1 /* $Id: filter_record_transform.cpp,v 1.1 2006-10-03 14:04:22 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"
16 //#include <boost/thread/mutex.hpp>
20 namespace mp = metaproxy_1;
21 namespace yf = mp::filter;
23 namespace metaproxy_1 {
25 class RecordTransform::Impl {
29 void process(metaproxy_1::Package & package) const;
30 void configure(const xmlNode * xml_node);
37 // define Pimpl wrapper forwarding to Impl
39 yf::RecordTransform::RecordTransform() : m_p(new Impl)
43 yf::RecordTransform::~RecordTransform()
44 { // must have a destructor because of boost::scoped_ptr
47 void yf::RecordTransform::configure(const xmlNode *xmlnode)
49 m_p->configure(xmlnode);
52 void yf::RecordTransform::process(mp::Package &package) const
54 m_p->process(package);
58 // define Implementation stuff
62 yf::RecordTransform::Impl::Impl()
66 yf::RecordTransform::Impl::~Impl()
70 void yf::RecordTransform::Impl::configure(const xmlNode *xml_node)
72 // for (xml_node = xml_node->children; xml_node; xml_node = xml_node->next)
74 // if (xml_node->type != XML_ELEMENT_NODE)
76 // if (!strcmp((const char *) xml_node->name, "target"))
78 // std::string route = mp::xml::get_route(xml_node);
79 // std::string target = mp::xml::get_text(xml_node);
80 // std::cout << "route=" << route << " target=" << target << "\n";
81 // m_p->m_target_route[target] = route;
83 // else if (!strcmp((const char *) xml_node->name, "hideunavailable"))
85 // m_p->m_hide_unavailable = true;
89 // throw mp::filter::FilterException
91 // + std::string((const char *) xml_node->name)
92 // + " in virt_db filter");
97 void yf::RecordTransform::Impl::process(mp::Package &package) const
100 Z_GDU *gdu = package.request().get();
102 // only working on z3950 present packages
104 || !(gdu->which == Z_GDU_Z3950)
105 || !(gdu->u.z3950->which == Z_APDU_presentRequest))
111 // getting original present request
112 Z_PresentRequest *front_pr = gdu->u.z3950->u.presentRequest;
114 // setting up ODR's for memory during encoding/decoding
115 mp::odr odr_de(ODR_DECODE);
116 mp::odr odr_en(ODR_ENCODE);
118 // now packaging the z3950 backend present request
119 Package back_package(package.session(), package.origin());
120 back_package.copy_filter(package);
122 Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_presentRequest);
124 assert(apdu->u.presentRequest);
126 // z3950'fy start record position
128 // *(apdu->u.presentRequest->resultSetStartPoint)
131 // z3950'fy number of records requested
133 // *(apdu->u.presentRequest->numberOfRecordsRequested)
135 // z3950'fy record syntax
137 //(apdu->u.presentRequest->preferredRecordSyntax)
138 // = yaz_oidval_to_z3950oid (odr_en, CLASS_RECSYN, VAL_TEXT_XML);
140 // z3950'fy record schema
143 // apdu->u.presentRequest->recordComposition
144 // = (Z_RecordComposition *)
145 // odr_malloc(odr_en, sizeof(Z_RecordComposition));
146 // apdu->u.presentRequest->recordComposition->which
147 // = Z_RecordComp_simple;
148 // apdu->u.presentRequest->recordComposition->u.simple
149 // = build_esn_from_schema(odr_en,
150 // (const char *) sr_req->recordSchema);
153 // attaching Z3950 package to filter chain
154 back_package.request() = apdu;
156 // std::cout << "z3950_present_request " << *apdu << "\n";
158 // sending backend package
161 //check successful Z3950 present response
162 Z_GDU *back_gdu = back_package.response().get();
163 if (!back_gdu || back_gdu->which != Z_GDU_Z3950
164 || back_gdu->u.z3950->which != Z_APDU_presentResponse
165 || !back_gdu->u.z3950->u.presentResponse)
168 std::cout << "record-transform: error back present\n";
169 package.session().close();
174 // everything fine, continuing
175 // std::cout << "z3950_present_request OK\n";
176 // std::cout << "back z3950 " << *back_gdu << "\n";
183 static mp::filter::Base* filter_creator()
185 return new mp::filter::RecordTransform;
189 struct metaproxy_1_filter_struct metaproxy_1_filter_record_transform = {
200 * indent-tabs-mode: nil
201 * c-file-style: "stroustrup"
203 * vim: shiftwidth=4 tabstop=8 expandtab