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/**
 * Copyright (C) 2016 - 2030 youtongluan.
 *
 * 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.yx.db.sql.token;

import java.util.Collections;
import java.util.Map;
import java.util.function.Function;

public class MapValueHandler implements Function {
	private final Map map;

	public MapValueHandler(Map param) {
		this.map = param == null ? Collections.emptyMap() : param;
	}

	@Override
	public Object apply(String key) {
		return map.get(key);
	}
}