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/*
* 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 com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import java.util.Map;
/**
* An implementation of {@link ImmutableTable} that holds a single cell.
*
* @author Gregory Kick
*/
@GwtCompatible
@ElementTypesAreNonnullByDefault
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
@J2ktIncompatible // serialization
@GwtIncompatible // serialization
Object writeReplace() {
return SerializedForm.create(this, new int[] {0}, new int[] {0});
}
}
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