diff options
Diffstat (limited to 'src/traffic-incidents-service/org.genivi.trafficinfo.libmatthew/src/main/java/cx/ath/matthew/io/ExecInputStream.java')
-rwxr-xr-x | src/traffic-incidents-service/org.genivi.trafficinfo.libmatthew/src/main/java/cx/ath/matthew/io/ExecInputStream.java | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/src/traffic-incidents-service/org.genivi.trafficinfo.libmatthew/src/main/java/cx/ath/matthew/io/ExecInputStream.java b/src/traffic-incidents-service/org.genivi.trafficinfo.libmatthew/src/main/java/cx/ath/matthew/io/ExecInputStream.java new file mode 100755 index 0000000..517cded --- /dev/null +++ b/src/traffic-incidents-service/org.genivi.trafficinfo.libmatthew/src/main/java/cx/ath/matthew/io/ExecInputStream.java @@ -0,0 +1,142 @@ +/* + * Java Exec Pipe Library + * + * Copyright (c) Matthew Johnson 2005 + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * To Contact the author, please email src@matthew.ath.cx + * + */ + +package cx.ath.matthew.io; + +import java.io.FilterInputStream; +import java.io.InputStream; +import java.io.IOException; +import java.io.OutputStream; + +/** + * Class to pipe an InputStream through a command using stdin/stdout. + * E.g. + * <pre> + * Reader r = new InputStreamReader(new ExecInputStream(new FileInputStream("file"), "command")); + * </pre> + */ +public class ExecInputStream extends FilterInputStream +{ + private Process proc; + private InputStream stdout; + private OutputStream stdin; + private InOutCopier copy; + + /** + * Create a new ExecInputStream on the given InputStream + * using the process to filter the stream. + * @param is Reads from this InputStream + * @param p Filters data through stdin/out on this Process + */ + public ExecInputStream(InputStream is, Process p) throws IOException + { + super(is); + proc = p; + stdin = p.getOutputStream(); + stdout = p.getInputStream(); + copy = new InOutCopier(in, stdin); + copy.start(); + } + /** + * Create a new ExecInputStream on the given InputStream + * using the process to filter the stream. + * @param is Reads from this InputStream + * @param cmd Creates a Process from this string to filter data through stdin/out + */ + public ExecInputStream(InputStream is, String cmd) throws IOException + { this(is, Runtime.getRuntime().exec(cmd)); } + /** + * Create a new ExecInputStream on the given InputStream + * using the process to filter the stream. + * @param is Reads from this InputStream + * @param cmd Creates a Process from this string array (command, arg, ...) to filter data through stdin/out + */ + public ExecInputStream(InputStream is, String[] cmd) throws IOException + { this(is, Runtime.getRuntime().exec(cmd)); } + /** + * Create a new ExecInputStream on the given InputStream + * using the process to filter the stream. + * @param is Reads from this InputStream + * @param cmd Creates a Process from this string to filter data through stdin/out + * @param env Setup the environment for the command + */ + public ExecInputStream(InputStream is, String cmd, String[] env) throws IOException + { this(is, Runtime.getRuntime().exec(cmd, env)); } + /** + * Create a new ExecInputStream on the given InputStream + * using the process to filter the stream. + * @param is Reads from this InputStream + * @param cmd Creates a Process from this string array (command, arg, ...) to filter data through stdin/out + * @param env Setup the environment for the command + */ + public ExecInputStream(InputStream is, String[] cmd, String[] env) throws IOException + { this(is, Runtime.getRuntime().exec(cmd, env)); } + + public void close() throws IOException + { + try { + proc.waitFor(); + } catch (InterruptedException Ie) {} + //copy.close(); + try { + copy.join(); + } catch (InterruptedException Ie) {} + stdin.close(); + in.close(); + stdout.close(); + } + public void flush() throws IOException + { + copy.flush(); + } + public int available() throws IOException + { return stdout.available(); } + public int read() throws IOException + { return stdout.read(); } + public int read(byte[] b) throws IOException + { return stdout.read(b); } + public int read(byte[] b, int off, int len) throws IOException + { return stdout.read(b, off, len); } + public long skip(long n) throws IOException + { return stdout.skip(n); } + public void mark(int readlimit) + {} + public boolean markSupported() + { return false; } + public void reset() + {} + + public void finalize() + { + try { + close(); + } catch (Exception e) {} + } +} + + + |