| /* Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package java.nio.charset.spi; |
| |
| import java.nio.charset.Charset; |
| import java.util.Iterator; |
| |
| /** |
| * The service provider class for character sets. |
| */ |
| public abstract class CharsetProvider { |
| |
| // The permission required to construct a new provider. |
| private static final RuntimePermission CONSTRUCT_PERM = new RuntimePermission( |
| "charsetProvider"); |
| |
| /** |
| * Constructor for subclassing with concrete types. |
| * |
| * @throws SecurityException |
| * if there is a security manager installed that does not permit |
| * the runtime permission labeled "charsetProvider". |
| */ |
| protected CharsetProvider() { |
| SecurityManager securityManager = System.getSecurityManager(); |
| if (securityManager != null) |
| securityManager.checkPermission(CONSTRUCT_PERM); |
| } |
| |
| /** |
| * Returns an iterator over all the available charsets. |
| * |
| * @return the iterator. |
| */ |
| public abstract Iterator<Charset> charsets(); |
| |
| /** |
| * Returns the named charset. |
| * <p> |
| * If the charset is unavailable the method returns <code>null</code>. |
| * </p> |
| * |
| * @param charsetName |
| * the canonical or alias name of a character set. |
| * @return the charset, or <code>null</code> if unavailable. |
| */ |
| public abstract Charset charsetForName(String charsetName); |
| } |