001/*
002 * Copyright 2002-2018 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.web.reactive.resource;
018
019import java.io.IOException;
020
021import org.springframework.core.io.ByteArrayResource;
022import org.springframework.core.io.Resource;
023import org.springframework.lang.Nullable;
024
025/**
026 * An extension of {@link ByteArrayResource} that a {@link ResourceTransformer}
027 * can use to represent an original resource preserving all other information
028 * except the content.
029 *
030 * @author Rossen Stoyanchev
031 * @since 5.0
032 */
033public class TransformedResource extends ByteArrayResource {
034
035        @Nullable
036        private final String filename;
037
038        private final long lastModified;
039
040
041        public TransformedResource(Resource original, byte[] transformedContent) {
042                super(transformedContent);
043                this.filename = original.getFilename();
044                try {
045                        this.lastModified = original.lastModified();
046                }
047                catch (IOException ex) {
048                        // should never happen
049                        throw new IllegalArgumentException(ex);
050                }
051        }
052
053
054        @Override
055        @Nullable
056        public String getFilename() {
057                return this.filename;
058        }
059
060        @Override
061        public long lastModified() {
062                return this.lastModified;
063        }
064
065}