[WIP] REPO-3918 java 11 (#32)

* REPO-3918 use java 11 + Added CompoundEnumeration manually because it was removed in Java 9

pom.xml

@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.alfresco</groupId>
         <artifactId>alfresco-super-pom</artifactId>
-        <version>9</version>
+        <version>10</version>
     </parent>
 
     <artifactId>alfresco-data-model</artifactId>
@@ -31,7 +31,7 @@
     </distributionManagement>
 
     <properties>
-        <dependency.alfresco-core.version>7.4</dependency.alfresco-core.version>
+        <dependency.alfresco-core.version>7.5</dependency.alfresco-core.version>
 
         <!-- Files to exclude from SonarQube analysis -->
         <sonar.exclusions>

src/main/java/org/alfresco/util/BaseApplicationContextHelper.java

@@ -32,6 +32,7 @@ import java.util.Arrays;
 import java.util.Enumeration;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.NoSuchElementException;
 
 import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
@@ -42,8 +43,6 @@ import org.springframework.core.io.Resource;
 import org.springframework.core.io.ResourceLoader;
 import org.springframework.web.context.support.ServletContextResourcePatternResolver;
 
-import sun.misc.CompoundEnumeration;
-
 /**
  * Helper class to provide static and common access to the Spring
  * {@link org.springframework.context.ApplicationContext application context}.
@@ -302,3 +301,37 @@ public abstract class BaseApplicationContextHelper
         }
     }
 }
+
+/*
+ * A utility class that will enumerate over an array of enumerations.
+ * was removed in version JDK 1.9
+ */
+final class CompoundEnumeration<E> implements Enumeration<E> {
+    private final Enumeration<E>[] enums;
+    private int index;
+
+    public CompoundEnumeration(Enumeration<E>[] enums) {
+        this.enums = enums;
+    }
+
+    private boolean next() {
+        while (index < enums.length) {
+            if (enums[index] != null && enums[index].hasMoreElements()) {
+                return true;
+            }
+            index++;
+        }
+        return false;
+    }
+
+    public boolean hasMoreElements() {
+        return next();
+    }
+
+    public E nextElement() {
+        if (!next()) {
+            throw new NoSuchElementException();
+        }
+        return enums[index].nextElement();
+    }
+}