spring-kafka Suffixer 源码
spring-kafka Suffixer 代码
文件路径：/spring-kafka/src/main/java/org/springframework/kafka/support/Suffixer.java
/*
* Copyright 2018-2021 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.kafka.support;
import java.util.Collection;
import java.util.stream.Collectors;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* Utility class that suffixes strings.
*
* @author Tomaz Fernandes
* @since 2.7
*
*/
public class Suffixer {
private final String suffix;
public Suffixer(String suffix) {
Assert.notNull(suffix, "Suffix cannot be null");
this.suffix = suffix;
}
public String maybeAddTo(String source) {
if (!StringUtils.hasText(this.suffix)) {
return source;
}
return source != null && StringUtils.hasText(source) // Only suffix if there's text
? source.concat(this.suffix)
: source;
}
public Collection<String> maybeAddTo(Collection<String> sources) {
if (!StringUtils.hasText(this.suffix)) {
return sources;
}
return sources
.stream()
.map(source -> maybeAddTo(source))
.collect(Collectors.toList());
}
}
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