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Engine Table: Implementation and closely-coupled utilities
/**
* Copyright (c) 2016-2022 Deephaven Data Labs and Patent Pending
*/
package io.deephaven.engine.table.impl;
import io.deephaven.api.*;
import io.deephaven.api.agg.Aggregation;
import io.deephaven.api.Pair;
import io.deephaven.api.agg.spec.AggSpec;
import io.deephaven.api.snapshot.SnapshotWhenOptions;
import io.deephaven.api.snapshot.SnapshotWhenOptions.Flag;
import io.deephaven.datastructures.util.CollectionUtil;
import io.deephaven.engine.table.*;
import io.deephaven.engine.table.hierarchical.RollupTable;
import io.deephaven.engine.table.impl.select.SelectColumn;
import io.deephaven.engine.table.impl.select.SelectColumnFactory;
import io.deephaven.engine.table.impl.select.WouldMatchPairFactory;
import io.deephaven.api.util.ConcurrentMethod;
import io.deephaven.engine.util.ColumnFormatting;
import io.deephaven.engine.liveness.LivenessScopeStack;
import io.deephaven.util.annotations.FinalDefault;
import javax.annotation.Nullable;
import java.util.*;
import java.util.function.UnaryOperator;
import java.util.stream.Collectors;
/**
* Sub-interface to capture default methods rom {@link Table}.
*/
public interface TableDefaults extends Table, TableOperationsDefaults {
Table[] ZERO_LENGTH_TABLE_ARRAY = new Table[0];
@Override
default Table coalesce() {
if (isRefreshing()) {
LivenessScopeStack.peek().manage(this);
}
return this;
}
// -----------------------------------------------------------------------------------------------------------------
// Metadata
// -----------------------------------------------------------------------------------------------------------------
@Override
@ConcurrentMethod
@FinalDefault
default Table meta() {
List columnNames = new ArrayList<>();
List columnDataTypes = new ArrayList<>();
List columnTypes = new ArrayList<>();
List columnPartitioning = new ArrayList<>();
List columnGrouping = new ArrayList<>();
for (ColumnDefinition cDef : getDefinition().getColumns()) {
columnNames.add(cDef.getName());
final Class dataType = cDef.getDataType();
final String dataTypeName = dataType.getCanonicalName();
columnDataTypes.add(dataTypeName == null ? dataType.getName() : dataTypeName);
columnTypes.add(cDef.getColumnType().name());
columnPartitioning.add(cDef.isPartitioning());
columnGrouping.add(cDef.isGrouping());
}
final String[] resultColumnNames = {"Name", "DataType", "ColumnType", "IsPartitioning", "IsGrouping"};
final Object[] resultValues = {
columnNames.toArray(CollectionUtil.ZERO_LENGTH_STRING_ARRAY),
columnDataTypes.toArray(CollectionUtil.ZERO_LENGTH_STRING_ARRAY),
columnTypes.toArray(CollectionUtil.ZERO_LENGTH_STRING_ARRAY),
columnPartitioning.toArray(new Boolean[0]),
columnGrouping.toArray(new Boolean[0]),
};
return new InMemoryTable(resultColumnNames, resultValues);
}
@Override
@ConcurrentMethod
@FinalDefault
default int numColumns() {
return getDefinition().numColumns();
}
@Override
@ConcurrentMethod
@FinalDefault
default boolean hasColumns(final String... columnNames) {
if (columnNames == null) {
throw new IllegalArgumentException("columnNames cannot be null!");
}
return hasColumns(Arrays.asList(columnNames));
}
@Override
@ConcurrentMethod
@FinalDefault
default boolean hasColumns(Collection columnNames) {
if (columnNames == null) {
throw new IllegalArgumentException("columnNames cannot be null!");
}
return getDefinition().getColumnNameSet().containsAll(columnNames);
}
@Override
default long sizeForInstrumentation() {
return size();
}
@Override
@FinalDefault
default boolean isEmpty() {
return size() == 0;
}
// -----------------------------------------------------------------------------------------------------------------
// ColumnSources for fetching data by row key
// -----------------------------------------------------------------------------------------------------------------
@Override
@FinalDefault
default ColumnSource getColumnSource(String sourceName, Class clazz) {
@SuppressWarnings("rawtypes")
ColumnSource rawColumnSource = getColumnSource(sourceName);
// noinspection unchecked
return rawColumnSource.cast(clazz);
}
@Override
@FinalDefault
default ColumnSource getColumnSource(String sourceName, Class clazz,
@Nullable Class componentType) {
@SuppressWarnings("rawtypes")
ColumnSource rawColumnSource = getColumnSource(sourceName);
// noinspection unchecked
return rawColumnSource.cast(clazz, componentType);
}
// -----------------------------------------------------------------------------------------------------------------
// Filter Operations
// -----------------------------------------------------------------------------------------------------------------
@Override
@ConcurrentMethod
@FinalDefault
default Table wouldMatch(String... expressions) {
return wouldMatch(WouldMatchPairFactory.getExpressions(expressions));
}
// -----------------------------------------------------------------------------------------------------------------
// Column Selection Operations
// -----------------------------------------------------------------------------------------------------------------
@Override
@ConcurrentMethod
@FinalDefault
default Table selectDistinct() {
return selectDistinct(getDefinition().getColumnNamesArray());
}
@Override
@ConcurrentMethod
@FinalDefault
default Table dropColumnFormats() {
String[] columnAry = getDefinition().getColumnStream()
.map(ColumnDefinition::getName)
.filter(ColumnFormatting::isFormattingColumn)
.toArray(String[]::new);
if (columnAry.length == 0) {
if (isRefreshing()) {
LivenessScopeStack.peek().manage(this);
}
return this;
}
return dropColumns(columnAry);
}
@Override
@FinalDefault
default Table renameColumns(String... pairs) {
return renameColumns(Pair.from(pairs));
}
@Override
@FinalDefault
default Table renameAllColumns(UnaryOperator renameFunction) {
return renameColumns(getDefinition()
.getColumnStream()
.map(ColumnDefinition::getName)
.map(n -> Pair.of(ColumnName.of(n), ColumnName.of(renameFunction.apply(n))))
.collect(Collectors.toList()));
}
@Override
@ConcurrentMethod
@FinalDefault
default Table formatRowWhere(String condition, String formula) {
return formatColumnWhere(ColumnFormatting.Constants.ROW_FORMAT_WILDCARD, condition, formula);
}
@Override
@ConcurrentMethod
@FinalDefault
default Table formatColumnWhere(String columnName, String condition, String formula) {
return formatColumns(
columnName + " = (" + condition + ") ? io.deephaven.engine.util.ColorUtil.toLong(" + formula
+ ") : io.deephaven.engine.util.ColorUtil.toLong(NO_FORMATTING)");
}
@Override
@ConcurrentMethod
@FinalDefault
default Table formatColumns(String... columnFormats) {
final List selectColumns = Arrays.asList(SelectColumnFactory.getFormatExpressions(columnFormats));
final Set existingColumns = getDefinition().getColumnNames()
.stream()
.filter(column -> !ColumnFormatting.isFormattingColumn(column))
.collect(Collectors.toSet());
final String[] unknownColumns = selectColumns.stream()
.map(sc -> ColumnFormatting.getFormatBaseColumn(sc.getName()))
.filter(column -> (column != null
&& !column.equals(ColumnFormatting.Constants.ROW_FORMAT_WILDCARD)
&& !existingColumns.contains(column)))
.toArray(String[]::new);
if (unknownColumns.length > 0) {
throw new RuntimeException(
"Unknown columns: " + Arrays.toString(unknownColumns) + ", available columns = " + existingColumns);
}
return updateView(selectColumns);
}
@Override
@ConcurrentMethod
@FinalDefault
default Table moveColumnsUp(String... columnsToMove) {
return moveColumns(0, columnsToMove);
}
@Override
@ConcurrentMethod
@FinalDefault
default Table moveColumnsDown(String... columnsToMove) {
return moveColumns(numColumns() - columnsToMove.length, columnsToMove);
}
// -----------------------------------------------------------------------------------------------------------------
// Join Operations
// -----------------------------------------------------------------------------------------------------------------
@Override
@FinalDefault
default Table join(Table rightTable, Collection columnsToMatch,
Collection columnsToAdd) {
return join(
rightTable,
columnsToMatch,
columnsToAdd,
CrossJoinHelper.DEFAULT_NUM_RIGHT_BITS_TO_RESERVE);
}
// -----------------------------------------------------------------------------------------------------------------
// Aggregation Operations
// -----------------------------------------------------------------------------------------------------------------
@Override
@FinalDefault
default Table headBy(long nRows, Collection groupByColumnNames) {
return headBy(nRows, groupByColumnNames.toArray(CollectionUtil.ZERO_LENGTH_STRING_ARRAY));
}
@Override
@FinalDefault
default Table tailBy(long nRows, Collection groupByColumnNames) {
return tailBy(nRows, groupByColumnNames.toArray(CollectionUtil.ZERO_LENGTH_STRING_ARRAY));
}
@Override
@ConcurrentMethod
@FinalDefault
default Table applyToAllBy(String formulaColumn, String columnParamName,
Collection groupByColumns) {
return aggAllBy(AggSpec.formula(formulaColumn, columnParamName), groupByColumns.toArray(ColumnName[]::new));
}
@Override
@ConcurrentMethod
@FinalDefault
default Table applyToAllBy(String formulaColumn, Collection groupByColumns) {
return applyToAllBy(formulaColumn, "each", groupByColumns);
}
@Override
@ConcurrentMethod
@FinalDefault
default Table applyToAllBy(String formulaColumn, String... groupByColumns) {
return applyToAllBy(formulaColumn, ColumnName.from(groupByColumns));
}
// -----------------------------------------------------------------------------------------------------------------
// PartitionBy Operations
// -----------------------------------------------------------------------------------------------------------------
@Override
@ConcurrentMethod
@FinalDefault
default PartitionedTable partitionBy(String... keyColumnNames) {
return partitionBy(false, keyColumnNames);
}
// -----------------------------------------------------------------------------------------------------------------
// Hierarchical table operations (rollup and tree).
// -----------------------------------------------------------------------------------------------------------------
@Override
@ConcurrentMethod
@FinalDefault
default RollupTable rollup(Collection aggregations) {
return rollup(aggregations, Collections.emptyList());
}
@Override
@ConcurrentMethod
@FinalDefault
default RollupTable rollup(Collection aggregations, boolean includeConstituents) {
return rollup(aggregations, includeConstituents, Collections.emptyList());
}
@Override
@ConcurrentMethod
@FinalDefault
default RollupTable rollup(Collection aggregations, String... groupByColumns) {
return rollup(aggregations, ColumnName.from(groupByColumns));
}
@Override
@ConcurrentMethod
@FinalDefault
default RollupTable rollup(Collection aggregations, boolean includeConstituents,
String... groupByColumns) {
return rollup(aggregations, includeConstituents, ColumnName.from(groupByColumns));
}
@Override
@ConcurrentMethod
@FinalDefault
default RollupTable rollup(Collection aggregations,
Collection groupByColumns) {
return rollup(aggregations, false, groupByColumns);
}
// -----------------------------------------------------------------------------------------------------------------
// Snapshot Operations
// -----------------------------------------------------------------------------------------------------------------
@Override
@FinalDefault
default Table snapshotWhen(Table trigger, Flag... features) {
return snapshotWhen(trigger, SnapshotWhenOptions.of(features));
}
@Override
@FinalDefault
default Table snapshotWhen(Table trigger, Collection features, String... stampColumns) {
return snapshotWhen(trigger, SnapshotWhenOptions.of(features, stampColumns));
}
// -----------------------------------------------------------------------------------------------------------------
// Resource Management
// -----------------------------------------------------------------------------------------------------------------
@Override
@FinalDefault
default void close() {
releaseCachedResources();
}
@Override
default void releaseCachedResources() {}
// -----------------------------------------------------------------------------------------------------------------
// Methods for dynamic tables
// -----------------------------------------------------------------------------------------------------------------
@Override
@FinalDefault
default void addUpdateListener(ShiftObliviousListener listener) {
addUpdateListener(listener, false);
}
}
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