From 6a5cdf5cb38ce11bc00c07730001e837df90002e Mon Sep 17 00:00:00 2001
From: "David M. Lloyd" <david.lloyd@redhat.com>
Date: Thu, 13 Dec 2018 14:49:07 -0600
Subject: [PATCH] [#63] A multi-value config get operation

---
 .../io/smallrye/config/SmallRyeConfig.java     | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/implementation/src/main/java/io/smallrye/config/SmallRyeConfig.java b/implementation/src/main/java/io/smallrye/config/SmallRyeConfig.java
index 431cebcf8..cfb5b5a04 100644
--- a/implementation/src/main/java/io/smallrye/config/SmallRyeConfig.java
+++ b/implementation/src/main/java/io/smallrye/config/SmallRyeConfig.java
@@ -21,6 +21,7 @@
 import java.io.Serializable;
 import java.lang.reflect.Array;
 import java.lang.reflect.Type;
+import java.util.Collection;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
@@ -28,6 +29,7 @@
 import java.util.NoSuchElementException;
 import java.util.Optional;
 import java.util.Set;
+import java.util.function.IntFunction;
 
 import org.eclipse.microprofile.config.Config;
 import org.eclipse.microprofile.config.spi.ConfigSource;
@@ -47,6 +49,22 @@ protected SmallRyeConfig(List<ConfigSource> configSources, Map<Type, Converter>
         this.converters.putAll(converters);
     }
 
+    // no @Override
+    public <T, C extends Collection<T>> C getValues(String name, Class<T> itemClass, IntFunction<C> collectionFactory) {
+        for (ConfigSource configSource : configSources) {
+            String value = configSource.getValue(name);
+            if (value != null) {
+                String[] itemStrings = StringUtil.split(value);
+                final C collection = collectionFactory.apply(itemStrings.length);
+                for (String itemString : itemStrings) {
+                    collection.add(convert(itemString, itemClass));
+                }
+                return collection;
+            }
+        }
+        return collectionFactory.apply(0);
+    }
+
     @Override
     public <T> T getValue(String name, Class<T> aClass) {
         for (ConfigSource configSource : configSources) {