| /* 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.net; |
| |
| import libcore.icu.NativeIDN; |
| |
| /** |
| * Converts internationalized domain names between Unicode and the ASCII Compatible Encoding |
| * (ACE) representation. |
| * |
| * <p>See <a href="http://www.ietf.org/rfc/rfc3490.txt">RFC 3490</a> for full details. |
| * |
| * @since 1.6 |
| */ |
| public final class IDN { |
| /** |
| * When set, allows IDN to process unassigned unicode points. |
| */ |
| public static final int ALLOW_UNASSIGNED = 1; |
| |
| /** |
| * When set, ASCII strings are checked against |
| * <a href="http://www.ietf.org/rfc/rfc1122.txt">RFC 1122</a> and |
| * <a href="http://www.ietf.org/rfc/rfc1123.txt">RFC 1123</a>. |
| */ |
| public static final int USE_STD3_ASCII_RULES = 2; |
| |
| private IDN() { |
| } |
| |
| /** |
| * Transform a Unicode String to ASCII Compatible Encoding String according |
| * to the algorithm defined in <a href="http://www.ietf.org/rfc/rfc3490.txt">RFC 3490</a>. |
| * |
| * <p>If the transformation fails (because the input is not a valid IDN), an |
| * exception will be thrown. |
| * |
| * <p>This method can handle either an individual label or an entire domain name. |
| * In the latter case, the separators are: U+002E (full stop), U+3002 (ideographic full stop), |
| * U+FF0E (fullwidth full stop), and U+FF61 (halfwidth ideographic full stop). |
| * All of these will become U+002E (full stop) in the result. |
| * |
| * @param input the Unicode name |
| * @param flags 0, {@code ALLOW_UNASSIGNED}, {@code USE_STD3_ASCII_RULES}, |
| * or {@code ALLOW_UNASSIGNED | USE_STD3_ASCII_RULES} |
| * @return the ACE name |
| * @throws IllegalArgumentException if {@code input} does not conform to <a href="http://www.ietf.org/rfc/rfc3490.txt">RFC 3490</a> |
| */ |
| public static String toASCII(String input, int flags) { |
| return NativeIDN.toASCII(input, flags); |
| } |
| |
| /** |
| * Equivalent to {@code toASCII(input, 0)}. |
| * |
| * @param input the Unicode name |
| * @return the ACE name |
| * @throws IllegalArgumentException if {@code input} does not conform to <a href="http://www.ietf.org/rfc/rfc3490.txt">RFC 3490</a> |
| */ |
| public static String toASCII(String input) { |
| return toASCII(input, 0); |
| } |
| |
| /** |
| * Translates a string from ASCII Compatible Encoding (ACE) to Unicode |
| * according to the algorithm defined in <a href="http://www.ietf.org/rfc/rfc3490.txt">RFC 3490</a>. |
| * |
| * <p>Unlike {@code toASCII}, this transformation cannot fail. |
| * |
| * <p>This method can handle either an individual label or an entire domain name. |
| * In the latter case, the separators are: U+002E (full stop), U+3002 (ideographic full stop), |
| * U+FF0E (fullwidth full stop), and U+FF61 (halfwidth ideographic full stop). |
| * |
| * @param input the ACE name |
| * @return the Unicode name |
| * @param flags 0, {@code ALLOW_UNASSIGNED}, {@code USE_STD3_ASCII_RULES}, |
| * or {@code ALLOW_UNASSIGNED | USE_STD3_ASCII_RULES} |
| */ |
| public static String toUnicode(String input, int flags) { |
| return NativeIDN.toUnicode(input, flags); |
| } |
| |
| /** |
| * Equivalent to {@code toUnicode(input, 0)}. |
| * |
| * @param input the ACE name |
| * @return the Unicode name |
| */ |
| public static String toUnicode(String input) { |
| return NativeIDN.toUnicode(input, 0); |
| } |
| } |