73 lines
1.7 KiB
Java
73 lines
1.7 KiB
Java
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// Copyright 2011 Google Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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package com.google.typography.font.compression;
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import com.google.common.io.ByteStreams;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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/**
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* This is a simple wrapper to run a commandline as a pipe. It's not
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* particularly efficient, robust, or featureful.
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*/
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public class Command {
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private class StreamConsumer extends Thread {
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private final InputStream is;
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private byte[] result = null;
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public StreamConsumer(InputStream is) {
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this.is = is;
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}
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@Override
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public void run() {
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try {
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result = ByteStreams.toByteArray(is);
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} catch (IOException e) {
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// TODO: handle this well
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}
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}
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public byte[] getResult() {
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return result;
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}
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}
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private final ProcessBuilder processBuilder;
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public Command(String[] args) {
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processBuilder = new ProcessBuilder(args);
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}
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public CommandResult execute(byte[] input) throws CommandException {
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Process process;
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try {
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process = processBuilder.start();
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} catch (IOException e) {
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throw new CommandException("exec failed");
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}
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StreamConsumer sc = new StreamConsumer(process.getInputStream());
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sc.start();
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OutputStream stdin = process.getOutputStream();
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try {
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stdin.write(input);
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stdin.close();
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} catch (IOException e) {
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throw new CommandException("error writing input");
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}
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try {
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process.waitFor();
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sc.join();
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} catch (InterruptedException e) {
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throw new CommandException("interrupted");
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}
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return new CommandResult(sc.getResult());
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}
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}
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