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+//
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+// FMDatabaseAdditionsVariadic.swift
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+// FMDB
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+//
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+
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+import Foundation
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+
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+extension FMDatabase {
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+
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+ /// Private generic function used for the variadic renditions of the FMDatabaseAdditions methods
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+ ///
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+ /// :param: sql The SQL statement to be used.
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+ /// :param: values The NSArray of the arguments to be bound to the ? placeholders in the SQL.
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+ /// :param: completionHandler The closure to be used to call the appropriate FMDatabase method to return the desired value.
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+ ///
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+ /// :returns: This returns the T value if value is found. Returns nil if column is NULL or upon error.
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+
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+ private func valueForQuery<T>(sql: String, values: NSArray?, completionHandler:(FMResultSet)->(T!)) -> T! {
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+ var result: T!
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+
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+ if let rs = executeQuery(sql, withArgumentsInArray: values) {
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+ if rs.next() {
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+ let obj = rs.objectForColumnIndex(0) as NSObject
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+ if !(obj is NSNull) {
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+ result = completionHandler(rs)
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+ }
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+ }
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+ rs.close()
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+ }
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+
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+ return result
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+ }
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+
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+ /// This is a rendition of stringForQuery that handles Swift variadic parameters
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+ /// for the values to be bound to the ? placeholders in the SQL.
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+ ///
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+ /// :param: sql The SQL statement to be used.
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+ /// :param: values The values to be bound to the ? placeholders
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+ ///
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+ /// :returns: This returns string value if value is found. Returns nil if column is NULL or upon error.
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+
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+ func stringForQuery(sql: String, _ values: AnyObject...) -> String! {
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+ return valueForQuery(sql, values: values as NSArray) { $0.stringForColumnIndex(0) }
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+ }
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+
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+ /// This is a rendition of intForQuery that handles Swift variadic parameters
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+ /// for the values to be bound to the ? placeholders in the SQL.
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+ ///
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+ /// :param: sql The SQL statement to be used.
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+ /// :param: values The values to be bound to the ? placeholders
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+ ///
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+ /// :returns: This returns integer value if value is found. Returns nil if column is NULL or upon error.
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+
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+ func intForQuery(sql: String, _ values: AnyObject...) -> Int32! {
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+ return valueForQuery(sql, values: values as NSArray) { $0.intForColumnIndex(0) }
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+ }
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+
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+ /// This is a rendition of longForQuery that handles Swift variadic parameters
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+ /// for the values to be bound to the ? placeholders in the SQL.
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+ ///
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+ /// :param: sql The SQL statement to be used.
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+ /// :param: values The values to be bound to the ? placeholders
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+ ///
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+ /// :returns: This returns long value if value is found. Returns nil if column is NULL or upon error.
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+
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+ func longForQuery(sql: String, _ values: AnyObject...) -> Int! {
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+ return valueForQuery(sql, values: values as NSArray) { $0.longForColumnIndex(0) }
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+ }
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+
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+ /// This is a rendition of boolForQuery that handles Swift variadic parameters
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+ /// for the values to be bound to the ? placeholders in the SQL.
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+ ///
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+ /// :param: sql The SQL statement to be used.
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+ /// :param: values The values to be bound to the ? placeholders
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+ ///
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+ /// :returns: This returns Bool value if value is found. Returns nil if column is NULL or upon error.
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+
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+ func boolForQuery(sql: String, _ values: AnyObject...) -> Bool! {
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+ return valueForQuery(sql, values: values as NSArray) { $0.boolForColumnIndex(0) }
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+ }
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+
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+ /// This is a rendition of doubleForQuery that handles Swift variadic parameters
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+ /// for the values to be bound to the ? placeholders in the SQL.
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+ ///
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+ /// :param: sql The SQL statement to be used.
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+ /// :param: values The values to be bound to the ? placeholders
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+ ///
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+ /// :returns: This returns Double value if value is found. Returns nil if column is NULL or upon error.
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+
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+ func doubleForQuery(sql: String, _ values: AnyObject...) -> Double! {
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+ return valueForQuery(sql, values: values as NSArray) { $0.doubleForColumnIndex(0) }
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+ }
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+
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+ /// This is a rendition of dateForQuery that handles Swift variadic parameters
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+ /// for the values to be bound to the ? placeholders in the SQL.
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+ ///
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+ /// :param: sql The SQL statement to be used.
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+ /// :param: values The values to be bound to the ? placeholders
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+ ///
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+ /// :returns: This returns NSDate value if value is found. Returns nil if column is NULL or upon error.
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+
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+ func dateForQuery(sql: String, _ values: AnyObject...) -> NSDate! {
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+ return valueForQuery(sql, values: values as NSArray) { $0.dateForColumnIndex(0) }
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+ }
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+
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+ /// This is a rendition of dataForQuery that handles Swift variadic parameters
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+ /// for the values to be bound to the ? placeholders in the SQL.
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+ ///
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+ /// :param: sql The SQL statement to be used.
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+ /// :param: values The values to be bound to the ? placeholders
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+ ///
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+ /// :returns: This returns NSData value if value is found. Returns nil if column is NULL or upon error.
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+
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+ func dataForQuery(sql: String, _ values: AnyObject...) -> NSData! {
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+ return valueForQuery(sql, values: values as NSArray) { $0.dataForColumnIndex(0) }
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+ }
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+}
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August Mueller