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package tim.prune.load;
import java.io.File;
import javax.swing.filechooser.FileFilter;
import tim.prune.I18nManager;
/**
* Class to act as a generic file filter based on file extension
*/
public class GenericFileFilter extends FileFilter
{
/** Filter description for display */
private String _filterDesc = null;
/** Array of allowed three-character suffixes */
private String[] _threeCharSuffixes = null;
/** Array of allowed four-character suffixes */
private String[] _fourCharSuffixes = null;
/**
* Constructor
* @param inDescKey key for filter description
* @param inSuffixes array of allowed 3- and 4-character file suffixes
*/
public GenericFileFilter(String inDescKey, String[] inSuffixes)
{
_filterDesc = I18nManager.getText(inDescKey);
if (inSuffixes != null && inSuffixes.length > 0)
{
_threeCharSuffixes = new String[inSuffixes.length];
_fourCharSuffixes = new String[inSuffixes.length];
int threeIndex = 0, fourIndex = 0;
for (String suffix : inSuffixes)
{
if (suffix != null)
{
suffix = suffix.trim().toLowerCase();
if (suffix.length() == 3) {
_threeCharSuffixes[threeIndex++] = suffix;
}
else if (suffix.length() == 4) {
_fourCharSuffixes[fourIndex++] = suffix;
}
}
}
}
}
/**
* Check whether to accept the specified file or not
* @see javax.swing.filechooser.FileFilter#accept(java.io.File)
*/
public boolean accept(File inFile)
{
return inFile.isDirectory() || acceptFilename(inFile.getName());
}
/**
* Check whether to accept the given filename
* @param inName name of file
* @return true if accepted, false otherwise
*/
public boolean acceptFilename(String inName)
{
if (inName != null)
{
final int nameLen = inName.length();
if (nameLen > 4)
{
// Check for three character suffixes
char currChar = inName.charAt(nameLen - 4);
if (currChar == '.')
{
return acceptFilename(inName.substring(nameLen - 3).toLowerCase(), _threeCharSuffixes);
}
// check for four character suffixes
currChar = inName.charAt(nameLen - 5);
if (currChar == '.')
{
return acceptFilename(inName.substring(nameLen - 4).toLowerCase(), _fourCharSuffixes);
}
}
}
// Not matched so don't accept
return false;
}
/**
* Check whether to accept the given filename
* @param inSuffixToCheck suffix to check
* @param inAllowedSuffixes array of allowed suffixes
* @return true if accepted, false otherwise
*/
private static boolean acceptFilename(String inSuffixToCheck, String[] inAllowedSuffixes)
{
if (inSuffixToCheck != null && inAllowedSuffixes != null)
{
// Loop over allowed suffixes
for (String allowed : inAllowedSuffixes)
{
if (allowed != null && inSuffixToCheck.equals(allowed)) {
return true;
}
}
}
// Fallen through so not allowed
return false;
}
/**
* Get description
* @see javax.swing.filechooser.FileFilter#getDescription()
*/
public String getDescription()
{
return _filterDesc;
}
}
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