| /******************************************************************************* |
| * Copyright (c) 2000, 2007 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 |
| *******************************************************************************/ |
| package org.eclipse.wst.jsdt.core.tests.runtime; |
| |
| import java.io.*; |
| |
| /** |
| * Workaround problem with input stream from a <code>java.lang.Process</code> |
| * that throws an <code>IOException</code> even if there is something to read. |
| */ |
| public class VMInputStream extends InputStream { |
| InputStream input; |
| Process process; |
| public VMInputStream(Process process, InputStream input) { |
| this.process= process; |
| this.input= input; |
| } |
| public int available() throws IOException { |
| return this.input.available(); |
| } |
| public void close() throws IOException { |
| this.input.close(); |
| } |
| private boolean isRunning() { |
| if (this.process == null) { |
| return false; |
| } |
| boolean hasExited; |
| try { |
| this.process.exitValue(); |
| hasExited = true; |
| } catch (IllegalThreadStateException e) { |
| hasExited = false; |
| } |
| return !hasExited; |
| } |
| public synchronized void mark(int readlimit) { |
| this.input.mark(readlimit); |
| } |
| public boolean markSupported() { |
| return this.input.markSupported(); |
| } |
| public int read() throws IOException { |
| try { |
| return this.input.read(); |
| } catch (IOException e) { |
| if (isRunning()) { |
| return read(); |
| } |
| throw e; |
| } |
| } |
| public int read(byte b[]) throws IOException { |
| // Make sure the byte array is initialized (value of 0 is used in the workaround below) |
| for (int i=0;i<b.length;i++) |
| b[i]=0; |
| |
| int read; |
| try { |
| read = this.input.read(b); |
| } catch (IOException e) { |
| if (isRunning()) { |
| // Workaround problem with implementation of Process.getInputStream() |
| // (see PR 1PRW670: LFRE:WINNT - Program hangs running in LeapFrog) |
| read= 0; |
| while (read < b.length && b[read] != 0) { |
| read++; |
| } |
| } else |
| throw e; |
| } |
| |
| return read; |
| } |
| public int read(byte b[], int off, int len) throws IOException { |
| // Make sure the byte array is initialized (value of 0 is used in the workaround below) |
| for (int i = off; i < len; i++) |
| b[i] = 0; |
| |
| int read; |
| try { |
| read = this.input.read(b, off, len); |
| } catch (IOException e) { |
| if (isRunning()) { |
| // Workaround problem with implementation of Process.getInputStream() |
| // (see PR 1PRW670: LFRE:WINNT - Program hangs running in LeapFrog) |
| read = 0; |
| while (off + read < len && b[off + read] != 0) { |
| read++; |
| } |
| } else |
| throw e; |
| } |
| return read; |
| } |
| public synchronized void reset() throws IOException { |
| this.input.reset(); |
| } |
| public long skip(long n) throws IOException { |
| return this.input.skip(n); |
| } |
| } |