org.springframework.web.multipart.MultipartFileResource 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.web.multipart;
import java.io.IOException;
import java.io.InputStream;
import org.springframework.core.io.AbstractResource;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* Adapt {@link MultipartFile} to {@link org.springframework.core.io.Resource},
* exposing the content as {@code InputStream} and also overriding
* {@link #contentLength()} as well as {@link #getFilename()}.
*
* @author Rossen Stoyanchev
* @since 5.1
*/
class MultipartFileResource extends AbstractResource {
private final MultipartFile multipartFile;
public MultipartFileResource(MultipartFile multipartFile) {
Assert.notNull(multipartFile, "MultipartFile must not be null");
this.multipartFile = multipartFile;
}
/**
* This implementation always returns {@code true}.
*/
@Override
public boolean exists() {
return true;
}
/**
* This implementation always returns {@code true}.
*/
@Override
public boolean isOpen() {
return true;
}
@Override
public long contentLength() {
return this.multipartFile.getSize();
}
@Override
public String getFilename() {
return this.multipartFile.getOriginalFilename();
}
/**
* This implementation throws IllegalStateException if attempting to
* read the underlying stream multiple times.
*/
@Override
public InputStream getInputStream() throws IOException, IllegalStateException {
return this.multipartFile.getInputStream();
}
/**
* This implementation returns a description that has the Multipart name.
*/
@Override
public String getDescription() {
return "MultipartFile resource [" + this.multipartFile.getName() + "]";
}
@Override
public boolean equals(@Nullable Object other) {
return (this == other || (other instanceof MultipartFileResource &&
((MultipartFileResource) other).multipartFile.equals(this.multipartFile)));
}
@Override
public int hashCode() {
return this.multipartFile.hashCode();
}
}