public static string GetSubFieldValue
(
this RecordField field,
char code,
int occurrence
)
{
SubField result = field.GetSubField
(
code,
occurrence
);
return(ReferenceEquals(result, null)
? null
: result.Value);
}
// ==========================================================
public static bool HaveSubField
(
this RecordField field,
char code
)
{
SubFieldCollection subFields = field.SubFields;
int count = subFields.Length;
for (int i = 0; i < count; i++)
{
if (Utility.SameChar(subFields[i].Code, code))
{
return(true);
}
}
return(false);
}
public static bool HaveSubField
(
this RecordField field,
params char[] codes
)
{
SubFieldCollection subFields = field.SubFields;
int count = subFields.Length;
for (int i = 0; i < count; i++)
{
if (Utility.OneOf(subFields[i].Code, codes))
{
return(true);
}
}
return(false);
}
public static RecordField SetSubField
(
this RecordField field,
char code,
string value
)
{
SubField subField = field.SubFields
.Cast <SubField>()
.FirstOrDefault(sub => Utility.SameChar(code, sub.Code));
if (ReferenceEquals(subField, null))
{
subField = new SubField {
Code = code
};
field.SubFields.Add(subField);
}
subField.Value = value;
return(field);
}
internal static void ParseSingle(MarcRecord record,
string[] text)
{
char[] delimiters = { '#' };
string line = text[0];
string[] parts = Utility.SplitString(delimiters, line);
record.Mfn = int.Parse(parts[0]);
if (parts.Length != 1)
{
record.Status = int.Parse(parts[1]);
}
line = text[1];
parts = line.Split(delimiters);
record.Version = int.Parse(parts[1]);
for (int i = 2; i < text.Length; i++)
{
RecordField field = RecordField.Parse(text[i]);
record.Fields.Add(field);
}
}
public static RecordField ReplaceSubField
(
this RecordField field,
char code,
string oldValue,
string newValue
)
{
var found = field.SubFields
.Cast <SubField>()
.Where
(
subField => Utility.SameChar(code, subField.Code) &&
Utility.SameString(oldValue, subField.Value)
);
foreach (SubField subField in found)
{
subField.Value = newValue;
}
return(field);
}
internal static RecordField Parse(string line)
{
StringReader reader = new StringReader(line);
RecordField result
= new RecordField(Utility.ReadTo(reader, '#'));
result.Value = Utility.ReadTo(reader, '^');
while (true)
{
int next = reader.Read();
if (next < 0)
{
break;
}
char code = char.ToLower((char)next);
string value = Utility.ReadTo(reader, '^');
SubField subField = new SubField();
subField.Code = code;
subField.Value = value;
result.SubFields.Add(subField);
}
return(result);
}
public static SubField GetSubField
(
this RecordField field,
char code,
int occurrence
)
{
SubFieldCollection subFields = field.SubFields;
int count = subFields.Length;
for (int i = 0; i < count; i++)
{
if (Utility.SameChar(subFields[i].Code, code))
{
if (occurrence == 0)
{
return(subFields[i]);
}
occurrence--;
}
}
return(null);
}
public void Remove(RecordField item)
{
_list.Remove(item);
}
public void Add(RecordField item)
{
_list.Add(item);
}