kafka NonEmptyListValidator 源码

2022-10-20
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kafka NonEmptyListValidator 代码

文件路径：/connect/transforms/src/main/java/org/apache/kafka/connect/transforms/util/NonEmptyListValidator.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.kafka.connect.transforms.util;

import org.apache.kafka.common.config.ConfigDef;
import org.apache.kafka.common.config.ConfigException;

import java.util.List;

public class NonEmptyListValidator implements ConfigDef.Validator {

    @Override
    public void ensureValid(String name, Object value) {
        if (value == null || ((List) value).isEmpty()) {
            throw new ConfigException(name, value, "Empty list");
        }
    }

    @Override
    public String toString() {
        return "non-empty list";
    }

}

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