/*
* #!
* Ontopia Engine
* #-
* Copyright (C) 2001 - 2013 The Ontopia Project
* #-
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* !#
*/
package net.ontopia.utils;
import java.io.IOException;
import java.io.InputStream;
/**
* INTERNAL: Input stream for reading in a encrypted input stream (for
* example from a file) and giving back the decrypted values.
*/
public class EncryptedInputStream extends InputStream {
final static int KEY = 0xFF;
InputStream myInput;
public EncryptedInputStream(InputStream myInputStream) {
super();
this.myInput = myInputStream;
}
public int read() throws IOException {
int b = myInput.read();
int plain;
// only if not end of file is reached
if (b != -1)
plain = b ^ KEY;
else
plain = -1;
return plain;
}
}