org.springframework.web.servlet.resource.TransformedResource 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.servlet.resource;
import java.io.IOException;
import org.springframework.core.io.ByteArrayResource;
import org.springframework.core.io.Resource;
import org.springframework.lang.Nullable;
/**
* An extension of {@link ByteArrayResource} that a {@link ResourceTransformer}
* can use to represent an original resource preserving all other information
* except the content.
*
* @author Jeremy Grelle
* @author Rossen Stoyanchev
* @since 4.1
*/
public class TransformedResource extends ByteArrayResource {
@Nullable
private final String filename;
private final long lastModified;
public TransformedResource(Resource original, byte[] transformedContent) {
super(transformedContent);
this.filename = original.getFilename();
try {
this.lastModified = original.lastModified();
}
catch (IOException ex) {
// should never happen
throw new IllegalArgumentException(ex);
}
}
@Override
@Nullable
public String getFilename() {
return this.filename;
}
@Override
public long lastModified() throws IOException {
return this.lastModified;
}
}