1 /* 2 * Copyright (C) 2013 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.latin.common; 18 19 import com.android.inputmethod.annotations.UsedForTesting; 20 21 import java.util.Random; 22 23 import javax.annotation.Nonnull; 24 25 // Utility methods related with code points used for tests. 26 // TODO: Figure out where this class should be. 27 @UsedForTesting 28 public class CodePointUtils { 29 private CodePointUtils() { 30 // This utility class is not publicly instantiable. 31 } 32 33 public static final int[] LATIN_ALPHABETS_LOWER = { 34 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 35 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 36 0x00E0 /* LATIN SMALL LETTER A WITH GRAVE */, 37 0x00E1 /* LATIN SMALL LETTER A WITH ACUTE */, 38 0x00E2 /* LATIN SMALL LETTER A WITH CIRCUMFLEX */, 39 0x00E3 /* LATIN SMALL LETTER A WITH TILDE */, 40 0x00E4 /* LATIN SMALL LETTER A WITH DIAERESIS */, 41 0x00E5 /* LATIN SMALL LETTER A WITH RING ABOVE */, 42 0x00E6 /* LATIN SMALL LETTER AE */, 43 0x00E7 /* LATIN SMALL LETTER C WITH CEDILLA */, 44 0x00E8 /* LATIN SMALL LETTER E WITH GRAVE */, 45 0x00E9 /* LATIN SMALL LETTER E WITH ACUTE */, 46 0x00EA /* LATIN SMALL LETTER E WITH CIRCUMFLEX */, 47 0x00EB /* LATIN SMALL LETTER E WITH DIAERESIS */, 48 0x00EC /* LATIN SMALL LETTER I WITH GRAVE */, 49 0x00ED /* LATIN SMALL LETTER I WITH ACUTE */, 50 0x00EE /* LATIN SMALL LETTER I WITH CIRCUMFLEX */, 51 0x00EF /* LATIN SMALL LETTER I WITH DIAERESIS */, 52 0x00F0 /* LATIN SMALL LETTER ETH */, 53 0x00F1 /* LATIN SMALL LETTER N WITH TILDE */, 54 0x00F2 /* LATIN SMALL LETTER O WITH GRAVE */, 55 0x00F3 /* LATIN SMALL LETTER O WITH ACUTE */, 56 0x00F4 /* LATIN SMALL LETTER O WITH CIRCUMFLEX */, 57 0x00F5 /* LATIN SMALL LETTER O WITH TILDE */, 58 0x00F6 /* LATIN SMALL LETTER O WITH DIAERESIS */, 59 0x00F7 /* LATIN SMALL LETTER O WITH STROKE */, 60 0x00F9 /* LATIN SMALL LETTER U WITH GRAVE */, 61 0x00FA /* LATIN SMALL LETTER U WITH ACUTE */, 62 0x00FB /* LATIN SMALL LETTER U WITH CIRCUMFLEX */, 63 0x00FC /* LATIN SMALL LETTER U WITH DIAERESIS */, 64 0x00FD /* LATIN SMALL LETTER Y WITH ACUTE */, 65 0x00FE /* LATIN SMALL LETTER THORN */, 66 0x00FF /* LATIN SMALL LETTER Y WITH DIAERESIS */ 67 }; 68 69 @UsedForTesting 70 @Nonnull 71 public static int[] generateCodePointSet(final int codePointSetSize, 72 @Nonnull final Random random) { 73 final int[] codePointSet = new int[codePointSetSize]; 74 for (int i = codePointSet.length - 1; i >= 0; ) { 75 final int r = Math.abs(random.nextInt()); 76 if (r < 0) { 77 continue; 78 } 79 // Don't insert 0~0x20, but insert any other code point. 80 // Code points are in the range 0~0x10FFFF. 81 final int candidateCodePoint = 0x20 + r % (Character.MAX_CODE_POINT - 0x20); 82 // Code points between MIN_ and MAX_SURROGATE are not valid on their own. 83 if (candidateCodePoint >= Character.MIN_SURROGATE 84 && candidateCodePoint <= Character.MAX_SURROGATE) { 85 continue; 86 } 87 codePointSet[i] = candidateCodePoint; 88 --i; 89 } 90 return codePointSet; 91 } 92 93 /** 94 * Generates a random word. 95 */ 96 @UsedForTesting 97 @Nonnull 98 public static String generateWord(@Nonnull final Random random, 99 @Nonnull final int[] codePointSet) { 100 final StringBuilder builder = new StringBuilder(); 101 // 8 * 4 = 32 chars max, but we do it the following way so as to bias the random toward 102 // longer words. This should be closer to natural language, and more importantly, it will 103 // exercise the algorithms in dicttool much more. 104 final int count = 1 + (Math.abs(random.nextInt()) % 5) 105 + (Math.abs(random.nextInt()) % 5) 106 + (Math.abs(random.nextInt()) % 5) 107 + (Math.abs(random.nextInt()) % 5) 108 + (Math.abs(random.nextInt()) % 5) 109 + (Math.abs(random.nextInt()) % 5) 110 + (Math.abs(random.nextInt()) % 5) 111 + (Math.abs(random.nextInt()) % 5); 112 while (builder.length() < count) { 113 builder.appendCodePoint(codePointSet[Math.abs(random.nextInt()) % codePointSet.length]); 114 } 115 return builder.toString(); 116 } 117 } 118
