001/* 002 * Copyright 2006-2007 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.batch.item.file.mapping; 018 019import java.util.Map; 020 021import org.springframework.batch.item.file.LineMapper; 022import org.springframework.batch.item.file.transform.LineTokenizer; 023import org.springframework.batch.item.file.transform.PatternMatchingCompositeLineTokenizer; 024import org.springframework.batch.support.PatternMatcher; 025import org.springframework.beans.factory.InitializingBean; 026import org.springframework.util.Assert; 027 028/** 029 * <p> 030 * A {@link LineMapper} implementation that stores a mapping of String patterns 031 * to delegate {@link LineTokenizer}s as well as a mapping of String patterns to 032 * delegate {@link FieldSetMapper}s. Each line received will be tokenized and 033 * then mapped to a field set. 034 * 035 * <p> 036 * Both the tokenizing and the mapping work in a similar way. The line will be 037 * checked for its matching pattern. If the key matches a pattern in the map of 038 * delegates, then the corresponding delegate will be used. Patterns are sorted 039 * starting with the most specific, and the first match succeeds. 040 * 041 * @see PatternMatchingCompositeLineTokenizer 042 * 043 * @author Dan Garrette 044 * @author Dave Syer 045 * @since 2.0 046 */ 047public class PatternMatchingCompositeLineMapper<T> implements LineMapper<T>, InitializingBean { 048 049 private PatternMatchingCompositeLineTokenizer tokenizer = new PatternMatchingCompositeLineTokenizer(); 050 051 private PatternMatcher<FieldSetMapper<T>> patternMatcher; 052 053 /* 054 * (non-Javadoc) 055 * 056 * @see 057 * org.springframework.batch.item.file.mapping.LineMapper#mapLine(java.lang 058 * .String, int) 059 */ 060 @Override 061 public T mapLine(String line, int lineNumber) throws Exception { 062 return patternMatcher.match(line).mapFieldSet(this.tokenizer.tokenize(line)); 063 } 064 065 /* 066 * (non-Javadoc) 067 * 068 * @see 069 * org.springframework.beans.factory.InitializingBean#afterPropertiesSet() 070 */ 071 @Override 072 public void afterPropertiesSet() throws Exception { 073 this.tokenizer.afterPropertiesSet(); 074 Assert.isTrue(this.patternMatcher != null, "The 'patternMatcher' property must be non-null"); 075 } 076 077 public void setTokenizers(Map<String, LineTokenizer> tokenizers) { 078 this.tokenizer.setTokenizers(tokenizers); 079 } 080 081 public void setFieldSetMappers(Map<String, FieldSetMapper<T>> fieldSetMappers) { 082 Assert.isTrue(!fieldSetMappers.isEmpty(), "The 'fieldSetMappers' property must be non-empty"); 083 this.patternMatcher = new PatternMatcher<FieldSetMapper<T>>(fieldSetMappers); 084 } 085}