package org.audit4j.core.extra.scannotation;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
/**
* @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
* @version $Revision: 1 $
*/
public class FileIterator implements StreamIterator
{
private final ArrayList files;
private int index = 0;
public FileIterator(File file, Filter filter)
{
files = new ArrayList();
try
{
create(files, file, filter);
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
protected static void create(List list, File dir, Filter filter) throws Exception
{
create(list, dir, filter, dir.getCanonicalPath());
}
protected static void create(List list, File dir, Filter filter, String prefix) throws Exception
{
File[] files = dir.listFiles();
for (int i = 0; i < files.length; i++)
{
if (files[i].isDirectory())
{
create(list, files[i], filter, prefix);
}
else
{
String path = files[i].getCanonicalPath();
String relativePath = path.substring(prefix.length() + 1);
if (File.separatorChar == '\\')
relativePath = relativePath.replace('\\', '/');
if (filter == null || filter.accepts(relativePath))
{
list.add(files[i]);
}
}
}
}
@Override
public InputStream next()
{
if (index >= files.size()) {
return null;
}
File fp = (File) files.get(index++);
try
{
return new FileInputStream(fp);
}
catch (FileNotFoundException e)
{
throw new RuntimeException(e);
}
}
@Override
public void close()
{
}
}