Various export enhancements and fixes, including:

- A new SPExportFile class, providing an abstract interface to the handling and creation of export files.
- Enables the centralisation of all file/file handle creation logic as well as better support for handling situations where files fail to be created, including files that already exist at the export location.
- New SPExportFileHandleStatus constants to support the reporting of file handle creation.
- Update SPExporter to use the new file class instead of directly using an instance of SPFileHandle.
- Add the necessary logic to deal with files that already exist on disk, by providing the user with 3 options: cancel the export, ignore the files in question or overwrite them. We might want to enhance this to make new files sequential in name to prevent overwriting. Fixes issue #742.
- New SPExportFileUtilities category, which centralises all the logic relating to writing export type headers as well as dealing with problems occurred during file/file handle creation.
- Improve feedback given on the export progress sheet during export initialisation.
- Tidy up and improve comments.

1 files changed, 47 insertions, 60 deletions

diff --git a/Source/SPSQLExporter.h b/Source/SPSQLExporter.h
index 43ba0172..58203feb 100644
--- a/Source/SPSQLExporter.h
+++ b/Source/SPSQLExporter.h
@@ -40,106 +40,93 @@
 {
 	NSObject <SPSQLExporterProtocol> *delegate;
 	
-	/**
-	 * Tables
-	 */
 	NSArray *sqlExportTables;
-	
-	/**
-	 * Database host
-	 */
+
 	NSString *sqlDatabaseHost;
-	
-	/**
-	 * Database name
-	 */
 	NSString *sqlDatabaseName;
-	
-	/**
-	 * Database version
-	 */
 	NSString *sqlDatabaseVersion;
-	
-	/**
-	 * Current table
-	 */
 	NSString *sqlExportCurrentTable;
-	
-	/**
-	 * Export errors
-	 */
 	NSString *sqlExportErrors;
 	
-	/**
-	 * Include UTF-8 BOM
-	 */
 	BOOL sqlOutputIncludeUTF8BOM;
-	
-	/**
-	 * Encode BLOB fields as Hex data
-	 */
 	BOOL sqlOutputEncodeBLOBasHex;
-	
-	/**
-	 * Include export errors
-	 */
 	BOOL sqlOutputIncludeErrors;
 	
-	/**
-	 * New INSERT statement divider
-	 */
 	SPSQLExportInsertDivider sqlInsertDivider;
 
-	/**
-	 * Number of tables processed by exporter
-	 */
 	NSUInteger sqlCurrentTableExportIndex;
-	
-	/**
-	 * The value after which a new INSERT statement should be created.
-	 */
 	NSUInteger sqlInsertAfterNValue;
-	
-	/**
-	 * Table information fetcher and parser
-	 */
+
 	SPTableData *sqlTableDataInstance;
 }
 
+/**
+ * @property delegate Exporter delegate
+ */
 @property(readwrite, assign) NSObject *delegate;
 
+/**
+ * @property sqlExportTables Tables
+ */
 @property(readwrite, retain) NSArray *sqlExportTables;
 
+/**
+ * @property sqlDatabaseHost Database host
+ */
 @property(readwrite, retain) NSString *sqlDatabaseHost;
+
+/**
+ * @property sqlDatabaseName Database name
+ */
 @property(readwrite, retain) NSString *sqlDatabaseName;
+
+/**
+ * @property sqlDatabaseVersion Database version
+ */
 @property(readwrite, retain) NSString *sqlDatabaseVersion;
 
+/**
+ * @property sqlExportCurrentTable Current table
+ */
 @property(readwrite, retain) NSString *sqlExportCurrentTable;
+
+/**
+ * @property sqlExportErrors Export errors
+ */
 @property(readwrite, retain) NSString *sqlExportErrors;
 
+/**
+ * @property sqlOutputIncludeUTF8BOM Include UTF-8 BOM
+ */
 @property(readwrite, assign) BOOL sqlOutputIncludeUTF8BOM;
+
+/**
+ * @property sqlOutputEncodeBLOBasHex Encode BLOB fields as Hex data
+ */
 @property(readwrite, assign) BOOL sqlOutputEncodeBLOBasHex;
+
+/**
+ * @property sqlOutputIncludeErrors Include export errors
+ */
 @property(readwrite, assign) BOOL sqlOutputIncludeErrors;
 
+/**
+ * @property sqlCurrentTableExportIndex Number of tables processed by exporter
+ */
 @property(readwrite, assign) NSUInteger sqlCurrentTableExportIndex;
-@property(readwrite, assign) NSUInteger sqlInsertAfterNValue;
-
-@property(readwrite, assign) SPSQLExportInsertDivider sqlInsertDivider;
 
 /**
- * Initialise an instance of SPSQLExporter using the supplied delegate.
- *
- * @param exportDelegate The exporter delegate
- *
- * @return The initialised instance
+ * @property sqlInsertAfterNValue The value after which a new INSERT statement should be created
  */
-- (id)initWithDelegate:(NSObject *)exportDelegate;
+@property(readwrite, assign) NSUInteger sqlInsertAfterNValue;
 
 /**
- * Returns whether or not any export errors occurred.
- *
- * @return A BOOL indicating the occurrence of errors
+ * @property sqlInsertDivider New INSERT statement divider
  */
+@property(readwrite, assign) SPSQLExportInsertDivider sqlInsertDivider;
+
+- (id)initWithDelegate:(NSObject *)exportDelegate;
+
 - (BOOL)didExportErrorsOccur;
 
 @end