spring-batch PatternMatchingCompositeLineTokenizer 源码
spring-batch PatternMatchingCompositeLineTokenizer 代码
文件路径：/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/file/transform/PatternMatchingCompositeLineTokenizer.java
/*
* Copyright 2006-2019 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.batch.item.file.transform;
import java.util.Map;
import org.springframework.batch.support.PatternMatcher;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* A {@link LineTokenizer} implementation that stores a mapping of String patterns to
* delegate {@link LineTokenizer}s. Each line tokenized will be checked to see if it
* matches a pattern. If the line matches a key in the map of delegates, then the
* corresponding delegate {@link LineTokenizer} will be used. Patterns are sorted starting
* with the most specific, and the first match succeeds.
*
* @author Ben Hale
* @author Dan Garrette
* @author Dave Syer
*/
public class PatternMatchingCompositeLineTokenizer implements LineTokenizer, InitializingBean {
private PatternMatcher<LineTokenizer> tokenizers = null;
/*
* (non-Javadoc)
*
* @see org.springframework.batch.item.file.transform.LineTokenizer#tokenize(
* java.lang.String)
*/
@Override
public FieldSet tokenize(@Nullable String line) {
return tokenizers.match(line).tokenize(line);
}
/*
* (non-Javadoc)
*
* @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
*/
@Override
public void afterPropertiesSet() throws Exception {
Assert.isTrue(this.tokenizers != null, "The 'tokenizers' property must be non-empty");
}
public void setTokenizers(Map<String, LineTokenizer> tokenizers) {
Assert.isTrue(!tokenizers.isEmpty(), "The 'tokenizers' property must be non-empty");
this.tokenizers = new PatternMatcher<>(tokenizers);
}
}
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