mirror of git://gcc.gnu.org/git/gcc.git
97 lines
3.7 KiB
Java
97 lines
3.7 KiB
Java
/* CharsetProvider.java -- charset service provider interface
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Copyright (C) 2002, 2006, 2007 Free Software Foundation
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.nio.charset.spi;
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import java.nio.charset.Charset;
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import java.util.Iterator;
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/**
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* This class allows an implementor to provide additional character sets. The
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* subclass must have a nullary constructor, and be attached to charset
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* implementation classes. These extensions are loaded via the context class
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* loader. To provide the charset extension, all files named
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* <code>META-INF/services/java.nio.charset.spi.CharsetProvider</code> are
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* read from the classpath. Each one should be a UTF-8 encoded list of
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* fully-qualified names of concrete subclasses of this class; whitespace is
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* ignored, and '#' starts comments. Duplicates are ignored. The
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* implementations must be accessible to the classloader that requests them.
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*
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* @author Eric Blake (ebb9@email.byu.edu)
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* @see Charset
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* @since 1.4
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* @status updated to 1.4
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*/
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public abstract class CharsetProvider
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{
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/**
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* Initialize a new charset provider. This performs a security check on
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* RuntimePermission("charsetProvider").
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*
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* @throws SecurityException if building a new set is not allowed
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*/
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protected CharsetProvider()
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{
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// We only do the security check for custom providers, not for the
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// built in ones.
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SecurityManager s = System.getSecurityManager();
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if (s != null &&
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! (this instanceof gnu.java.nio.charset.Provider))
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// GCJ LOCAL - We have the iconv provider in standard.omit
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// || this instanceof gnu.java.nio.charset.iconv.IconvProvider))
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s.checkPermission(new RuntimePermission("charsetProvider"));
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}
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/**
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* Returns an iterator over the charsets defined by this provider.
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*
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* @return the iterator
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* @see Charset#availableCharsets()
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*/
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public abstract Iterator<Charset> charsets();
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/**
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* Returns the named charset, by canonical name or alias.
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*
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* @param name the name of the character
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*
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* @return the charset, or null if not supported
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*/
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public abstract Charset charsetForName(String name);
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} // class CharsetProvider
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