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/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package tech.tablesaw.api;
import com.google.common.base.Preconditions;
import com.google.common.base.Strings;
import it.unimi.dsi.fastutil.ints.IntArrayList;
import it.unimi.dsi.fastutil.ints.IntArrays;
import it.unimi.dsi.fastutil.ints.IntComparator;
import it.unimi.dsi.fastutil.ints.IntIterator;
import it.unimi.dsi.fastutil.ints.IntOpenHashSet;
import it.unimi.dsi.fastutil.ints.IntSet;
import tech.tablesaw.columns.AbstractColumn;
import tech.tablesaw.columns.Column;
import tech.tablesaw.columns.IntColumnUtils;
import tech.tablesaw.columns.packeddata.PackedLocalDate;
import tech.tablesaw.columns.packeddata.PackedLocalDateTime;
import tech.tablesaw.filtering.IntBiPredicate;
import tech.tablesaw.filtering.IntPredicate;
import tech.tablesaw.filtering.LocalDatePredicate;
import tech.tablesaw.io.TypeUtils;
import tech.tablesaw.mapping.DateMapUtils;
import tech.tablesaw.store.ColumnMetadata;
import tech.tablesaw.util.BitmapBackedSelection;
import tech.tablesaw.util.ReverseIntComparator;
import tech.tablesaw.util.Selection;
import java.nio.ByteBuffer;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Set;
/**
* A column in a base table that contains float values
*/
public class DateColumn extends AbstractColumn implements DateMapUtils {
public static final int MISSING_VALUE = (Integer) ColumnType.LOCAL_DATE.getMissingValue();
private static final int DEFAULT_ARRAY_SIZE = 128;
private static final int BYTE_SIZE = 4;
private IntComparator reverseIntComparator = new IntComparator() {
@Override
public int compare(Integer o2, Integer o1) {
return (o1 < o2 ? -1 : (o1.equals(o2) ? 0 : 1));
}
@Override
public int compare(int o2, int o1) {
return (o1 < o2 ? -1 : (o1 == o2 ? 0 : 1));
}
};
private IntArrayList data;
IntComparator comparator = new IntComparator() {
@Override
public int compare(Integer r1, Integer r2) {
return compare((int) r1, (int) r2);
}
@Override
public int compare(int r1, int r2) {
int f1 = getIntInternal(r1);
int f2 = getIntInternal(r2);
return Integer.compare(f1, f2);
}
};
/**
* The formatter chosen to parse dates for this particular column
*/
private DateTimeFormatter selectedFormatter;
/** locale for formater */
private final Locale locale;
public DateColumn(String name) {
this(name, Locale.getDefault());
}
public DateColumn(String name, Locale locale) {
this(name, new IntArrayList(DEFAULT_ARRAY_SIZE), locale);
}
public DateColumn(String name, int initialSize) {
this(name, new IntArrayList(initialSize));
}
public DateColumn(String name, List data) {
this(name);
for (LocalDate date : data) {
append(date);
}
}
private DateColumn(String name, IntArrayList data) {
this(name, data, Locale.getDefault());
}
private DateColumn(String name, IntArrayList data, Locale locale) {
super(name);
this.data = data;
this.locale = locale;
}
public DateColumn(ColumnMetadata metadata) {
this(metadata, Locale.getDefault());
}
public DateColumn(ColumnMetadata metadata, Locale locale) {
super(metadata);
this.data = new IntArrayList(DEFAULT_ARRAY_SIZE);
this.locale = locale;
}
@Override
public int size() {
return data.size();
}
@Override
public ColumnType type() {
return ColumnType.LOCAL_DATE;
}
public void appendInternal(int f) {
data.add(f);
}
@Override
public IntArrayList data() {
return data;
}
public void set(int index, int value) {
data.set(index, value);
}
public void append(LocalDate f) {
appendInternal(PackedLocalDate.pack(f));
}
@Override
public String getString(int row) {
return PackedLocalDate.toDateString(getIntInternal(row));
}
@Override
public DateColumn emptyCopy() {
DateColumn column = new DateColumn(name());
column.setComment(comment());
return column;
}
@Override
public DateColumn emptyCopy(int rowSize) {
DateColumn column = new DateColumn(name(), rowSize);
column.setComment(comment());
return column;
}
@Override
public void clear() {
data.clear();
}
@Override
public DateColumn copy() {
DateColumn column = new DateColumn(name(), data);
column.setComment(comment());
return column;
}
@Override
public void sortAscending() {
Arrays.parallelSort(data.elements());
}
@Override
public void sortDescending() {
IntArrays.parallelQuickSort(data.elements(), reverseIntComparator);
}
@Override
public int countUnique() {
IntSet ints = new IntOpenHashSet(size());
for (int i = 0; i < size(); i++) {
ints.add(data.getInt(i));
}
return ints.size();
}
@Override
public DateColumn unique() {
IntSet ints = new IntOpenHashSet(data.size());
for (int i = 0; i < size(); i++) {
ints.add(data.getInt(i));
}
return new DateColumn(name() + " Unique values", IntArrayList.wrap(ints.toIntArray()));
}
public LocalDate firstElement() {
if (isEmpty()) {
return null;
}
return PackedLocalDate.asLocalDate(getIntInternal(0));
}
public LocalDate max() {
int max;
int missing = Integer.MIN_VALUE;
if (!isEmpty()) {
max = getIntInternal(0);
} else {
return null;
}
for (int aData : data) {
if (missing != aData) {
max = (max > aData) ? max : aData;
}
}
if (missing == max) {
return null;
}
return PackedLocalDate.asLocalDate(max);
}
public LocalDate min() {
int min;
int missing = Integer.MIN_VALUE;
if (!isEmpty()) {
min = getIntInternal(0);
} else {
return null;
}
for (int aData : data) {
if (missing != aData) {
min = (min < aData) ? min : aData;
}
}
if (Integer.MIN_VALUE == min) {
return null;
}
return PackedLocalDate.asLocalDate(min);
}
public CategoryColumn dayOfWeek() {
CategoryColumn newColumn = new CategoryColumn(this.name() + " day of week");
for (int r = 0; r < this.size(); r++) {
int c1 = this.getIntInternal(r);
if (c1 == DateColumn.MISSING_VALUE) {
newColumn.add(null);
} else {
newColumn.add(PackedLocalDate.getDayOfWeek(c1).toString());
}
}
return newColumn;
}
public ShortColumn dayOfWeekValue() {
ShortColumn newColumn = new ShortColumn(this.name() + " day of week", this.size());
for (int r = 0; r < this.size(); r++) {
int c1 = this.getIntInternal(r);
if (c1 == (DateColumn.MISSING_VALUE)) {
newColumn.set(r, ShortColumn.MISSING_VALUE);
} else {
newColumn.append((short) PackedLocalDate.getDayOfWeek(c1).getValue());
}
}
return newColumn;
}
public ShortColumn dayOfMonth() {
ShortColumn newColumn = new ShortColumn(this.name() + " day of month");
for (int r = 0; r < this.size(); r++) {
int c1 = this.getIntInternal(r);
if (c1 == DateColumn.MISSING_VALUE) {
newColumn.append(ShortColumn.MISSING_VALUE);
} else {
newColumn.append(PackedLocalDate.getDayOfMonth(c1));
}
}
return newColumn;
}
public ShortColumn dayOfYear() {
ShortColumn newColumn = new ShortColumn(this.name() + " day of year");
for (int r = 0; r < this.size(); r++) {
int c1 = this.getIntInternal(r);
if (c1 == DateColumn.MISSING_VALUE) {
newColumn.append(ShortColumn.MISSING_VALUE);
} else {
newColumn.append((short) PackedLocalDate.getDayOfYear(c1));
}
}
return newColumn;
}
public ShortColumn monthValue() {
ShortColumn newColumn = new ShortColumn(this.name() + " month");
for (int r = 0; r < this.size(); r++) {
int c1 = this.getIntInternal(r);
if (c1 == DateColumn.MISSING_VALUE) {
newColumn.append(ShortColumn.MISSING_VALUE);
} else {
newColumn.append(PackedLocalDate.getMonthValue(c1));
}
}
return newColumn;
}
public CategoryColumn month() {
CategoryColumn newColumn = new CategoryColumn(this.name() + " month");
for (int r = 0; r < this.size(); r++) {
int c1 = this.getIntInternal(r);
if (c1 == DateColumn.MISSING_VALUE) {
newColumn.add(CategoryColumn.MISSING_VALUE);
} else {
newColumn.add(PackedLocalDate.getMonth(c1).name());
}
}
return newColumn;
}
public ShortColumn year() {
ShortColumn newColumn = new ShortColumn(this.name() + " year");
for (int r = 0; r < this.size(); r++) {
int c1 = this.getIntInternal(r);
if (c1 == MISSING_VALUE) {
newColumn.append(ShortColumn.MISSING_VALUE);
} else {
newColumn.append(PackedLocalDate.getYear(c1));
}
}
return newColumn;
}
public LocalDate get(int index) {
return PackedLocalDate.asLocalDate(getIntInternal(index));
}
@Override
public boolean isEmpty() {
return data.isEmpty();
}
@Override
public IntComparator rowComparator() {
return comparator;
}
/**
* Returns a PackedDate as converted from the given string
*
* @param value A string representation of a date
* @throws DateTimeParseException if no parser can be found for the date format
*/
public int convert(String value) {
if (Strings.isNullOrEmpty(value) || TypeUtils.MISSING_INDICATORS.contains(value) || value.equals("-1")) {
return (Integer) ColumnType.LOCAL_DATE.getMissingValue();
}
String paddedValue = Strings.padStart(value, 4, '0');
if (selectedFormatter == null) {
selectedFormatter = TypeUtils.getDateFormatter(paddedValue).withLocale(locale);
}
LocalDate date;
try {
date = LocalDate.parse(paddedValue, selectedFormatter);
} catch (DateTimeParseException e) {
selectedFormatter = TypeUtils.DATE_FORMATTER.withLocale(locale);
date = LocalDate.parse(paddedValue, selectedFormatter);
}
return PackedLocalDate.pack(date);
}
@Override
public void appendCell(String string) {
Preconditions.checkNotNull(string);
appendInternal(convert(string));
}
@Override
public int getIntInternal(int index) {
return data.getInt(index);
}
public Selection isEqualTo(LocalDate value) {
int packed = PackedLocalDate.pack(value);
return select(IntColumnUtils.isEqualTo, packed);
}
/**
* Returns a bitmap flagging the records for which the value in this column is equal to the value in the given
* column
* Columnwise isEqualTo.
*/
public Selection isEqualTo(DateColumn column) {
Selection results = new BitmapBackedSelection();
int i = 0;
IntIterator intIterator = column.intIterator();
for (int next : data) {
if (next == intIterator.nextInt()) {
results.add(i);
}
i++;
}
return results;
}
/**
* Returns a table of dates and the number of observations of those dates
*
* @return the summary table
*/
@Override
public Table summary() {
Table table = Table.create("Column: " + name());
CategoryColumn measure = new CategoryColumn("Measure");
CategoryColumn value = new CategoryColumn("Value");
table.addColumn(measure);
table.addColumn(value);
measure.add("Count");
value.add(String.valueOf(size()));
measure.add("Missing");
value.add(String.valueOf(countMissing()));
measure.add("Earliest");
value.add(String.valueOf(min()));
measure.add("Latest");
value.add(String.valueOf(max()));
return table;
}
public Selection isAfter(int value) {
return select(PackedLocalDate::isAfter, value);
}
public Selection isAfter(LocalDate value) {
int packed = PackedLocalDate.pack(value);
return select(PackedLocalDate::isAfter, packed);
}
public Selection isBefore(int value) {
return select(PackedLocalDate::isBefore, value);
}
public Selection isBefore(LocalDate value) {
int packed = PackedLocalDate.pack(value);
return select(PackedLocalDate::isBefore, packed);
}
public Selection isOnOrBefore(LocalDate value) {
int packed = PackedLocalDate.pack(value);
return select(PackedLocalDate::isOnOrBefore, packed);
}
public Selection isOnOrBefore(int value) {
return select(PackedLocalDate::isOnOrBefore, value);
}
public Selection isOnOrAfter(LocalDate value) {
int packed = PackedLocalDate.pack(value);
return select(PackedLocalDate::isOnOrAfter, packed);
}
public Selection isOnOrAfter(int value) {
return select(PackedLocalDate::isOnOrAfter, value);
}
public Selection isMonday() {
return select(PackedLocalDate::isMonday);
}
public Selection isTuesday() {
return select(PackedLocalDate::isTuesday);
}
public Selection isWednesday() {
return select(PackedLocalDate::isWednesday);
}
public Selection isThursday() {
return select(PackedLocalDate::isThursday);
}
public Selection isFriday() {
return select(PackedLocalDate::isFriday);
}
public Selection isSaturday() {
return select(PackedLocalDate::isSaturday);
}
public Selection isSunday() {
return select(PackedLocalDate::isSunday);
}
public Selection isInJanuary() {
return select(PackedLocalDate::isInJanuary);
}
public Selection isInFebruary() {
return select(PackedLocalDate::isInFebruary);
}
public Selection isInMarch() {
return select(PackedLocalDate::isInMarch);
}
public Selection isInApril() {
return select(PackedLocalDate::isInApril);
}
public Selection isInMay() {
return select(PackedLocalDate::isInMay);
}
public Selection isInJune() {
return select(PackedLocalDate::isInJune);
}
public Selection isInJuly() {
return select(PackedLocalDate::isInJuly);
}
public Selection isInAugust() {
return select(PackedLocalDate::isInAugust);
}
public Selection isInSeptember() {
return select(PackedLocalDate::isInSeptember);
}
public Selection isInOctober() {
return select(PackedLocalDate::isInOctober);
}
public Selection isInNovember() {
return select(PackedLocalDate::isInNovember);
}
public Selection isInDecember() {
return select(PackedLocalDate::isInDecember);
}
public Selection isFirstDayOfMonth() {
return select(PackedLocalDate::isFirstDayOfMonth);
}
public Selection isLastDayOfMonth() {
return select(PackedLocalDate::isLastDayOfMonth);
}
public Selection isInQ1() {
return select(PackedLocalDate::isInQ1);
}
public Selection isInQ2() {
return select(PackedLocalDate::isInQ2);
}
public Selection isInQ3() {
return select(PackedLocalDate::isInQ3);
}
public Selection isInQ4() {
return select(PackedLocalDate::isInQ4);
}
public Selection isInYear(int year) {
return select(PackedLocalDate::isInYear, year);
}
@Override
public String print() {
StringBuilder builder = new StringBuilder();
builder.append(title());
for (int next : data) {
builder.append(String.valueOf(PackedLocalDate.asLocalDate(next)));
builder.append('\n');
}
return builder.toString();
}
@Override
public Selection isMissing() {
return select(isMissing);
}
/**
* Returns the count of missing values in this column
*/
@Override
public int countMissing() {
int count = 0;
for (int i = 0; i < size(); i++) {
if (getIntInternal(i) == MISSING_VALUE) {
count++;
}
}
return count;
}
@Override
public Selection isNotMissing() {
return select(isNotMissing);
}
@Override
public String toString() {
return "LocalDate column: " + name();
}
@Override
public void append(Column column) {
Preconditions.checkArgument(column.type() == this.type());
DateColumn intColumn = (DateColumn) column;
for (int i = 0; i < intColumn.size(); i++) {
appendInternal(intColumn.getIntInternal(i));
}
}
public DateColumn selectIf(LocalDatePredicate predicate) {
DateColumn column = emptyCopy();
IntIterator iterator = intIterator();
while (iterator.hasNext()) {
int next = iterator.nextInt();
if (predicate.test(PackedLocalDate.asLocalDate(next))) {
column.appendInternal(next);
}
}
return column;
}
/**
* This version operates on predicates that treat the given IntPredicate as operating on a packed local time
* This is much more efficient that using a LocalTimePredicate, but requires that the developer understand the
* semantics of packedLocalTimes
*/
public DateColumn selectIf(IntPredicate predicate) {
DateColumn column = emptyCopy();
IntIterator iterator = intIterator();
while (iterator.hasNext()) {
int next = iterator.nextInt();
if (predicate.test(next)) {
column.appendInternal(next);
}
}
return column;
}
/**
* Returns the largest ("top") n values in the column
*
* @param n The maximum number of records to return. The actual number will be smaller if n is greater than the
* number of observations in the column
* @return A list, possibly empty, of the largest observations
*/
public List top(int n) {
List top = new ArrayList<>();
int[] values = data.toIntArray();
IntArrays.parallelQuickSort(values, ReverseIntComparator.instance());
for (int i = 0; i < n && i < values.length; i++) {
top.add(PackedLocalDate.asLocalDate(values[i]));
}
return top;
}
/**
* Returns the smallest ("bottom") n values in the column
*
* @param n The maximum number of records to return. The actual number will be smaller if n is greater than the
* number of observations in the column
* @return A list, possibly empty, of the smallest n observations
*/
public List bottom(int n) {
List bottom = new ArrayList<>();
int[] values = data.toIntArray();
IntArrays.parallelQuickSort(values);
for (int i = 0; i < n && i < values.length; i++) {
bottom.add(PackedLocalDate.asLocalDate(values[i]));
}
return bottom;
}
public IntIterator intIterator() {
return data.iterator();
}
public Selection select(IntPredicate predicate) {
Selection selection = new BitmapBackedSelection();
for (int idx = 0; idx < data.size(); idx++) {
int next = data.getInt(idx);
if (predicate.test(next)) {
selection.add(idx);
}
}
return selection;
}
public Selection select(IntBiPredicate predicate, int value) {
Selection selection = new BitmapBackedSelection();
for (int idx = 0; idx < data.size(); idx++) {
int next = data.getInt(idx);
if (predicate.test(next, value)) {
selection.add(idx);
}
}
return selection;
}
public Set asSet() {
Set dates = new HashSet<>();
DateColumn unique = unique();
for (LocalDate d : unique) {
dates.add(d);
}
return dates;
}
// TODO(lwhite): Is this duplicating the functionality of at()?
public DateTimeColumn with(TimeColumn timeColumn) {
String dateTimeColumnName = name() + " : " + timeColumn.name();
DateTimeColumn dateTimeColumn = new DateTimeColumn(dateTimeColumnName, size());
for (int row = 0; row < size(); row++) {
int date = getIntInternal(row);
int time = timeColumn.getIntInternal(row);
long packedLocalDateTime = PackedLocalDateTime.create(date, time);
dateTimeColumn.appendInternal(packedLocalDateTime);
}
return dateTimeColumn;
}
public boolean contains(LocalDate localDate) {
int date = PackedLocalDate.pack(localDate);
return data().contains(date);
}
@Override
public int byteSize() {
return BYTE_SIZE;
}
/**
* Returns the contents of the cell at rowNumber as a byte[]
* @param rowNumber the number of the row as int
*/
@Override
public byte[] asBytes(int rowNumber) {
return ByteBuffer.allocate(4).putInt(getIntInternal(rowNumber)).array();
}
/**
* Returns an iterator over elements of type {@code T}.
*
* @return an Iterator.
*/
@Override
public Iterator iterator() {
return new Iterator() {
IntIterator intIterator = intIterator();
@Override
public boolean hasNext() {
return intIterator.hasNext();
}
@Override
public LocalDate next() {
return PackedLocalDate.asLocalDate(intIterator.nextInt());
}
};
}
@Override
public DateColumn difference() {
throw new UnsupportedOperationException("DateTimeColumn.difference() currently not supported");
/*
DateColumn returnValue = new DateColumn(this.name(), data.size());
returnValue.add(DateColumn.MISSING_VALUE);
for (int current = 1; current > data.size(); current++) {
LocalDate currentValue = get(current);
LocalDate nextValue = get(current+1);
Duration duration = Duration.between(currentValue, nextValue);
LocalDateTime date =
LocalDateTime.ofInstant(Instant.ofEpochMilli(duration.toMillis()), ZoneId.systemDefault());
returnValue.add(date.toLocalDate());
}
return returnValue;
*/
}
}
