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 /*
  * 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.transform;
An implementation of LineAggregator that concatenates a collection of items of a common type with the system line separator.

Author(s):
Dave Syer
public class RecursiveCollectionLineAggregator<T> implements LineAggregator<Collection<T>> {
	private static final String LINE_SEPARATOR = System.getProperty("line.separator");
Public setter for the LineAggregator to use on single items, that are not Strings. This can be used to strategise the conversion of collection and array elements to a String.

Parameters:
delegate the line aggregator to set. Defaults to a pass through.
	public void setDelegate(LineAggregator<T> delegate) {
		this. = delegate;
	}
	/*
	 * (non-Javadoc)
	 * @see org.springframework.batch.item.file.transform.LineAggregator#aggregate(java.lang.Object)
	 */
	public String aggregate(Collection<T> items) {
		StringBuilder builder = new StringBuilder();
		for (T value : items) {
		}
		return builder.delete(builder.length()-.length(),builder.length()).toString();
	}
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