Added extra setters with null and empty checks.

dependency-check-utils/src/main/java/org/owasp/dependencycheck/utils/Settings.java

@@ -444,6 +444,30 @@ public final class Settings {
         LOGGER.debug("Setting: {}='{}'", key, value);
     }
 
+    /**
+     * Sets a property value only if the value is not null.
+     *
+     * @param key the key for the property
+     * @param value the value for the property
+     */
+    public static void setStringIfNotNull(String key, String value) {
+        if (null != value) {
+            setString(key, value);
+        }
+    }
+
+    /**
+     * Sets a property value only if the value is not null and not empty.
+     *
+     * @param key the key for the property
+     * @param value the value for the property
+     */
+    public static void setStringIfNotEmpty(String key, String value) {
+        if (null != value && !value.isEmpty()) {
+            setString(key, value);
+        }
+    }
+
     /**
      * Sets a property value.
      *
@@ -454,6 +478,18 @@ public final class Settings {
         setString(key, Boolean.toString(value));
     }
 
+    /**
+     * Sets a property value only if the value is not null.
+     *
+     * @param key the key for the property
+     * @param value the value for the property
+     */
+    public static void setBooleanIfNotNull(String key, Boolean value) {
+        if (null != value) {
+            setBoolean(key, value);
+        }
+    }
+
     /**
      * Sets a property value.
      *
@@ -465,6 +501,18 @@ public final class Settings {
         LOGGER.debug("Setting: {}='{}'", key, value);
     }
 
+    /**
+     * Sets a property value only if the value is not null.
+     *
+     * @param key the key for the property
+     * @param value the value for the property
+     */
+    public static void setIntIfNotNull(String key, Integer value) {
+        if (null != value) {
+            setInt(key, value);
+        }
+    }
+
     /**
      * Merges a new properties file into the current properties. This method allows for the loading of a user provided properties
      * file.<br/><br/>

dependency-check-utils/src/test/java/org/owasp/dependencycheck/utils/SettingsTest.java

@@ -77,6 +77,32 @@ public class SettingsTest extends BaseTest {
         Assert.assertEquals(expResults, value);
     }
 
+    /**
+     * Test of setStringIfNotNull method, of class Settings.
+     */
+    @Test
+    public void testSetStringIfNotNull() {
+        String key = "nullableProperty";
+        String value = "someValue";
+        Settings.setString(key, value);
+        Settings.setStringIfNotNull(key, null); // NO-OP
+        String expResults = Settings.getString(key);
+        Assert.assertEquals(expResults, value);
+    }
+
+    /**
+     * Test of setStringIfNotNull method, of class Settings.
+     */
+    @Test
+    public void testSetStringIfNotEmpty() {
+        String key = "optionalProperty";
+        String value = "someValue";
+        Settings.setString(key, value);
+        Settings.setStringIfNotEmpty(key, ""); // NO-OP
+        String expResults = Settings.getString(key);
+        Assert.assertEquals(expResults, value);
+    }
+
     /**
      * Test of getString method, of class Settings.
      */