// 检索
// 本函数每次调用前，最好调用一次 TryInitialize()
// parameters:
// strQuery Search() 专用的检索式。注意，不是一个检索词那么简单
// dbnames 一般是从 targetInfo.DbNames 里面获得。或者从中选择一个数据库名用在这里
// strPreferredRecordSyntax 一般是从 targetInfo.PreferredRecordSyntax 获得即可
// result.Value:
// -1 error
// 0 fail
// 1 succeed
// result.ResultCount:
// 命中结果集内记录条数 (当 result.Value 为 1 时)
public async Task <SearchResult> Search(
string strQuery,
Encoding queryTermEncoding,
string[] dbnames,
string strPreferredRecordSyntax,
string strResultSetName)
{
BerTree tree = new BerTree();
SEARCH_REQUEST struSearch_request = new SEARCH_REQUEST
{
m_dbnames = dbnames
};
Debug.Assert(struSearch_request.m_dbnames.Length != 0, "");
struSearch_request.m_strReferenceId = this._currentRefID;
struSearch_request.m_lSmallSetUpperBound = 0;
struSearch_request.m_lLargeSetLowerBound = 1;
struSearch_request.m_lMediumSetPresentNumber = 0;
struSearch_request.m_nReplaceIndicator = 1;
struSearch_request.m_strResultSetName = strResultSetName; // "default";
struSearch_request.m_strSmallSetElementSetNames = "";
struSearch_request.m_strMediumSetElementSetNames = "";
struSearch_request.m_strPreferredRecordSyntax = strPreferredRecordSyntax; // ZTargetControl.GetLeftValue(this.TargetInfo.PreferredRecordSyntax); // BerTree.MARC_SYNTAX;
struSearch_request.m_strQuery = strQuery;
struSearch_request.m_nQuery_type = 1;
struSearch_request.m_queryTermEncoding = queryTermEncoding;
// m_search_response.m_lErrorCode = 0;
byte[] baPackage = null;
try
{
// 这里可能抛出异常
tree.SearchRequest(struSearch_request,
out baPackage);
}
catch (Exception ex)
{
return(new SearchResult {
Value = -1, ErrorInfo = "CBERTree::SearchRequest() Exception: " + ex.Message
});
}
if (this._channel.Connected == false)
{
this.CloseConnection();
return(new SearchResult {
Value = -1, ErrorInfo = "socket尚未连接或者已经被关闭"
});
}
#if DUMPTOFILE
string strBinFile = this.MainForm.DataDir + "\\searchrequest.bin";
File.Delete(strBinFile);
DumpPackage(strBinFile,
baPackage);
string strLogFile = this.MainForm.DataDir + "\\searchrequest.txt";
File.Delete(strLogFile);
tree.m_RootNode.DumpToFile(strLogFile);
#endif
#if NO
nRet = CheckConnect(
out strError);
if (nRet == -1)
{
return(-1);
}
#endif
BerTree tree1 = new BerTree();
{
RecvResult result = await this._channel.SendAndRecv(
baPackage);
if (result.Value == -1)
{
return(new SearchResult(result));
}
#if NO
#if DEBUG
if (nRet == 0)
{
Debug.Assert(strError == "", "");
}
#endif
#endif
#if DUPMTOFILE
DeleteFile("searchresponse.bin");
DumpPackage("searchresponse.bin",
(char *)baOutPackage.GetData(),
baOutPackage.GetSize());
#endif
tree1.m_RootNode.BuildPartTree(result.Package,
0,
result.Package.Length,
out int nTotalLen);
}
SEARCH_RESPONSE search_response = new SEARCH_RESPONSE();
int nRet = BerTree.GetInfo_SearchResponse(tree1.GetAPDuRoot(),
ref search_response,
true,
out string strError);
if (nRet == -1)
{
return new SearchResult {
Value = -1, ErrorInfo = strError
}
}
;
#if DUMPTOFILE
DeleteFile("SearchResponse.txt");
tree1.m_RootNode.DumpDebugInfoToFile("SearchResponse.txt");
#endif
{
SearchResult result = new SearchResult();
result.ResultCount = (int)search_response.m_lResultCount;
if (search_response.m_nSearchStatus != 0) // 不一定是1
{
result.Value = 1;
return(result);
}
result.ErrorInfo = "Search Fail: diagRecords:\r\n" + search_response.m_diagRecords.GetMessage();
result.Value = 0; // search fail
return(result);
}
}
// return:
// -1 error
// 0 fail
// 1 succeed
int DoSearch(
ZConnection connection,
string strQuery,
Encoding queryTermEncoding,
string[] dbnames,
string strResultSetName,
out int nResultCount,
out string strError)
{
strError = "";
BerTree tree = new BerTree();
SEARCH_REQUEST struSearch_request = new SEARCH_REQUEST();
byte[] baPackage = null;
int nRet;
int nRecvLen;
//int nMax;
//int i;
// -->
BerTree tree1 = new BerTree();
int nTotlen = 0;
nResultCount = 0;
struSearch_request.m_dbnames = dbnames;
Debug.Assert(struSearch_request.m_dbnames.Length != 0, "");
struSearch_request.m_strReferenceId = this.CurrentRefID;
struSearch_request.m_lSmallSetUpperBound = 0;
struSearch_request.m_lLargeSetLowerBound = 1;
struSearch_request.m_lMediumSetPresentNumber = 0;
struSearch_request.m_nReplaceIndicator = 1;
struSearch_request.m_strResultSetName = strResultSetName; // "default";
struSearch_request.m_strSmallSetElementSetNames = "";
struSearch_request.m_strMediumSetElementSetNames = "";
struSearch_request.m_strPreferredRecordSyntax = ZTargetControl.GetLeftValue(this.comboBox_recordSyntax.Text); // this.CurrentTargetInfo.PreferredRecordSyntax; // BerTree.MARC_SYNTAX;
struSearch_request.m_strQuery = strQuery;
struSearch_request.m_nQuery_type = 1;
struSearch_request.m_queryTermEncoding = queryTermEncoding;
// m_search_response.m_lErrorCode = 0;
nRet = tree.SearchRequest(struSearch_request,
out baPackage);
if (nRet == -1)
{
strError = "CBERTree::SearchRequest() fail!";
return -1;
}
#if NOTCPIP
if (m_hSocket == INVALID_SOCKET) {
strError = "socket已经关闭!";
return -1;
}
#endif
#if DUMPTOFILE
string strBinFile = this.MainForm.DataDir + "\\searchrequest.bin";
File.Delete(strBinFile);
DumpPackage(strBinFile,
baPackage);
string strLogFile = this.MainForm.DataDir + "\\searchrequest.txt";
File.Delete(strLogFile);
tree.m_RootNode.DumpToFile(strLogFile);
#endif
nRet = CheckConnect(
connection,
out strError);
if (nRet == -1)
return -1;
/*
nRet = this.ZChannel.SendTcpPackage(
baPackage,
baPackage.Length,
out strError);
if (nRet == -1 || nRet == 1)
{
// CloseZAssociation();
return -1;
}
//AfxMessageBox("发送成功");
baPackage = null;
nRet = this.ZChannel.RecvTcpPackage(
out baPackage,
out nRecvLen,
out strError);
if (nRet == -1)
{
// CloseZAssociation();
return -1;
}
* */
byte [] baOutPackage = null;
nRet = connection.ZChannel.SendAndRecv(
baPackage,
out baOutPackage,
out nRecvLen,
out strError);
if (nRet == -1)
return -1;
#if DEBUG
if (nRet == 0)
{
Debug.Assert(strError == "", "");
}
#endif
#if DUPMTOFILE
DeleteFile("searchresponse.bin");
DumpPackage("searchresponse.bin",
(char *)baOutPackage.GetData(),
baOutPackage.GetSize());
#endif
tree1.m_RootNode.BuildPartTree(baOutPackage,
0,
baOutPackage.Length,
out nTotlen);
SEARCH_RESPONSE search_response = new SEARCH_RESPONSE();
nRet = BerTree.GetInfo_SearchResponse(tree1.GetAPDuRoot(),
ref search_response,
true,
out strError);
if (nRet == -1)
return -1;
#if DUMPTOFILE
DeleteFile("SearchResponse.txt");
tree1.m_RootNode.DumpDebugInfoToFile("SearchResponse.txt");
#endif
/*
nRet = FitDebugInfo_SearchResponse(&tree1,
strError);
if (nRet == -1) {
AfxMessageBox(strError);
return;
}
*/
nResultCount = (int)search_response.m_lResultCount;
if (search_response.m_nSearchStatus != 0) // 不一定是1
return 1;
strError = "Search Fail: diagRecords:\r\n" + search_response.m_diagRecords.GetMessage();
return 0; // search fail
}
