import org.apache.tools.ant.types.FileSet; //导入方法依赖的package包/类
public void execute() throws BuildException {
if (outputDir == null) {
throw new BuildException ("no output directory declared!");
}
if (!outputDir.exists()) {
throw new BuildException ("Output directory doesn't exist:" + outputDir);
}
String javaHome = System.getProperty("java.home");
String javaBin = javaHome + File.separator + "bin" + File.separator + "java";
String classpath = System.getProperty("java.class.path");
// add on our own paths
String allPaths = "";
for (Path p : paths) {
classpath += ":" + p.toString();
}
for (FileSet fs : filesets) {
for (Iterator it = fs.iterator(); it.hasNext(); ) {
FileResource res = (FileResource) it.next();
// convert name into CLASS (trim .java and replace slashes)
String name = res.getName();
name = name.substring (0, name.length()-5);
String className = name.replace('/', '.');
try {
ProcessBuilder builder = new ProcessBuilder(javaBin, "-cp", classpath, className);
Process process = builder.start();
// process output
InputStream is = process.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader (isr);
File outFile = new File (outputDir, className + ".output");
PrintStream ps = new PrintStream (outFile);
// generic start/stop info for each output file.
Date d = new Date();
ps.println ("Start:" + d.getTime() + " [" + d + "]");
String s;
int nb = 0;
while ((s = br.readLine()) != null) {
nb += s.length();
ps.println(s);
}
// generic end
d = new Date();
ps.println ("End:" + d.getTime() + " [" + d + "]");
ps.close();
int ev = process.exitValue();
System.out.println (className + " [" + nb + " bytes output, exit code:" + ev + "]");
} catch (Exception e) {
throw new BuildException ("unable to process class " + className + ": " + e.getMessage());
}
}
}
}