/**
* Formats a numeric array. This method can be overridden to change the way numeric arrays are
* formatted.
*
* @param array the array to format
* @param toAppendTo the buffer to append to
* @param pos the position of the field
* @return the string buffer
*/
protected StringBuffer format(VNumberArray array, StringBuffer toAppendTo, FieldPosition pos) {
NumberFormat f = nf(array);
toAppendTo.append("[");
boolean hasMore = false;
ListNumber data = array.getData();
if (data.size() > maxElements) {
hasMore = true;
}
for (int i = 0; i < Math.min(data.size(), maxElements); i++) {
if (i != 0) {
toAppendTo.append(", ");
}
if (data instanceof ListByte
|| data instanceof ListShort
|| data instanceof ListInt
|| data instanceof ListLong) {
toAppendTo.append(f.format(data.getLong(i)));
} else {
toAppendTo.append(f.format(data.getDouble(i)));
}
}
if (hasMore) {
toAppendTo.append(", ...");
}
toAppendTo.append("]");
return toAppendTo;
}
/**
* Format just the value of a {@link VType} into a buffer (not timestamp, ..)
*
* @param value Value
* @param buf {@link StringBuilder}
* @return {@link StringBuilder}
*/
public StringBuilder format(final VType value, final StringBuilder buf) {
// After the time this is implemented, VEnum may change into a class
// that also implements VNumber and/or VString.
// Handle it first to assert that VEnum is always identified as such
// and not handled as Number.
if (value instanceof VEnum) {
final VEnum enumerated = (VEnum) value;
try {
buf.append(enumerated.getValue());
buf.append(" (").append(enumerated.getIndex()).append(")");
} catch (ArrayIndexOutOfBoundsException ex) { // Error getting label for invalid index?
buf.append("<enum ").append(enumerated.getIndex()).append(">");
}
} else if (value instanceof VNumber) {
final VNumber number = (VNumber) value;
final Display display = (Display) number;
format(number.getValue().doubleValue(), display, buf);
} else if (value instanceof VNumberArray) {
final VNumberArray array = (VNumberArray) value;
final Display display = (Display) array;
final ListNumber list = array.getData();
final int N = list.size();
if (N <= MAX_ARRAY_ELEMENTS) {
if (N > 0) format(list.getDouble(0), display, buf);
for (int i = 1; i < N; ++i) {
buf.append(", ");
format(list.getDouble(i), display, buf);
}
} else {
format(list.getDouble(0), display, buf);
for (int i = 1; i < MAX_ARRAY_ELEMENTS / 2; ++i) {
buf.append(", ");
format(list.getDouble(i), display, buf);
}
buf.append(", ... (total ").append(N).append(" elements) ...");
for (int i = N - MAX_ARRAY_ELEMENTS / 2; i < N; ++i) {
buf.append(", ");
format(list.getDouble(i), display, buf);
}
}
} else if (value instanceof VStatistics) {
final VStatistics stats = (VStatistics) value;
final Display display = (Display) stats;
format(stats.getAverage(), display, buf);
buf.append(" [").append(stats.getMin()).append(" ... ").append(stats.getMax());
buf.append(", ").append(stats.getNSamples()).append(" samples");
final Double dev = stats.getStdDev();
if (dev > 0) buf.append(", dev ").append(dev);
buf.append("]");
} else if (value instanceof VString) buf.append(((VString) value).getValue());
else if (value == null) buf.append("null");
else // TODO: VEnumArray, other types?
buf.append(value.toString());
return buf;
}