|
public Read_Metadata ( Stream Input_Stream, SobekCM_Item Return_Package, object>.Dictionary |
||
| Input_Stream | Stream | Open stream to read metadata from |
| Return_Package | SobekCM_Item | Package into which to read the metadata |
| Options | object>.Dictionary | Dictionary of any options which this metadata reader/writer may utilize |
| Error_Message | string | [OUTPUT] Explanation of the error, if an error occurs during reading |
| return | bool | |
/// <summary> Read the metadata file and enrich the existing bibliographic package </summary>
/// <param name="Data_File">Generic (unspecified) metadata file</param>
/// <param name="thisPackage">Bibliographic package to enrich</param>
public void Read(string Data_File, SobekCM_Item thisPackage)
{
// Many readers output an error message
string errorMessage;
// Does this filename have '.info.xml' in it?
if (Data_File.ToUpper().IndexOf(".INFO.XML") > 0)
{
INFO_File_ReaderWriter readInfo = new INFO_File_ReaderWriter();
readInfo.Read_Metadata(Data_File, thisPackage, null, out errorMessage);
return;
}
// Does this file have '.mets' in it?
if ((Data_File.ToUpper().IndexOf(".METS") > 0) || (Data_File.ToUpper().IndexOf(".PMETS") > 0))
{
METS_File_ReaderWriter readInfo = new METS_File_ReaderWriter();
readInfo.Read_Metadata(Data_File, thisPackage, null, out errorMessage);
return;
}
// If it made it here, it may be METS or MXF
if (Data_File.ToUpper().IndexOf(".XML") > 0)
{
// Read first couple lines
StreamReader reader = new StreamReader(Data_File);
string thisLine = reader.ReadLine();
while (thisLine != null)
{
// Is this MXF?
if (thisLine.ToUpper().Trim() == "<MXF>")
{
// Close the current connection
reader.Close();
// Read in the MXF file
MXF_File_ReaderWriter readInfo = new MXF_File_ReaderWriter();
readInfo.Read_Metadata(Data_File, thisPackage, null, out errorMessage);
return;
}
// Is this a METS declaration?
if (thisLine.ToUpper().IndexOf("<METS:") > 0)
{
// Close the current connection
reader.Close();
// Read in the METS file
METS_File_ReaderWriter readInfo = new METS_File_ReaderWriter();
readInfo.Read_Metadata(Data_File, thisPackage, null, out errorMessage);
return;
}
// Read the next line
thisLine = reader.ReadLine();
}
}
}
/// <summary> Read from an existing METS file and returns a new object</summary>
/// <param name="fileName">Name of the METS file</param>
/// <returns>Built SobekCM_Item object</returns>
public static SobekCM_Item Read_METS(string fileName)
{
SobekCM_Item returnVal = new SobekCM_Item();
// Save this to the METS file format
METS_File_ReaderWriter writer = new METS_File_ReaderWriter();
string Error_Message;
writer.Read_Metadata(fileName, returnVal, null, out Error_Message);
return returnVal;
}
/// <summary> Read from an existing METS file into the current object</summary>
/// <param name="fileName">Name of the METS file</param>
public void Read_From_METS(string fileName)
{
// Save this to the METS file format
METS_File_ReaderWriter writer = new METS_File_ReaderWriter();
string Error_Message;
writer.Read_Metadata(fileName, this, null, out Error_Message);
}
private SobekCM_Item Build_Item_From_METS(string METS_URL, string METS_Name, Custom_Tracer Tracer)
{
try
{
if (Tracer != null)
{
Tracer.Add_Trace("SobekCM_METS_Based_ItemBuilder.Build_Item_From_METS", "Open http web request stream to METS file ( <a href=\"" + METS_URL + "\">" + METS_Name + "</a> )");
}
SobekCM_Item thisPackage = new SobekCM_Item();
if (METS_URL.IndexOf("http:") >= 0)
{
WebRequest objRequest = WebRequest.Create(METS_URL);
objRequest.Timeout = 5000;
WebResponse objResponse = objRequest.GetResponse();
if (Tracer != null)
{
Tracer.Add_Trace("SobekCM_METS_Based_ItemBuilder.Build_Item_From_METS", "Read the METS file from the stream");
}
// Read the METS file and create the package
METS_File_ReaderWriter reader = new METS_File_ReaderWriter();
string errorMessage;
reader.Read_Metadata(objResponse.GetResponseStream(), thisPackage, null, out errorMessage);
objResponse.Close();
}
else
{
if (File.Exists(METS_URL.Replace("/", "\\")))
{
// Read the METS file and create the package
METS_File_ReaderWriter reader = new METS_File_ReaderWriter();
string errorMessage;
reader.Read_Metadata(METS_URL.Replace("/", "\\"), thisPackage, null, out errorMessage);
}
else
{
return null;
}
}
return thisPackage;
}
catch
{
return null;
}
}
