Add new builder base class to indicate support for "argument-less" construction.

[shibboleth/opensaml2.git] / saml / saml2 / metadata / impl / NullMetadataProvider.cpp

diff --git a/saml/saml2/metadata/impl/NullMetadataProvider.cpp b/saml/saml2/metadata/impl/NullMetadataProvider.cpp
new file mode 100644 (file)
index 0000000..c7c6ca2
--- /dev/null
+++ b/saml/saml2/metadata/impl/NullMetadataProvider.cpp
@@ -0,0 +1,69 @@
+/*
+ *  Copyright 2001-2007 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.
+ */
+
+/**
+ * NullMetadataProvider.cpp
+ * 
+ * Dummy provider that returns an empty entity supporting any role.
+ */
+
+#include "internal.h"
+#include "saml2/metadata/Metadata.h"
+#include "saml2/metadata/DynamicMetadataProvider.h"
+
+#include <xmltooling/util/XMLHelper.h>
+
+using namespace opensaml::saml2md;
+using namespace xmltooling;
+using namespace std;
+
+namespace opensaml {
+    namespace saml2md {
+        class SAML_DLLLOCAL NullMetadataProvider : public DynamicMetadataProvider
+        {
+        public:
+            NullMetadataProvider(const DOMElement* e) : DynamicMetadataProvider(e), m_template(NULL) {
+                e = XMLHelper::getFirstChildElement(e, samlconstants::SAML20MD_NS, EntityDescriptor::LOCAL_NAME);
+                if (e)
+                    m_template = dynamic_cast<EntityDescriptor*>(XMLObjectBuilder::buildOneFromElement(const_cast<DOMElement*>(e)));
+            }
+
+            virtual ~NullMetadataProvider() {
+                delete m_template;
+            }
+
+        protected:
+            EntityDescriptor* resolve(const char* entityID) const;
+
+        private:
+            EntityDescriptor* m_template;
+        }; 
+
+        MetadataProvider* SAML_DLLLOCAL NullMetadataProviderFactory(const DOMElement* const & e)
+        {
+            return new NullMetadataProvider(e);
+        }
+    };
+};
+
+EntityDescriptor* NullMetadataProvider::resolve(const char* entityID) const
+{
+    // Resolving for us just means fabricating a new dummy element.
+    EntityDescriptor* entity = m_template ? m_template->cloneEntityDescriptor() : EntityDescriptorBuilder::buildEntityDescriptor();
+    auto_ptr_XMLCh temp(entityID);
+    entity->setEntityID(temp.get());
+    return entity;
+}