/* * Copyright (C) 2005-2010 Alfresco Software Limited. * * This file is part of Alfresco * * Alfresco is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Alfresco is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with Alfresco. If not, see . */ package org.alfresco.repo.remote; import java.io.IOException; import java.io.InputStream; import org.alfresco.service.cmr.remote.AVMRemoteTransport; /** * Wrapper around AVMRemote stream reading. * @author britt */ public class AVMRemoteInputStream extends InputStream { /** * The AVMRemote reference. */ private AVMRemoteTransport fAVMRemote; /** * The client ticket holder. */ private ClientTicketHolder fTicketHolder; /** * The handle to the input stream. */ private String fHandle; /** * Construct one. * @param handle The handle returned by getInputStream(); * @param remote The AVMRemote instance. */ public AVMRemoteInputStream(String handle, AVMRemoteTransport remote, ClientTicketHolder ticketHolder) { fHandle = handle; fAVMRemote = remote; fTicketHolder = ticketHolder; } /** * Read in a single byte. * @return The byte as 0-255 or -1 for eof. */ @Override public int read() throws IOException { try { byte [] buff = fAVMRemote.readInput(fTicketHolder.getTicket(), fHandle, 1); if (buff.length == 0) { return -1; } return ((int)buff[0]) & 0xff; } catch (Exception e) { throw new IOException("Remote I/O Error."); } } /** * Read a buffer of bytes. * @param b The buffer into which to put the bytes. * @param off The offset into the buffer. * @param len The number of bytes to read. * @return The actual number of bytes read or -1 on eof. */ @Override public int read(byte[] b, int off, int len) throws IOException { try { byte [] buff = fAVMRemote.readInput(fTicketHolder.getTicket(), fHandle, len); if (buff.length == 0) { return -1; } System.arraycopy(buff, 0, b, off, buff.length); return buff.length; } catch (Exception e) { throw new IOException("Remote I/O Error."); } } /** * Close the underlying AVMRemote handle. */ @Override public void close() throws IOException { try { fAVMRemote.closeInputHandle(fTicketHolder.getTicket(), fHandle); } catch (Exception e) { throw new IOException("Remote Error closing input stream."); } } }