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Immutable Clojure collections and a Transformation abstraction for Java 8+, immutably, type-safely, and with good performance.
// Copyright 2014-02-09 PlanBase Inc. & Glen Peterson
//
// 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 org.organicdesign.fp;
/**
A dumping ground for utility functions that aren't useful enough to belong in
{@link StaticImports}.
*/
public class FunctionUtils {
// I don't want any instances of this class.
private FunctionUtils() {
throw new UnsupportedOperationException("No instantiation");
}
public static String stringify(Object o) {
if (o == null) { return "null"; }
if (o instanceof String) { return "\"" + o + "\""; }
return o.toString();
}
// Not Needed in Java 8.
// /** Returns a String showing the type and first few elements of a map */
// public static String mapToString(Map map) {
// if (map == null) {
// return "null";
// }
// StringBuilder sB = new StringBuilder();
//
// sB.append(map.getClass().getSimpleName());
// sB.append("(");
//
// int i = 0;
// for (Map.Entry item : map.entrySet()) {
// if (i > 4) {
// sB.append(",...");
// break;
// } else if (i > 0) {
// sB.append(",");
// }
// sB.append("Entry(").append(String.valueOf(item.getKey())).append(",");
// sB.append(String.valueOf(item.getValue())).append(")");
// i++;
// }
//
// sB.append(")");
// return sB.toString();
// }
//
// /** Returns a String showing the type and first few elements of an array */
// public static String arrayToString(Object[] as) {
// if (as == null) {
// return "null";
// }
// StringBuilder sB = new StringBuilder();
// sB.append("Array");
//
// if ( (as.length > 0) && (as[0] != null) ) {
// sB.append("<");
// sB.append(as[0].getClass().getSimpleName());
// sB.append(">");
// }
//
// sB.append("(");
//
// int i = 0;
// for (Object item : as) {
// if (i > 4) {
// sB.append(",...");
// break;
// } else if (i > 0) {
// sB.append(",");
// }
// }
//
// sB.append(")");
// return sB.toString();
// }
// public static String truncateIfNecessary(String in, int maxLen) {
// if ( (in == null) || (in.length() <= maxLen) ) {
// return in;
// }
// return in.substring(0, maxLen);
// }
//
// public static Date earliestOrNull(Date... dates) {
// if ( (dates == null) || (dates.length < 1) ) {
// return null;
// }
// Date earliest = null;
// for (Date date : dates) {
// if (earliest == null) {
// earliest = date;
// } else if ((date != null) && (date.before(earliest)) ) {
// earliest = date;
// }
// }
// return earliest;
// }
//
// public enum EnglishListType {
// AND("and"),
// OR("or");
// public final String word;
// EnglishListType(String s) {
// word = s;
// }
// }
//
// public static String unsafeEnglishList(Collection rips, EnglishListType type) {
// if ( (rips == null) || (rips.size() < 1) ) {
// return "";
// }
// StringBuilder sB = new StringBuilder();
// int i = 0;
// for (Object rip : rips) {
// i++;
// if (i > 1) {
// if (rips.size() > 2) {
// // if there are three or more rips, print with commas
// // between all but the last two - they get ", and "
// if (i < rips.size()) {
// sB.concat(", ");
// } else {
// // The serial comma!
// sB.concat(", ");
// sB.concat(type.word);
// sB.concat(" ");
// }
// } else if ( (rips.size() == 2) && (i == 2) ) {
// // If there are two rips, print with " and " inbetween
// sB.concat(" ");
// sB.concat(type.word);
// sB.concat(" ");
// }
// }
// // print it. This is safe because these strings are hard-coded
// // above, do not come from the user, and are HTML-safe.
// sB.concat(rip.toString());
// }
// return sB.toString();
// }
//
// public static String commaSepList(Iterable is) {
// StringBuilder sB = new StringBuilder();
// boolean isFirst = true;
// for (Object o : is) {
// if (isFirst) {
// isFirst = false;
// } else {
// sB.concat(", ");
// }
// sB.concat(String.valueOf(o));
// }
// return sB.toString();
// }
public static String ordinal(final int origI) {
final int i = (origI < 0) ? -origI : origI;
final int modTen = i % 10;
if ( (modTen < 4) && (modTen > 0)) {
int modHundred = i % 100;
if ( (modHundred < 21) && (modHundred > 3) ) {
return Integer.toString(origI) + "th";
}
switch (modTen) {
case 1: return Integer.toString(origI) + "st";
case 2: return Integer.toString(origI) + "nd";
case 3: return Integer.toString(origI) + "rd";
}
}
return Integer.toString(origI) + "th";
}
}
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