*
* <p>To format a Measure object, first create a formatter
* object using a MeasureFormat factory method. Then use that
- * object's format, formatMeasure, or formatMeasures methods.
+ * object's format or formatMeasures methods.
*
* Here is sample code:
* <pre>
*/
// Be sure to update the toFormatWidth and fromFormatWidth() functions
// when adding an enum value.
- public static enum FormatWidth {
+ public enum FormatWidth {
/**
* Spell out everything.
/**
* Able to format Collection<? extends Measure>, Measure[], and Measure
- * by delegating to formatMeasure or formatMeasures.
- * If the pos argument identifies a field used by the format
+ * by delegating to formatMeasures.
+ * If the pos argument identifies a NumberFormat field,
* then its indices are set to the beginning and end of the first such field
- * encountered.
+ * encountered. MeasureFormat itself does not supply any fields.
*
* @param obj must be a Collection<? extends Measure>, Measure[], or Measure object.
* @param toAppendTo Formatted string appended here.
public Measure parseObject(String source, ParsePosition pos) {
throw new UnsupportedOperationException();
}
-
-
- /**
- * Formats a single measure and adds to appendable.
- * If the fieldPosition argument identifies a field used by the format,
- * then its indices are set to the beginning and end of the first such
- * field encountered.
- *
- * @param measure the measure to format
- * @param appendable the formatted string appended here.
- * @param fieldPosition Identifies a field in the formatted text.
- * @return appendable.
- * @see MeasureFormat#formatMeasures(Measure...)
- * @draft ICU 53
- * @provisional
- */
- public <T extends Appendable> T formatMeasure(
- Measure measure, T appendable, FieldPosition fieldPosition) {
- Number n = measure.getNumber();
- MeasureUnit unit = measure.getUnit();
- UFieldPosition fpos = new UFieldPosition(fieldPosition.getFieldAttribute(), fieldPosition.getField());
- StringBuffer formattedNumber = numberFormat.format(n, new StringBuffer(), fpos);
- String keyword = rules.select(new PluralRules.FixedDecimal(n.doubleValue(), fpos.getCountVisibleFractionDigits(), fpos.getFractionDigits()));
-
- Map<FormatWidth, Map<String, PatternData>> styleToCountToFormat = unitToStyleToCountToFormat.get(unit);
- Map<String, PatternData> countToFormat = styleToCountToFormat.get(length);
- PatternData messagePatternData = countToFormat.get(keyword);
- try {
- appendable.append(messagePatternData.prefix);
- if (messagePatternData.suffix != null) { // there is a number (may not happen with, say, Arabic dual)
- // Fix field position
- if (fpos.getBeginIndex() != 0 || fpos.getEndIndex() != 0) {
- fieldPosition.setBeginIndex(fpos.getBeginIndex() + messagePatternData.prefix.length());
- fieldPosition.setEndIndex(fpos.getEndIndex() + messagePatternData.prefix.length());
- }
- appendable.append(formattedNumber);
- appendable.append(messagePatternData.suffix);
- }
- return appendable;
- } catch (IOException e) {
- throw new RuntimeException(e);
- }
- }
/**
* Format a sequence of measures. Uses the ListFormatter unit lists.
/**
* Formats a sequence of measures and adds to appendable.
- * If the fieldPosition argument identifies a field used by the format,
- * then its indices are set to the beginning and end of the first such
- * field encountered.
+ *
+ * If the fieldPosition argument identifies a NumberFormat field,
+ * then its indices are set to the beginning and end of the first such field
+ * encountered. MeasureFormat itself does not supply any fields.
*
* @param appendable the formatted string appended here.
* @param fieldPosition Identifies a field in the formatted text.
public <T extends Appendable> T formatMeasures(
T appendable, FieldPosition fieldPosition, Measure... measures) {
+ // fast track for trivial cases
+ if (measures.length == 0) {
+ return (T) appendable;
+ }
+ if (measures.length == 1) {
+ return formatMeasure(measures[0], appendable, fieldPosition);
+ }
+
// Zero out our field position so that we can tell when we find our field.
FieldPosition fpos = new FieldPosition(fieldPosition.getFieldAttribute(), fieldPosition.getField());
FieldPosition dummyPos = new FieldPosition(0);
return unitToStyleToCountToFormat;
}
+ private <T extends Appendable> T formatMeasure(
+ Measure measure, T appendable, FieldPosition fieldPosition) {
+ Number n = measure.getNumber();
+ MeasureUnit unit = measure.getUnit();
+ UFieldPosition fpos = new UFieldPosition(fieldPosition.getFieldAttribute(), fieldPosition.getField());
+ StringBuffer formattedNumber = numberFormat.format(n, new StringBuffer(), fpos);
+ String keyword = rules.select(new PluralRules.FixedDecimal(n.doubleValue(), fpos.getCountVisibleFractionDigits(), fpos.getFractionDigits()));
+
+ Map<FormatWidth, Map<String, PatternData>> styleToCountToFormat = unitToStyleToCountToFormat.get(unit);
+ Map<String, PatternData> countToFormat = styleToCountToFormat.get(length);
+ PatternData messagePatternData = countToFormat.get(keyword);
+ try {
+ appendable.append(messagePatternData.prefix);
+ if (messagePatternData.suffix != null) { // there is a number (may not happen with, say, Arabic dual)
+ // Fix field position
+ if (fpos.getBeginIndex() != 0 || fpos.getEndIndex() != 0) {
+ fieldPosition.setBeginIndex(fpos.getBeginIndex() + messagePatternData.prefix.length());
+ fieldPosition.setEndIndex(fpos.getEndIndex() + messagePatternData.prefix.length());
+ }
+ appendable.append(formattedNumber);
+ appendable.append(messagePatternData.suffix);
+ }
+ return appendable;
+ } catch (IOException e) {
+ throw new RuntimeException(e);
+ }
+ }
+
+ // Wrapper around NumberFormat that provides immutability and thread-safety.
+ private static final class ImmutableNumberFormat {
+ private NumberFormat nf;
+
+ public ImmutableNumberFormat(NumberFormat nf) {
+ this.nf = (NumberFormat) nf.clone();
+ }
+
+ public synchronized NumberFormat get() {
+ return (NumberFormat) nf.clone();
+ }
+
+ public synchronized StringBuffer format(
+ Number n, StringBuffer buffer, FieldPosition pos) {
+ return nf.format(n, buffer, pos);
+ }
+ }
+
static final class PatternData {
final String prefix;
final String suffix;
throw new IllegalStateException("Unable to serialize Format Width " + fw);
}
}
-
- // Wrapper around NumberFormat that provides immutability and thread-safety.
- private static final class ImmutableNumberFormat {
- private NumberFormat nf;
-
- public ImmutableNumberFormat(NumberFormat nf) {
- this.nf = (NumberFormat) nf.clone();
- }
-
- public synchronized NumberFormat get() {
- return (NumberFormat) nf.clone();
- }
-
- public synchronized StringBuffer format(
- Number n, StringBuffer buffer, FieldPosition pos) {
- return nf.format(n, buffer, pos);
- }
- }
}
projects / icu / commitdiff