public void validate()

in community/mahout-mr/integration/src/main/java/org/apache/mahout/utils/SplitInput.java [603:646]
39 lines of code
17 McCabe index (conditional complexity)

  public void validate() throws IOException {
    Preconditions.checkArgument(testSplitSize >= 1 || testSplitSize == -1,
        "Invalid testSplitSize: " + testSplitSize + ". Must be: testSplitSize >= 1 or testSplitSize = -1");
    Preconditions.checkArgument(splitLocation >= 0 && splitLocation <= 100 || splitLocation == -1,
        "Invalid splitLocation percentage: " + splitLocation + ". Must be: 0 <= splitLocation <= 100 or splitLocation = -1");
    Preconditions.checkArgument(testSplitPct >= 0 && testSplitPct <= 100 || testSplitPct == -1,
        "Invalid testSplitPct percentage: " + testSplitPct + ". Must be: 0 <= testSplitPct <= 100 or testSplitPct = -1");
    Preconditions.checkArgument(testRandomSelectionPct >= 0 && testRandomSelectionPct <= 100
            || testRandomSelectionPct == -1,"Invalid testRandomSelectionPct percentage: " + testRandomSelectionPct +
        ". Must be: 0 <= testRandomSelectionPct <= 100 or testRandomSelectionPct = -1");

    Preconditions.checkArgument(trainingOutputDirectory != null || useMapRed,
        "No training output directory was specified");
    Preconditions.checkArgument(testOutputDirectory != null || useMapRed, "No test output directory was specified");

    // only one of the following may be set, one must be set.
    int count = 0;
    if (testSplitSize > 0) {
      count++;
    }
    if (testSplitPct > 0) {
      count++;
    }
    if (testRandomSelectionSize > 0) {
      count++;
    }
    if (testRandomSelectionPct > 0) {
      count++;
    }

    Preconditions.checkArgument(count == 1, "Exactly one of testSplitSize, testSplitPct, testRandomSelectionSize, "
        + "testRandomSelectionPct should be set");

    if (!useMapRed) {
      Configuration conf = getConf();
      FileSystem fs = trainingOutputDirectory.getFileSystem(conf);
      FileStatus trainingOutputDirStatus = fs.getFileStatus(trainingOutputDirectory);
      Preconditions.checkArgument(trainingOutputDirStatus != null && trainingOutputDirStatus.isDir(),
          "%s is not a directory", trainingOutputDirectory);
      FileStatus testOutputDirStatus = fs.getFileStatus(testOutputDirectory);
      Preconditions.checkArgument(testOutputDirStatus != null && testOutputDirStatus.isDir(),
          "%s is not a directory", testOutputDirectory);
    }
  }