org.springframework.core.codec.DataBufferDecoder Maven / Gradle / Ivy
/*
* Copyright 2002-2018 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.core.codec;
import java.util.Map;
import org.reactivestreams.Publisher;
import reactor.core.publisher.Flux;
import org.springframework.core.ResolvableType;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.lang.Nullable;
import org.springframework.util.MimeType;
import org.springframework.util.MimeTypeUtils;
/**
* Simple pass-through decoder for {@link DataBuffer}s.
* Note that the "decoded" buffers returned by instances of this class should
* be released after usage by calling
* {@link org.springframework.core.io.buffer.DataBufferUtils#release(DataBuffer)}.
*
* @author Arjen Poutsma
* @author Rossen Stoyanchev
* @since 5.0
*/
public class DataBufferDecoder extends AbstractDataBufferDecoder {
public DataBufferDecoder() {
super(MimeTypeUtils.ALL);
}
@Override
public boolean canDecode(ResolvableType elementType, @Nullable MimeType mimeType) {
Class clazz = elementType.getRawClass();
return (clazz != null && DataBuffer.class.isAssignableFrom(clazz) && super.canDecode(elementType, mimeType));
}
@Override
public Flux decode(Publisher inputStream, ResolvableType elementType,
@Nullable MimeType mimeType, @Nullable Map hints) {
return Flux.from(inputStream);
}
@Override
protected DataBuffer decodeDataBuffer(DataBuffer buffer, ResolvableType elementType,
@Nullable MimeType mimeType, @Nullable Map hints) {
return buffer;
}
}