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High-performance Java Dataframe with integrated columnar storage (fork of tablesaw)
package org.datavec.dataframe.table;
import it.unimi.dsi.fastutil.ints.IntArrayList;
import net.jcip.annotations.Immutable;
import org.datavec.dataframe.api.*;
import org.datavec.dataframe.util.Selection;
/**
* A static utility class for row operations
*/
@Immutable
public class Rows {
// Don't instantiate
private Rows() {}
/**
* Copy the given rows to a table
* @param rows
* @param oldTable
* @param newTable
*/
public static void copyRowsToTable(IntArrayList rows, Table oldTable, Table newTable) {
for (int columnIndex = 0; columnIndex < oldTable.columnCount(); columnIndex++) {
ColumnType columnType = oldTable.column(columnIndex).type();
switch (columnType) {
case FLOAT:
copy(rows, (FloatColumn) oldTable.column(columnIndex), (FloatColumn) newTable.column(columnIndex));
break;
case INTEGER:
copy(rows, (IntColumn) oldTable.column(columnIndex), (IntColumn) newTable.column(columnIndex));
break;
case SHORT_INT:
copy(rows, (ShortColumn) oldTable.column(columnIndex), (ShortColumn) newTable.column(columnIndex));
break;
case LONG_INT:
copy(rows, (LongColumn) oldTable.column(columnIndex), (LongColumn) newTable.column(columnIndex));
break;
case CATEGORY:
copy(rows, (CategoryColumn) oldTable.column(columnIndex),
(CategoryColumn) newTable.column(columnIndex));
break;
case BOOLEAN:
copy(rows, (BooleanColumn) oldTable.column(columnIndex),
(BooleanColumn) newTable.column(columnIndex));
break;
case LOCAL_DATE:
copy(rows, (DateColumn) oldTable.column(columnIndex), (DateColumn) newTable.column(columnIndex));
break;
case LOCAL_DATE_TIME:
copy(rows, (DateTimeColumn) oldTable.column(columnIndex),
(DateTimeColumn) newTable.column(columnIndex));
break;
case LOCAL_TIME:
copy(rows, (TimeColumn) oldTable.column(columnIndex), (TimeColumn) newTable.column(columnIndex));
break;
default:
throw new RuntimeException("Unhandled column type in case statement");
}
}
}
public static void appendRowToTable(int row, Table oldTable, Table newTable) {
IntArrayList rows = new IntArrayList();
rows.add(row);
copyRowsToTable(rows, oldTable, newTable);
}
public static boolean compareRows(int rowInOriginal, Table original, Table tempTable) {
boolean result;
for (int columnIndex = 0; columnIndex < original.columnCount(); columnIndex++) {
ColumnType columnType = original.column(columnIndex).type();
switch (columnType) {
case FLOAT:
result = compare(rowInOriginal, (FloatColumn) tempTable.column(columnIndex),
(FloatColumn) original.column(columnIndex));
if (!result)
return false;
break;
case INTEGER:
result = compare(rowInOriginal, (IntColumn) tempTable.column(columnIndex),
(IntColumn) original.column(columnIndex));
if (!result)
return false;
break;
case SHORT_INT:
result = compare(rowInOriginal, (ShortColumn) tempTable.column(columnIndex),
(ShortColumn) original.column(columnIndex));
if (!result)
return false;
break;
case LONG_INT:
result = compare(rowInOriginal, (LongColumn) tempTable.column(columnIndex),
(LongColumn) original.column(columnIndex));
if (!result)
return false;
break;
case CATEGORY:
result = compare(rowInOriginal, (CategoryColumn) tempTable.column(columnIndex),
(CategoryColumn) original.column(columnIndex));
if (!result)
return false;
break;
case BOOLEAN:
result = compare(rowInOriginal, (BooleanColumn) tempTable.column(columnIndex),
(BooleanColumn) original.column(columnIndex));
if (!result)
return false;
break;
case LOCAL_DATE:
result = compare(rowInOriginal, (DateColumn) tempTable.column(columnIndex),
(DateColumn) original.column(columnIndex));
if (!result)
return false;
break;
case LOCAL_DATE_TIME:
result = compare(rowInOriginal, (DateTimeColumn) tempTable.column(columnIndex),
(DateTimeColumn) original.column(columnIndex));
if (!result)
return false;
break;
case LOCAL_TIME:
result = compare(rowInOriginal, (TimeColumn) tempTable.column(columnIndex),
(TimeColumn) original.column(columnIndex));
if (!result)
return false;
break;
default:
throw new RuntimeException("Unhandled column type in case statement");
}
}
return true;
}
public static void copyRowsToTable(Selection rows, Table oldTable, Table newTable) {
int[] r = rows.toArray();
IntArrayList rowArray = new IntArrayList(r);
copyRowsToTable(rowArray, oldTable, newTable);
}
public static void head(int rowCount, Table oldTable, Table newTable) {
IntArrayList rows = new IntArrayList(rowCount);
for (int i = 0; i < rowCount; i++) {
rows.add(i);
}
copyRowsToTable(rows, oldTable, newTable);
}
public static void tail(int rowsToInclude, Table oldTable, Table newTable) {
int oldTableSize = oldTable.rowCount();
int start = oldTableSize - rowsToInclude;
IntArrayList rows = new IntArrayList(rowsToInclude);
for (int i = start; i < oldTableSize; i++) {
rows.add(i);
}
copyRowsToTable(rows, oldTable, newTable);
}
private static void copy(IntArrayList rows, FloatColumn oldColumn, FloatColumn newColumn) {
for (int index : rows) {
newColumn.add(oldColumn.get(index));
}
}
private static boolean compare(int row, FloatColumn tempTable, FloatColumn original) {
return original.get(row) == tempTable.get(tempTable.size() - 1);
}
private static void copy(IntArrayList rows, CategoryColumn oldColumn, CategoryColumn newColumn) {
newColumn.initializeWith(oldColumn.getValues(rows), oldColumn.dictionaryMap());
}
private static void copyRow(int row, CategoryColumn oldColumn, CategoryColumn newColumn) {
newColumn.add(oldColumn.get(row));
}
private static boolean compare(int row, CategoryColumn tempTable, CategoryColumn original) {
String t = tempTable.get(tempTable.size() - 1);
String o = original.get(row);
return o.equals(t);
}
private static void copy(IntArrayList rows, BooleanColumn oldColumn, BooleanColumn newColumn) {
for (int index : rows) {
newColumn.add(oldColumn.get(index));
}
}
private static boolean compare(int row, BooleanColumn tempTable, BooleanColumn original) {
return original.get(row) == tempTable.get(tempTable.size() - 1);
}
private static void copy(IntArrayList rows, IntColumn oldColumn, IntColumn newColumn) {
for (int index : rows) {
newColumn.add(oldColumn.get(index));
}
}
private static boolean compare(int row, IntColumn tempTable, IntColumn original) {
return original.get(row) == tempTable.get(tempTable.size() - 1);
}
private static void copy(IntArrayList rows, ShortColumn oldColumn, ShortColumn newColumn) {
for (int index : rows) {
newColumn.add(oldColumn.get(index));
}
}
private static boolean compare(int row, ShortColumn tempTable, ShortColumn original) {
short t = tempTable.get(tempTable.size() - 1);
short o = original.get(row);
return o == t;
}
private static void copy(IntArrayList rows, LongColumn oldColumn, LongColumn newColumn) {
for (int index : rows) {
newColumn.add(oldColumn.get(index));
}
}
private static boolean compare(int row, LongColumn tempTable, LongColumn original) {
return original.get(row) == tempTable.get(tempTable.size() - 1);
}
private static void copy(IntArrayList rows, DateTimeColumn oldColumn, DateTimeColumn newColumn) {
for (int index : rows) {
newColumn.add(oldColumn.getLong(index));
}
}
private static boolean compare(int row, DateTimeColumn tempTable, DateTimeColumn original) {
return original.getLong(row) == tempTable.getLong(tempTable.size() - 1);
}
private static void copy(IntArrayList rows, DateColumn oldColumn, DateColumn newColumn) {
for (int index : rows) {
newColumn.add(oldColumn.getInt(index));
}
}
private static boolean compare(int row, DateColumn tempTable, DateColumn original) {
return original.getInt(row) == tempTable.getInt(tempTable.size() - 1);
}
private static void copy(IntArrayList rows, TimeColumn oldColumn, TimeColumn newColumn) {
for (int index : rows) {
newColumn.add(oldColumn.getInt(index));
}
}
private static boolean compare(int row, TimeColumn tempTable, TimeColumn original) {
return original.getInt(row) == tempTable.getInt(tempTable.size() - 1);
}
}