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.servlet.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 Jeremy Grelle 031 * @author Rossen Stoyanchev 032 * @since 4.1 033 */ 034public class TransformedResource extends ByteArrayResource { 035 036 @Nullable 037 private final String filename; 038 039 private final long lastModified; 040 041 042 public TransformedResource(Resource original, byte[] transformedContent) { 043 super(transformedContent); 044 this.filename = original.getFilename(); 045 try { 046 this.lastModified = original.lastModified(); 047 } 048 catch (IOException ex) { 049 // should never happen 050 throw new IllegalArgumentException(ex); 051 } 052 } 053 054 055 @Override 056 @Nullable 057 public String getFilename() { 058 return this.filename; 059 } 060 061 @Override 062 public long lastModified() throws IOException { 063 return this.lastModified; 064 } 065 066}