/*
* Copyright 2014-2017 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.ftp.dsl;
import java.util.Comparator;
import org.apache.commons.net.ftp.FTPFile;
import org.springframework.integration.file.dsl.RemoteFileStreamingInboundChannelAdapterSpec;
import org.springframework.integration.file.filters.CompositeFileListFilter;
import org.springframework.integration.file.filters.FileListFilter;
import org.springframework.integration.file.remote.AbstractFileInfo;
import org.springframework.integration.file.remote.RemoteFileTemplate;
import org.springframework.integration.ftp.filters.FtpPersistentAcceptOnceFileListFilter;
import org.springframework.integration.ftp.filters.FtpRegexPatternFileListFilter;
import org.springframework.integration.ftp.filters.FtpSimplePatternFileListFilter;
import org.springframework.integration.ftp.inbound.FtpStreamingMessageSource;
import org.springframework.integration.metadata.SimpleMetadataStore;
/**
* A {@link RemoteFileStreamingInboundChannelAdapterSpec} for a
* {@link FtpStreamingMessageSource}.
*
* @author Gary Russell
* @since 5.0
*/
public class FtpStreamingInboundChannelAdapterSpec
extends RemoteFileStreamingInboundChannelAdapterSpec<FTPFile, FtpStreamingInboundChannelAdapterSpec,
FtpStreamingMessageSource> {
FtpStreamingInboundChannelAdapterSpec(RemoteFileTemplate<FTPFile> remoteFileTemplate,
Comparator<AbstractFileInfo<FTPFile>> comparator) {
this.target = new FtpStreamingMessageSource(remoteFileTemplate, comparator);
}
/**
* Specify a simple pattern to match remote files (e.g. '*.txt').
* @param pattern the pattern.
* @see FtpSimplePatternFileListFilter
* @see #filter(org.springframework.integration.file.filters.FileListFilter)
*/
@Override
public FtpStreamingInboundChannelAdapterSpec patternFilter(String pattern) {
return filter(composeFilters(new FtpSimplePatternFileListFilter(pattern)));
}
/**
* Specify a regular expression to match remote files (e.g. '[0-9].*.txt').
* @param regex the expression.
* @see FtpRegexPatternFileListFilter
* @see #filter(org.springframework.integration.file.filters.FileListFilter)
*/
@Override
public FtpStreamingInboundChannelAdapterSpec regexFilter(String regex) {
return filter(composeFilters(new FtpRegexPatternFileListFilter(regex)));
}
@SuppressWarnings("unchecked")
private CompositeFileListFilter<FTPFile> composeFilters(FileListFilter<FTPFile> fileListFilter) {
CompositeFileListFilter<FTPFile> compositeFileListFilter = new CompositeFileListFilter<>();
compositeFileListFilter.addFilters(fileListFilter,
new FtpPersistentAcceptOnceFileListFilter(new SimpleMetadataStore(), "ftpStreamingMessageSource"));
return compositeFileListFilter;
}
}