EmptyGrid.java
/*
* Copyright 2014-present Stephen Colebourne
*
* 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 org.joda.collect.grid;
import java.io.Serializable;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSortedSet;
/**
* Immutable implementation of the {@code Grid} data structure storing no cells.
*
* @param <V> the type of the value
* @author Stephen Colebourne
*/
final class EmptyGrid<V> extends ImmutableGrid<V> implements Serializable {
/** Serialization version. */
private static final long serialVersionUID = 1L;
/**
* The row count.
*/
private final int rowCount;
/**
* The column count.
*/
private final int columnCount;
/**
* Restricted constructor.
*/
EmptyGrid() {
this.rowCount = 0;
this.columnCount = 0;
}
/**
* Restricted constructor.
*/
EmptyGrid(int rowCount, int columnCount) {
validateCounts(rowCount, columnCount);
this.rowCount = rowCount;
this.columnCount = columnCount;
}
//-----------------------------------------------------------------------
@Override
public int rowCount() {
return rowCount;
}
@Override
public int columnCount() {
return columnCount;
}
@Override
public int size() {
return 0;
}
@Override
public boolean contains(int row, int column) {
return false;
}
@Override
public boolean containsValue(Object valueToFind) {
return false;
}
@Override
public V get(int row, int column) {
return null;
}
@Override
public Cell<V> cell(int row, int column) {
return null;
}
//-----------------------------------------------------------------------
@Override
public ImmutableSortedSet<Cell<V>> cells() {
return ImmutableSortedSet.of();
}
@Override
public ImmutableList<V> values() {
return ImmutableList.of();
}
}