1 /* $Id: filter_record_transform.cpp,v 1.2 2006-10-04 11:21:47 marc Exp $
2 Copyright (c) 2005-2006, Index Data.
4 See the LICENSE file for details
9 #include "filter_record_transform.hpp"
10 #include "package.hpp"
12 #include "gduutil.hpp"
13 #include "xmlutil.hpp"
16 #include <yaz/retrieval.h>
18 //#include <boost/thread/mutex.hpp>
22 namespace mp = metaproxy_1;
23 namespace yf = mp::filter;
25 namespace metaproxy_1 {
27 class RecordTransform::Impl {
31 void process(metaproxy_1::Package & package) const;
32 void configure(const xmlNode * xml_node);
34 yaz_retrieval_t m_retrieval;
39 // define Pimpl wrapper forwarding to Impl
41 yf::RecordTransform::RecordTransform() : m_p(new Impl)
45 yf::RecordTransform::~RecordTransform()
46 { // must have a destructor because of boost::scoped_ptr
49 void yf::RecordTransform::configure(const xmlNode *xmlnode)
51 m_p->configure(xmlnode);
54 void yf::RecordTransform::process(mp::Package &package) const
56 m_p->process(package);
60 // define Implementation stuff
64 yf::RecordTransform::Impl::Impl()
66 m_retrieval = yaz_retrieval_create();
70 yf::RecordTransform::Impl::~Impl()
73 yaz_retrieval_destroy(m_retrieval);
76 void yf::RecordTransform::Impl::configure(const xmlNode *xml_node)
78 //const char *srcdir = getenv("srcdir");
80 // yaz_retrieval_set_path(m_retrieval, srcdir);
83 throw mp::XMLError("RecordTransform filter config: empty XML DOM");
85 // parsing down to retrieval node, which can be any of the children nodes
86 xmlNode *retrieval_node;
87 for (retrieval_node = xml_node->children;
89 retrieval_node = retrieval_node->next)
91 if (retrieval_node->type != XML_ELEMENT_NODE)
93 if (0 == strcmp((const char *) retrieval_node->name, "retrievalinfo"))
98 if ( 0 != yaz_retrieval_configure(m_retrieval, retrieval_node)){
99 std::string msg("RecordTransform filter config: ");
100 msg += yaz_retrieval_get_error(m_retrieval);
101 throw mp::XMLError(msg);
105 void yf::RecordTransform::Impl::process(mp::Package &package) const
108 Z_GDU *gdu_req = package.request().get();
110 // only working on z3950 present packages
112 || !(gdu_req->which == Z_GDU_Z3950)
113 || !(gdu_req->u.z3950->which == Z_APDU_presentRequest))
119 // getting original present request
120 Z_PresentRequest *pr = gdu_req->u.z3950->u.presentRequest;
122 // setting up ODR's for memory during encoding/decoding
123 //mp::odr odr_de(ODR_DECODE);
124 mp::odr odr_en(ODR_ENCODE);
126 // now re-insructing the z3950 backend present request
128 // z3950'fy record syntax
130 if(pr->preferredRecordSyntax){
131 (pr->preferredRecordSyntax)
132 = yaz_str_to_z3950oid(odr_en, CLASS_RECSYN, "xml");
134 // = yaz_oidval_to_z3950oid (odr_en, CLASS_RECSYN, VAL_TEXT_XML);
136 // Odr_oid *yaz_str_to_z3950oid (ODR o, int oid_class,
138 // const char *yaz_z3950oid_to_str (Odr_oid *oid, int *oid_class);
141 // z3950'fy record schema
144 // pr->recordComposition
145 // = (Z_RecordComposition *)
146 // odr_malloc(odr_en, sizeof(Z_RecordComposition));
147 // pr->recordComposition->which
148 // = Z_RecordComp_simple;
149 // pr->recordComposition->u.simple
150 // = build_esn_from_schema(odr_en,
151 // (const char *) sr_req->recordSchema);
154 // attaching Z3950 package to filter chain
155 package.request() = gdu_req;
157 // std::cout << "z3950_present_request " << *apdu << "\n";
162 //check successful Z3950 present response
163 Z_GDU *gdu_res = package.response().get();
164 if (!gdu_res || gdu_res->which != Z_GDU_Z3950
165 || gdu_res->u.z3950->which != Z_APDU_presentResponse
166 || !gdu_res->u.z3950->u.presentResponse)
169 std::cout << "record-transform: error back present\n";
170 package.session().close();
175 // everything fine, continuing
176 // std::cout << "z3950_present_request OK\n";
177 // std::cout << "back z3950 " << *gdu_res << "\n";
184 static mp::filter::Base* filter_creator()
186 return new mp::filter::RecordTransform;
190 struct metaproxy_1_filter_struct metaproxy_1_filter_record_transform = {
201 * indent-tabs-mode: nil
202 * c-file-style: "stroustrup"
204 * vim: shiftwidth=4 tabstop=8 expandtab