DelimitedLineAggregator.java

package fr.acxio.tools.agia.transform;

/*
 * Copyright 2014 Acxio
 * 
 * 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.
 */

import org.springframework.batch.item.file.transform.ExtractorLineAggregator;

/**
 * <p>
 * A {@link org.springframework.batch.item.file.transform.LineAggregator
 * LineAggregator} implementation that converts an object into a delimited list
 * of strings. The default delimiter is a comma and the default quote character
 * is a double-quote.
 * </p>
 * 
 * @author pcollardez
 */
public class DelimitedLineAggregator<T> extends ExtractorLineAggregator<T> {

    private String delimiter = ",";

    private char quoteCharacter = '"';

    /**
     * Public setter for the delimiter.
     * 
     * @param sDelimiter
     *            the delimiter to set
     */
    public void setDelimiter(String sDelimiter) {
        delimiter = sDelimiter;
    }

    public void setQuoteCharacter(char sQuoteCharacter) {
        quoteCharacter = sQuoteCharacter;
    }

    @Override
    public String doAggregate(Object[] fields) {
        StringBuilder aStringBuilder = new StringBuilder();
        int nbFields = (fields.length - 1);
        for (int i = 0; i <= nbFields; i++) {
            aStringBuilder.append(quoteCharacter).append(fields[i]).append(quoteCharacter);
            if (i < nbFields) {
                aStringBuilder.append(delimiter);
            }
        }
        return aStringBuilder.toString();
    }
}