com.google.common.collect.DenseImmutableTable Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Copyright (C) 2009 The Guava Authors
*
* 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 com.google.common.collect;
import static java.util.Objects.requireNonNull;
import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.ImmutableMap.IteratorBasedImmutableMap;
import com.google.errorprone.annotations.Immutable;
import com.google.j2objc.annotations.WeakOuter;
import java.util.Map;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;
/** A {@code RegularImmutableTable} optimized for dense data. */
@GwtCompatible
@Immutable(containerOf = {"R", "C", "V"})
@ElementTypesAreNonnullByDefault
final class DenseImmutableTable extends RegularImmutableTable {
private final ImmutableMap rowKeyToIndex;
private final ImmutableMap columnKeyToIndex;
private final ImmutableMap> rowMap;
private final ImmutableMap> columnMap;
@SuppressWarnings("Immutable") // We don't modify this after construction.
private final int[] rowCounts;
@SuppressWarnings("Immutable") // We don't modify this after construction.
private final int[] columnCounts;
@SuppressWarnings("Immutable") // We don't modify this after construction.
private final @Nullable V[][] values;
// For each cell in iteration order, the index of that cell's row key in the row key list.
@SuppressWarnings("Immutable") // We don't modify this after construction.
private final int[] cellRowIndices;
// For each cell in iteration order, the index of that cell's column key in the column key list.
@SuppressWarnings("Immutable") // We don't modify this after construction.
private final int[] cellColumnIndices;
DenseImmutableTable(
ImmutableList> cellList,
ImmutableSet rowSpace,
ImmutableSet columnSpace) {
@SuppressWarnings("unchecked")
@Nullable
V[][] array = (@Nullable V[][]) new Object[rowSpace.size()][columnSpace.size()];
this.values = array;
this.rowKeyToIndex = Maps.indexMap(rowSpace);
this.columnKeyToIndex = Maps.indexMap(columnSpace);
rowCounts = new int[rowKeyToIndex.size()];
columnCounts = new int[columnKeyToIndex.size()];
int[] cellRowIndices = new int[cellList.size()];
int[] cellColumnIndices = new int[cellList.size()];
for (int i = 0; i < cellList.size(); i++) {
Cell cell = cellList.get(i);
R rowKey = cell.getRowKey();
C columnKey = cell.getColumnKey();
// The requireNonNull calls are safe because we construct the indexes with indexMap.
int rowIndex = requireNonNull(rowKeyToIndex.get(rowKey));
int columnIndex = requireNonNull(columnKeyToIndex.get(columnKey));
V existingValue = values[rowIndex][columnIndex];
checkNoDuplicate(rowKey, columnKey, existingValue, cell.getValue());
values[rowIndex][columnIndex] = cell.getValue();
rowCounts[rowIndex]++;
columnCounts[columnIndex]++;
cellRowIndices[i] = rowIndex;
cellColumnIndices[i] = columnIndex;
}
this.cellRowIndices = cellRowIndices;
this.cellColumnIndices = cellColumnIndices;
this.rowMap = new RowMap();
this.columnMap = new ColumnMap();
}
/** An immutable map implementation backed by an indexed nullable array. */
private abstract static class ImmutableArrayMap extends IteratorBasedImmutableMap {
private final int size;
ImmutableArrayMap(int size) {
this.size = size;
}
abstract ImmutableMap keyToIndex();
// True if getValue never returns null.
private boolean isFull() {
return size == keyToIndex().size();
}
K getKey(int index) {
return keyToIndex().keySet().asList().get(index);
}
@CheckForNull
abstract V getValue(int keyIndex);
@Override
ImmutableSet createKeySet() {
return isFull() ? keyToIndex().keySet() : super.createKeySet();
}
@Override
public int size() {
return size;
}
@Override
@CheckForNull
public V get(@CheckForNull Object key) {
Integer keyIndex = keyToIndex().get(key);
return (keyIndex == null) ? null : getValue(keyIndex);
}
@Override
UnmodifiableIterator> entryIterator() {
return new AbstractIterator>() {
private int index = -1;
private final int maxIndex = keyToIndex().size();
@Override
@CheckForNull
protected Entry computeNext() {
for (index++; index < maxIndex; index++) {
V value = getValue(index);
if (value != null) {
return Maps.immutableEntry(getKey(index), value);
}
}
return endOfData();
}
};
}
}
private final class Row extends ImmutableArrayMap {
private final int rowIndex;
Row(int rowIndex) {
super(rowCounts[rowIndex]);
this.rowIndex = rowIndex;
}
@Override
ImmutableMap keyToIndex() {
return columnKeyToIndex;
}
@Override
@CheckForNull
V getValue(int keyIndex) {
return values[rowIndex][keyIndex];
}
@Override
boolean isPartialView() {
return true;
}
}
private final class Column extends ImmutableArrayMap {
private final int columnIndex;
Column(int columnIndex) {
super(columnCounts[columnIndex]);
this.columnIndex = columnIndex;
}
@Override
ImmutableMap keyToIndex() {
return rowKeyToIndex;
}
@Override
@CheckForNull
V getValue(int keyIndex) {
return values[keyIndex][columnIndex];
}
@Override
boolean isPartialView() {
return true;
}
}
@WeakOuter
private final class RowMap extends ImmutableArrayMap> {
private RowMap() {
super(rowCounts.length);
}
@Override
ImmutableMap keyToIndex() {
return rowKeyToIndex;
}
@Override
ImmutableMap getValue(int keyIndex) {
return new Row(keyIndex);
}
@Override
boolean isPartialView() {
return false;
}
}
@WeakOuter
private final class ColumnMap extends ImmutableArrayMap> {
private ColumnMap() {
super(columnCounts.length);
}
@Override
ImmutableMap keyToIndex() {
return columnKeyToIndex;
}
@Override
ImmutableMap getValue(int keyIndex) {
return new Column(keyIndex);
}
@Override
boolean isPartialView() {
return false;
}
}
@Override
public ImmutableMap> columnMap() {
// Casts without copying.
ImmutableMap> columnMap = this.columnMap;
return ImmutableMap.>copyOf(columnMap);
}
@Override
public ImmutableMap> rowMap() {
// Casts without copying.
ImmutableMap> rowMap = this.rowMap;
return ImmutableMap.>copyOf(rowMap);
}
@Override
@CheckForNull
public V get(@CheckForNull Object rowKey, @CheckForNull Object columnKey) {
Integer rowIndex = rowKeyToIndex.get(rowKey);
Integer columnIndex = columnKeyToIndex.get(columnKey);
return ((rowIndex == null) || (columnIndex == null)) ? null : values[rowIndex][columnIndex];
}
@Override
public int size() {
return cellRowIndices.length;
}
@Override
Cell getCell(int index) {
int rowIndex = cellRowIndices[index];
int columnIndex = cellColumnIndices[index];
R rowKey = rowKeySet().asList().get(rowIndex);
C columnKey = columnKeySet().asList().get(columnIndex);
// requireNonNull is safe because we use indexes that were populated by the constructor.
V value = requireNonNull(values[rowIndex][columnIndex]);
return cellOf(rowKey, columnKey, value);
}
@Override
V getValue(int index) {
// requireNonNull is safe because we use indexes that were populated by the constructor.
return requireNonNull(values[cellRowIndices[index]][cellColumnIndices[index]]);
}
@Override
SerializedForm createSerializedForm() {
return SerializedForm.create(this, cellRowIndices, cellColumnIndices);
}
}