001package votorola.g.script; // Copyright 2008, Michael Allan. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Votorola Software"), to deal in the Votorola Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Votorola Software, and to permit persons to whom the Votorola Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Votorola Software. THE VOTOROLA SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE VOTOROLA SOFTWARE OR THE USE OR OTHER DEALINGS IN THE VOTOROLA SOFTWARE. 002 003import java.io.*; 004import javax.script.*; 005import votorola.g.lang.*; 006 007 008/** Script engine utilities. 009 */ 010public @ThreadSafe final class ScriptEngineX 011{ 012 013 014 private ScriptEngineX() {} 015 016 017 018 /** Same as engine.{@linkplain ScriptEngine#eval(String) eval}(script), 019 * except that the source of the script is provided as a file. 020 * 021 * @param file script file, encoded in UTF-8 022 * @return the value returned by the script 023 */ 024 public static Object eval( final File file, final ScriptEngine engine ) 025 throws IOException, ScriptException 026 { 027 final BufferedReader reader = new BufferedReader( new InputStreamReader( 028 new FileInputStream( file ), "UTF-8" )); 029 try 030 { 031 engine.put( ScriptEngine.FILENAME, file.getPath() ); // for nicer error messages 032 return engine.eval( reader ); 033 } 034 finally{ reader.close(); } 035 } 036 037 038 039 /** Same as engine.{@linkplain ScriptEngine#eval(String) eval}(script), 040 * except that the source of the script is provided as a file path. 041 * 042 * @param path to UTF-8 encoded script file 043 * (without any shell variable, or tilde ~ in the path string) 044 * @return the value returned by the script 045 */ 046 public static Object eval( String path, ScriptEngine engine ) 047 throws IOException, ScriptException 048 { 049 return eval( new File(path), engine ); 050 } 051 052 053 054}