author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 15:09:22 +0300 | |
branch | RCL_3 |
changeset 65 | ae942d28ec0e |
permissions | -rw-r--r-- |
65
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/* |
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* Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Buffered DataSource |
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* |
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*/ |
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|
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|
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package com.nokia.microedition.media; |
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|
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import javax.microedition.media.Control; |
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import javax.microedition.media.protocol.DataSource; |
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import javax.microedition.media.protocol.SourceStream; |
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import java.io.IOException; |
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|
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/** |
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* BufferDataSource is used to read header from DataSource's SourceStream. |
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* This class delegates all method calls to DataSource given in constructor |
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* except getStream method which returns buffered SourceStream. |
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*/ |
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public class BufferDataSource extends DataSource |
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{ |
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// delegated source |
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protected DataSource iDataSource; |
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|
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// buffers DataSource's first stream. |
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protected BufferSourceStream iSourceStream; |
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|
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/** |
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* Constructor. |
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* @param aDataSource delegated DataSource |
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*/ |
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public BufferDataSource(DataSource aDataSource) throws IOException |
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{ |
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super(aDataSource.getLocator()); |
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iDataSource = aDataSource; |
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SourceStream ss = aDataSource.getStreams()[ 0 ]; |
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iSourceStream = new BufferSourceStream(ss); |
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} |
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/** |
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* Return header data. |
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* @return header data |
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*/ |
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public byte[] getHeader() throws IOException |
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{ |
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return iSourceStream.getHeader(); |
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} |
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public int readAndBuffer(byte[] aBuffer, int aOffset, int aLength) throws IOException |
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{ |
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return iSourceStream.readAndBuffer(aBuffer, aOffset, aLength); |
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} |
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/** |
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* from DataSource |
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* @return Content Type |
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* @see DataSource |
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*/ |
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public String getContentType() |
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{ |
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return iDataSource.getContentType(); |
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} |
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/** |
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* from DataSource |
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* Connect to the stream |
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* @throws IOException |
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* @see DataSource |
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*/ |
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public void connect() throws IOException |
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{ |
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iDataSource.connect(); |
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} |
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|
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/** |
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* from DataSource |
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* Disconnect from the stream |
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*/ |
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public void disconnect() |
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{ |
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iDataSource.disconnect(); |
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} |
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|
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/** |
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* from DataSource |
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* Put DataSource to STARTED state |
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* @throws IOException Throw if DataSource is in wrong state |
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* @see DataSource |
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*/ |
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public void start() throws IOException |
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{ |
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iDataSource.start(); |
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} |
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|
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/** |
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* from DataSource |
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* Stops DataSource |
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* @see DataSource |
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*/ |
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public void stop() throws IOException |
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{ |
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iDataSource.stop(); |
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} |
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|
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/** |
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* from DataSource |
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* return sourceStreams of the DataSource |
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* |
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* @return set of source streams |
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* @see DataSource |
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*/ |
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public SourceStream[] getStreams() |
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{ |
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// return all streams from delegated DataSource except first |
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// buffered stream. |
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SourceStream[] originalStreams = iDataSource.getStreams(); |
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SourceStream[] streams = new SourceStream[ originalStreams.length ]; |
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System.arraycopy(originalStreams, 0, |
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streams, 0, originalStreams.length); |
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streams[ 0 ] = iSourceStream; |
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return streams; |
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} |
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|
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/** |
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* from interface Controllable |
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* Method return controls of the DataSource |
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* @return Control |
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* @see Controllable |
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* @see DataSource |
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*/ |
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public Control[] getControls() |
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{ |
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return iDataSource.getControls(); |
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} |
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|
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/** |
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* from interface Controllable |
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* Return a control by the Control Type, not supported |
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* @param controlType type of the control |
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* @return Control |
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*/ |
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public Control getControl(String aControlType) |
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{ |
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return iDataSource.getControl(aControlType); |
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} |
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|
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public DataSource getDataSource() |
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{ |
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return iDataSource; |
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} |
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|
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} |
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// End of File |
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165 |