/*
* 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
*
* 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.springframework.batch.item.file;
import org.springframework.batch.item.file.mapping.FieldSetMapper;
import org.springframework.batch.item.file.transform.LineTokenizer;
/**
* Interface for mapping lines (strings) to domain objects typically used to map lines read from a file to domain objects
* on a per line basis. Implementations of this interface perform the actual
* work of parsing a line without having to deal with how the line was
* obtained.
*
* @author Robert Kasanicky
* @param <T> type of the domain object
* @see FieldSetMapper
* @see LineTokenizer
* @since 2.0
*/
public interface LineMapper<T> {
/**
* Implementations must implement this method to map the provided line to
* the parameter type T. The line number represents the number of lines
* into a file the current line resides.
*
* @param line to be mapped
* @param lineNumber of the current line
* @return mapped object of type T
* @throws Exception if error occurred while parsing.
*/
T mapLine(String line, int lineNumber) throws Exception;
}