| /* |
| * 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 com.google.common.base.Preconditions.checkNotNull; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import java.util.Map; |
| |
| /** |
| * An implementation of {@link ImmutableTable} that holds a single cell. |
| * |
| * @author Gregory Kick |
| */ |
| @GwtCompatible |
| class SingletonImmutableTable<R, C, V> extends ImmutableTable<R, C, V> { |
| final R singleRowKey; |
| final C singleColumnKey; |
| final V singleValue; |
| |
| SingletonImmutableTable(R rowKey, C columnKey, V value) { |
| this.singleRowKey = checkNotNull(rowKey); |
| this.singleColumnKey = checkNotNull(columnKey); |
| this.singleValue = checkNotNull(value); |
| } |
| |
| SingletonImmutableTable(Cell<R, C, V> cell) { |
| this(cell.getRowKey(), cell.getColumnKey(), cell.getValue()); |
| } |
| |
| @Override |
| public ImmutableMap<R, V> column(C columnKey) { |
| checkNotNull(columnKey); |
| return containsColumn(columnKey) |
| ? ImmutableMap.of(singleRowKey, singleValue) |
| : ImmutableMap.<R, V>of(); |
| } |
| |
| @Override |
| public ImmutableMap<C, Map<R, V>> columnMap() { |
| return ImmutableMap.of(singleColumnKey, (Map<R, V>) ImmutableMap.of(singleRowKey, singleValue)); |
| } |
| |
| @Override |
| public ImmutableMap<R, Map<C, V>> rowMap() { |
| return ImmutableMap.of(singleRowKey, (Map<C, V>) ImmutableMap.of(singleColumnKey, singleValue)); |
| } |
| |
| @Override |
| public int size() { |
| return 1; |
| } |
| |
| @Override |
| ImmutableSet<Cell<R, C, V>> createCellSet() { |
| return ImmutableSet.of(cellOf(singleRowKey, singleColumnKey, singleValue)); |
| } |
| |
| @Override |
| ImmutableCollection<V> createValues() { |
| return ImmutableSet.of(singleValue); |
| } |
| |
| @Override |
| SerializedForm createSerializedForm() { |
| return SerializedForm.create(this, new int[] {0}, new int[] {0}); |
| } |
| } |