1 files changed, 70 insertions, 0 deletions
diff --git a/bundle-plugin/src/main/java/com/yahoo/container/plugin/osgi/ExportPackages.java b/bundle-plugin/src/main/java/com/yahoo/container/plugin/osgi/ExportPackages.java
new file mode 100644
index 00000000000..253e0727050
--- /dev/null
+++ b/bundle-plugin/src/main/java/com/yahoo/container/plugin/osgi/ExportPackages.java
@@ -0,0 +1,70 @@
+// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.container.plugin.osgi;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+
+/**
+ * @author Tony Vaagenes
+ * @author ollivir
+ */
+public class ExportPackages {
+    public static class Export {
+        private final List<String> packageNames;
+        private final List<Parameter> parameters;
+
+        public Export(List<String> packageNames, List<Parameter> parameters) {
+            this.packageNames = packageNames;
+            this.parameters = parameters;
+        }
+
+        public Optional<String> version() {
+            for (Parameter par : parameters) {
+                if ("version".equals(par.getName())) {
+                    return Optional.of(par.getValue());
+                }
+            }
+            return Optional.empty();
+        }
+
+        public List<String> getPackageNames() {
+            return packageNames;
+        }
+
+        public List<Parameter> getParameters() {
+            return parameters;
+        }
+    }
+
+    public static class Parameter {
+        private final String name;
+        private final String value;
+
+        public Parameter(String name, String value) {
+            this.name = name;
+            this.value = value;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public String getValue() {
+            return value;
+        }
+    }
+
+    public static Map<String, Export> exportsByPackageName(Collection<Export> exports) {
+        Map<String, Export> ret = new HashMap<>();
+        for (Export export : exports) {
+            for (String packageName : export.getPackageNames()) {
+                //ensure that earlier exports of a package overrides later exports.
+                ret.computeIfAbsent(packageName, ign -> export);
+            }
+        }
+        return ret;
+    }
+}