[java-support] branch master updated: Add null element check for collections.

[Marvin S. Addison]

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serac pushed a commit to branch master
in repository java-support.

The following commit(s) were added to refs/heads/master by this push:
       new  373d4d8   Add null element check for collections.
373d4d8 is described below

commit 373d4d8a7244c14badf883c5c0e3cc995ff212f6
Author: Marvin S. Addison <marvin.addison at gmail.com>
AuthorDate: Fri Oct 9 14:19:27 2015 -0400

    Add null element check for collections.
---
 .../utilities/java/support/logic/Constraint.java   | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/main/java/net/shibboleth/utilities/java/support/logic/Constraint.java b/src/main/java/net/shibboleth/utilities/java/support/logic/Constraint.java
index 3b40044..958043b 100644
--- a/src/main/java/net/shibboleth/utilities/java/support/logic/Constraint.java
+++ b/src/main/java/net/shibboleth/utilities/java/support/logic/Constraint.java
@@ -289,6 +289,30 @@ public final class Constraint {
     }
 
     /**
+     * Checks that the collection does not contain any null elements.
+     *
+     * @param <T> type of collection to inspect.
+     * @param collection to check.
+     * @param message message used in the {@link ConstraintViolationException}
+     *
+     * @return the given array
+     */
+    @Nonnull public static <T extends Collection<?>> T noNullItems(
+            @Nonnull final T collection, @Nonnull String message) {
+        if (collection == null) {
+            throw new ConstraintViolationException(message);
+        }
+
+        for (Object element : collection) {
+            if (element == null) {
+                throw new ConstraintViolationException(message);
+            }
+        }
+
+        return collection;
+    }
+
+    /**
      * Checks that the given number is in the exclusive range. If the number is not in the range an
      * {@link ConstraintViolationException} is thrown.
      * 

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