/**
* Delete a subfield from the field.
*
* @param File_MARC_Subfield $subfield The subfield to delete
*
* @return bool Success or failure
*/
function deleteSubfield(File_MARC_Subfield $subfield)
{
if ($this->subfields->deleteNode($subfield)) {
return true;
}
return false;
}
/**
* Inserts a field in the MARC record relative to an existing field
*
* Inserts a {@link File_MARC_Control_Field} or {@link File_MARC_Data_Field}
* object before or after a specified existing field.
*
* <code>
* // Example: Insert a new field before the first 650 field
*
* // Create the new field
* $subfields[] = new File_MARC_Subfield('a', 'Scott, Daniel.');
* $new_field = new File_MARC_Data_Field('100', $subfields, 0, null);
*
* // Retrieve the target field for our insertion point
* $subject = $record->getFields('650');
*
* // Insert the new field
* if (is_array($subject)) {
* $record->insertField($new_field, $subject[0], true);
* }
* elseif ($subject) {
* $record->insertField($new_field, $subject, true);
* }
* </code>
*
* @param File_MARC_Field $new_field The field to add
* @param File_MARC_Field $existing_field The target field
* @param bool $before Insert the new field before the existing field if true, after the existing field if false
*
* @return File_MARC_Field The field that was added
*/
function insertField(File_MARC_Field $new_field, File_MARC_Field $existing_field, $before = false)
{
switch ($before) {
/* Insert before the specified field in the record */
case true:
$this->fields->insertNode($new_field, $existing_field, true);
break;
/* Insert after the specified field in the record */
/* Insert after the specified field in the record */
case false:
$this->fields->insertNode($new_field, $existing_field);
break;
default:
$errorMessage = File_MARC_Exception::formatError(File_MARC_Exception::$messages[File_MARC_Exception::ERROR_INSERTFIELD_MODE], array("mode" => $before));
throw new File_MARC_Exception($errorMessage, File_MARC_Exception::ERROR_INSERTFIELD_MODE);
}
return $new_field;
}
/**
* Delete a subfield from the field.
*
* @param File_MARC_Subfield $subfield The subfield to delete
*
* @return void
*/
function deleteSubfield(File_MARC_Subfield $subfield)
{
$this->subfields->deleteNode($subfield);
}