Merge pull request #975 from gtroitsk/image-util-class

Add ImageUtil class

quarkus-test-images/src/main/java/io/quarkus/test/utils/ImageUtil.java

@@ -0,0 +1,36 @@
+package io.quarkus.test.utils;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public final class ImageUtil {
+
+    private static final String COLON = ":";
+    private static final Map<String, String[]> PROPERTY_TO_IMAGE = new HashMap<>();
+
+    private ImageUtil() {
+        // util class
+    }
+
+    public static String getImageVersion(String imageProperty) {
+        return getImage(imageProperty)[1];
+    }
+
+    public static String getImageName(String imageProperty) {
+        return getImage(imageProperty)[0];
+    }
+
+    private static String[] getImage(String imageProperty) {
+        return PROPERTY_TO_IMAGE.computeIfAbsent(imageProperty, ip -> {
+            final String image = System.getProperty(imageProperty);
+            if (image == null) {
+                throw new IllegalStateException(String.format("System property '%s' is missing.", imageProperty));
+            }
+            if (!image.contains(COLON)) {
+                throw new IllegalStateException(String.format("'%s' is not valid Docker image", image));
+            }
+            return image.split(COLON);
+        });
+    }
+
+}