spring-batch SuffixRecordSeparatorPolicy 源码
spring-batch SuffixRecordSeparatorPolicy 代码
文件路径：/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/file/separator/SuffixRecordSeparatorPolicy.java
/*
* Copyright 2006-2007 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.separator;
/**
* A {@link RecordSeparatorPolicy} that looks for an exact match for a String at the end
* of a line (e.g. a semicolon).
*
* @author Dave Syer
*
*/
public class SuffixRecordSeparatorPolicy extends DefaultRecordSeparatorPolicy {
/**
* Default value for record terminator suffix.
*/
public static final String DEFAULT_SUFFIX = ";";
private String suffix = DEFAULT_SUFFIX;
private boolean ignoreWhitespace = true;
/**
* Lines ending in this terminator String signal the end of a record.
* @param suffix suffix to indicate the end of a record
*/
public void setSuffix(String suffix) {
this.suffix = suffix;
}
/**
* Flag to indicate that the decision to terminate a record should ignore whitespace
* at the end of the line.
* @param ignoreWhitespace indicator
*/
public void setIgnoreWhitespace(boolean ignoreWhitespace) {
this.ignoreWhitespace = ignoreWhitespace;
}
/**
* Return true if the line ends with the specified substring. By default whitespace is
* trimmed before the comparison. Also returns true if the line is null, but not if it
* is empty.
*
* @see org.springframework.batch.item.file.separator.RecordSeparatorPolicy#isEndOfRecord(java.lang.String)
*/
@Override
public boolean isEndOfRecord(String line) {
if (line == null) {
return true;
}
String trimmed = ignoreWhitespace ? line.trim() : line;
return trimmed.endsWith(suffix);
}
/**
* Remove the suffix from the end of the record.
*
* @see org.springframework.batch.item.file.separator.SimpleRecordSeparatorPolicy#postProcess(java.lang.String)
*/
@Override
public String postProcess(String record) {
if (record == null) {
return null;
}
return record.substring(0, record.lastIndexOf(suffix));
}
}
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