Minor enhancements to http client

src/main/java/com/zavtech/morpheus/reference/XDataFrameSmooth.java

@@ -52,13 +52,17 @@ public DataFrame<R,C> sma(double windowSize) {
  @Override
  public DataFrame<R,C> ema(double halfLife) {
  try {
- if (!inPlace) {
+ if (halfLife < 0) {
+ throw new IllegalArgumentException("Half-life for smoothing must be >= 0, " + halfLife + " is illegal");
+ } else if (halfLife == 0d) {
+ return frame;
+ } else if (!inPlace) {
  return frame.copy().smooth(true).ema(halfLife);
  } else {
  final int rowCount = frame.rows().count();
  if (rowCount > 0) {
  final int colCount = frame.cols().count();
- for (int colIndex=0; colIndex<colCount; ++colIndex) {
+ for (int colIndex = 0; colIndex < colCount; ++colIndex) {
  final double value = frame.data().getDouble(0, colIndex);
  frame.data().setDouble(0, colIndex, value);
  }
@@ -68,7 +72,7 @@ public DataFrame<R,C> ema(double halfLife) {
  if (rowOrdinal > 0) {
  row.forEachValue(v -> {
  final double rawValue = v.getDouble();
- final double emaPrior = v.col().getDouble(rowOrdinal-1);
+ final double emaPrior = v.col().getDouble(rowOrdinal - 1);
  final double emaValue = rawValue * alpha + (1d - alpha) * emaPrior;
  v.setDouble(emaValue);
  });
@@ -77,7 +81,7 @@ public DataFrame<R,C> ema(double halfLife) {
  }
  return frame;
  }
- } catch (DataFrameException ex) {
+ } catch (IllegalArgumentException ex) {
  throw ex;
  } catch (Exception ex) {
  throw new DataFrameException("Failed to apply EWMA smoothing to DataFrame", ex);

src/main/java/com/zavtech/morpheus/util/http/HttpClient.java

@@ -25,6 +25,7 @@
 import java.util.List;
 import java.util.Optional;
 import java.util.function.Consumer;
+import java.util.zip.GZIPInputStream;
 
 import com.zavtech.morpheus.util.IO;
 import com.zavtech.morpheus.util.Initialiser;
@@ -217,14 +218,36 @@ private static class DefaultResponse implements HttpResponse {
  });
  }
 
+ /**
+ * Returns the content encoding for response
+ * @return the content encoding
+ */
+ private Optional<String> getContentEncoding() {
+ for (HttpHeader header : headers) {
+ if (header.getKey().equals("Content-Encoding")) {
+ return Optional.ofNullable(header.getValue());
+ }
+ }
+ return Optional.empty();
+ }
+
  @Override
  public HttpStatus getStatus() {
  return status;
  }
 
  @Override
  public InputStream getStream() {
- return stream;
+ try {
+ final String encoding = getContentEncoding().orElse("default").toLowerCase();
+ if (encoding.equalsIgnoreCase("gzip")) {
+ return new GZIPInputStream(stream);
+ } else {
+ return stream;
+ }
+ } catch (Exception ex) {
+ throw new RuntimeException("Failed to read from input stream", ex);
+ }
  }
 
  @Override

src/main/java/com/zavtech/morpheus/util/text/SmartFormat.java

@@ -61,9 +61,11 @@ public class SmartFormat extends java.text.Format {
  private Matcher timeMatcher1 = Pattern.compile(TIME_REGEX_1).matcher("");
  private Matcher timeMatcher2 = Pattern.compile(TIME_REGEX_2).matcher("");
 
- private Format decimalFormat1 = new DecimalFormat("0.0000####;-0.0000####");
- private Format decimalFormat2 = new DecimalFormat("0.0000####;-0.0000####");
- private Format decimalFormat6 = new DecimalFormat("0.0000####;-0.0000####");
+ private Format billionsFormat = new DecimalFormat("0.0000'B';-0.0000'B'");
+ private Format millionsFormat = new DecimalFormat("0.0000'M';-0.0000'M'");
+ private Format thousandFormat = new DecimalFormat("0.0000'K';-0.0000'K'");
+ private Format decimalFormat = new DecimalFormat("###,###,##0.0000####;-###,###,##0.0000####");
+
  private DateFormat dateFormat1 = new SimpleDateFormat("yyyy-MM-dd");
  private DateFormat dateFormat2 = new SimpleDateFormat("dd-MM-yyyy");
  private DateFormat dateFormat3 = new SimpleDateFormat("dd/MM/yyyy");
@@ -105,11 +107,17 @@ public StringBuffer format(Object value, StringBuffer buffer, FieldPosition posi
  return buffer;
  } else if (value instanceof Double) {
  final Double doubleValue = (Double)value;
- if (Double.isNaN(doubleValue)) buffer.append("NaN");
- else if (doubleValue < 0.001d) buffer.append(decimalFormat1.format(value));
- else if (doubleValue < 0d) buffer.append(decimalFormat6.format(value));
- else if (doubleValue > 1000000d) buffer.append(decimalFormat1.format(value));
- else buffer.append(decimalFormat2.format(value));
+ if (Double.isNaN(doubleValue)) {
+ buffer.append("NaN");
+ } else if (Math.abs(doubleValue) > 1000000000d) {
+ buffer.append(billionsFormat.format(doubleValue / 1000000000d));
+ } else if (Math.abs(doubleValue) > 1000000d) {
+ buffer.append(millionsFormat.format(doubleValue / 1000000d));
+ } else if (Math.abs(doubleValue) > 1000d) {
+ buffer.append(thousandFormat.format(doubleValue / 1000d));
+ } else {
+ buffer.append(decimalFormat.format(doubleValue));
+ }
  return buffer;
  } else if (value instanceof Boolean) {
  buffer.append(value.toString());