Java 类org.apache.tools.ant.DemuxInputStream 实例源码

private void runBuild(File buildFile, Vector<String> targets, int messageLevel) throws BuildException {

        final Project project = new Project();
        project.setCoreLoader(null);

        Throwable error = null;

        try {
            addBuildListeners(project, messageLevel);
            addInputHandler(project, null);

            PrintStream err = System.err;
            PrintStream out = System.out;
            InputStream in = System.in;

            // use a system manager that prevents from System.exit()
            SecurityManager oldsm = null;
            oldsm = System.getSecurityManager();

            // SecurityManager can not be installed here for backwards
            // compatibility reasons (PD). Needs to be loaded prior to
            // ant class if we are going to implement it.
            // System.setSecurityManager(new NoExitSecurityManager());
            try {
                project.setDefaultInputStream(System.in);
                System.setIn(new DemuxInputStream(project));
                System.setOut(new PrintStream(new DemuxOutputStream(project, false)));
                System.setErr(new PrintStream(new DemuxOutputStream(project, true)));

                project.fireBuildStarted();

                project.init();
                project.setUserProperty("ant.version", Main.getAntVersion());

                project.setUserProperty("ant.file", buildFile.getAbsolutePath());

                ProjectHelper.configureProject(project, buildFile);

                // make sure that we have a target to execute
                if (targets.size() == 0 && project.getDefaultTarget() != null) {
                    targets.addElement(project.getDefaultTarget());
                }

                project.executeTargets(targets);
            } finally {
                // put back the original security manager
                // The following will never eval to true. (PD)
                if (oldsm != null) {
                    System.setSecurityManager(oldsm);
                }

                System.setOut(out);
                System.setErr(err);
                System.setIn(in);
            }
        } catch (RuntimeException | Error exc) {
            error = exc;
            throw exc;
        } finally {
            project.fireBuildFinished(error);
        }
    }