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com.squarespace.cldrengine.calendars.DateSkeletonParser Maven / Gradle / Ivy
package com.squarespace.cldrengine.calendars;
import java.util.List;
import com.squarespace.cldrengine.calendars.DateSkeleton.SkeletonField;
import com.squarespace.cldrengine.calendars.SkeletonData.Field;
import com.squarespace.cldrengine.calendars.SkeletonData.FieldType;
import com.squarespace.cldrengine.parsing.DateTimePattern;
import com.squarespace.cldrengine.parsing.DateTimePattern.DateTimeNode;
import lombok.AllArgsConstructor;
@AllArgsConstructor
class DateSkeletonParser {
private final List preferredFlex;
private final List allowedFlex;
public DateSkeleton parse(String skeleton, boolean isPattern) {
DateSkeleton s = new DateSkeleton();
this._parse(s, skeleton, isPattern);
return s;
}
private void _parse(DateSkeleton s, String raw, boolean isPattern) {
int len = raw.length();
boolean noDayPeriod = false;
char field = '\0';
int width = 0;
boolean inquote = false;
int i = 0;
while (i < len) {
char ch = raw.charAt(i);
if (inquote) {
if (ch == '\'') {
inquote = false;
}
i++;
continue;
}
if (ch == '\'') {
inquote = true;
} else if (DateTimePattern.DATE_PATTERN_CHARS.contains(ch)) {
if (ch != field) {
if (field != '\0') {
noDayPeriod = this.setDayPeriod(s, field, width, noDayPeriod);
}
field = ch;
width = 1;
} else {
width++;
}
}
// Lenient parse.. skip all non-field characters.
i++;
}
// Push the last field
if (width > 0 && field != '\0') {
noDayPeriod = this.setDayPeriod(s, field, width, noDayPeriod);
}
// Handle some special hour cycle / day period behaviors
SkeletonField hour = s.info[Field.HOUR.ordinal()];
SkeletonField dayPeriod = s.info[Field.DAYPERIOD.ordinal()];
if (noDayPeriod) {
this.clear(s, Field.DAYPERIOD);
} else if (hour != null) {
// If we have a 12-hour-cycle but no dayperiod, add the default.
if (hour.field == 'h' || hour.field == 'K') {
if (dayPeriod == null) {
// Add the default day period
FieldType row = SkeletonData.FIELD_INDEX.get('a').get(0);
s.type[Field.DAYPERIOD.ordinal()] = row.subfield;
s.info[Field.DAYPERIOD.ordinal()] = new SkeletonField('a', 'a', row.repeat, row.repeat);
}
} else if (dayPeriod != null) {
this.clear(s, Field.DAYPERIOD);
}
}
s.skeleton = isPattern ? s.canonical() : raw;
if (isPattern) {
s.pattern = raw;
}
}
private boolean setDayPeriod(DateSkeleton s, char field, int width, boolean noDayPeriod) {
if ("jJC".indexOf(field) != -1) {
noDayPeriod = field == 'J';
this.setMeta(s, field);
} else {
this.set(s, field, field, width);
}
return noDayPeriod;
}
private void setMeta(DateSkeleton s, char field) {
List meta = field == 'C' ? this.allowedFlex : this.preferredFlex;
for (Object n : meta) {
if (!(n instanceof String)) {
DateTimeNode node = (DateTimeNode)n;
this.set(s, field, node.field, node.width);
}
}
}
private void set(DateSkeleton s, char input, char field, int width) {
FieldType type = SkeletonData.getFieldType(field, width);
if (type != null) {
this.index(s, input, field, width, type);
}
}
private void clear(DateSkeleton s, Field field) {
s.type[field.ordinal()] = 0;
s.info[field.ordinal()] = null;
}
private void index(DateSkeleton s, char input, char field, int width, FieldType ft) {
int idx = ft.field.ordinal();
s.type[idx] = ft.subfield + (ft.subfield > 0 ? width : 0);
s.info[idx] = new SkeletonField(input, field, width, ft.repeat);
s.isDate = s.isDate || idx < Field.DAYPERIOD.ordinal();
s.isTime = s.isTime || idx >= Field.DAYPERIOD.ordinal();
}
}
