private MarcRecord(string strMarc)
{
this.ldr = new LDR(strMarc.Substring(0, LDR.LDRLength));
this.fields = new List<Field>();
string strAddress = strMarc.Substring(LDR.LDRLength, ldr.BaseAddress - LDR.LDRLength + 1);
string strData = strMarc.Substring(ldr.BaseAddress);
string[] strField = strData.Split(Field.FieldEnd);
for (int i = 0; i < strAddress.Length / AddressItemLength; i++)
{
string addressItem = strAddress.Substring(i * AddressItemLength, AddressItemLength);
string tag = addressItem.Substring(0, 3);
Field fld;
if (tag.Equals("-01") || tag.Equals("001") || tag.Equals("005"))
{
fld = new ControlField(tag, strField[i]);
}
else
{
fld = new DataField(tag, strField[i]);
}
fields.Add(fld);
}
}
/// <summary>
/// 生成新的Marc的record记录
/// </summary>
/// <param name="newLDR"></param>
/// <returns></returns>
public static MarcRecord NewRecord(string newLDR)
{
if (string.IsNullOrEmpty(newLDR))
return null;
if (newLDR.Length < LDR.LDRLength)
return null;
LDR ldr = new LDR(newLDR);
MarcRecord record = new MarcRecord(ldr);
return record;
}
private MarcRecord(LDR ldr)
{
this.ldr = ldr;
this.fields = new List<Field>();
}
/// <summary>
/// 由xml格式的marc生成record对象，marc的xml格式方案来自于TopEnginge
/// </summary>
/// <param name="xmlMarc"></param>
/// <returns></returns>
public static MarcRecord LoadFromXMlString(string xmlMarc)
{
XElement xe = XElement.Parse(xmlMarc);
string strldr = xe.Element("header").Value;
LDR ldr = new LDR(strldr);
MarcRecord record = new MarcRecord(ldr);
foreach(XElement fldxml in xe.Elements("field"))
{
Field fld;
string tag = fldxml.Attribute("name").Value;
if (tag.Equals("-01") || tag.Equals("001") || tag.Equals("005"))
{
fld = new ControlField(tag, fldxml.Value);
}
else
{
fld = new DataField(tag);
string indicator = fldxml.Attribute("indicator") == null ? string.Empty : fldxml.Attribute("indicator").Value;
foreach (XElement sfxml in fldxml.Elements("sf"))
{
((DataField)fld).AddSubField(sfxml.Attribute("name").Value[0], sfxml.Value);
}
}
record.AddField(fld);
}
return record;
}