S3StreamingMessageSource.java

/*
 * Copyright 2016 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.integration.aws.inbound;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Comparator;
import java.util.List;

import org.springframework.integration.aws.support.S3FileInfo;
import org.springframework.integration.file.remote.AbstractFileInfo;
import org.springframework.integration.file.remote.AbstractRemoteFileStreamingMessageSource;
import org.springframework.integration.file.remote.RemoteFileTemplate;

import com.amazonaws.services.s3.model.S3ObjectSummary;

/**
 * A {@link AbstractRemoteFileStreamingMessageSource} implementation for the Amazon S3.
 *
 * @author Christian Tzolov
 * @since 1.1
 */
public class S3StreamingMessageSource extends AbstractRemoteFileStreamingMessageSource<S3ObjectSummary> {

	public S3StreamingMessageSource(RemoteFileTemplate<S3ObjectSummary> template) {
		super(template, null);
	}

	public S3StreamingMessageSource(RemoteFileTemplate<S3ObjectSummary> template,
									Comparator<AbstractFileInfo<S3ObjectSummary>> comparator) {
		super(template, comparator);
	}

	@Override
	protected List<AbstractFileInfo<S3ObjectSummary>> asFileInfoList(Collection<S3ObjectSummary> collection) {

		List<AbstractFileInfo<S3ObjectSummary>> canonicalFiles = new ArrayList<AbstractFileInfo<S3ObjectSummary>>();
		for (S3ObjectSummary s3ObjectSummary : collection) {
			canonicalFiles.add(new S3FileInfo(s3ObjectSummary));
		}
		return canonicalFiles;
	}

	@Override
	public String getComponentType() {
		return "aws:s3-inbound-streaming-channel-adapter";
	}

}