svn commit: r389732 - /webservices/axis2/trunk/java/modules/jibx/src/org/apache/axis2/jibx/CodeGenerationUtility.java

[ds...@apache.org]

Author: dsosnoski
Date: Wed Mar 29 01:48:53 2006
New Revision: 389732

URL: http://svn.apache.org/viewcvs?rev=389732&view=rev
Log:
Dynamically loaded extension class for JiBX code generation

Added:
    webservices/axis2/trunk/java/modules/jibx/src/org/apache/axis2/jibx/CodeGenerationUtility.java

Added: webservices/axis2/trunk/java/modules/jibx/src/org/apache/axis2/jibx/CodeGenerationUtility.java
URL: http://svn.apache.org/viewcvs/webservices/axis2/trunk/java/modules/jibx/src/org/apache/axis2/jibx/CodeGenerationUtility.java?rev=389732&view=auto
==============================================================================
--- webservices/axis2/trunk/java/modules/jibx/src/org/apache/axis2/jibx/CodeGenerationUtility.java (added)
+++ webservices/axis2/trunk/java/modules/jibx/src/org/apache/axis2/jibx/CodeGenerationUtility.java Wed Mar 29 01:48:53 2006
@@ -0,0 +1,139 @@
+/*
+ * Copyright 2006 The Apache Software Foundation.
+ *
+ * Licensed 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.axis2.jibx;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.util.HashMap;
+import java.util.Iterator;
+
+import javax.xml.namespace.QName;
+
+import org.jibx.binding.model.BindingElement;
+import org.jibx.binding.model.ElementBase;
+import org.jibx.binding.model.MappingElement;
+import org.jibx.binding.model.NamespaceElement;
+import org.jibx.binding.model.ValidationContext;
+import org.jibx.runtime.JiBXException;
+
+/**
+ * Framework-linked code used by JiBX data binding support. This is accessed via
+ * reflection from the JiBX code generation extension when JiBX data binding is
+ * selected.
+ * 
+ * @author dsosnoski
+ */
+public class CodeGenerationUtility {
+
+    /**
+     * Get map from qname to corresponding class name from binding definition.
+     * Only the global <mapping> elements in the binding definition are
+     * included, since these are the only ones accessible from the Axis2
+     * interface.
+     * 
+     * @param path binding definition file path
+     * @return map from qname to class name
+     */
+    public static HashMap getBindingMap(String path) {
+        
+        // make sure the binding definition file is present
+        File file = new File(path);
+        if (!file.exists()) {
+            throw new RuntimeException("jibx binding definition file " + path + " not found");
+//                CodegenMessages.getMessage("extension.encodedNotSupported"));
+        }
+        
+        // Read the JiBX binding definition into memory. The binding definition
+        // is not currently validated so as not to require the user to have all
+        // the referenced classes in the classpath, though this does make for
+        // added work in finding the namespaces.
+        try {
+            ValidationContext vctx = BindingElement.newValidationContext();
+            BindingElement binding =
+                BindingElement.readBinding(new FileInputStream(file), path, vctx);
+            if (vctx.getErrorCount() != 0 || vctx.getFatalCount() != 0) {
+                throw new RuntimeException("invalid jibx binding definition file " + path);
+            }
+            
+            // create map from qname to class for all top-level mappings
+            return defineBoundClasses(binding);
+            
+        } catch (FileNotFoundException e) {
+            throw new RuntimeException(e);
+        } catch (JiBXException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    /**
+     * Create mapping from qnames to classes for top level mappings in JiBX binding.
+     * 
+     * @param binding
+     * @return map from qname to class
+     */
+    private static HashMap defineBoundClasses(BindingElement binding) {
+        
+        // check default namespace set at top level of binding
+        String defaultns = findDefaultNS(binding.topChildIterator());
+        
+        // add all top level mapping definitions to map from qname to class
+        HashMap mappings = new HashMap();
+        for (Iterator iter = binding.topChildIterator(); iter.hasNext();) {
+            ElementBase child = (ElementBase)iter.next();
+            if (child.type() == ElementBase.MAPPING_ELEMENT) {
+                MappingElement mapping = (MappingElement)child;
+                String name = mapping.getName();
+                if (name != null) {
+                    String uri = mapping.getUri();
+                    if (uri == null) {
+                        uri = findDefaultNS(mapping.topChildIterator());
+                        if (uri == null) {
+                            uri = defaultns;
+                        }
+                    }
+                    mappings.put(new QName(uri, name), mapping.getClassName());
+                }
+            }
+        }
+        return mappings;
+    }
+
+    /**
+     * Find the default namespace within a list of JiBX binding model elements
+     * possibly including namespace definitions. Once a non-namespace definition
+     * element is seen in the list, this just returns (since the namespace
+     * definitions always come first in JiBX's binding format).
+     * 
+     * @param iter iterator for elements in list
+     */
+    private static String findDefaultNS(Iterator iter) {
+        while (iter.hasNext()) {
+            ElementBase child = (ElementBase)iter.next();
+            if (child.type() == ElementBase.NAMESPACE_ELEMENT) {
+                NamespaceElement namespace = (NamespaceElement)child;
+                String defaultName = namespace.getDefaultName();
+                if ("elements".equals(defaultName) || "all".equals(defaultName)) {
+                    return namespace.getUri();
+                }
+            } else {
+               break;
+            }
+        }
+        return null;
+    }
+}
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