// 根据 query string，获得指定一期的期记录数量
// query string 是调用前从册记录中 volume 等字段综合取得的
// parameters:
// strBiblioPath 书目记录路径
// strQueryString 检索词。例如 “2005|1|1000|50”。格式为 年|期号|总期号|卷号。一般为 年|期号| 即可。
public static int GetIssueCount(this LibraryChannel channel,
DigitalPlatform.Stop stop,
string strBiblioRecPath,
string strQueryString,
out string strError)
{
strError = "";
string strBiblioRecordID = StringUtil.GetRecordId(strBiblioRecPath);
string strStyle = "query:父记录+期号|" + strBiblioRecordID + "|" + strQueryString;
DigitalPlatform.LibraryClient.localhost.EntityInfo[] issueinfos = null;
long lRet = channel.GetIssues(stop,
strBiblioRecPath,
0,
1,
strStyle,
channel.Lang,
out issueinfos,
out strError);
if (lRet == -1)
{
return(-1);
}
return((int)lRet);
}
// 获得指定一期的封面图片 URI
// parameters:
// strBiblioPath 书目记录路径
// strQueryString 检索词。例如 “2005|1|1000|50”。格式为 年|期号|总期号|卷号。一般为 年|期号| 即可。
public static int GetIssueCoverImageUri(this LibraryChannel channel,
DigitalPlatform.Stop stop,
string strBiblioRecPath,
string strQueryString,
string strPreferredType,
out string strUri,
out string strError)
{
strUri = "";
strError = "";
string strBiblioRecordID = StringUtil.GetRecordId(strBiblioRecPath);
string strStyle = "query:父记录+期号|" + strBiblioRecordID + "|" + strQueryString;
DigitalPlatform.LibraryClient.localhost.EntityInfo[] issueinfos = null;
long lRet = channel.GetIssues(stop,
strBiblioRecPath,
0,
1,
strStyle,
channel.Lang,
out issueinfos,
out strError);
if (lRet == -1)
{
return(-1);
}
if (lRet == 0)
{
return(0); // not found
}
EntityInfo info = issueinfos[0];
string strXml = info.OldRecord;
string strIssueRecordPath = info.OldRecPath;
if (string.IsNullOrEmpty(strXml))
{
strError = "期记录 '" + strIssueRecordPath + "' 的 strXml 为空";
return(-1);
}
XmlDocument dom = new XmlDocument();
try
{
dom.LoadXml(strXml);
}
catch (Exception ex)
{
strError = "期记录 '" + strIssueRecordPath + "' XML 装入 DOM 时出错: " + ex.Message;
return(-1);
}
string strObjectID = dp2StringUtil.GetCoverImageIDFromIssueRecord(dom, strPreferredType);
if (string.IsNullOrEmpty(strObjectID))
{
return(0);
}
strUri = strIssueRecordPath + "/object/" + strObjectID;
return(1);
}
public static int OutputEntities(
Stop stop,
LibraryChannel channel,
string strBiblioRecPath,
string strDbType,
XmlTextWriter writer,
out string strError)
{
strError = "";
bool bBegin = false;
long lPerCount = 100; // 每批获得多少个
long lStart = 0;
long lResultCount = 0;
long lCount = -1;
for (; ; )
{
if (stop != null && stop.State != 0)
{
strError = "用户中断";
return -1;
}
EntityInfo[] entities = null;
long lRet = 0;
channel.Timeout = new TimeSpan(0, 5, 0);
if (strDbType == "item")
{
lRet = channel.GetEntities(
stop,
strBiblioRecPath,
lStart,
lCount,
"", // "onlygetpath",
"zh",
out entities,
out strError);
}
if (strDbType == "order")
{
lRet = channel.GetOrders(
stop,
strBiblioRecPath,
lStart,
lCount,
"", // "onlygetpath",
"zh",
out entities,
out strError);
}
if (strDbType == "issue")
{
lRet = channel.GetIssues(
stop,
strBiblioRecPath,
lStart,
lCount,
"", // "onlygetpath",
"zh",
out entities,
out strError);
}
if (strDbType == "comment")
{
lRet = channel.GetComments(
stop,
strBiblioRecPath,
lStart,
lCount,
"", // "onlygetpath",
"zh",
out entities,
out strError);
}
if (lRet == -1)
return -1;
lResultCount = lRet;
if (lRet == 0)
return 0;
Debug.Assert(entities != null, "");
foreach (EntityInfo info in entities)
{
if (info.ErrorCode != ErrorCodeValue.NoError)
{
strError = "路径为 '" + info.OldRecPath + "' 的册记录装载中发生错误: " + info.ErrorInfo; // NewRecPath
return -1;
}
if (bBegin == false)
{
writer.WriteStartElement("dprms", strDbType + "Collection", DpNs.dprms);
bBegin = true;
}
XmlDocument item_dom = new XmlDocument();
item_dom.LoadXml(info.OldRecord);
writer.WriteStartElement("dprms", strDbType, DpNs.dprms);
writer.WriteAttributeString("path", info.OldRecPath);
writer.WriteAttributeString("timestamp", ByteArray.GetHexTimeStampString(info.OldTimestamp));
DomUtil.RemoveEmptyElements(item_dom.DocumentElement);
item_dom.DocumentElement.WriteContentTo(writer);
writer.WriteEndElement();
}
lStart += entities.Length;
if (lStart >= lResultCount)
break;
if (lCount == -1)
lCount = lPerCount;
if (lStart + lCount > lResultCount)
lCount = lResultCount - lStart;
}
if (bBegin == true)
writer.WriteEndElement();
return 1;
}