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/*
* 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 bjc.inflexion;
import java.util.regex.Pattern;
/**
* General utils for dealing with english.
*
* @author student
*/
public class EnglishUtils {
private static String[] smallNums = new String[] {
"zero", "one", "two", "three", "four", "five", "six", "seven",
"eight", "nine", "ten" };
private static String[] summaryNums = new String[] { "no", "one", "a couple of", "a few", "several" };
private static int[] summaryMap = new int[] {
/* no */
0,
/* one */
1,
/* a couple of */
2,
/* a few */
3, 3, 3,
/* several */
4, 4, 4, 4
};
/**
* Convert small integers to words.
*
* @param num
* The number to convert.
*
* @return
* The word for the number, if it's less than ten.
*/
public static String smallIntToWord(final int num) {
if (num >= 0 && num <= 10) return smallNums[num];
return Integer.toString(num);
}
/**
* Summarize an integer.
*
* @param num
* The number to summarize.
*
* @param atEnd
* Whether or not the integer is at the end of a string.
*
* @return
* A string summarizing the integer.
*/
public static String intSummarize(final int num, final boolean atEnd) {
if (num >= 0 && num < 10) return summaryNums[summaryMap[num]];
return "many";
}
private static Pattern AN_ORD = Pattern.compile("(?i)\\A[aefhilmnorsx]-?th\\Z");
private static Pattern A_ORD = Pattern.compile("(?i)\\A[bcdgjkpqtuvwyz]-?th\\Z");
private static Pattern EXP_AN = Pattern.compile("(?i)\\A(?:euler|hour(?!i)|heir|honest|hono)");
private static Pattern SIN_AN = Pattern.compile("(?i)\\A[aefhilmnorst]\\Z");
private static Pattern SIN_A = Pattern.compile("(?i)\\A[bcdgjkpqtuvwyz]\\Z");
private static Pattern ABBREV_AN = Pattern.compile("\\A(?!FJO|[HLMNS]Y|RY[EQ]|SQU|(F[LR]?|[HL]|MN?|N|RH?|S[CHKLMNPTVW]?|X(YL)?)[AEIOU])[FHLMNRSX][A-Z]");
private static Pattern IN_Y_AN = Pattern.compile("(?i)\\Ay(?:b[lor]|cl[ea]|fere|gg|p[ios]|rou|tt)");
private static Pattern ABBREV_C2 = Pattern.compile("(?i)\\A[aefhilmnorsx][.-]");
private static Pattern ABBREV_C3 = Pattern.compile("(?i)\\A[a-z][.-]");
private static Pattern CONSONANT = Pattern.compile("(?i)\\A[^aeiouy]");
private static Pattern SPECVOWEL_C1 = Pattern.compile("(?i)\\Ae[uw]");
private static Pattern SPECVOWEL_C2 = Pattern.compile("(?i)\\Aonc?e\b");
private static Pattern SPECVOWEL_C3 = Pattern.compile("(?i)\\Auni(?:[^nmd]|mo)");
private static Pattern SPECVOWEL_C4 = Pattern.compile("(?i)\\Aut[th]");
private static Pattern SPECVOWEL_C5 = Pattern.compile("(?i)\\Au[bcfhjkqrst][aeiou]");
private static Pattern SPECCAP_C1 = Pattern.compile("\\AU[NK][AIEO]?");
private static Pattern VOWEL = Pattern.compile("(?i)\\A[aeiou]\\Z");
public static String pickIndefinite(String word) {
// Handle ordinal forms
if(A_ORD.matcher(word).find()) return "a";
if(AN_ORD.matcher(word).find()) return "an";
// Handle special cases
if(EXP_AN.matcher(word).find()) return "an";
if(SIN_AN.matcher(word).find()) return "an";
if(SIN_A.matcher(word).find()) return "a";
// Handle abbreviations
if(ABBREV_AN.matcher(word).find()) return "an";
if(ABBREV_C2.matcher(word).find()) return "an";
if(ABBREV_C3.matcher(word).find()) return "a";
// Handle consonants
if(CONSONANT.matcher(word).find()) return "a";
// Handle special vowel forms
if(SPECVOWEL_C1.matcher(word).find()) return "a";
if(SPECVOWEL_C2.matcher(word).find()) return "a";
if(SPECVOWEL_C3.matcher(word).find()) return "a";
if(SPECVOWEL_C4.matcher(word).find()) return "an";
if(SPECVOWEL_C5.matcher(word).find()) return "a";
// Handle special capitals
if(SPECCAP_C1.matcher(word).find()) return "a";
// Handle vowels
if(VOWEL.matcher(word).find()) return "an";
// Handle Y (before certain consonants, it implies a
// (unnaturalized) "I" sound)
if(IN_Y_AN.matcher(word).find()) return "an";
// Guess "A"
return "a";
}
}
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