| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 |
| * |
| * http://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.apache.royale.compiler.internal.filespecs; |
| |
| import static org.apache.royale.compiler.filespecs.CombinedFile.getBOM; |
| |
| import java.io.BufferedInputStream; |
| import java.io.BufferedReader; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.Reader; |
| |
| import org.apache.royale.compiler.filespecs.IBinaryFileSpecification; |
| import org.apache.royale.compiler.filespecs.CombinedFile.BOM; |
| import org.apache.royale.swc.ISWCFileEntry; |
| |
| /** |
| * A SWCFileSpecification allows us to attach read a file from a SWC. This allows us to treat the SWC as one FileSpec |
| */ |
| public class SWCFileSpecification implements IBinaryFileSpecification |
| { |
| /** |
| * @param path Filename contained within the manifest. |
| * @param fileEntry ISWCFileEntry within the SWC. May be null if |
| * the file does not exist within the SWC. FileNotFound exception |
| * will be thrown if this IFileSpecification is read |
| */ |
| public SWCFileSpecification(String path, ISWCFileEntry fileEntry) |
| { |
| assert (fileEntry == null || fileEntry.getPath().equals(path)) : "fileEntry path must equal specified path"; |
| |
| this.path = path; |
| this.fileEntry = fileEntry; |
| } |
| |
| private final String path; |
| private final ISWCFileEntry fileEntry; |
| |
| @Override |
| public String getPath() |
| { |
| return path; |
| } |
| |
| @Override |
| public Reader createReader() throws FileNotFoundException |
| { |
| if (fileEntry == null) |
| throw new FileNotFoundException(path); |
| |
| try |
| { |
| return createNIOReader(); |
| } |
| catch (FileNotFoundException e) |
| { |
| throw e; |
| } |
| catch (final IOException e) |
| { |
| // could not open the file, but the file seems to exist. |
| // we can either return null, or maybe a reader that pretends |
| // the file is empty or throws an IOException as soon as you try to read |
| // from it. |
| |
| // We'll return a Reader that just throws the above IOException when |
| // someone tries to read some characters. |
| return new Reader() |
| { |
| @Override |
| public int read(char[] cbuf, int off, int len) throws IOException |
| { |
| throw e; |
| } |
| |
| @Override |
| public void close() throws IOException |
| { |
| } |
| }; |
| } |
| } |
| |
| @Override |
| public long getLastModified() |
| { |
| if (fileEntry == null) |
| return Long.MAX_VALUE - 1; |
| |
| return fileEntry.getLastModified(); |
| } |
| |
| @Override |
| public boolean isOpenDocument() |
| { |
| return false; |
| } |
| |
| @Override |
| public InputStream createInputStream() throws IOException |
| { |
| if (fileEntry == null) |
| throw new FileNotFoundException(path); |
| |
| return fileEntry.createInputStream(); |
| } |
| |
| private Reader createNIOReader() throws IOException |
| { |
| InputStream strm = createInputStream(); |
| BufferedInputStream bufferedStrm; |
| if (strm instanceof BufferedInputStream) |
| bufferedStrm = (BufferedInputStream)strm; |
| else |
| bufferedStrm = new BufferedInputStream(strm); |
| |
| // Skip BOM header. |
| final BOM bom = getBOM(bufferedStrm); |
| bufferedStrm.skip(bom.pattern.length); |
| |
| return new BufferedReader(new InputStreamReader(bufferedStrm, bom.charset)); |
| } |
| } |