| /** |
| * $RCSfile$ |
| * $Revision$ |
| * $Date$ |
| * |
| * Copyright 2003-2007 Jive Software. |
| * |
| * All rights reserved. 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 org.jivesoftware.smack.util; |
| |
| import java.io.*; |
| import java.util.*; |
| |
| /** |
| * An ObservableReader is a wrapper on a Reader that notifies to its listeners when |
| * reading character streams. |
| * |
| * @author Gaston Dombiak |
| */ |
| public class ObservableReader extends Reader { |
| |
| Reader wrappedReader = null; |
| List<ReaderListener> listeners = new ArrayList<ReaderListener>(); |
| |
| public ObservableReader(Reader wrappedReader) { |
| this.wrappedReader = wrappedReader; |
| } |
| |
| public int read(char[] cbuf, int off, int len) throws IOException { |
| int count = wrappedReader.read(cbuf, off, len); |
| if (count > 0) { |
| String str = new String(cbuf, off, count); |
| // Notify that a new string has been read |
| ReaderListener[] readerListeners = null; |
| synchronized (listeners) { |
| readerListeners = new ReaderListener[listeners.size()]; |
| listeners.toArray(readerListeners); |
| } |
| for (int i = 0; i < readerListeners.length; i++) { |
| readerListeners[i].read(str); |
| } |
| } |
| return count; |
| } |
| |
| public void close() throws IOException { |
| wrappedReader.close(); |
| } |
| |
| public int read() throws IOException { |
| return wrappedReader.read(); |
| } |
| |
| public int read(char cbuf[]) throws IOException { |
| return wrappedReader.read(cbuf); |
| } |
| |
| public long skip(long n) throws IOException { |
| return wrappedReader.skip(n); |
| } |
| |
| public boolean ready() throws IOException { |
| return wrappedReader.ready(); |
| } |
| |
| public boolean markSupported() { |
| return wrappedReader.markSupported(); |
| } |
| |
| public void mark(int readAheadLimit) throws IOException { |
| wrappedReader.mark(readAheadLimit); |
| } |
| |
| public void reset() throws IOException { |
| wrappedReader.reset(); |
| } |
| |
| /** |
| * Adds a reader listener to this reader that will be notified when |
| * new strings are read. |
| * |
| * @param readerListener a reader listener. |
| */ |
| public void addReaderListener(ReaderListener readerListener) { |
| if (readerListener == null) { |
| return; |
| } |
| synchronized (listeners) { |
| if (!listeners.contains(readerListener)) { |
| listeners.add(readerListener); |
| } |
| } |
| } |
| |
| /** |
| * Removes a reader listener from this reader. |
| * |
| * @param readerListener a reader listener. |
| */ |
| public void removeReaderListener(ReaderListener readerListener) { |
| synchronized (listeners) { |
| listeners.remove(readerListener); |
| } |
| } |
| |
| } |