CXF-8701: eliminate use of java.beans.Introspector, reduce footprint dependency on java.desktop

Signed-off-by: Raymond Augé <[email protected]>

Author: rotty3000

core/src/main/java/org/apache/cxf/common/jaxb/SchemaCollectionContextProxy.java

@@ -43,6 +43,7 @@
 
 import org.w3c.dom.Document;
 
+import org.apache.cxf.common.util.ClassHelper;
 import org.apache.cxf.common.util.StringUtils;
 import org.apache.cxf.common.xmlschema.SchemaCollection;
 import org.apache.ws.commons.schema.XmlSchemaElement;
@@ -135,7 +136,7 @@ public Object getBeanInfo(Class<?> cls) {
         String name = xre == null ? "##default" : xre.name();
         String namespace = xre == null ? "##default" : xre.namespace();
         if ("##default".equals(name)) {
-            name = java.beans.Introspector.decapitalize(cls.getSimpleName());
+            name = ClassHelper.decapitalizedSimpleName(cls);
         }
         if ("##default".equals(namespace) && cls.getPackage() != null) {
             XmlSchema sc = cls.getPackage().getAnnotation(XmlSchema.class);
@@ -199,7 +200,7 @@ private QName getTypeQName(Class<?> cls, String namespace) {
         String tn = xtype == null ? "##default" : xtype.name();
         String tns = xtype == null ? "##default" : xtype.namespace();
         if ("##default".equals(tn)) {
-            tn = java.beans.Introspector.decapitalize(cls.getSimpleName());
+            tn = ClassHelper.decapitalizedSimpleName(cls);
         }
         if ("##default".equals(tns) || StringUtils.isEmpty(tns)) {
             tns = JAXBUtils.getPackageNamespace(cls);

core/src/main/java/org/apache/cxf/common/util/ClassHelper.java

@@ -101,6 +101,23 @@ private Object getRealObjectInternal(Object o) {
         return o instanceof Proxy ? Proxy.getInvocationHandler(o) : o;
     }
 
+    public static String decapitalizedSimpleName(Class<?> clazz) {
+        if (clazz == null) {
+            return null;
+        }
+        String name = clazz.getSimpleName();
+        if (name == null || name.isEmpty()) {
+            return name;
+        }
+        if (name.length() > 1 && Character.isUpperCase(name.charAt(1))
+            && Character.isUpperCase(name.charAt(0))) {
+            return name;
+        }
+        char[] chars = name.toCharArray();
+        chars[0] = Character.toLowerCase(chars[0]);
+        return new String(chars);
+    }
+
     public static Class<?> getRealClass(Object o) {
         return getRealClass(null, o);
     }