From 56b054e33a9f6839d345f7c2c4b052eb701f136d Mon Sep 17 00:00:00 2001
From: cantor <cantor@de75baf8-a10c-0410-a50a-987c0e22f00f>
Date: Tue, 21 Feb 2006 19:47:02 +0000
Subject: [PATCH] Add factory methods and default builder

git-svn-id: https://svn.middleware.georgetown.edu/cpp-xmltooling/trunk@23 de75baf8-a10c-0410-a50a-987c0e22f00f
---
 xmltooling/XMLObjectBuilder.cpp | 71 +++++++++++++++++++++++++++++++++++++++++
 xmltooling/XMLObjectBuilder.h   | 58 +++++++++++++++++++++++++--------
 2 files changed, 116 insertions(+), 13 deletions(-)
 create mode 100644 xmltooling/XMLObjectBuilder.cpp

diff --git a/xmltooling/XMLObjectBuilder.cpp b/xmltooling/XMLObjectBuilder.cpp
new file mode 100644
index 0000000..c3aa881
--- /dev/null
+++ b/xmltooling/XMLObjectBuilder.cpp
@@ -0,0 +1,71 @@
+/*
+ *  Copyright 2001-2006 Internet2
+ * 
+ * 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.
+ */
+
+/**
+ * XMLObjectBuilder.cpp
+ * 
+ * Factory interface for XMLObjects 
+ */
+
+#include "internal.h"
+#include "XMLObjectBuilder.h"
+#include "util/NDC.h"
+#include "util/XMLHelper.h"
+
+#include <log4cpp/Category.hh>
+
+using namespace xmltooling;
+using namespace log4cpp;
+using namespace std;
+
+map<QName,XMLObjectBuilder*> XMLObjectBuilder::m_map;
+XMLObjectBuilder* XMLObjectBuilder::m_default=NULL;
+
+const XMLObjectBuilder* XMLObjectBuilder::getBuilder(const DOMElement* domElement)
+{
+#ifdef _DEBUG
+    xmltooling::NDC ndc("getBuilder");
+#endif
+    Category& log=Category::getInstance(XMLTOOLING_LOGCAT".XMLObjectBuilder");
+ 
+    auto_ptr<QName> schemaType(XMLHelper::getXSIType(domElement));
+    const XMLObjectBuilder* xmlObjectBuilder = getBuilder(*(schemaType.get()));
+    if (xmlObjectBuilder) {
+        if (log.isDebugEnabled()) {
+            log.debug("Located XMLObjectBuilder for schema type: %s", schemaType->toString().c_str());
+        }
+        return xmlObjectBuilder;
+    }
+    
+    auto_ptr<QName> elementName(XMLHelper::getNodeQName(domElement));
+    xmlObjectBuilder = getBuilder(*(elementName.get()));
+    if (xmlObjectBuilder) {
+        if (log.isDebugEnabled()) {
+            log.debug("Located XMLObjectBuilder for element name: %s", elementName->toString().c_str());
+        }
+        return xmlObjectBuilder;
+    }
+
+    log.error("No XMLObjectBuilder was registered for element: %s", elementName->toString().c_str());
+    return NULL;
+}
+
+void XMLObjectBuilder::destroyBuilders()
+{
+    for_each(m_map.begin(),m_map.end(),cleanup_pair<QName,XMLObjectBuilder>());
+    m_map.clear();
+    deregisterDefaultBuilder();
+}
diff --git a/xmltooling/XMLObjectBuilder.h b/xmltooling/XMLObjectBuilder.h
index cd746f2..43e9daa 100644
--- a/xmltooling/XMLObjectBuilder.h
+++ b/xmltooling/XMLObjectBuilder.h
@@ -24,9 +24,12 @@
 #define __xmltooling_xmlobjbuilder_h__
 
 #include <map>
+#include <xercesc/dom/DOM.hpp>
 #include <xmltooling/QName.h>
 #include <xmltooling/XMLObject.h>
 
+using namespace xercesc;
+
 #if defined (_MSC_VER)
     #pragma warning( push )
     #pragma warning( disable : 4250 4251 )
@@ -49,27 +52,36 @@ namespace xmltooling {
          * 
          * @return the empty XMLObject
          */
-        virtual XMLObject* buildObject()=0;
+        virtual XMLObject* buildObject() const=0;
 
         /**
-         * Resets the state of the builder.
-         * 
-         * This normally means null'ing out any properties that were
-         * needed to build an object.
-         */
-        virtual void resetState()=0;
-        
-        /**
          * Retrieves an XMLObjectBuilder using the key it was registered with.
          * 
          * @param key the key used to register the builder
          * @return the builder
          */
-        static XMLObjectBuilder* getBuilder(const QName& key) {
+        static const XMLObjectBuilder* getBuilder(const QName& key) {
             std::map<QName,XMLObjectBuilder*>::const_iterator i=m_map.find(key);
             return (i==m_map.end()) ? NULL : i->second;
         }
-    
+
+        /**
+         * Retrieves an XMLObjectBuilder for a given DOM element
+         * 
+         * @param element the element for which to locate a builder
+         * @return the builder or NULL
+         */
+        static const XMLObjectBuilder* getBuilder(const DOMElement* element);
+
+        /**
+         * Retrieves the default XMLObjectBuilder for DOM elements
+         * 
+         * @return the default builder or NULL
+         */
+        static const XMLObjectBuilder* getDefaultBuilder(const DOMElement* element) {
+            return m_default;
+        }
+
         /**
          * Gets an immutable list of all the builders currently registered.
          * 
@@ -86,9 +98,20 @@ namespace xmltooling {
          * @param builder the builder
          */
         static void registerBuilder(const QName& builderKey, XMLObjectBuilder* builder) {
+            deregisterBuilder(builderKey);
             m_map[builderKey]=builder;
         }
-    
+
+        /**
+         * Registers a default builder
+         * 
+         * @param builder the default builder
+         */
+        static void registerDefaultBuilder(XMLObjectBuilder* builder) {
+            deregisterDefaultBuilder();
+            m_default=builder;
+        }
+
         /**
          * Deregisters a builder.
          * 
@@ -98,7 +121,15 @@ namespace xmltooling {
             delete getBuilder(builderKey);
             m_map.erase(builderKey);
         }
-        
+
+        /**
+         * Deregisters default builder.
+         */
+        static void deregisterDefaultBuilder() {
+            delete m_default;
+            m_default=NULL;
+        }
+
         /**
          * Unregisters and destroys all registered builders. 
          */
@@ -106,6 +137,7 @@ namespace xmltooling {
     
     private:
         static std::map<QName,XMLObjectBuilder*> m_map;
+        static XMLObjectBuilder* m_default;
     };
 
 };
-- 
2.1.4