// 构造operator子树
// parameters:
int BldOperator(BerNode param,
int nType,
string strToken)
{
BerNode subparam = null;
// pSubparam = pParam->NewChildconstructedNode(1,ASN1_CONTEXT);
// 此层似乎为多余的，试试此语句注释掉以后的效果
// 2000/11/26 changed
subparam = param /*pSubparam*/.NewChildConstructedNode(BerTree.z3950_Operator,
ASN1_CONTEXT);
if (nType == TYPE_WITHIN)
{
BuildWithin(subparam, strToken);
}
else if (nType == TYPE_NEAR)
{
BuildNear(subparam, strToken);
}
else
{
BuildGeneral(subparam, strToken, nType);
}
return(0);
}
/*
* 发生未捕获的界面线程异常:
* Type: System.FormatException
* Message: 輸入字串格式不正確。
* Stack:
* 於 System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
* 於 System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
* 於 System.Int16.Parse(String s, NumberStyles style, NumberFormatInfo info)
* 於 System.Convert.ToInt16(String value)
* 於 DigitalPlatform.Z3950.PolandNode.HandleQuery(BerNode param, BerNode subparam, String strTerm, String strAttrType, String strAttrValue)
* 於 DigitalPlatform.Z3950.PolandNode.BldAttributesPlusTerm(BerNode param, String strToken)
* 於 DigitalPlatform.Z3950.PolandNode.BuildOperand(BerNode param, String strToken)
* 於 DigitalPlatform.Z3950.PolandNode.HandleOperand(String strToken)
* 於 DigitalPlatform.Z3950.PolandNode.ChangeRPNToTree()
* 於 DigitalPlatform.Z3950.PolandNode.ChangeOrgToRPN()
* 於 DigitalPlatform.Z3950.BerTree.make_type_1(String strQuery, Encoding queryTermEncoding, BerNode subroot)
* 於 DigitalPlatform.Z3950.BerTree.SearchRequest(SEARCH_REQUEST struSearch_request, Byte[]& baPackage)
* 於 dp2Catalog.ZConnection.DoSearchAsync()
* 於 dp2Catalog.ZConnection.ZConnection_InitialComplete(Object sender, EventArgs e)
* 於 dp2Catalog.ZConnection.BeginCommands(List`1 commands)
* 於 dp2Catalog.ZSearchForm.DoSearchOneServer(TreeNode nodeServerOrDatabase, String& strError)
* 於 dp2Catalog.ZSearchForm.DoSearch()
* 於 dp2Catalog.ZSearchForm.ProcessDialogKey(Keys keyData)
* 於 System.Windows.Forms.ContainerControl.ProcessDialogKey(Keys keyData)
* 於 System.Windows.Forms.SplitContainer.ProcessDialogKey(Keys keyData)
* 於 System.Windows.Forms.Control.ProcessDialogKey(Keys keyData)
* 於 System.Windows.Forms.ContainerControl.ProcessDialogKey(Keys keyData)
* 於 System.Windows.Forms.SplitContainer.ProcessDialogKey(Keys keyData)
* 於 System.Windows.Forms.Control.ProcessDialogKey(Keys keyData)
* 於 System.Windows.Forms.ContainerControl.ProcessDialogKey(Keys keyData)
* 於 System.Windows.Forms.SplitContainer.ProcessDialogKey(Keys keyData)
* 於 System.Windows.Forms.Control.ProcessDialogKey(Keys keyData)
* 於 System.Windows.Forms.ContainerControl.ProcessDialogKey(Keys keyData)
* 於 System.Windows.Forms.Control.ProcessDialogKey(Keys keyData)
* 於 System.Windows.Forms.TextBoxBase.ProcessDialogKey(Keys keyData)
* 於 System.Windows.Forms.Control.PreProcessMessage(Message& msg)
* 於 System.Windows.Forms.Control.PreProcessControlMessageInternal(Control target, Message& msg)
* 於 System.Windows.Forms.Application.ThreadContext.PreTranslateMessage(MSG& msg)
*
* */
// new version
// 处理term或AttributesList
// parameters:
void HandleQuery(BerNode param,
BerNode subparam,
string strTerm,
string strAttrType,
string strAttrValue)
{
BerNode seq = null;
seq = subparam.NewChildConstructedNode(
ASN1_SEQUENCE,
ASN1_UNIVERSAL);
// 处理term、attributeType或attributeValue
// 处理attributeType
try
{
Int16 i = Convert.ToInt16(strAttrType);
seq.NewChildIntegerNode(BerTree.z3950_AttributeType,
ASN1_CONTEXT,
BitConverter.GetBytes(i));
}
catch (Exception ex)
{
throw new Exception("strAttrType = '" + strAttrType + "' 应为数字。", ex);
}
// 处理attributeValue
try
{
Int16 i = Convert.ToInt16(strAttrValue);
seq.NewChildIntegerNode(BerTree.z3950_AttributeValue,
ASN1_CONTEXT,
BitConverter.GetBytes(i));
}
catch (Exception ex)
{
throw new Exception("strAttrValue = '" + strAttrValue + "' 应为数字。", ex);
}
// TODO: 为何这里被调用了两次?
// term
{
BerNode tempnode = param.NewChildCharNode(BerTree.z3950_Term, // 处理term
ASN1_CONTEXT,
//Encoding.GetEncoding(936).GetBytes(strTerm));
this.m_queryTermEncoding.GetBytes(strTerm));
tempnode.m_strDebugInfo = "term [" + strTerm + "]";
}
// return 0;
}
// 当算子为AttributesPlusTerm时
// parameters:
// return:
// NULL
// 其他
int BldAttributesPlusTerm(BerNode param,
string strToken)
{
BerNode subparam = null;
// string strQuery = "";
int three = 3;
string strTerm = "";
string strAttrType = "";
string strAttrValue = "";
param = param.NewChildConstructedNode(BerTree.z3950_AttributesPlusTerm,
ASN1_CONTEXT);
subparam = param.NewChildConstructedNode(
BerTree.z3950_AttributeList,
ASN1_CONTEXT);
DivideToken(strToken,
out strTerm,
out strAttrType,
out strAttrValue);
// 缺省值
if (strAttrType == "")
{
strAttrType = "1";
}
if (strAttrValue == "")
{
strAttrValue = "4";
}
/*
* strMessage.Format("term[%s] attrtype[%s] attrvalue[%s]",
* strTerm,
* strAttrType,
* strAttrValue);
*/
try
{
HandleQuery(param,
subparam,
strTerm,
strAttrType,
strAttrValue);
}
catch (Exception ex)
{
throw new Exception("BldAttributesPlusTerm() 处理 token '" + strToken + "' 过程中出现异常", ex);
}
if (strToken.IndexOf('/', 0) == -1)
{
BerNode seq = null;
seq = subparam.NewChildConstructedNode(
ASN1_SEQUENCE,
ASN1_UNIVERSAL);
// TRACE("pSeq->m_uTag=%d",pSeq->m_uTag);
seq.NewChildIntegerNode(BerTree.z3950_AttributeType,
ASN1_CONTEXT,
BitConverter.GetBytes((Int16)three)); /* position */
// 一样？
seq.NewChildIntegerNode(BerTree.z3950_AttributeValue,
ASN1_CONTEXT,
BitConverter.GetBytes((Int16)three)); /* position */
}
return(0);
}