001/*
002 * Copyright 2002-2015 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.servlet.resource;
018
019import java.io.IOException;
020
021import org.springframework.core.io.ByteArrayResource;
022import org.springframework.core.io.Resource;
023
024/**
025 * An extension of {@link org.springframework.core.io.ByteArrayResource}
026 * that a {@link ResourceTransformer} can use to represent an original
027 * resource preserving all other information except the content.
028 *
029 * @author Jeremy Grelle
030 * @author Rossen Stoyanchev
031 * @since 4.1
032 */
033public class TransformedResource extends ByteArrayResource {
034
035        private final String filename;
036
037        private final long lastModified;
038
039
040        public TransformedResource(Resource original, byte[] transformedContent) {
041                super(transformedContent);
042                this.filename = original.getFilename();
043                try {
044                        this.lastModified = original.lastModified();
045                }
046                catch (IOException ex) {
047                        // should never happen
048                        throw new IllegalArgumentException(ex);
049                }
050        }
051
052
053        @Override
054        public String getFilename() {
055                return this.filename;
056        }
057
058        @Override
059        public long lastModified() throws IOException {
060                return this.lastModified;
061        }
062
063}