How to use

isEmpty

method

in

org.apache.tools.ant.types.Path

  private boolean haveEntries(Path p) {
    return !(p == null || p.isEmpty());
  }
}

/**
 * Checks if a path exists and is non empty.
 * @param path to be checked
 * @return true if the path is non <code>null</code> and non empty.
 * @since 1.9.7
 */
private static boolean hasPath(final Path path) {
  return path != null && !path.isEmpty();
}

private void checkPackages(final List<String> packagesToDoc, final Path sourceDirs) {
  if (!packagesToDoc.isEmpty() && sourceDirs.isEmpty()) {
    throw new BuildException(
      "sourcePath attribute must be set when specifying package names.");
  }
}

private void doSourcePath(final Commandline toExecute, final Path sourceDirs) {
  if (!sourceDirs.isEmpty()) {
    toExecute.createArgument().setValue("-sourcepath");
    toExecute.createArgument().setPath(sourceDirs);
  }
}

/**
 * Execute the task.
 * @throws BuildException if errors occur.
 */
@Override
public void execute() throws BuildException {
  if (sources == null) {
   throw new BuildException(
     "At least one set of source resources must be specified");
  }
  if (targets == null) {
   throw new BuildException(
     "At least one set of target files must be specified");
  }
  //no sources = nothing to compare; no targets = nothing to delete:
  if (!sources.isEmpty() && !targets.isEmpty() && !uptodate(sources, targets)) {
    log("Deleting all target files.", Project.MSG_VERBOSE);
    if (verbose) {
      for (String t : targets.list()) {
        log("Deleting " + t);
      }
    }
    Delete delete = new Delete();
    delete.bindToOwner(this);
    delete.add(targets);
    delete.perform();
  }
}

final Path tagletPath = tagletInfo.getPath()
  .concatSystemClasspath("ignore");
if (!tagletPath.isEmpty()) {
  toExecute.createArgument()
    .setValue("-tagletpath");

if (!p.isEmpty()) {
  classpath.append(p);

if (!sourcepath.isEmpty()) {
  cmd.createArgument().setValue("-sourcepath");
  cmd.createArgument().setPath(sourcepath);
if (bootclasspath == null || bootclasspath.isEmpty()) {
if (extdirs != null && !extdirs.isEmpty()) {
  cmd.createArgument().setValue("-extdirs");
  cmd.createArgument().setPath(extdirs);
if (!boot.isEmpty()) {
  cmd.createArgument().setValue("-bootclasspath");
  cmd.createArgument().setPath(boot);

if (!msp.isEmpty()) {
  cmd.createArgument().setValue("--module-source-path");
  cmd.createArgument().setPath(msp);
if (!mp.isEmpty()) {
  cmd.createArgument().setValue("--module-path");
  cmd.createArgument().setPath(mp);
if (!ump.isEmpty()) {
  cmd.createArgument().setValue("--upgrade-module-path");
  cmd.createArgument().setPath(ump);

if (!p.isEmpty()) {
  cp.append(p);

  if (!bp.isEmpty()) {
    cmd.createArgument().setValue("-bootclasspath");
    cmd.createArgument().setPath(bp);
if (extdirs != null && !extdirs.isEmpty()) {
  cmd.createArgument().setValue("-extdirs");
  cmd.createArgument().setPath(extdirs);

if (!p.isEmpty()) {
  classpath.append(p);