Add test utility to scan for Structure.getFieldOrder() issues.

build.xml

@@ -243,6 +243,7 @@
         <fileset dir="lib">
           <include name="junit.jar"/>
         </fileset>
+        <fileset dir="lib/test"/>
         <pathelement path="${classes}"/>
       </path>
     </path>

test/com/sun/jna/StructureFieldOrderInspector.java

@@ -0,0 +1,50 @@
+package com.sun.jna;
+
+import org.reflections.Reflections;
+import org.reflections.scanners.ResourcesScanner;
+import org.reflections.scanners.SubTypesScanner;
+import org.reflections.util.ClasspathHelper;
+import org.reflections.util.ConfigurationBuilder;
+import org.reflections.util.FilterBuilder;
+
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Utility class for detecting missing {@link com.sun.jna.Structure#getFieldOrder()} methods.
+ *
+ * This class could be moved to the unit test tree, but them reusing it in the 'platform' project would require
+ * publishing this test tree.
+ *
+ * @author Dan Rollo
+ * Date: 1/17/13
+ * Time: 4:08 PM
+ */
+public final class StructureFieldOrderInspector {
+
+    private StructureFieldOrderInspector(){}
+
+    /**
+     * Find all classes that extend {@link Structure}.
+     */
+    public static Set<Class<Structure>> findStructureSubClasses(final ClassLoader classLoader) {
+
+        // @todo use: http://code.google.com/p/reflections/
+
+        List<ClassLoader> classLoadersList = new LinkedList<ClassLoader>();
+        classLoadersList.add(ClasspathHelper.contextClassLoader());
+        classLoadersList.add(ClasspathHelper.staticClassLoader());
+
+        Reflections reflections = new Reflections(new ConfigurationBuilder()
+                .setScanners(new SubTypesScanner(false /* don't exclude Object.class */), new ResourcesScanner())
+                .setUrls(ClasspathHelper.forClassLoader(classLoadersList.toArray(new ClassLoader[0])))
+                .filterInputsBy(new FilterBuilder().include(FilterBuilder.prefix("org.your.package"))));
+
+        //Set<Class<?>> classes = reflections.getSubTypesOf(Object.class);
+        Set<Class<Structure>> classes = (Set<Class<Structure>>) reflections.getSubTypesOf(Structure.class);
+
+        return classes;
+    }
+
+}

test/com/sun/jna/StructureFieldOrderInspectorTest.java

@@ -0,0 +1,11 @@
+package com.sun.jna;
+
+/**
+ * Created with IntelliJ IDEA.
+ * User: dan
+ * Date: 1/17/13
+ * Time: 4:29 PM
+ * To change this template use File | Settings | File Templates.
+ */
+public class StructureFieldOrderInspectorTest {
+}