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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed 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 com.android.inputmethod.latin.common;
import java.util.Random;
// Utility methods related with code points used for tests.
public class CodePointUtils {
private CodePointUtils() {
// This utility class is not publicly instantiable.
}
public static final int[] LATIN_ALPHABETS_LOWER = {
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
0x00E0 /* LATIN SMALL LETTER A WITH GRAVE */,
0x00E1 /* LATIN SMALL LETTER A WITH ACUTE */,
0x00E2 /* LATIN SMALL LETTER A WITH CIRCUMFLEX */,
0x00E3 /* LATIN SMALL LETTER A WITH TILDE */,
0x00E4 /* LATIN SMALL LETTER A WITH DIAERESIS */,
0x00E5 /* LATIN SMALL LETTER A WITH RING ABOVE */,
0x00E6 /* LATIN SMALL LETTER AE */,
0x00E7 /* LATIN SMALL LETTER C WITH CEDILLA */,
0x00E8 /* LATIN SMALL LETTER E WITH GRAVE */,
0x00E9 /* LATIN SMALL LETTER E WITH ACUTE */,
0x00EA /* LATIN SMALL LETTER E WITH CIRCUMFLEX */,
0x00EB /* LATIN SMALL LETTER E WITH DIAERESIS */,
0x00EC /* LATIN SMALL LETTER I WITH GRAVE */,
0x00ED /* LATIN SMALL LETTER I WITH ACUTE */,
0x00EE /* LATIN SMALL LETTER I WITH CIRCUMFLEX */,
0x00EF /* LATIN SMALL LETTER I WITH DIAERESIS */,
0x00F0 /* LATIN SMALL LETTER ETH */,
0x00F1 /* LATIN SMALL LETTER N WITH TILDE */,
0x00F2 /* LATIN SMALL LETTER O WITH GRAVE */,
0x00F3 /* LATIN SMALL LETTER O WITH ACUTE */,
0x00F4 /* LATIN SMALL LETTER O WITH CIRCUMFLEX */,
0x00F5 /* LATIN SMALL LETTER O WITH TILDE */,
0x00F6 /* LATIN SMALL LETTER O WITH DIAERESIS */,
0x00F7 /* LATIN SMALL LETTER O WITH STROKE */,
0x00F9 /* LATIN SMALL LETTER U WITH GRAVE */,
0x00FA /* LATIN SMALL LETTER U WITH ACUTE */,
0x00FB /* LATIN SMALL LETTER U WITH CIRCUMFLEX */,
0x00FC /* LATIN SMALL LETTER U WITH DIAERESIS */,
0x00FD /* LATIN SMALL LETTER Y WITH ACUTE */,
0x00FE /* LATIN SMALL LETTER THORN */,
0x00FF /* LATIN SMALL LETTER Y WITH DIAERESIS */
};
public static int[] generateCodePointSet(final int codePointSetSize, final Random random) {
final int[] codePointSet = new int[codePointSetSize];
for (int i = codePointSet.length - 1; i >= 0; ) {
final int r = Math.abs(random.nextInt());
if (r < 0) continue;
// Don't insert 0~0x20, but insert any other code point.
// Code points are in the range 0~0x10FFFF.
final int candidateCodePoint = 0x20 + r % (Character.MAX_CODE_POINT - 0x20);
// Code points between MIN_ and MAX_SURROGATE are not valid on their own.
if (candidateCodePoint >= Character.MIN_SURROGATE
&& candidateCodePoint <= Character.MAX_SURROGATE) continue;
codePointSet[i] = candidateCodePoint;
--i;
}
return codePointSet;
}
/**
* Generates a random word.
*/
public static String generateWord(final Random random, final int[] codePointSet) {
StringBuilder builder = new StringBuilder();
// 8 * 4 = 32 chars max, but we do it the following way so as to bias the random toward
// longer words. This should be closer to natural language, and more importantly, it will
// exercise the algorithms in dicttool much more.
final int count = 1 + (Math.abs(random.nextInt()) % 5)
+ (Math.abs(random.nextInt()) % 5)
+ (Math.abs(random.nextInt()) % 5)
+ (Math.abs(random.nextInt()) % 5)
+ (Math.abs(random.nextInt()) % 5)
+ (Math.abs(random.nextInt()) % 5)
+ (Math.abs(random.nextInt()) % 5)
+ (Math.abs(random.nextInt()) % 5);
while (builder.length() < count) {
builder.appendCodePoint(codePointSet[Math.abs(random.nextInt()) % codePointSet.length]);
}
return builder.toString();
}
}
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