io.deephaven.engine.table.impl.MemoizedOperationKey Maven / Gradle / Ivy
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/**
* Copyright (c) 2016-2022 Deephaven Data Labs and Patent Pending
*/
package io.deephaven.engine.table.impl;
import io.deephaven.api.ColumnName;
import io.deephaven.api.JoinMatch;
import io.deephaven.api.RangeJoinMatch;
import io.deephaven.api.agg.Aggregation;
import io.deephaven.engine.table.Table;
import io.deephaven.engine.table.WouldMatchPair;
import io.deephaven.engine.table.impl.select.*;
import io.deephaven.engine.table.impl.sources.regioned.SymbolTableSource;
import org.jetbrains.annotations.NotNull;
import java.lang.ref.WeakReference;
import java.util.*;
/**
* Indices for memoized operations on QueryTable.
*
* When a null key is returned from one of the static methods; the operation will not be memoized (e.g., if we might
* depend on the query scope; we can't memoize the operation).
*/
public abstract class MemoizedOperationKey {
/**
* Returns true if the attributes are compatible for this operation. If two table are identical, but for attributes
* many of the operations can be reused. In cases where they can, it would be wasteful to reapply them.
*
* @param oldAttributes the attributes on the table that already is memoized
* @param newAttributes the attributes on the table this is not yet memoized
*
* @return true if the attributes are compatible for this operation.
*/
boolean attributesCompatible(Map oldAttributes, Map newAttributes) {
// this is the safe default
return false;
}
/**
* Returns the Copy type for this operation.
*
* @return the attribute copy type that should be used when transferring a memoized table across a copy.
*/
BaseTable.CopyAttributeOperation copyType() {
throw new UnsupportedOperationException();
}
BaseTable.CopyAttributeOperation getParentCopyType() {
return BaseTable.CopyAttributeOperation.None;
}
abstract static class AttributeAgnosticMemoizedOperationKey extends MemoizedOperationKey {
@Override
boolean attributesCompatible(Map oldAttributes, Map newAttributes) {
return true;
}
@Override
abstract BaseTable.CopyAttributeOperation copyType();
}
public interface Provider {
MemoizedOperationKey getMemoKey();
}
static MemoizedOperationKey selectUpdateViewOrUpdateView(SelectColumn[] selectColumn,
SelectUpdateViewOrUpdateView.Flavor flavor) {
if (isMemoizable(selectColumn)) {
return new SelectUpdateViewOrUpdateView(selectColumn, flavor);
} else {
return null;
}
}
public static MemoizedOperationKey flatten() {
return Flatten.FLATTEN_INSTANCE;
}
static MemoizedOperationKey sort(SortPair[] sortPairs) {
return new Sort(sortPairs);
}
static MemoizedOperationKey dropColumns(String[] columns) {
return new DropColumns(columns);
}
static MemoizedOperationKey filter(WhereFilter[] filters) {
if (Arrays.stream(filters).allMatch(WhereFilter::canMemoize)) {
return new Filter(filters);
}
return null;
}
public static MemoizedOperationKey reverse() {
return Reverse.REVERSE_INSTANCE;
}
public static MemoizedOperationKey tree(String idColumn, String parentColumn) {
return new Tree(idColumn, parentColumn);
}
public static MemoizedOperationKey aggBy(
Collection aggregations,
boolean preserveEmpty,
Table initialGroups,
Collection groupByColumns) {
return new AggBy(new ArrayList<>(aggregations), preserveEmpty, initialGroups, new ArrayList<>(groupByColumns));
}
public static MemoizedOperationKey partitionBy(boolean dropKeys, Collection groupByColumns) {
return new PartitionBy(dropKeys, new ArrayList<>(groupByColumns));
}
public static MemoizedOperationKey rollup(Collection aggregations,
Collection groupByColumns, boolean includeConstituents) {
return new Rollup(new AggBy(new ArrayList<>(aggregations), false, null, new ArrayList<>(groupByColumns)),
includeConstituents);
}
public static MemoizedOperationKey blinkToAppendOnly(final long sizeLimit, @NotNull final Object key) {
return new BlinkToAppendOnly(sizeLimit, key);
}
private static boolean isMemoizable(SelectColumn[] selectColumn) {
return Arrays.stream(selectColumn)
.allMatch(sc -> sc instanceof SourceColumn || sc instanceof ReinterpretedColumn);
}
private static class Flatten extends AttributeAgnosticMemoizedOperationKey {
static final Flatten FLATTEN_INSTANCE = new Flatten();
@Override
public int hashCode() {
return getClass().hashCode();
}
@Override
public boolean equals(Object obj) {
return obj instanceof Flatten;
}
@Override
BaseTable.CopyAttributeOperation copyType() {
return BaseTable.CopyAttributeOperation.Flatten;
}
}
static class SelectUpdateViewOrUpdateView extends AttributeAgnosticMemoizedOperationKey {
public enum Flavor {
Select, Update, View, UpdateView
}
private final SelectColumn[] selectColumns;
private final Flavor flavor;
private SelectUpdateViewOrUpdateView(SelectColumn[] selectColumns, Flavor flavor) {
this.selectColumns = selectColumns;
this.flavor = flavor;
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
final SelectUpdateViewOrUpdateView selectOrView = (SelectUpdateViewOrUpdateView) other;
return flavor == selectOrView.flavor && Arrays.equals(selectColumns, selectOrView.selectColumns);
}
@Override
public int hashCode() {
return Objects.hash(flavor, Arrays.hashCode(selectColumns));
}
@Override
BaseTable.CopyAttributeOperation copyType() {
switch (flavor) {
case View:
case UpdateView:
return BaseTable.CopyAttributeOperation.View;
case Select:
case Update:
// turns out select doesn't copy attributes, maybe we should more accurately codify that
return BaseTable.CopyAttributeOperation.None;
default:
throw new UnsupportedOperationException("Unexpected flavor " + flavor);
}
}
}
static class DropColumns extends AttributeAgnosticMemoizedOperationKey {
private final String[] columns;
private DropColumns(String[] columns) {
this.columns = Arrays.copyOf(columns, columns.length);
Arrays.sort(this.columns);
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
final DropColumns dropColumns = (DropColumns) other;
return Arrays.equals(columns, dropColumns.columns);
}
@Override
public int hashCode() {
return Arrays.hashCode(columns);
}
@Override
BaseTable.CopyAttributeOperation copyType() {
return BaseTable.CopyAttributeOperation.DropColumns;
}
}
private static class Sort extends MemoizedOperationKey {
private final SortPair[] sortPairs;
private Sort(SortPair[] sortPairs) {
this.sortPairs = sortPairs;
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
final Sort sort = (Sort) other;
return Arrays.equals(sortPairs, sort.sortPairs);
}
@Override
public int hashCode() {
return Arrays.hashCode(sortPairs);
}
@Override
boolean attributesCompatible(Map oldAttributes, Map newAttributes) {
final String parentRestrictions = (String) oldAttributes.get(Table.SORTABLE_COLUMNS_ATTRIBUTE);
final String newRestrictions = (String) newAttributes.get(Table.SORTABLE_COLUMNS_ATTRIBUTE);
return Objects.equals(parentRestrictions, newRestrictions);
}
@Override
BaseTable.CopyAttributeOperation copyType() {
return BaseTable.CopyAttributeOperation.Sort;
}
}
private static class Reverse extends AttributeAgnosticMemoizedOperationKey {
static final Reverse REVERSE_INSTANCE = new Reverse();
@Override
public boolean equals(final Object other) {
return other != null && getClass() == other.getClass();
}
@Override
public int hashCode() {
return getClass().hashCode();
}
@Override
BaseTable.CopyAttributeOperation copyType() {
return BaseTable.CopyAttributeOperation.Reverse;
}
}
private static class Filter extends AttributeAgnosticMemoizedOperationKey {
private final WhereFilter[] filters;
private Filter(WhereFilter[] filters) {
this.filters = filters;
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
final Filter filter = (Filter) other;
return Arrays.equals(filters, filter.filters);
}
@Override
public int hashCode() {
return Arrays.hashCode(filters);
}
@Override
BaseTable.CopyAttributeOperation copyType() {
return BaseTable.CopyAttributeOperation.Filter;
}
}
private static class Tree extends MemoizedOperationKey {
private final String idColumn;
private final String parentColumn;
private Tree(String idColumn, String parentColumn) {
this.idColumn = idColumn;
this.parentColumn = parentColumn;
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
final Tree tree = (Tree) other;
return Objects.equals(idColumn, tree.idColumn) &&
Objects.equals(parentColumn, tree.parentColumn);
}
@Override
public int hashCode() {
return Objects.hash(idColumn, parentColumn);
}
@Override
BaseTable.CopyAttributeOperation copyType() {
return BaseTable.CopyAttributeOperation.Tree;
}
@Override
BaseTable.CopyAttributeOperation getParentCopyType() {
return BaseTable.CopyAttributeOperation.TreeCopy;
}
}
private static class AggBy extends AttributeAgnosticMemoizedOperationKey {
private final List aggregations;
private final boolean preserveEmpty;
private final WeakReference initialGroups;
private final List groupByColumns;
private final int cachedHashCode;
private AggBy(
List aggregations,
boolean preserveEmpty,
Table initialGroups,
List groupByColumns) {
this.aggregations = aggregations;
this.preserveEmpty = preserveEmpty;
this.initialGroups = initialGroups == null ? null : new WeakReference<>(initialGroups);
this.groupByColumns = groupByColumns;
int hash = aggregations.hashCode();
hash = 31 * hash + Boolean.hashCode(preserveEmpty);
hash = 31 * hash + System.identityHashCode(initialGroups);
hash = 31 * hash + groupByColumns.hashCode();
this.cachedHashCode = hash;
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
AggBy aggBy = (AggBy) other;
return aggregations.equals(aggBy.aggregations)
&& preserveEmpty == aggBy.preserveEmpty
&& equalWeakRefsByReferentIdentity(initialGroups, aggBy.initialGroups)
&& groupByColumns.equals(aggBy.groupByColumns);
}
@Override
public int hashCode() {
return cachedHashCode;
}
@Override
BaseTable.CopyAttributeOperation copyType() {
return BaseTable.CopyAttributeOperation.None;
}
}
static class PartitionBy extends MemoizedOperationKey {
private final boolean dropKeys;
private final List groupByColumns;
private PartitionBy(boolean dropKeys, List groupByColumns) {
this.dropKeys = dropKeys;
this.groupByColumns = groupByColumns;
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
PartitionBy that = (PartitionBy) other;
return dropKeys == that.dropKeys && groupByColumns.equals(that.groupByColumns);
}
@Override
public int hashCode() {
int result = (dropKeys ? 1 : 0);
result = 31 * result + groupByColumns.hashCode();
return result;
}
}
private static class Rollup extends AttributeAgnosticMemoizedOperationKey {
private final AggBy aggBy;
private final boolean includeConstituents;
Rollup(AggBy aggBy, boolean includeConstituents) {
this.includeConstituents = includeConstituents;
this.aggBy = aggBy;
}
@Override
public int hashCode() {
return 31 * aggBy.hashCode() + Boolean.hashCode(includeConstituents);
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
final Rollup rollup = (Rollup) other;
return includeConstituents == rollup.includeConstituents && Objects.equals(aggBy, rollup.aggBy);
}
@Override
BaseTable.CopyAttributeOperation copyType() {
return BaseTable.CopyAttributeOperation.Rollup;
}
@Override
BaseTable.CopyAttributeOperation getParentCopyType() {
return BaseTable.CopyAttributeOperation.RollupCopy;
}
}
public static MemoizedOperationKey symbolTable(@NotNull final SymbolTableSource symbolTableSource,
final boolean useLookupCaching) {
return new SymbolTable(symbolTableSource, useLookupCaching);
}
private static final class SymbolTable extends MemoizedOperationKey {
private final SymbolTableSource symbolTableSource;
private final boolean useLookupCaching;
private SymbolTable(@NotNull final SymbolTableSource symbolTableSource, final boolean useLookupCaching) {
this.symbolTableSource = symbolTableSource;
this.useLookupCaching = useLookupCaching;
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
final SymbolTable that = (SymbolTable) other;
// NB: We use the symbolTableSource's identity for comparison
return symbolTableSource == that.symbolTableSource && useLookupCaching == that.useLookupCaching;
}
@Override
public int hashCode() {
return 31 * System.identityHashCode(symbolTableSource) + Boolean.hashCode(useLookupCaching);
}
}
private static final class WouldMatch extends AttributeAgnosticMemoizedOperationKey {
private final WouldMatchPair[] pairs;
private WouldMatch(WouldMatchPair[] pairs) {
this.pairs = pairs;
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
final WouldMatch wouldMatch = (WouldMatch) other;
return Arrays.equals(pairs, wouldMatch.pairs);
}
@Override
public int hashCode() {
return Arrays.hashCode(pairs);
}
@Override
BaseTable.CopyAttributeOperation copyType() {
return BaseTable.CopyAttributeOperation.WouldMatch;
}
}
public static MemoizedOperationKey wouldMatch(WouldMatchPair... pairs) {
return new WouldMatch(pairs);
}
private static class CrossJoin extends AttributeAgnosticMemoizedOperationKey {
private final WeakReference rightTableReference;
private final MatchPair[] columnsToMatch;
private final MatchPair[] columnsToAdd;
private final int numRightBitsToReserve;
private final int cachedHashCode;
CrossJoin(final Table rightTable, final MatchPair[] columnsToMatch,
final MatchPair[] columnsToAdd, final int numRightBitsToReserve) {
this.rightTableReference = new WeakReference<>(rightTable);
this.columnsToMatch = columnsToMatch;
this.columnsToAdd = columnsToAdd;
this.numRightBitsToReserve = numRightBitsToReserve;
// precompute hash as right table may disappear
int hash = Integer.hashCode(numRightBitsToReserve);
hash = 31 * hash + System.identityHashCode(rightTable);
hash = 31 * hash + Arrays.hashCode(columnsToMatch);
hash = 31 * hash + Arrays.hashCode(columnsToAdd);
this.cachedHashCode = hash;
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
final CrossJoin crossJoin = (CrossJoin) other;
return equalWeakRefsByReferentIdentity(rightTableReference, crossJoin.rightTableReference) &&
numRightBitsToReserve == crossJoin.numRightBitsToReserve &&
Arrays.equals(columnsToMatch, crossJoin.columnsToMatch) &&
Arrays.equals(columnsToAdd, crossJoin.columnsToAdd);
}
@Override
public int hashCode() {
return cachedHashCode;
}
@Override
BaseTable.CopyAttributeOperation copyType() {
return BaseTable.CopyAttributeOperation.None;
}
}
public static MemoizedOperationKey crossJoin(final Table rightTable, final MatchPair[] columnsToMatch,
final MatchPair[] columnsToAdd, final int numRightBitsToReserve) {
return new CrossJoin(rightTable, columnsToMatch, columnsToAdd, numRightBitsToReserve);
}
private static class RangeJoin extends AttributeAgnosticMemoizedOperationKey {
private final WeakReference rightTableReference;
private final JoinMatch[] exactMatches;
private final RangeJoinMatch rangeMatch;
private final Aggregation[] aggregations;
private final int cachedHashCode;
private RangeJoin(
@NotNull final Table rightTable,
@NotNull final Collection exactMatches,
@NotNull final RangeJoinMatch rangeMatch,
@NotNull final Collection aggregations) {
this.rightTableReference = new WeakReference<>(rightTable);
this.exactMatches = exactMatches.toArray(JoinMatch[]::new);
this.rangeMatch = rangeMatch;
this.aggregations = aggregations.toArray(Aggregation[]::new);
// precompute hash as right table may disappear
int hash = System.identityHashCode(rightTable);
hash = 31 * hash + Arrays.hashCode(this.exactMatches);
hash = 31 * hash + rangeMatch.hashCode();
hash = 31 * hash + Arrays.hashCode(this.aggregations);
this.cachedHashCode = hash;
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
final RangeJoin otherRangeJoin = (RangeJoin) other;
return equalWeakRefsByReferentIdentity(rightTableReference, otherRangeJoin.rightTableReference) &&
Arrays.equals(exactMatches, otherRangeJoin.exactMatches) &&
rangeMatch.equals(otherRangeJoin.rangeMatch) &&
Arrays.equals(aggregations, otherRangeJoin.aggregations);
}
@Override
public int hashCode() {
return cachedHashCode;
}
@Override
BaseTable.CopyAttributeOperation copyType() {
return BaseTable.CopyAttributeOperation.None;
}
}
public static MemoizedOperationKey rangeJoin(
@NotNull final Table rightTable,
@NotNull final Collection exactMatches,
@NotNull final RangeJoinMatch rangeMatch,
@NotNull final Collection aggregations) {
return new RangeJoin(rightTable, exactMatches, rangeMatch, aggregations);
}
protected static boolean equalWeakRefsByReferentIdentity(final WeakReference r1, final WeakReference r2) {
if (r1 == r2) {
return true;
}
if (r1 == null || r2 == null) {
return false;
}
final Object t1 = r1.get();
final Object t2 = r2.get();
if (t1 == null || t2 == null) {
return false;
}
return t1 == t2;
}
private static class BlinkToAppendOnly extends AttributeAgnosticMemoizedOperationKey {
private final long sizeLimit;
private final Object key;
private BlinkToAppendOnly(final long sizeLimit, @NotNull final Object key) {
this.sizeLimit = sizeLimit;
this.key = Objects.requireNonNull(key);
}
@Override
public boolean equals(final Object other) {
if (this == other) {
return true;
}
if (other == null || getClass() != other.getClass()) {
return false;
}
final BlinkToAppendOnly blinkToAppendOnly = (BlinkToAppendOnly) other;
return sizeLimit == blinkToAppendOnly.sizeLimit && key.equals(blinkToAppendOnly.key);
}
@Override
public int hashCode() {
return 31 * key.hashCode() + Long.hashCode(sizeLimit);
}
@Override
BaseTable.CopyAttributeOperation copyType() {
return BaseTable.CopyAttributeOperation.None;
}
}
}
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