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// PathEntry.java -- abstract element of search paths
/* Copyright (C) 1999 Cygnus Solutions
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
/* Author: Kresten Krab Thorup <krab@gnu.org> */
package gnu.gcj.util.path;
import java.util.*;
import java.util.zip.*;
import java.io.*;
import java.net.*;
abstract class PathEntry {
abstract URL getURL (String file);
abstract InputStream getStream (String file);
abstract byte[] getBytes (String file);
/**
* Utility routine like InputStream.read(byte[], 0, len), but will
* read fully, even if all the data is not available at once.
*/
protected static byte[] readbytes (InputStream is, int length)
{
try {
byte[] data = new byte[length];
int read;
int off = 0;
while (off != length)
{
read = is.read (data, off, (int) (length-off));
if (read == -1)
return null;
off += read;
}
return data;
} catch (IOException x) {
return null;
}
}
}
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