aboutsummaryrefslogtreecommitdiff
path: root/libjava/java/nio/charset/Charset.java
diff options
context:
space:
mode:
Diffstat (limited to 'libjava/java/nio/charset/Charset.java')
-rw-r--r--libjava/java/nio/charset/Charset.java414
1 files changed, 0 insertions, 414 deletions
diff --git a/libjava/java/nio/charset/Charset.java b/libjava/java/nio/charset/Charset.java
deleted file mode 100644
index 04b3819..0000000
--- a/libjava/java/nio/charset/Charset.java
+++ /dev/null
@@ -1,414 +0,0 @@
-/* Charset.java --
- Copyright (C) 2002, 2004, 2005, 2007 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-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;
-import java.io.InputStreamReader;
-import java.net.URL;
-import java.nio.ByteBuffer;
-import java.nio.CharBuffer;
-import java.nio.charset.spi.CharsetProvider;
-import java.util.Collections;
-import java.util.Enumeration;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.LinkedHashSet;
-import java.util.Locale;
-import java.util.Set;
-import java.util.SortedMap;
-import java.util.TreeMap;
-
-/**
- * @author Jesse Rosenstock
- * @since 1.4
- * @status updated to 1.5
- */
-public abstract class Charset implements Comparable<Charset>
-{
- private CharsetEncoder cachedEncoder;
- private CharsetDecoder cachedDecoder;
-
- /**
- * Extra Charset providers.
- */
- private static CharsetProvider[] providers;
-
- private final String canonicalName;
- private final String[] aliases;
-
- protected Charset (String canonicalName, String[] aliases)
- {
- checkName (canonicalName);
- if (aliases != null)
- {
- int n = aliases.length;
- for (int i = 0; i < n; ++i)
- checkName (aliases[i]);
- }
-
- cachedEncoder = null;
- cachedDecoder = null;
- this.canonicalName = canonicalName;
- this.aliases = aliases;
- }
-
- /**
- * @throws IllegalCharsetNameException if the name is illegal
- */
- private static void checkName (String name)
- {
- int n = name.length ();
-
- if (n == 0)
- throw new IllegalCharsetNameException (name);
-
- char ch = name.charAt (0);
- if (!(('A' <= ch && ch <= 'Z')
- || ('a' <= ch && ch <= 'z')
- || ('0' <= ch && ch <= '9')))
- throw new IllegalCharsetNameException (name);
-
- for (int i = 1; i < n; ++i)
- {
- ch = name.charAt (i);
- if (!(('A' <= ch && ch <= 'Z')
- || ('a' <= ch && ch <= 'z')
- || ('0' <= ch && ch <= '9')
- || ch == '-' || ch == '.' || ch == ':' || ch == '_'))
- throw new IllegalCharsetNameException (name);
- }
- }
-
- /**
- * 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;
- }
-
- /**
- * Returns the Charset instance for the charset of the given name.
- *
- * @param charsetName
- * @return the Charset instance for the indicated charset
- * @throws UnsupportedCharsetException if this VM does not support
- * the charset of the given name.
- * @throws IllegalCharsetNameException if the given charset name is
- * legal.
- * @throws IllegalArgumentException if <code>charsetName</code> is null.
- */
- public static Charset forName (String charsetName)
- {
- // Throws IllegalArgumentException as the JDK does.
- if(charsetName == null)
- throw new IllegalArgumentException("Charset name must not be null.");
-
- Charset cs = charsetForName (charsetName);
- if (cs == null)
- throw new UnsupportedCharsetException (charsetName);
- return cs;
- }
-
- /**
- * Retrieves a charset for the given charset name.
- *
- * @return A charset object for the charset with the specified name, or
- * <code>null</code> if no such charset exists.
- *
- * @throws IllegalCharsetNameException if the name is illegal
- */
- private static Charset charsetForName(String charsetName)
- {
- checkName (charsetName);
- // 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)
- {
- CharsetProvider[] providers = providers2();
- for (int i = 0; i < providers.length; i++)
- {
- cs = providers[i].charsetForName(charsetName);
- if (cs != null)
- break;
- }
- }
- return cs;
- }
-
- public static SortedMap<String, Charset> availableCharsets()
- {
- TreeMap<String, Charset> charsets
- = new TreeMap(String.CASE_INSENSITIVE_ORDER);
- for (Iterator<Charset> i = provider().charsets(); i.hasNext(); )
- {
- Charset cs = i.next();
- charsets.put(cs.name(), cs);
- }
-
- CharsetProvider[] providers = providers2();
- for (int j = 0; j < providers.length; j++)
- {
- for (Iterator<Charset> i = providers[j].charsets(); i.hasNext(); )
- {
- Charset cs = (Charset) i.next();
- charsets.put(cs.name(), cs);
- }
- }
-
- return Collections.unmodifiableSortedMap(charsets);
- }
-
- private static CharsetProvider provider()
- {
- try
- {
- String s = System.getProperty("charset.provider");
- if (s != null)
- {
- CharsetProvider p =
- (CharsetProvider) ((Class.forName(s)).newInstance());
- return p;
- }
- }
- catch (Exception e)
- {
- // Ignore.
- }
-
- return Provider.provider();
- }
-
- /**
- * We need to support multiple providers, reading them from
- * java.nio.charset.spi.CharsetProvider in the resource directory
- * META-INF/services. This returns the "extra" charset providers.
- */
- private static CharsetProvider[] providers2()
- {
- if (providers == null)
- {
- try
- {
- Iterator i = ServiceFactory.lookupProviders(CharsetProvider.class);
- LinkedHashSet set = new LinkedHashSet();
- while (i.hasNext())
- set.add(i.next());
-
- providers = new CharsetProvider[set.size()];
- set.toArray(providers);
- }
- catch (Exception e)
- {
- throw new RuntimeException(e);
- }
- }
- return providers;
- }
-
- public final String name ()
- {
- return canonicalName;
- }
-
- public final Set<String> aliases ()
- {
- if (aliases == null)
- return Collections.<String>emptySet();
-
- // should we cache the aliasSet instead?
- int n = aliases.length;
- HashSet<String> aliasSet = new HashSet<String> (n);
- for (int i = 0; i < n; ++i)
- aliasSet.add (aliases[i]);
- return Collections.unmodifiableSet (aliasSet);
- }
-
- public String displayName ()
- {
- return canonicalName;
- }
-
- public String displayName (Locale locale)
- {
- return canonicalName;
- }
-
- public final boolean isRegistered ()
- {
- return (!canonicalName.startsWith ("x-")
- && !canonicalName.startsWith ("X-"));
- }
-
- public abstract boolean contains (Charset cs);
-
- public abstract CharsetDecoder newDecoder ();
-
- public abstract CharsetEncoder newEncoder ();
-
- public boolean canEncode ()
- {
- return true;
- }
-
- // NB: This implementation serializes different threads calling
- // Charset.encode(), a potential performance problem. It might
- // be better to remove the cache, or use ThreadLocal to cache on
- // a per-thread basis.
- public final synchronized ByteBuffer encode (CharBuffer cb)
- {
- try
- {
- if (cachedEncoder == null)
- {
- cachedEncoder = newEncoder ()
- .onMalformedInput (CodingErrorAction.REPLACE)
- .onUnmappableCharacter (CodingErrorAction.REPLACE);
- } else
- cachedEncoder.reset();
- return cachedEncoder.encode (cb);
- }
- catch (CharacterCodingException e)
- {
- throw new AssertionError (e);
- }
- }
-
- public final ByteBuffer encode (String str)
- {
- return encode (CharBuffer.wrap (str));
- }
-
- // NB: This implementation serializes different threads calling
- // Charset.decode(), a potential performance problem. It might
- // be better to remove the cache, or use ThreadLocal to cache on
- // a per-thread basis.
- public final synchronized CharBuffer decode (ByteBuffer bb)
- {
- try
- {
- if (cachedDecoder == null)
- {
- cachedDecoder = newDecoder ()
- .onMalformedInput (CodingErrorAction.REPLACE)
- .onUnmappableCharacter (CodingErrorAction.REPLACE);
- } else
- cachedDecoder.reset();
-
- return cachedDecoder.decode (bb);
- }
- catch (CharacterCodingException e)
- {
- throw new AssertionError (e);
- }
- }
-
- public final int compareTo (Charset other)
- {
- return canonicalName.compareToIgnoreCase (other.canonicalName);
- }
-
- public final int hashCode ()
- {
- return canonicalName.hashCode ();
- }
-
- public final boolean equals (Object ob)
- {
- if (ob instanceof Charset)
- return canonicalName.equalsIgnoreCase (((Charset) ob).canonicalName);
- else
- return false;
- }
-
- public final String toString ()
- {
- return canonicalName;
- }
-}