1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.inputmethod.compat; 18 19 import java.lang.reflect.Method; 20 21 public final class CharacterCompat { 22 // Note that Character.isAlphabetic(int), has been introduced in API level 19 23 // (Build.VERSION_CODE.KITKAT). 24 private static final Method METHOD_isAlphabetic = CompatUtils.getMethod( 25 Character.class, "isAlphabetic", int.class); 26 CharacterCompat()27 private CharacterCompat() { 28 // This utility class is not publicly instantiable. 29 } 30 isAlphabetic(final int code)31 public static boolean isAlphabetic(final int code) { 32 if (METHOD_isAlphabetic != null) { 33 return (Boolean)CompatUtils.invoke(null, false, METHOD_isAlphabetic, code); 34 } 35 switch (Character.getType(code)) { 36 case Character.UPPERCASE_LETTER: 37 case Character.LOWERCASE_LETTER: 38 case Character.TITLECASE_LETTER: 39 case Character.MODIFIER_LETTER: 40 case Character.OTHER_LETTER: 41 case Character.LETTER_NUMBER: 42 return true; 43 default: 44 return false; 45 } 46 } 47 } 48