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comparison core/src/luan/modules/IoLuan.java @ 265:454a486d9c19

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allow IO on files that don't exist git-svn-id: https://luan-java.googlecode.com/svn/trunk@266 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Wed, 29 Oct 2014 16:26:42 +0000
parents 9e0d4452e649
children 1507149fc447
comparison
equal deleted inserted replaced
264:9e0d4452e649 265:454a486d9c19
16 import java.io.OutputStreamWriter; 16 import java.io.OutputStreamWriter;
17 import java.io.ByteArrayInputStream; 17 import java.io.ByteArrayInputStream;
18 import java.io.DataInputStream; 18 import java.io.DataInputStream;
19 import java.io.DataOutputStream; 19 import java.io.DataOutputStream;
20 import java.io.IOException; 20 import java.io.IOException;
21 import java.io.FileNotFoundException;
21 import java.net.URL; 22 import java.net.URL;
22 import java.net.Socket; 23 import java.net.Socket;
23 import java.net.ServerSocket; 24 import java.net.ServerSocket;
24 import java.net.MalformedURLException; 25 import java.net.MalformedURLException;
25 import java.util.List; 26 import java.util.List;
208 209
209 public LuanFunction loader(LuanState luan,String name) throws LuanException { 210 public LuanFunction loader(LuanState luan,String name) throws LuanException {
210 try { 211 try {
211 String src = read_text(); 212 String src = read_text();
212 return BasicLuan.load(luan,src,name,null,false); 213 return BasicLuan.load(luan,src,name,null,false);
214 } catch(FileNotFoundException e) {
215 return null;
213 } catch(IOException e) { 216 } catch(IOException e) {
214 throw luan.exception(e); 217 throw luan.exception(e);
218 }
219 }
220
221 public boolean exists() throws IOException {
222 try {
223 inputStream().close();
224 return true;
225 } catch(FileNotFoundException e) {
226 return false;
215 } 227 }
216 } 228 }
217 229
218 LuanTable table() { 230 LuanTable table() {
219 LuanTable tbl = Luan.newTable(); 231 LuanTable tbl = Luan.newTable();
234 LuanIn.class.getMethod( "read_blocks", Integer.class ), this 246 LuanIn.class.getMethod( "read_blocks", Integer.class ), this
235 ) ); 247 ) );
236 tbl.put( "loader", new LuanJavaFunction( 248 tbl.put( "loader", new LuanJavaFunction(
237 LuanIn.class.getMethod( "loader", LuanState.class, String.class ), this 249 LuanIn.class.getMethod( "loader", LuanState.class, String.class ), this
238 ) ); 250 ) );
251 tbl.put( "exists", new LuanJavaFunction(
252 LuanIn.class.getMethod( "exists" ), this
253 ) );
239 } catch(NoSuchMethodException e) { 254 } catch(NoSuchMethodException e) {
240 throw new RuntimeException(e); 255 throw new RuntimeException(e);
241 } 256 }
242 return tbl; 257 return tbl;
243 } 258 }
257 return Utils.readAll(new InputStreamReader(System.in)); 272 return Utils.readAll(new InputStreamReader(System.in));
258 } 273 }
259 274
260 @Override public byte[] read_binary() throws IOException { 275 @Override public byte[] read_binary() throws IOException {
261 return Utils.readAll(System.in); 276 return Utils.readAll(System.in);
277 }
278
279 @Override public boolean exists() {
280 return true;
262 } 281 }
263 }; 282 };
264 283
265 public static abstract class LuanIO extends LuanIn { 284 public static abstract class LuanIO extends LuanIn {
266 abstract OutputStream outputStream() throws IOException; 285 abstract OutputStream outputStream() throws IOException;
363 list.add(new LuanFile(luan,f).table()); 382 list.add(new LuanFile(luan,f).table());
364 } 383 }
365 return list; 384 return list;
366 } 385 }
367 386
368 public boolean exists() { 387 @Override public boolean exists() {
369 return file.exists(); 388 return file.exists();
370 } 389 }
371 390
372 @Override LuanTable table() { 391 @Override LuanTable table() {
373 LuanTable tbl = super.table(); 392 LuanTable tbl = super.table();
374 try { 393 try {
375 tbl.put( "name", new LuanJavaFunction( 394 tbl.put( "name", new LuanJavaFunction(
376 File.class.getMethod( "getName" ), file 395 File.class.getMethod( "getName" ), file
377 ) ); 396 ) );
378 tbl.put( "exists", new LuanJavaFunction(
379 LuanFile.class.getMethod( "exists" ), this
380 ) );
381 tbl.put( "is_directory", new LuanJavaFunction( 397 tbl.put( "is_directory", new LuanJavaFunction(
382 File.class.getMethod( "isDirectory" ), file 398 File.class.getMethod( "isDirectory" ), file
383 ) ); 399 ) );
384 tbl.put( "is_file", new LuanJavaFunction( 400 tbl.put( "is_file", new LuanJavaFunction(
385 File.class.getMethod( "isFile" ), file 401 File.class.getMethod( "isFile" ), file
411 427
412 public static LuanTable file(LuanState luan,String name,Boolean loading) throws LuanException { 428 public static LuanTable file(LuanState luan,String name,Boolean loading) throws LuanException {
413 if( Boolean.TRUE.equals(loading) ) 429 if( Boolean.TRUE.equals(loading) )
414 name += ".luan"; 430 name += ".luan";
415 File file = new File(name); 431 File file = new File(name);
416 if( !file.exists() )
417 return null;
418 return new LuanFile(file).table(); 432 return new LuanFile(file).table();
419 } 433 }
420 434
421 public static LuanTable classpath(LuanState luan,String name,Boolean loading) throws LuanException { 435 public static LuanTable classpath(LuanState luan,String name,Boolean loading) throws LuanException {
422 if( name.contains("//") ) 436 if( name.contains("//") )
502 516
503 public static LuanTable luan(LuanState luan,String path,Boolean loading) throws LuanException { 517 public static LuanTable luan(LuanState luan,String path,Boolean loading) throws LuanException {
504 return classpath( luan, "luan/modules/" + path, loading ); 518 return classpath( luan, "luan/modules/" + path, loading );
505 } 519 }
506 520
521 public static LuanTable stdin(LuanState luan) throws LuanException {
522 LuanTable io = (LuanTable)PackageLuan.loaded(luan).get("luan:Io");
523 return (LuanTable)io.get("stdin");
524 }
525
507 private static LuanTable newProtocols() { 526 private static LuanTable newProtocols() {
508 LuanTable protocols = Luan.newTable(); 527 LuanTable protocols = Luan.newTable();
509 try { 528 try {
510 add( protocols, "file", LuanState.class, String.class, Boolean.class ); 529 add( protocols, "file", LuanState.class, String.class, Boolean.class );
511 add( protocols, "classpath", LuanState.class, String.class, Boolean.class ); 530 add( protocols, "classpath", LuanState.class, String.class, Boolean.class );
514 add( protocols, "https", String.class, Boolean.class ); 533 add( protocols, "https", String.class, Boolean.class );
515 protocols.put( "class", new LuanJavaFunction( 534 protocols.put( "class", new LuanJavaFunction(
516 IoLuan.class.getMethod( "_class", LuanState.class, String.class, Boolean.class ), null 535 IoLuan.class.getMethod( "_class", LuanState.class, String.class, Boolean.class ), null
517 ) ); 536 ) );
518 add( protocols, "luan", LuanState.class, String.class, Boolean.class ); 537 add( protocols, "luan", LuanState.class, String.class, Boolean.class );
538 add( protocols, "stdin", LuanState.class );
519 } catch(NoSuchMethodException e) { 539 } catch(NoSuchMethodException e) {
520 throw new RuntimeException(e); 540 throw new RuntimeException(e);
521 } 541 }
522 return protocols; 542 return protocols;
523 } 543 }