1069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project/* 2069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/conn/EofSensorInputStream.java $ 3069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * $Revision: 672367 $ 4069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * $Date: 2008-06-27 12:49:20 -0700 (Fri, 27 Jun 2008) $ 5069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 6069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * ==================================================================== 7069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 8069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Licensed to the Apache Software Foundation (ASF) under one or more 9069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * contributor license agreements. See the NOTICE file distributed with 10069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * this work for additional information regarding copyright ownership. 11069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * The ASF licenses this file to You under the Apache License, Version 2.0 12069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * (the "License"); you may not use this file except in compliance with 13069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * the License. You may obtain a copy of the License at 14069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 15069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 16069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 17069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 18069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 19069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 20069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * See the License for the specific language governing permissions and 21069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * limitations under the License. 22069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * ==================================================================== 23069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 24069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * This software consists of voluntary contributions made by many 25069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * individuals on behalf of the Apache Software Foundation. For more 26069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * information on the Apache Software Foundation, please see 27069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <http://www.apache.org/>. 28069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 29069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 30069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 31069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectpackage org.apache.http.conn; 32069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 33069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.io.InputStream; 34069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectimport java.io.IOException; 35069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 36069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 37069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project/** 38069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * A stream wrapper that triggers actions on {@link #close close()} and EOF. 39069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Primarily used to auto-release an underlying 40069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * {@link ManagedClientConnection connection} 41069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * when the response body is consumed or no longer needed. 42069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 43069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <p> 44069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * This class is based on <code>AutoCloseInputStream</code> in HttpClient 3.1, 45069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * but has notable differences. It does not allow mark/reset, distinguishes 46069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * different kinds of event, and does not always close the underlying stream 47069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * on EOF. That decision is left to the {@link EofSensorWatcher watcher}. 48069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * </p> 49069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 50069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @see EofSensorWatcher EofSensorWatcher 51069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 52069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @author <a href="mailto:rolandw at apache.org">Roland Weber</a> 53069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @author Ortwin Glueck 54069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @author Eric Johnson 55069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @author <a href="mailto:mbowler@GargoyleSoftware.com">Mike Bowler</a> 56069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 57069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 58069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <!-- empty lines to avoid svn diff problems --> 59069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @version $Revision: 672367 $ 60069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 61069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @since 4.0 62069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 63069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project// don't use FilterInputStream as the base class, we'd have to 64069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project// override markSupported(), mark(), and reset() to disable them 65069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Projectpublic class EofSensorInputStream extends InputStream 66069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project implements ConnectionReleaseTrigger { 67069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 68069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 69069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * The wrapped input stream, while accessible. 70069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * The value changes to <code>null</code> when the wrapped stream 71069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * becomes inaccessible. 72069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 73069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project protected InputStream wrappedStream; 74069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 75069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 76069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 77069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Indicates whether this stream itself is closed. 78069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * If it isn't, but {@link #wrappedStream wrappedStream} 79069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * is <code>null</code>, we're running in EOF mode. 80069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * All read operations will indicate EOF without accessing 81069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * the underlying stream. After closing this stream, read 82069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * operations will trigger an {@link IOException IOException}. 83069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 84069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @see #isReadAllowed isReadAllowed 85069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 86069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project private boolean selfClosed; 87069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 88069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** The watcher to be notified, if any. */ 89069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project private EofSensorWatcher eofWatcher; 90069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 91069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 92069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 93069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Creates a new EOF sensor. 94069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * If no watcher is passed, the underlying stream will simply be 95069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * closed when EOF is detected or {@link #close close} is called. 96069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Otherwise, the watcher decides whether the underlying stream 97069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * should be closed before detaching from it. 98069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 99069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param in the wrapped stream 100069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param watcher the watcher for events, or <code>null</code> for 101069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * auto-close behavior without notification 102069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 103069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public EofSensorInputStream(final InputStream in, 104069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project final EofSensorWatcher watcher) { 105069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (in == null) { 106069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw new IllegalArgumentException 107069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project ("Wrapped stream may not be null."); 108069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 109069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 110069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project wrappedStream = in; 111069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project selfClosed = false; 112069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project eofWatcher = watcher; 113069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 114069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 115069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 116069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 117069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Checks whether the underlying stream can be read from. 118069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 119069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @return <code>true</code> if the underlying stream is accessible, 120069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <code>false</code> if this stream is in EOF mode and 121069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * detached from the underlying stream 122069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 123069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @throws IOException if this stream is already closed 124069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 125069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project protected boolean isReadAllowed() throws IOException { 126069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (selfClosed) { 127069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw new IOException("Attempted read on closed stream."); 128069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 129069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return (wrappedStream != null); 130069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 131069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 132069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 133069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // non-javadoc, see base class InputStream 134069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project @Override 135069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public int read() throws IOException { 136069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project int l = -1; 137069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 138069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (isReadAllowed()) { 139069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project try { 140069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project l = wrappedStream.read(); 141069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project checkEOF(l); 142069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } catch (IOException ex) { 143069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project checkAbort(); 144069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw ex; 145069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 146069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 147069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 148069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return l; 149069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 150069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 151069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 152069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // non-javadoc, see base class InputStream 153069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project @Override 154069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public int read(byte[] b, int off, int len) throws IOException { 155069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project int l = -1; 156069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 157069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (isReadAllowed()) { 158069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project try { 159069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project l = wrappedStream.read(b, off, len); 160069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project checkEOF(l); 161069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } catch (IOException ex) { 162069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project checkAbort(); 163069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw ex; 164069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 165069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 166069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 167069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return l; 168069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 169069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 170069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 171069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // non-javadoc, see base class InputStream 172069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project @Override 173069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public int read(byte[] b) throws IOException { 174069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project int l = -1; 175069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 176069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (isReadAllowed()) { 177069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project try { 178069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project l = wrappedStream.read(b); 179069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project checkEOF(l); 180069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } catch (IOException ex) { 181069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project checkAbort(); 182069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw ex; 183069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 184069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 185069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return l; 186069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 187069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 188069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 189069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // non-javadoc, see base class InputStream 190069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project @Override 191069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public int available() throws IOException { 192069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project int a = 0; // not -1 193069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 194069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (isReadAllowed()) { 195069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project try { 196069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project a = wrappedStream.available(); 197069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // no checkEOF() here, available() can't trigger EOF 198069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } catch (IOException ex) { 199069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project checkAbort(); 200069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project throw ex; 201069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 202069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 203069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 204069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project return a; 205069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 206069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 207069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 208069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // non-javadoc, see base class InputStream 209069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project @Override 210069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public void close() throws IOException { 211069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // tolerate multiple calls to close() 212069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project selfClosed = true; 213069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project checkClose(); 214069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 215069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 216069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 217069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 218069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Detects EOF and notifies the watcher. 219069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * This method should only be called while the underlying stream is 220069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * still accessible. Use {@link #isReadAllowed isReadAllowed} to 221069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * check that condition. 222069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * <br/> 223069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * If EOF is detected, the watcher will be notified and this stream 224069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * is detached from the underlying stream. This prevents multiple 225069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * notifications from this stream. 226069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 227069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @param eof the result of the calling read operation. 228069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * A negative value indicates that EOF is reached. 229069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 230069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @throws IOException 231069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * in case of an IO problem on closing the underlying stream 232069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 233069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project protected void checkEOF(int eof) throws IOException { 234069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 235069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if ((wrappedStream != null) && (eof < 0)) { 236069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project try { 237069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project boolean scws = true; // should close wrapped stream? 238069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (eofWatcher != null) 239069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project scws = eofWatcher.eofDetected(wrappedStream); 240069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (scws) 241069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project wrappedStream.close(); 242069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } finally { 243069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project wrappedStream = null; 244069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 245069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 246069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 247069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 248069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 249069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 250069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Detects stream close and notifies the watcher. 251069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * There's not much to detect since this is called by {@link #close close}. 252069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * The watcher will only be notified if this stream is closed 253069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * for the first time and before EOF has been detected. 254069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * This stream will be detached from the underlying stream to prevent 255069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * multiple notifications to the watcher. 256069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 257069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @throws IOException 258069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * in case of an IO problem on closing the underlying stream 259069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 260069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project protected void checkClose() throws IOException { 261069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 262069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (wrappedStream != null) { 263069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project try { 264069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project boolean scws = true; // should close wrapped stream? 265069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (eofWatcher != null) 266069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project scws = eofWatcher.streamClosed(wrappedStream); 267069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (scws) 268069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project wrappedStream.close(); 269069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } finally { 270069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project wrappedStream = null; 271069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 272069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 273069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 274069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 275069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 276069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 277069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Detects stream abort and notifies the watcher. 278069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * There's not much to detect since this is called by 279069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * {@link #abortConnection abortConnection}. 280069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * The watcher will only be notified if this stream is aborted 281069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * for the first time and before EOF has been detected or the 282069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * stream has been {@link #close closed} gracefully. 283069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * This stream will be detached from the underlying stream to prevent 284069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * multiple notifications to the watcher. 285069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * 286069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * @throws IOException 287069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * in case of an IO problem on closing the underlying stream 288069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 289069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project protected void checkAbort() throws IOException { 290069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 291069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (wrappedStream != null) { 292069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project try { 293069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project boolean scws = true; // should close wrapped stream? 294069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (eofWatcher != null) 295069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project scws = eofWatcher.streamAbort(wrappedStream); 296069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project if (scws) 297069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project wrappedStream.close(); 298069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } finally { 299069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project wrappedStream = null; 300069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 301069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 302069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 303069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 304069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 305069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 306069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Same as {@link #close close()}. 307069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 308069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public void releaseConnection() throws IOException { 309069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project this.close(); 310069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 311069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 312069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project /** 313069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * Aborts this stream. 314069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * This is a special version of {@link #close close()} which prevents 315069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * re-use of the underlying connection, if any. Calling this method 316069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * indicates that there should be no attempt to read until the end of 317069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project * the stream. 318069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project */ 319069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project public void abortConnection() throws IOException { 320069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project // tolerate multiple calls 321069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project selfClosed = true; 322069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project checkAbort(); 323069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project } 324069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 325069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project} // class EOFSensorInputStream 326069490a5ca2fd1988d29daf45d892f47ad665115The Android Open Source Project 327