| /******************************************************************************* |
| * Copyright (c) 2001, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Jens Lukowski/Innoopract - initial renaming/restructuring |
| * |
| *******************************************************************************/ |
| package org.eclipse.wst.sse.core.internal.encoding.util; |
| |
| import java.io.BufferedInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| public class BufferedLimitedStream extends BufferedInputStream { |
| |
| private int limitedCount; |
| |
| public BufferedLimitedStream(InputStream inStream, int size) { |
| super(inStream, size); |
| mark(size); |
| try { |
| limitedCount = Math.min(size, inStream.available()); |
| } catch (IOException e) { |
| // unlikely |
| limitedCount = 0; |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.io.InputStream#available() |
| */ |
| public synchronized int available() throws IOException { |
| |
| return limitedCount - pos; |
| } |
| |
| /** |
| * copied down from super class |
| */ |
| private void ensureOpen() throws IOException { |
| if (in == null) |
| throw new IOException("Stream closed"); //$NON-NLS-1$ |
| } |
| |
| /** |
| * copied down from super class then, changed to simiulate EOF if goes |
| * beyond buffered amount |
| */ |
| public synchronized int read() throws IOException { |
| ensureOpen(); |
| // for this special stream, indicate "end of file" when buffer is |
| // full |
| if (pos >= limitedCount) { |
| return -1; |
| } |
| return super.read(); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.io.InputStream#read(byte[], int, int) |
| */ |
| public synchronized int read(byte[] b, int off, int len) throws IOException { |
| // for this special stream, indicate "end of file" when buffer is |
| // full |
| if (pos >= limitedCount) { |
| return -1; |
| } |
| return super.read(b, off, len); |
| } |
| } |