org.springframework.amqp.support.postprocessor.UnzipPostProcessor Maven / Gradle / Ivy
/*
* Copyright 2014-2019 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
*
* https://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.amqp.support.postprocessor;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.springframework.util.Assert;
/**
* A post processor that uses a {@link ZipInputStream} to decompress the
* message body.
*
* @author Gary Russell
* @since 1.4.2
*/
public class UnzipPostProcessor extends AbstractDecompressingPostProcessor {
public UnzipPostProcessor() {
}
public UnzipPostProcessor(boolean alwaysDecompress) {
super(alwaysDecompress);
}
@Override
protected InputStream getDecompressorStream(InputStream zipped) throws IOException {
ZipInputStream zipper = new ZipInputStream(zipped);
ZipEntry entry = zipper.getNextEntry();
String entryName = entry.getName();
Assert.state("amqp".equals(entryName), () -> "Zip 'entryName' must be 'amqp', not '" + entryName + "'");
return zipper;
}
@Override
protected String getEncoding() {
return "zip";
}
}