shibsp/attribute/resolver/impl/ChainingAttributeExtractor.cpp

   1 /*
   2  *  Copyright 2001-2009 Internet2
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 /**
  18  * ChainingAttributeExtractor.cpp
  19  *
  20  * Chains together multiple AttributeExtractor plugins.
  21  */
  22
  23 #include "internal.h"
  24 #include "Application.h"
  25 #include "ServiceProvider.h"
  26 #include "attribute/Attribute.h"
  27 #include "attribute/resolver/AttributeExtractor.h"
  28
  29 #include <xercesc/util/XMLUniDefs.hpp>
  30 #include <xmltooling/util/XMLHelper.h>
  31
  32 using namespace shibsp;
  33 using namespace opensaml::saml2md;
  34 using namespace xmltooling;
  35 using namespace std;
  36
  37 namespace shibsp {
  38
  39     class SHIBSP_DLLLOCAL ChainingAttributeExtractor : public AttributeExtractor
  40     {
  41     public:
  42         ChainingAttributeExtractor(const DOMElement* e);
  43         virtual ~ChainingAttributeExtractor() {
  44             for_each(m_extractors.begin(), m_extractors.end(), xmltooling::cleanup<AttributeExtractor>());
  45         }
  46
  47         Lockable* lock() {
  48             return this;
  49         }
  50         void unlock() {
  51         }
  52
  53         void extractAttributes(
  54             const Application& application,
  55             const RoleDescriptor* issuer,
  56             const XMLObject& xmlObject,
  57             vector<Attribute*>& attributes
  58             ) const;
  59
  60         void getAttributeIds(vector<string>& attributes) const {
  61             for (vector<AttributeExtractor*>::const_iterator i=m_extractors.begin(); i!=m_extractors.end(); ++i) {
  62                 Locker locker(*i);
  63                 (*i)->getAttributeIds(attributes);
  64             }
  65         }
  66
  67     private:
  68         vector<AttributeExtractor*> m_extractors;
  69     };
  70
  71     static const XMLCh _AttributeExtractor[] =  UNICODE_LITERAL_18(A,t,t,r,i,b,u,t,e,E,x,t,r,a,c,t,o,r);
  72     static const XMLCh _type[] =                UNICODE_LITERAL_4(t,y,p,e);
  73
  74     SHIBSP_DLLLOCAL PluginManager<AttributeExtractor,string,const DOMElement*>::Factory XMLAttributeExtractorFactory;
  75     SHIBSP_DLLLOCAL PluginManager<AttributeExtractor,string,const DOMElement*>::Factory DelegationAttributeExtractorFactory;
  76     AttributeExtractor* SHIBSP_DLLLOCAL ChainingExtractorFactory(const DOMElement* const & e)
  77     {
  78         return new ChainingAttributeExtractor(e);
  79     }
  80 };
  81
  82 void SHIBSP_API shibsp::registerAttributeExtractors()
  83 {
  84     SPConfig::getConfig().AttributeExtractorManager.registerFactory(DELEGATION_ATTRIBUTE_EXTRACTOR, DelegationAttributeExtractorFactory);
  85     SPConfig::getConfig().AttributeExtractorManager.registerFactory(XML_ATTRIBUTE_EXTRACTOR, XMLAttributeExtractorFactory);
  86     SPConfig::getConfig().AttributeExtractorManager.registerFactory(CHAINING_ATTRIBUTE_EXTRACTOR, ChainingExtractorFactory);
  87 }
  88
  89 ChainingAttributeExtractor::ChainingAttributeExtractor(const DOMElement* e)
  90 {
  91     SPConfig& conf = SPConfig::getConfig();
  92
  93     // Load up the chain of handlers.
  94     e = e ? XMLHelper::getFirstChildElement(e, _AttributeExtractor) : NULL;
  95     while (e) {
  96         auto_ptr_char type(e->getAttributeNS(NULL,_type));
  97         if (type.get() && *(type.get())) {
  98             try {
  99                 m_extractors.push_back(conf.AttributeExtractorManager.newPlugin(type.get(),e));
 100             }
 101             catch (exception& ex) {
 102                 Category::getInstance(SHIBSP_LOGCAT".AttributeExtractor.Chaining").error(
 103                     "caught exception processing embedded AttributeExtractor element: %s", ex.what()
 104                     );
 105             }
 106         }
 107         e = XMLHelper::getNextSiblingElement(e, _AttributeExtractor);
 108     }
 109 }
 110
 111 void ChainingAttributeExtractor::extractAttributes(
 112     const Application& application, const RoleDescriptor* issuer, const XMLObject& xmlObject, vector<Attribute*>& attributes
 113     ) const
 114 {
 115     for (vector<AttributeExtractor*>::const_iterator i=m_extractors.begin(); i!=m_extractors.end(); ++i) {
 116         Locker locker(*i);
 117         (*i)->extractAttributes(application, issuer, xmlObject, attributes);
 118     }
 119 }