diff options
Diffstat (limited to 'libjava/java/nio/charset/Charset.java')
-rw-r--r-- | libjava/java/nio/charset/Charset.java | 94 |
1 files changed, 70 insertions, 24 deletions
diff --git a/libjava/java/nio/charset/Charset.java b/libjava/java/nio/charset/Charset.java index 14b6db83b0f..48093bc9d3d 100644 --- a/libjava/java/nio/charset/Charset.java +++ b/libjava/java/nio/charset/Charset.java @@ -38,6 +38,8 @@ exception statement from your version. */ package java.nio.charset; +import gnu.classpath.ServiceFactory; +import gnu.classpath.SystemProperties; import gnu.java.nio.charset.Provider; import java.io.BufferedReader; @@ -116,6 +118,53 @@ public abstract class Charset implements Comparable } } + /** + * Returns the system default charset. + * + * This may be set by the user or VM with the file.encoding + * property. + * + * @since 1.5 + */ + public static Charset defaultCharset() + { + String encoding; + + try + { + encoding = SystemProperties.getProperty("file.encoding"); + } + catch(SecurityException e) + { + // Use fallback. + encoding = "ISO-8859-1"; + } + catch(IllegalArgumentException e) + { + // Use fallback. + encoding = "ISO-8859-1"; + } + + try + { + return forName(encoding); + } + catch(UnsupportedCharsetException e) + { + // Ignore. + } + catch(IllegalCharsetNameException e) + { + // Ignore. + } + catch(IllegalArgumentException e) + { + // Ignore. + } + + throw new IllegalStateException("Can't get default charset!"); + } + public static boolean isSupported (String charsetName) { return charsetForName (charsetName) != null; @@ -155,13 +204,19 @@ public abstract class Charset implements Comparable private static Charset charsetForName(String charsetName) { checkName (charsetName); - Charset cs = null; - CharsetProvider[] providers = providers2(); - for (int i = 0; i < providers.length; i++) + // Try the default provider first + // (so we don't need to load external providers unless really necessary) + // if it is an exotic charset try loading the external providers. + Charset cs = provider().charsetForName(charsetName); + if (cs == null) { - cs = providers[i].charsetForName(charsetName); - if (cs != null) - break; + CharsetProvider[] providers = providers2(); + for (int i = 0; i < providers.length; i++) + { + cs = providers[i].charsetForName(charsetName); + if (cs != null) + break; + } } return cs; } @@ -169,6 +224,11 @@ public abstract class Charset implements Comparable public static SortedMap availableCharsets() { TreeMap charsets = new TreeMap(String.CASE_INSENSITIVE_ORDER); + for (Iterator i = provider().charsets(); i.hasNext(); ) + { + Charset cs = (Charset) i.next(); + charsets.put(cs.name(), cs); + } CharsetProvider[] providers = providers2(); for (int j = 0; j < providers.length; j++) @@ -206,7 +266,7 @@ public abstract class Charset implements Comparable /** * We need to support multiple providers, reading them from * java.nio.charset.spi.CharsetProvider in the resource directory - * META-INF/services. + * META-INF/services. This returns the "extra" charset providers. */ private static CharsetProvider[] providers2() { @@ -214,24 +274,10 @@ public abstract class Charset implements Comparable { try { - Enumeration en = ClassLoader.getSystemResources - ("META-INF/services/java.nio.charset.spi.CharsetProvider"); + Iterator i = ServiceFactory.lookupProviders(CharsetProvider.class); LinkedHashSet set = new LinkedHashSet(); - set.add(provider()); - while (en.hasMoreElements()) - { - BufferedReader rdr = new BufferedReader(new InputStreamReader - (((URL) (en.nextElement())).openStream())); - while (true) - { - String s = rdr.readLine(); - if (s == null) - break; - CharsetProvider p = - (CharsetProvider) ((Class.forName(s)).newInstance()); - set.add(p); - } - } + while (i.hasNext()) + set.add(i.next()); providers = new CharsetProvider[set.size()]; set.toArray(providers); |