1 /* $Id: filter_record_transform.cpp,v 1.3 2006-10-04 14:04:00 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;
24 namespace mp_util = metaproxy_1::util;
26 namespace metaproxy_1 {
28 class RecordTransform::Impl {
32 void process(metaproxy_1::Package & package) const;
33 void configure(const xmlNode * xml_node);
35 yaz_retrieval_t m_retrieval;
40 // define Pimpl wrapper forwarding to Impl
42 yf::RecordTransform::RecordTransform() : m_p(new Impl)
46 yf::RecordTransform::~RecordTransform()
47 { // must have a destructor because of boost::scoped_ptr
50 void yf::RecordTransform::configure(const xmlNode *xmlnode)
52 m_p->configure(xmlnode);
55 void yf::RecordTransform::process(mp::Package &package) const
57 m_p->process(package);
61 // define Implementation stuff
65 yf::RecordTransform::Impl::Impl()
67 m_retrieval = yaz_retrieval_create();
71 yf::RecordTransform::Impl::~Impl()
74 yaz_retrieval_destroy(m_retrieval);
77 void yf::RecordTransform::Impl::configure(const xmlNode *xml_node)
79 //const char *srcdir = getenv("srcdir");
81 // yaz_retrieval_set_path(m_retrieval, srcdir);
84 throw mp::XMLError("RecordTransform filter config: empty XML DOM");
86 // parsing down to retrieval node, which can be any of the children nodes
87 xmlNode *retrieval_node;
88 for (retrieval_node = xml_node->children;
90 retrieval_node = retrieval_node->next)
92 if (retrieval_node->type != XML_ELEMENT_NODE)
94 if (0 == strcmp((const char *) retrieval_node->name, "retrievalinfo"))
99 if ( 0 != yaz_retrieval_configure(m_retrieval, retrieval_node)){
100 std::string msg("RecordTransform filter config: ");
101 msg += yaz_retrieval_get_error(m_retrieval);
102 throw mp::XMLError(msg);
106 void yf::RecordTransform::Impl::process(mp::Package &package) const
109 Z_GDU *gdu_req = package.request().get();
111 // only working on z3950 present packages
113 || !(gdu_req->which == Z_GDU_Z3950)
114 || !(gdu_req->u.z3950->which == Z_APDU_presentRequest))
120 // getting original present request
121 Z_PresentRequest *pr = gdu_req->u.z3950->u.presentRequest;
123 // setting up ODR's for memory during encoding/decoding
124 //mp::odr odr_de(ODR_DECODE);
125 mp::odr odr_en(ODR_ENCODE);
127 // setting up variables for conversion state
128 yaz_record_conv_t rc = 0;
131 const char *input_schema = 0;
132 Odr_oid *input_syntax = 0;
134 if(pr->recordComposition){
136 = mp_util::record_composition_to_esn(pr->recordComposition);
138 if(pr->preferredRecordSyntax){
139 input_syntax = pr->preferredRecordSyntax;
142 const char *match_schema = 0;
143 int *match_syntax = 0;
145 const char *backend_schema = 0;
146 Odr_oid *backend_syntax = 0;
149 = yaz_retrieval_request(m_retrieval,
150 input_schema, input_syntax,
151 &match_schema, &match_syntax,
153 &backend_schema, &backend_syntax);
155 std::cout << "ret_code " << ret_code << "\n";
156 std::cout << "match " << (oid_getentbyoid(match_syntax))->desc << " " << match_schema << "\n";
157 std::cout << "backend " << (oid_getentbyoid(backend_syntax))->desc << " " << backend_schema << "\n";
160 // if (r == -1) /* error ? */
162 // const char *details = yaz_retrieval_get_error(
163 // assoc->server->retrieval);
165 // rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
167 // rr->errstring = odr_strdup(rr->stream, details);
170 // else if (r == 1 || r == 3)
172 // const char *details = input_schema;
173 // rr->errcode = YAZ_BIB1_ELEMENT_SET_NAMES_UNSUPP;
175 // rr->errstring = odr_strdup(rr->stream, details);
180 // rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
181 // if (input_syntax_raw)
183 // char oidbuf[OID_STR_MAX];
184 // oid_to_dotstring(input_syntax_raw, oidbuf);
185 // rr->errstring = odr_strdup(rr->stream, oidbuf);
191 // now re-insructing the z3950 backend present request
193 // z3950'fy record syntax
197 // = yaz_oidval_to_z3950oid (odr_en, CLASS_RECSYN, VAL_TEXT_XML);
199 // Odr_oid *yaz_str_to_z3950oid (ODR o, int oid_class,
201 // const char *yaz_z3950oid_to_str (Odr_oid *oid, int *oid_class);
204 // z3950'fy record schema
207 // pr->recordComposition
208 // = (Z_RecordComposition *)
209 // odr_malloc(odr_en, sizeof(Z_RecordComposition));
210 // pr->recordComposition->which
211 // = Z_RecordComp_simple;
212 // pr->recordComposition->u.simple
213 // = build_esn_from_schema(odr_en,
214 // (const char *) sr_req->recordSchema);
217 // attaching Z3950 package to filter chain
218 package.request() = gdu_req;
220 // std::cout << "z3950_present_request " << *apdu << "\n";
225 //check successful Z3950 present response
226 Z_GDU *gdu_res = package.response().get();
227 if (!gdu_res || gdu_res->which != Z_GDU_Z3950
228 || gdu_res->u.z3950->which != Z_APDU_presentResponse
229 || !gdu_res->u.z3950->u.presentResponse)
232 std::cout << "record-transform: error back present\n";
233 package.session().close();
238 // everything fine, continuing
239 // std::cout << "z3950_present_request OK\n";
240 // std::cout << "back z3950 " << *gdu_res << "\n";
242 // if (backend_schema)
244 // set_esn(&rr->comp, backend_schema, rr->stream->mem);
246 // if (backend_syntax)
248 // oident *oident_syntax = oid_getentbyoid(backend_syntax);
250 // rr->request_format_raw = backend_syntax;
252 // if (oident_syntax)
253 // rr->request_format = oident_syntax->value;
255 // rr->request_format = VAL_NONE;
259 // (*assoc->init->bend_fetch)(assoc->backend, rr);
260 // if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
261 // { /* post conversion must take place .. */
262 // WRBUF output_record = wrbuf_alloc();
263 // int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
266 // const char *details = yaz_record_conv_get_error(rc);
267 // rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
269 // rr->errstring = odr_strdup(rr->stream, details);
273 // rr->len = wrbuf_len(output_record);
274 // rr->record = odr_malloc(rr->stream, rr->len);
275 // memcpy(rr->record, wrbuf_buf(output_record), rr->len);
277 // wrbuf_free(output_record, 1);
281 // struct oident *oi = oid_getentbyoid(match_syntax);
282 // rr->output_format = oi ? oi->value : VAL_NONE;
283 // rr->output_format_raw = match_syntax;
286 // rr->schema = odr_strdup(rr->stream, match_schema);
293 static mp::filter::Base* filter_creator()
295 return new mp::filter::RecordTransform;
299 struct metaproxy_1_filter_struct metaproxy_1_filter_record_transform = {
310 * indent-tabs-mode: nil
311 * c-file-style: "stroustrup"
313 * vim: shiftwidth=4 tabstop=8 expandtab