397 }
398 if (formatClassName == null) {
399 throw new IllegalArgumentException("Unsupported format name");
400 }
401 try {
402 final String className = formatClassName;
403 // Try to load from the module of the IIOMetadata implementation
404 // for this plugin since the IIOMetadataImpl is part of the plugin
405 PrivilegedAction<Class<?>> pa = () -> { return getMetadataFormatClass(className); };
406 Class<?> cls = AccessController.doPrivileged(pa);
407 Method meth = cls.getMethod("getInstance");
408 return (IIOMetadataFormat) meth.invoke(null);
409 } catch (Exception e) {
410 RuntimeException ex =
411 new IllegalStateException ("Can't obtain format");
412 ex.initCause(e);
413 throw ex;
414 }
415 }
416
417 private Class<?> getMetadataFormatClass(String formatClassName) {
418 Module thisModule = IIOMetadata.class.getModule();
419 Module targetModule = this.getClass().getModule();
420 Class<?> c = Class.forName(targetModule, formatClassName);
421 if (thisModule.equals(targetModule) || c == null) {
422 return c;
423 }
424 if (thisModule.isNamed()) {
425 int i = formatClassName.lastIndexOf(".");
426 String pn = i > 0 ? formatClassName.substring(0, i) : "";
427 if (!targetModule.isExported(pn, thisModule)) {
428 throw new IllegalStateException("Class " + formatClassName +
429 " in named module must be exported to java.desktop module.");
430 }
431 }
432 return c;
433 }
434
435 /**
436 * Returns an XML DOM {@code Node} object that represents the
437 * root of a tree of metadata contained within this object
438 * according to the conventions defined by a given metadata
439 * format.
440 *
441 * <p> The names of the available metadata formats may be queried
442 * using the {@code getMetadataFormatNames} method.
443 *
444 * @param formatName the desired metadata format.
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397 }
398 if (formatClassName == null) {
399 throw new IllegalArgumentException("Unsupported format name");
400 }
401 try {
402 final String className = formatClassName;
403 // Try to load from the module of the IIOMetadata implementation
404 // for this plugin since the IIOMetadataImpl is part of the plugin
405 PrivilegedAction<Class<?>> pa = () -> { return getMetadataFormatClass(className); };
406 Class<?> cls = AccessController.doPrivileged(pa);
407 Method meth = cls.getMethod("getInstance");
408 return (IIOMetadataFormat) meth.invoke(null);
409 } catch (Exception e) {
410 RuntimeException ex =
411 new IllegalStateException ("Can't obtain format");
412 ex.initCause(e);
413 throw ex;
414 }
415 }
416
417 // If updating this method also see the same in ImageReaderWriterSpi.java
418 private Class<?> getMetadataFormatClass(String formatClassName) {
419 Module thisModule = IIOMetadata.class.getModule();
420 Module targetModule = this.getClass().getModule();
421 Class<?> c = null;
422 try {
423 ClassLoader cl = this.getClass().getClassLoader();
424 c = Class.forName(formatClassName, false, cl);
425 if (!IIOMetadataFormat.class.isAssignableFrom(c)) {
426 return null;
427 }
428 } catch (ClassNotFoundException e) {
429 }
430 if (thisModule.equals(targetModule) || c == null) {
431 return c;
432 }
433 if (targetModule.isNamed()) {
434 int i = formatClassName.lastIndexOf(".");
435 String pn = i > 0 ? formatClassName.substring(0, i) : "";
436 if (!targetModule.isExported(pn, thisModule)) {
437 throw new IllegalStateException("Class " + formatClassName +
438 " in named module must be exported to java.desktop module.");
439 }
440 }
441 return c;
442 }
443
444 /**
445 * Returns an XML DOM {@code Node} object that represents the
446 * root of a tree of metadata contained within this object
447 * according to the conventions defined by a given metadata
448 * format.
449 *
450 * <p> The names of the available metadata formats may be queried
451 * using the {@code getMetadataFormatNames} method.
452 *
453 * @param formatName the desired metadata format.
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