public String toString() {
return filter;
}
/**
* return true if match
*/
public boolean accept(File dir, String fileName) {
File f = new File(dir, fileName);
if (f.isDirectory()) {
return true;
} else {
return searchPattern(fileName, filter);
}
}
/**
* start searching
*/
boolean searchPattern(String fileName, String filter) {
int filterCursor = 0;
int fileNameCursor = 0;
int filterChar = filter.charAt(filterCursor);
if (filterCursor == 0 && filterChar != '*') {
return false;
}
String ls = filter.substring(filterCursor + 1);
return handleStar(fileName, ls);
}
/**
* call this method when character was an *
*/
boolean handleStar(String fileName, String filter) {
int ftLen = filter.length();
int flLen = fileName.length();
char ftChar;
char flChar;
int ftCur = 0;
int flCur = 0;
int c = 0;
if (ftLen == 0) {
return true;
}
while (c < flLen) {
ftChar = filter.charAt(ftCur);
if (ftChar == '*') {
String ls = filter.substring(ftCur + 1);
String fs = fileName.substring(flCur);
if (handleStar(fs, ls)) {
return true;
}
c++;
flCur = c;
ftCur = 0;
continue;
}
flChar = fileName.charAt(flCur);
if (ftChar == flChar) {
ftCur++;
flCur++;
if (flCur == flLen && ftCur == ftLen) {
return true;
}
if (flCur < flLen && ftCur == ftLen) {
return false;
}
if (flCur == flLen) {
c = flLen;
}
} else {
c++;
flCur = c;
ftCur = 0;
if (c == flLen) {
return false;
}
}
}
for (int i = ftCur; i < ftLen; i++) {
ftChar = filter.charAt(i);
if (ftChar != '*') {
return false;
}
}
return true;
}
}
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