@js-joda/core
Version:
a date and time library for javascript
368 lines (340 loc) • 13.3 kB
JavaScript
/**
* @copyright (c) 2016, Philipp Thürwächter & Pattrick Hüper
* @copyright (c) 2007-present, Stephen Colebourne & Michael Nascimento Santos
* @license BSD-3-Clause (see LICENSE in the root directory of this source tree)
*/
import { assert } from '../../assert';
import { ArithmeticException, DateTimeException, IllegalArgumentException } from '../../errors';
import { MathUtil } from '../../MathUtil';
import { IsoChronology } from '../../chrono/IsoChronology';
import { SignStyle } from '../SignStyle';
const MAX_WIDTH = 15; // can't parse all numbers with more then 15 digits in javascript
const EXCEED_POINTS = [
0,
10,
100,
1000,
10000,
100000,
1000000,
10000000,
100000000,
1000000000
];
/**
* @private
*/
export class NumberPrinterParser {
/**
* Constructor.
*
* @param field the field to print, not null
* @param minWidth the minimum field width, from 1 to 19
* @param maxWidth the maximum field width, from minWidth to 19
* @param signStyle the positive/negative sign style, not null
* @param subsequentWidth the width of subsequent non-negative numbers, 0 or greater,
* -1 if fixed width due to active adjacent parsing
*/
constructor(field, minWidth, maxWidth, signStyle, subsequentWidth=0){
this._field = field;
this._minWidth = minWidth;
this._maxWidth = maxWidth;
this._signStyle = signStyle;
this._subsequentWidth = subsequentWidth;
}
field(){ return this._field;}
minWidth(){ return this._minWidth;}
maxWidth(){ return this._maxWidth;}
signStyle(){ return this._signStyle;}
withFixedWidth() {
if (this._subsequentWidth === -1) {
return this;
}
return new NumberPrinterParser(this._field, this._minWidth, this._maxWidth, this._signStyle, -1);
}
withSubsequentWidth(subsequentWidth) {
return new NumberPrinterParser(this._field, this._minWidth, this._maxWidth, this._signStyle, this._subsequentWidth + subsequentWidth);
}
_isFixedWidth() {
return this._subsequentWidth === -1 ||
(this._subsequentWidth > 0 && this._minWidth === this._maxWidth && this._signStyle === SignStyle.NOT_NEGATIVE);
}
print(context, buf) {
const contextValue = context.getValue(this._field);
if (contextValue == null) {
return false;
}
const value = this._getValue(context, contextValue);
const symbols = context.symbols();
let str = `${Math.abs(value)}`;
if (str.length > this._maxWidth) {
throw new DateTimeException(`Field ${this._field
} cannot be printed as the value ${value
} exceeds the maximum print width of ${this._maxWidth}`);
}
str = symbols.convertNumberToI18N(str);
if (value >= 0) {
switch (this._signStyle) {
case SignStyle.EXCEEDS_PAD:
if (this._minWidth < MAX_WIDTH && value >= EXCEED_POINTS[this._minWidth]) {
buf.append(symbols.positiveSign());
}
break;
case SignStyle.ALWAYS:
buf.append(symbols.positiveSign());
break;
}
} else {
switch (this._signStyle) {
case SignStyle.NORMAL:
case SignStyle.EXCEEDS_PAD:
case SignStyle.ALWAYS:
buf.append(symbols.negativeSign());
break;
case SignStyle.NOT_NEGATIVE:
throw new DateTimeException(`Field ${this._field
} cannot be printed as the value ${value
} cannot be negative according to the SignStyle`);
}
}
for (let i = 0; i < this._minWidth - str.length; i++) {
buf.append(symbols.zeroDigit());
}
buf.append(str);
return true;
}
parse(context, text, position){
const length = text.length;
if (position === length) {
return ~position;
}
assert(position>=0 && position<length);
const sign = text.charAt(position); // IOOBE if invalid position
let negative = false;
let positive = false;
if (sign === context.symbols().positiveSign()) {
if (this._signStyle.parse(true, context.isStrict(), this._minWidth === this._maxWidth) === false) {
return ~position;
}
positive = true;
position++;
} else if (sign === context.symbols().negativeSign()) {
if (this._signStyle.parse(false, context.isStrict(), this._minWidth === this._maxWidth) === false) {
return ~position;
}
negative = true;
position++;
} else {
if (this._signStyle === SignStyle.ALWAYS && context.isStrict()) {
return ~position;
}
}
const effMinWidth = (context.isStrict() || this._isFixedWidth() ? this._minWidth : 1);
const minEndPos = position + effMinWidth;
if (minEndPos > length) {
return ~position;
}
let effMaxWidth = (context.isStrict() || this._isFixedWidth() ? this._maxWidth : 9) + Math.max(this._subsequentWidth, 0);
let total = 0;
let pos = position;
for (let pass = 0; pass < 2; pass++) {
const maxEndPos = Math.min(pos + effMaxWidth, length);
while (pos < maxEndPos) {
const ch = text.charAt(pos++);
const digit = context.symbols().convertToDigit(ch);
if (digit < 0) {
pos--;
if (pos < minEndPos) {
return ~position; // need at least min width digits
}
break;
}
if ((pos - position) > MAX_WIDTH) {
throw new ArithmeticException('number text exceeds length');
} else {
total = total * 10 + digit;
}
}
if (this._subsequentWidth > 0 && pass === 0) {
// re-parse now we know the correct width
const parseLen = pos - position;
effMaxWidth = Math.max(effMinWidth, parseLen - this._subsequentWidth);
pos = position;
total = 0;
} else {
break;
}
}
if (negative) {
if (total === 0 && context.isStrict()) {
return ~(position - 1); // minus zero not allowed
}
if(total !== 0) {
total = -total;
}
} else if (this._signStyle === SignStyle.EXCEEDS_PAD && context.isStrict()) {
const parseLen = pos - position;
if (positive) {
if (parseLen <= this._minWidth) {
return ~(position - 1); // '+' only parsed if minWidth exceeded
}
} else {
if (parseLen > this._minWidth) {
return ~position; // '+' must be parsed if minWidth exceeded
}
}
}
return this._setValue(context, total, position, pos);
}
/**
* Gets the value to output.
* (This is needed to allow e.g. ReducedPrinterParser to override this and change the value!
*
* @param context the context
* @param value the value of the field, not null
* @return the value
* @private
*/
_getValue(context, value) {
return value;
}
/**
* Stores the value.
*
* @param context the context to store into, not null
* @param value the value
* @param errorPos the position of the field being parsed
* @param successPos the position after the field being parsed
* @return the new position
*/
_setValue(context, value, errorPos, successPos) {
return context.setParsedField(this._field, value, errorPos, successPos);
}
toString() {
if (this._minWidth === 1 && this._maxWidth === MAX_WIDTH && this._signStyle === SignStyle.NORMAL) {
return `Value(${this._field})`;
}
if (this._minWidth === this._maxWidth && this._signStyle === SignStyle.NOT_NEGATIVE) {
return `Value(${this._field},${this._minWidth})`;
}
return `Value(${this._field},${this._minWidth},${this._maxWidth},${this._signStyle})`;
}
}
//-----------------------------------------------------------------------
/**
* Prints and parses a reduced numeric date-time field.
* @private
*/
export class ReducedPrinterParser extends NumberPrinterParser {
/**
* Constructor.
*
* @param {TemporalField} field the field to print, validated not null
* @param {number} width the field width, from 1 to 10
* @param {number} maxWidth the field max width, from 1 to 10
* @param {number} baseValue the base value
* @param {ChronoLocalDate} baseDate the base date
*/
constructor(field, width, maxWidth, baseValue, baseDate) {
super(field, width, maxWidth, SignStyle.NOT_NEGATIVE);
if (width < 1 || width > 10) {
throw new IllegalArgumentException(`The width must be from 1 to 10 inclusive but was ${width}`);
}
if (maxWidth < 1 || maxWidth > 10) {
throw new IllegalArgumentException(`The maxWidth must be from 1 to 10 inclusive but was ${maxWidth}`);
}
if (maxWidth < width) {
throw new IllegalArgumentException('The maxWidth must be greater than the width');
}
if (baseDate === null) {
if (field.range().isValidValue(baseValue) === false) {
throw new IllegalArgumentException('The base value must be within the range of the field');
}
if ((baseValue + EXCEED_POINTS[width]) > MathUtil.MAX_SAFE_INTEGER) {
throw new DateTimeException('Unable to add printer-parser as the range exceeds the capacity of an int');
}
}
this._baseValue = baseValue;
this._baseDate = baseDate;
}
/**
*
* @param {DateTimePrintContext} context
* @param {number} value
*/
_getValue(context, value) {
const absValue = Math.abs(value);
let baseValue = this._baseValue;
if (this._baseDate !== null) {
// TODO: in threetenbp the following line is used, but we dont have Chronology yet,
// let chrono = Chronology.from(context.getTemporal());
// so let's use IsoChronology for now
context.temporal();
const chrono = IsoChronology.INSTANCE;
baseValue = chrono.date(this._baseDate).get(this._field);
}
if (value >= baseValue && value < baseValue + EXCEED_POINTS[this._minWidth]) {
return absValue % EXCEED_POINTS[this._minWidth];
}
return absValue % EXCEED_POINTS[this._maxWidth];
}
/**
*
* @param {DateTimeParseContext} context
* @param {number} value
* @param {number} errorPos
* @param {number} successPos
*/
_setValue(context, value, errorPos, successPos) {
let baseValue = this._baseValue;
if (this._baseDate != null) {
const chrono = context.getEffectiveChronology();
baseValue = chrono.date(this._baseDate).get(this._field);
// TODO: not implemented??
// context.addChronologyChangedParser(this, value, errorPos, successPos);
}
const parseLen = successPos - errorPos;
if (parseLen === this._minWidth && value >= 0) {
const range = EXCEED_POINTS[this._minWidth];
const lastPart = baseValue % range;
const basePart = baseValue - lastPart;
if (baseValue > 0) {
value = basePart + value;
} else {
value = basePart - value;
}
if (value < baseValue) {
value += range;
}
}
return context.setParsedField(this._field, value, errorPos, successPos);
}
withFixedWidth() {
if (this._subsequentWidth === -1) {
return this;
}
return new ReducedPrinterParser(this._field, this._minWidth, this._maxWidth, this._baseValue, this._baseDate, -1);
}
/**
*
* @param {number} subsequentWidth
* @returns {ReducedPrinterParser}
*/
withSubsequentWidth(subsequentWidth) {
return new ReducedPrinterParser(this._field, this._minWidth, this._maxWidth, this._baseValue, this._baseDate,
this._subsequentWidth + subsequentWidth);
}
/**
*
* @param {DateTimeParseContext} context
*/
isFixedWidth(context) {
if (context.isStrict() === false) {
return false;
}
return super.isFixedWidth(context);
}
toString() {
return `ReducedValue(${this._field},${this._minWidth},${this._maxWidth},${this._baseDate != null ? this._baseDate : this._baseValue})`;
}
}