From 032a4ce087f240631b6d2ada9bfe0b2c4542da25 Mon Sep 17 00:00:00 2001
From: Fabian Becker <halfdan@xnorfz.de>
Date: Sat, 1 Nov 2014 13:27:09 +0100
Subject: [PATCH] Added new convertToUnderscore method.

---
 src/eva2/tools/StringTools.java      | 38 ++++++++++++++++++++++++++++
 test/eva2/tools/StringToolsTest.java | 31 ++++++++++++++++++++---
 2 files changed, 65 insertions(+), 4 deletions(-)

diff --git a/src/eva2/tools/StringTools.java b/src/eva2/tools/StringTools.java
index f1a7ed00..c22379fc 100644
--- a/src/eva2/tools/StringTools.java
+++ b/src/eva2/tools/StringTools.java
@@ -429,6 +429,44 @@ public final class StringTools {
         return upcaseFirst(word);
     }
 
+    /**
+     * Converts a camelCase to a more human form, with spaces.
+     * E.g. 'Camel Case'.
+     *
+     * @param word Word to convert to a readable String
+     * @return Readable String representation of input word
+     */
+    public static String convertToUnderscore(final String word) {
+        Pattern pattern = Pattern.compile("([A-Z]|[a-z])[a-z]*");
+
+        List<String> tokens = new ArrayList<>();
+        Matcher matcher = pattern.matcher(word);
+        String acronym = "";
+        while (matcher.find()) {
+            String found = matcher.group();
+            if (found.matches("^[A-Z]$")) {
+                acronym += found;
+            } else {
+                if (acronym.length() > 0) {
+                    //we have an acronym to add before we continue
+                    tokens.add(acronym);
+                    acronym = "";
+                }
+                tokens.add(found);
+            }
+        }
+
+        if (acronym.length() > 0) {
+            tokens.add(acronym);
+        }
+
+        if (!tokens.isEmpty()) {
+            return concatFields(tokens, "-").toLowerCase();
+        }
+
+        return word.toLowerCase();
+    }
+
     /**
      * Takes a string and returns it with the first character
      * converted to uppercase.
diff --git a/test/eva2/tools/StringToolsTest.java b/test/eva2/tools/StringToolsTest.java
index daf3b350..6fc7419b 100644
--- a/test/eva2/tools/StringToolsTest.java
+++ b/test/eva2/tools/StringToolsTest.java
@@ -1,13 +1,14 @@
 package eva2.tools;
 
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.Map;
 import org.junit.After;
-import static org.junit.Assert.assertEquals;
 import org.junit.Before;
 import org.junit.Test;
 
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.junit.Assert.assertEquals;
+
 /**
  *
  * @author becker
@@ -47,6 +48,28 @@ public class StringToolsTest {
         }
 	}
 
+    /**
+     * Test of humaniseCamelCase method, of class StringTools.
+     */
+    @Test
+    public void testConvertToUnderscore() {
+        HashMap<String, String> map = new HashMap<>();
+        map.put("camelCase", "camel-case");
+        map.put("CamelCase", "camel-case");
+        map.put("thisIsAwesome", "this-is-awesome");
+        map.put("THQIsNice", "thq-is-nice");
+        map.put("iLikeABC", "i-like-abc");
+
+        String key, value;
+        for (Object o : map.entrySet()) {
+            Map.Entry pairs = (Map.Entry) o;
+            key = (String) pairs.getKey();
+            value = (String) pairs.getValue();
+            String result = StringTools.convertToUnderscore(key);
+            assertEquals(value, result);
+        }
+    }
+
 	/**
 	 * Test of upcaseFirst method, of class StringTools.
 	 */