// 根据书目库名(或者别名)获得检索途径名
// parameters:
// strOutputDbName 输出的数据库名。不是Z39.50服务器定义的别名，而是正规数据库名。
public string GetFromName(string strDbNameOrAlias,
long lAttributeValue,
out string strOutputDbName,
out string strError)
{
strError = "";
strOutputDbName = "";
// 因为XMLDOM中无法进行大小写不敏感的搜索，所以把搜索别名的这个任务交给properties
Debug.Assert(this.CfgDom != null, "");
BiblioDbProperty prop = this.GetDbProperty(strDbNameOrAlias, true);
if (prop == null)
{
strError = "名字或者别名为 '" + strDbNameOrAlias + "' 的数据库不存在";
return(null);
}
strOutputDbName = prop.DbName;
XmlNode nodeDatabase = this.CfgDom.DocumentElement.SelectSingleNode("//databases/database[@name='" + strOutputDbName + "']");
if (nodeDatabase == null)
{
strError = "名字为 '" + strOutputDbName + "' 的数据库不存在";
}
XmlNode nodeUse = nodeDatabase.SelectSingleNode("use[@value='" + lAttributeValue.ToString() + "']");
if (nodeUse == null)
{
strError = "数据库 '" + strDbNameOrAlias + "' 中没有找到关于 '" + lAttributeValue.ToString() + "' 的检索途径定义";
return(null);
}
string strFrom = DomUtil.GetAttr(nodeUse, "from");
if (String.IsNullOrEmpty(strFrom) == true)
{
strError = "数据库 '" + strDbNameOrAlias + "' <database>元素中关于 '" + lAttributeValue.ToString() + "' 的<use>配置缺乏from属性值";
return(null);
}
return(strFrom);
}
// 为数据库属性集合中增补需要从xml文件中获得的其他属性
int AppendDbProperties(out string strError)
{
strError = "";
// 增补MaxResultCount
if (this.CfgDom == null)
{
strError = "调用 GetBiblioDbProperties()以前，需要先初始化和装载CfgDom";
return(-1);
}
Debug.Assert(this.CfgDom != null, "");
for (int i = 0; i < this.BiblioDbProperties.Count; i++)
{
BiblioDbProperty prop = this.BiblioDbProperties[i];
string strDbName = prop.DbName;
XmlNode nodeDatabase = this.CfgDom.DocumentElement.SelectSingleNode("//databases/database[@name='" + strDbName + "']");
if (nodeDatabase == null)
{
continue;
}
// maxResultCount
// 获得整数型的属性参数值
// return:
// -1 出错。但是nValue中已经有了nDefaultValue值，可以不加警告而直接使用
// 0 正常获得明确定义的参数值
// 1 参数没有定义，因此代替以缺省参数值返回
int nRet = DomUtil.GetIntegerParam(nodeDatabase,
"maxResultCount",
-1,
out prop.MaxResultCount,
out strError);
if (nRet == -1)
{
strError = "为数据库 '" + strDbName + "' 配置的<databases/database>元素的" + strError;
return(-1);
}
// alias
prop.DbNameAlias = DomUtil.GetAttr(nodeDatabase, "alias");
// addField901
// 2007/12/16
nRet = DomUtil.GetBooleanParam(nodeDatabase,
"addField901",
false,
out prop.AddField901,
out strError);
if (nRet == -1)
{
strError = "为数据库 '" + strDbName + "' 配置的<databases/database>元素的" + strError;
return(-1);
}
}
return(0);
}
// 获得编目库属性列表
int GetBiblioDbProperties(out string strError)
{
strError = "";
try
{
this.BiblioDbProperties = new List <BiblioDbProperty>();
string strValue = "";
long lRet = Channel.GetSystemParameter(null,
"biblio",
"dbnames",
out strValue,
out strError);
if (lRet == -1)
{
strError = "针对服务器 " + Channel.Url + " 获得编目库名列表过程发生错误：" + strError;
goto ERROR1;
}
string[] biblioDbNames = strValue.Split(new char[] { ',' });
for (int i = 0; i < biblioDbNames.Length; i++)
{
BiblioDbProperty property = new BiblioDbProperty();
property.DbName = biblioDbNames[i];
this.BiblioDbProperties.Add(property);
}
// 获得语法格式
lRet = Channel.GetSystemParameter(null,
"biblio",
"syntaxs",
out strValue,
out strError);
if (lRet == -1)
{
strError = "针对服务器 " + Channel.Url + " 获得编目库数据格式列表过程发生错误：" + strError;
goto ERROR1;
}
string[] syntaxs = strValue.Split(new char[] { ',' });
if (syntaxs.Length != this.BiblioDbProperties.Count)
{
strError = "针对服务器 " + Channel.Url + " 获得编目库名为 " + this.BiblioDbProperties.Count.ToString() + " 个，而数据格式为 " + syntaxs.Length.ToString() + " 个，数量不一致";
goto ERROR1;
}
// 增补数据格式
for (int i = 0; i < this.BiblioDbProperties.Count; i++)
{
this.BiblioDbProperties[i].Syntax = syntaxs[i];
}
///
// 获得对应的实体库名
lRet = Channel.GetSystemParameter(null,
"item",
"dbnames",
out strValue,
out strError);
if (lRet == -1)
{
strError = "针对服务器 " + Channel.Url + " 获得实体库名列表过程发生错误：" + strError;
goto ERROR1;
}
string[] itemdbnames = strValue.Split(new char[] { ',' });
if (itemdbnames.Length != this.BiblioDbProperties.Count)
{
strError = "针对服务器 " + Channel.Url + " 获得编目库名为 " + this.BiblioDbProperties.Count.ToString() + " 个，而实体库名为 " + itemdbnames.Length.ToString() + " 个，数量不一致";
goto ERROR1;
}
// 增补数据格式
for (int i = 0; i < this.BiblioDbProperties.Count; i++)
{
this.BiblioDbProperties[i].ItemDbName = itemdbnames[i];
}
// 获得虚拟数据库名
lRet = Channel.GetSystemParameter(null,
"virtual",
"dbnames",
out strValue,
out strError);
if (lRet == -1)
{
strError = "针对服务器 " + Channel.Url + " 获得虚拟库名列表过程发生错误：" + strError;
goto ERROR1;
}
string[] virtualDbNames = strValue.Split(new char[] { ',' });
for (int i = 0; i < virtualDbNames.Length; i++)
{
BiblioDbProperty property = new BiblioDbProperty();
property.DbName = virtualDbNames[i];
property.IsVirtual = true;
this.BiblioDbProperties.Add(property);
}
}
finally
{
}
return(0);
ERROR1:
this.BiblioDbProperties = null;
return(-1);
}
// 获得编目库属性列表
int GetBiblioDbProperties(out string strError)
{
strError = "";
try
{
this.BiblioDbProperties = new List<BiblioDbProperty>();
string strValue = "";
long lRet = Channel.GetSystemParameter(null,
"biblio",
"dbnames",
out strValue,
out strError);
if (lRet == -1)
{
strError = "针对服务器 " + Channel.Url + " 获得编目库名列表过程发生错误：" + strError;
goto ERROR1;
}
string[] biblioDbNames = strValue.Split(new char[] { ',' });
for (int i = 0; i < biblioDbNames.Length; i++)
{
BiblioDbProperty property = new BiblioDbProperty();
property.DbName = biblioDbNames[i];
this.BiblioDbProperties.Add(property);
}
// 获得语法格式
lRet = Channel.GetSystemParameter(null,
"biblio",
"syntaxs",
out strValue,
out strError);
if (lRet == -1)
{
strError = "针对服务器 " + Channel.Url + " 获得编目库数据格式列表过程发生错误：" + strError;
goto ERROR1;
}
string[] syntaxs = strValue.Split(new char[] { ',' });
if (syntaxs.Length != this.BiblioDbProperties.Count)
{
strError = "针对服务器 " + Channel.Url + " 获得编目库名为 " + this.BiblioDbProperties.Count.ToString() + " 个，而数据格式为 " + syntaxs.Length.ToString() + " 个，数量不一致";
goto ERROR1;
}
// 增补数据格式
for (int i = 0; i < this.BiblioDbProperties.Count; i++)
{
this.BiblioDbProperties[i].Syntax = syntaxs[i];
}
///
// 获得对应的实体库名
lRet = Channel.GetSystemParameter(null,
"item",
"dbnames",
out strValue,
out strError);
if (lRet == -1)
{
strError = "针对服务器 " + Channel.Url + " 获得实体库名列表过程发生错误：" + strError;
goto ERROR1;
}
string[] itemdbnames = strValue.Split(new char[] { ',' });
if (itemdbnames.Length != this.BiblioDbProperties.Count)
{
strError = "针对服务器 " + Channel.Url + " 获得编目库名为 " + this.BiblioDbProperties.Count.ToString() + " 个，而实体库名为 " + itemdbnames.Length.ToString() + " 个，数量不一致";
goto ERROR1;
}
// 增补数据格式
for (int i = 0; i < this.BiblioDbProperties.Count; i++)
{
this.BiblioDbProperties[i].ItemDbName = itemdbnames[i];
}
// 获得虚拟数据库名
lRet = Channel.GetSystemParameter(null,
"virtual",
"dbnames",
out strValue,
out strError);
if (lRet == -1)
{
strError = "针对服务器 " + Channel.Url + " 获得虚拟库名列表过程发生错误：" + strError;
goto ERROR1;
}
string[] virtualDbNames = strValue.Split(new char[] { ',' });
for (int i = 0; i < virtualDbNames.Length; i++)
{
BiblioDbProperty property = new BiblioDbProperty();
property.DbName = virtualDbNames[i];
property.IsVirtual = true;
this.BiblioDbProperties.Add(property);
}
}
finally
{
}
return 0;
ERROR1:
this.BiblioDbProperties = null;
return -1;
}