| /* |
| * 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.codehaus.groovy.control.io; |
| |
| import org.codehaus.groovy.control.CompilerConfiguration; |
| |
| import java.io.BufferedInputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.Reader; |
| import java.net.URI; |
| import java.nio.charset.Charset; |
| |
| /** |
| * A ReaderSource for source files. |
| */ |
| public class FileReaderSource extends AbstractReaderSource { |
| private final File file; // The File from which we produce Readers. |
| private final Charset UTF8 = Charset.forName("UTF-8"); |
| |
| /** |
| * Creates the ReaderSource from a File descriptor. |
| * @param file script source file |
| * @param configuration configuration for compiling source |
| */ |
| public FileReaderSource( File file, CompilerConfiguration configuration ) { |
| super( configuration ); |
| this.file = file; |
| } |
| |
| public File getFile() { |
| return file; |
| } |
| |
| /** |
| * Returns a new Reader on the underlying source object. |
| */ |
| public Reader getReader() throws IOException { |
| // we want to remove the BOM windows adds from a file if the encoding is UTF-8 |
| // in other cases we depend on the charsets |
| Charset cs = Charset.forName(configuration.getSourceEncoding()); |
| InputStream in = new BufferedInputStream(new FileInputStream(file)); |
| if (UTF8.name().equalsIgnoreCase(cs.name())) { |
| in.mark(3); |
| boolean hasBOM = true; |
| try { |
| int i = in.read(); |
| hasBOM &= i == 0xEF; |
| i = in.read(); |
| hasBOM &= i == 0xBB; |
| i = in.read(); |
| hasBOM &= i == 0xFF; |
| } catch (IOException ioe) { |
| hasBOM= false; |
| } |
| if (!hasBOM) in.reset(); |
| } |
| return new InputStreamReader( in, cs ); |
| } |
| |
| /** |
| * Returns a URI for the file of this source. |
| * |
| * @return URI for the file of this source. |
| */ |
| public URI getURI() { |
| return file.toURI(); |
| } |
| |
| } |