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Cassandra support for Spring Data
/*
* Copyright 2013-2021 the original author or 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
*
* https://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.springframework.data.cassandra.util;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* Builder for maps, which also conveniently implements {@link Map} via delegation for convenience so you don't have to
* actually {@link #build()} it.
*
* @author Matthew T. Adams
* @author Mark Paluch
* @param The key type of the map.
* @param The value type of the map.
*/
public class MapBuilder implements Map {
private final Map map;
/**
* Create a new {@link MapBuilder}.
*/
public MapBuilder() {
this(Collections.emptyMap());
}
/**
* Create a new instance with a copy of the given map.
*
* @param source must not be {@literal null}
*/
public MapBuilder(Map source) {
Assert.notNull(source, "Source map must not be null");
this.map = new LinkedHashMap<>(source);
}
/**
* Factory method to construct a new {@code MapBuilder