Add utilities and corresponding unit tests for manipulation of strings and display dates.

webapp/src/edu/cornell/mannlib/vitro/webapp/utils/StringUtils.java

@@ -2,6 +2,9 @@
 
 package edu.cornell.mannlib.vitro.webapp.utils;
 
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 
 public class StringUtils {
@@ -19,10 +22,14 @@ public class StringUtils {
         if (glue == null) {
             glue = ",";
         }
+        
         String joinedList = "";      
         
         int count = 0;
         for (Object o : list) {
+            if (o == null) {
+                continue;
+            }
             String s = o.toString();
             if (count > 0) {
                 joinedList += glue;
@@ -38,10 +45,38 @@ public class StringUtils {
         return join(list, false, ",");
     }
     
+    public static String join(List<?> list, String glue) {
+        return join(list, false, glue);
+    }
+    
+    public static String join(String glue, String ...strings) {
+        List<String> list =  new ArrayList<String>();
+        for (String s : strings) {
+            list.add(s);
+        }
+        return join(list, false, glue);        
+    }
+    
+    public static String join(String[] stringArray, boolean quote, String glue) {
+        return join(Arrays.asList(stringArray), quote, glue);
+    }
+    
+    public static String join(String[] stringArray) {
+        return join(Arrays.asList(stringArray));
+    }
+    
+    public static String join(String[] stringArray, String glue) {
+        return join(Arrays.asList(stringArray), false, glue);
+    }
+    
     public static String quotedList(List<?> list, String glue) {    
         return join(list, true, glue);
     } 
     
+    public static String quotedList(String[] stringArray, String glue) {
+        return quotedList(Arrays.asList(stringArray), glue);
+    }
+    
     // Because we can't use Java 1.6 String.isEmpty()
     public static boolean isEmpty(String s) {
         return s == null || s.length() <= 0;
@@ -56,4 +91,9 @@ public class StringUtils {
         }
         return false;
     }
+    
+    public static String setNullToEmptyString(String s) {
+        return s == null ? "" : s;
+    }
+    
 }

webapp/src/edu/cornell/mannlib/vitro/webapp/utils/display/DateDisplayUtils.java

@@ -0,0 +1,45 @@
+/* $This file is distributed under the terms of the license in /doc/license.txt$ */
+
+package edu.cornell.mannlib.vitro.webapp.utils.display;
+
+import java.util.Arrays;
+import java.util.List;
+
+import edu.cornell.mannlib.vitro.webapp.utils.StringUtils;
+
+public class DateDisplayUtils {
+
+    public static String getDisplayDate(String date) {
+        String displayDate = null;
+        if (date == null) {
+            return displayDate;
+        }
+        List<String> dateParts = Arrays.asList(date.split("-"));
+        int datePartCount = dateParts.size();
+        switch (datePartCount) {
+        case 2: 
+            displayDate = StringUtils.join("/", dateParts.get(1), dateParts.get(0));
+            break;
+        case 3:
+            displayDate = StringUtils.join("/", dateParts.get(1), dateParts.get(2), dateParts.get(0));
+            break;
+        default: 
+            displayDate = date;
+        }
+        
+        return displayDate;     
+    }
+    
+    public static String getDisplayDateRange(String startDate, String endDate) {
+        startDate = StringUtils.setNullToEmptyString(startDate);
+        endDate = StringUtils.setNullToEmptyString(endDate);
+        List<String> dates = Arrays.asList(startDate, endDate);
+        return StringUtils.join(dates, " - ");
+    }
+    
+    public static String getDisplayDateRangeFromRawDates(String startDate, String endDate) {
+        return getDisplayDateRange(getDisplayDate(startDate), getDisplayDate(endDate));
+    }
+    
+
+}

webapp/test/edu/cornell/mannlib/vitro/webapp/utils/StringUtilsTest.java

@@ -2,6 +2,7 @@
 
 package edu.cornell.mannlib.vitro.webapp.utils;
 
+import java.util.Arrays;
 import java.util.List;
 import java.util.ArrayList;
 
@@ -10,11 +11,14 @@ import org.junit.Test;
 import junit.framework.Assert;
 
 import edu.cornell.mannlib.vitro.testing.AbstractTestClass;
+import edu.cornell.mannlib.vitro.webapp.utils.display.DateDisplayUtils;
 
 public class StringUtilsTest extends AbstractTestClass {
     
     protected static List<String> stringList = new ArrayList<String>();
     protected static List<Integer> intList = new ArrayList<Integer>();
+    protected static List<String> stringListWithNulls = new ArrayList<String>();
+    protected static String[] stringArray = {"duck", "goose", "crow"};
     static {
         stringList.add("apple");
         stringList.add("banana");
@@ -23,6 +27,11 @@ public class StringUtilsTest extends AbstractTestClass {
         intList.add(1);
         intList.add(2);
         intList.add(3);
+
+        stringListWithNulls.add("rock");
+        stringListWithNulls.add("paper");
+        stringListWithNulls.add((String)null);
+        stringListWithNulls.add("scissors");        
     }
 
     @Test
@@ -57,12 +66,37 @@ public class StringUtilsTest extends AbstractTestClass {
     @Test 
     public void testJoinArgs() {             
         
+        // Three args
         Assert.assertEquals("apple:banana:orange", StringUtils.join(stringList, false, ":"));
         Assert.assertEquals("\"apple\"|\"banana\"|\"orange\"", StringUtils.join(stringList, true, "|"));
         Assert.assertEquals("\"apple\",\"banana\",\"orange\"", StringUtils.join(stringList, true, null));
         Assert.assertEquals("apple,banana,orange", StringUtils.join(stringList, false, null));
         Assert.assertEquals("apple...banana...orange", StringUtils.join(stringList, false, "..."));  
         
+        // Two args
+        Assert.assertEquals("apple - banana - orange", StringUtils.join(stringList, " - "));
+    }    
+    
+    @Test 
+    public void testJoinWithNulls() {
+        Assert.assertEquals("rock,paper,scissors", StringUtils.join(stringListWithNulls));      
+    }
+    
+    @Test
+    public void testJoinWithVarargs() {
+        Assert.assertEquals("apple,banana,orange", StringUtils.join((String)null, "apple", "banana", "orange"));
+        Assert.assertEquals("he/she/it", StringUtils.join("/", "he", "she", "it"));       
+    }
+    
+    @Test
+    public void testJoinWithEmptyString() {
+        Assert.assertEquals(" - 1990", StringUtils.join(" - ", "", "1990"));
+        Assert.assertEquals("1990 - ", StringUtils.join(" - ", "1990", ""));
+    }
+
+    @Test
+    public void testArrayJoin() {
+        Assert.assertEquals("duck,goose,crow", StringUtils.join(stringArray));
     }
     
     @Test 
@@ -81,4 +115,11 @@ public class StringUtilsTest extends AbstractTestClass {
         Assert.assertFalse(StringUtils.equalsOneOf(s1, "dog", "mouse", "horse"));
         Assert.assertFalse(StringUtils.equalsOneOf(s1));       
     }
+    
+    @Test
+    public void testSetNullToEmptyString() {
+        Assert.assertEquals("", StringUtils.setNullToEmptyString((String)null));
+        Assert.assertEquals("cat", StringUtils.setNullToEmptyString("cat"));        
+    }
+    
 }

webapp/test/edu/cornell/mannlib/vitro/webapp/utils/display/DateDisplayUtilsTest.java

@@ -0,0 +1,38 @@
+/* $This file is distributed under the terms of the license in /doc/license.txt$ */
+
+package edu.cornell.mannlib.vitro.webapp.utils.display;
+
+import junit.framework.Assert;
+
+import org.junit.Test;
+
+public class DateDisplayUtilsTest {
+    
+    @Test
+    public void testDisplayDate() {
+        String date = "2009-10";
+        Assert.assertEquals("10/2009", DateDisplayUtils.getDisplayDate(date));
+    }
+    
+    @Test
+    public void testGetDisplayDateRange() {
+        String startRaw = "2010-10-11";
+        String endRaw = "2010-11-09";
+        Assert.assertEquals("10/11/2010 - 11/09/2010", DateDisplayUtils.getDisplayDateRangeFromRawDates(startRaw, endRaw));
+        
+        String start1 = "1/2/2010";
+        String end1 = "3/4/2011";
+        Assert.assertEquals("1/2/2010 - 3/4/2011", DateDisplayUtils.getDisplayDateRange(start1, end1));
+        
+        String empty = "";
+        Assert.assertEquals("1/2/2010 - ", DateDisplayUtils.getDisplayDateRange(start1, empty));
+        Assert.assertEquals(" - 3/4/2011", DateDisplayUtils.getDisplayDateRange(empty, end1));
+        
+        Assert.assertEquals("1/2/2010 - ", DateDisplayUtils.getDisplayDateRange(start1, (String)null));
+        Assert.assertEquals(" - 3/4/2011", DateDisplayUtils.getDisplayDateRange((String)null, end1));       
+    }
+    
+
+
+
+}