1 files changed, 99 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/0.99-incubating/modules/databinding-sdo/src/main/java/org/apache/tuscany/sca/databinding/sdo/SDOContextHelper.java b/sca-java-1.x/tags/0.99-incubating/modules/databinding-sdo/src/main/java/org/apache/tuscany/sca/databinding/sdo/SDOContextHelper.java
new file mode 100644
index 0000000000..fd464e3750
--- /dev/null
+++ b/sca-java-1.x/tags/0.99-incubating/modules/databinding-sdo/src/main/java/org/apache/tuscany/sca/databinding/sdo/SDOContextHelper.java
@@ -0,0 +1,99 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.databinding.sdo;
+
+import java.lang.reflect.Method;
+
+import javax.xml.namespace.QName;
+
+import org.apache.tuscany.sca.databinding.TransformationContext;
+import org.apache.tuscany.sca.databinding.TransformationException;
+import org.apache.tuscany.sca.interfacedef.DataType;
+import org.apache.tuscany.sca.interfacedef.util.XMLType;
+import org.apache.tuscany.sdo.api.SDOUtil;
+
+import commonj.sdo.Type;
+import commonj.sdo.helper.HelperContext;
+import commonj.sdo.impl.HelperProvider;
+
+/**
+ * Helper class to get TypeHelper from the context
+ */
+public final class SDOContextHelper {
+    private SDOContextHelper() {
+    }
+
+    public static HelperContext getHelperContext(TransformationContext context) {
+        if (context == null) {
+            return getDefaultHelperContext();
+        }
+        HelperContext helperContext = SDOUtil.createHelperContext();
+        Class javaType = context.getTargetDataType().getPhysical();
+        boolean found = register(helperContext, javaType);
+        javaType = context.getSourceDataType().getPhysical();
+        found = found || register(helperContext, javaType);
+        if (found) {
+            return helperContext;
+        } else {
+            return getDefaultHelperContext();
+        }
+
+    }
+
+    /**
+     * FIXME: [rfeng] This is a hack to get the factory out a SDO class
+     * @param helperContext
+     * @param javaType
+     */
+
+    private static boolean register(HelperContext helperContext, Class javaType) {
+        try {
+            Type type = helperContext.getTypeHelper().getType(javaType);
+            if (type != null && (!type.isDataType())) {
+                Method method = type.getClass().getMethod("getEPackage", new Class[] {});
+                Object factory = method.invoke(type, new Object[] {});
+                method = factory.getClass().getMethod("register", new Class[] {HelperContext.class});
+                method.invoke(factory, new Object[] {helperContext});
+                return true;
+            }
+            return false;
+        } catch (Exception e) {
+            throw new TransformationException(e);
+        }
+    }
+
+    public static HelperContext getDefaultHelperContext() {
+        // SDOUtil.createHelperContext();
+        return HelperProvider.getDefaultContext();
+    }
+
+    public static QName getElement(DataType<?> dataType) {
+        Object logical = dataType.getLogical();
+        QName elementName = SDODataBinding.ROOT_ELEMENT;
+        if (logical instanceof XMLType) {
+            XMLType xmlType = (XMLType)logical;
+            QName element = xmlType.getElementName();
+            if (element != null) {
+                elementName = element;
+            }
+        }
+        return elementName;
+    }
+}