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authorstuconnolly <stuart02@gmail.com>2012-09-26 07:23:08 +0000
committerstuconnolly <stuart02@gmail.com>2012-09-26 07:23:08 +0000
commit88263061eb326e58fe882bc91d09f52d3d49628d (patch)
treef16453cd3bc0afc429b7592a46a84196e775933d /Frameworks/PostgresKit/Source/FLXPostgresConnectionParameters.m
parent9e0da1ad71ea178867a8d3419f80a46b42c32d4c (diff)
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diff --git a/Frameworks/PostgresKit/Source/FLXPostgresConnectionParameters.m b/Frameworks/PostgresKit/Source/FLXPostgresConnectionParameters.m
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-//
-// $Id$
-//
-// FLXPostgresConnectionParameters.m
-// PostgresKit
-//
-// Created by Stuart Connolly (stuconnolly.com) on August 29, 2012.
-// Copyright (c) 2012 Stuart Connolly. All rights reserved.
-//
-// Permission is hereby granted, free of charge, to any person
-// obtaining a copy of this software and associated documentation
-// files (the "Software"), to deal in the Software without
-// restriction, including without limitation the rights to use,
-// copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the
-// Software is furnished to do so, subject to the following
-// conditions:
-//
-// The above copyright notice and this permission notice shall be
-// included in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
-// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
-// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-// OTHER DEALINGS IN THE SOFTWARE.
-
-#import "FLXPostgresConnectionParameters.h"
-#import "FLXPostgresKitPrivateAPI.h"
-#import "FLXPostgresConnection.h"
-
-@interface FLXPostgresConnectionParameters ()
-
-- (void)_loadParameters:(id)object;
-- (BOOL)_isBooleanParameterValue:(NSString *)value;
-- (BOOL)_booleanForParameterValue:(NSString *)value;
-
-@end
-
-@implementation FLXPostgresConnectionParameters
-
-@synthesize connection = _connection;
-
-#pragma mark -
-
-- (id)init
-{
- return [self initWithConnection:nil];
-}
-
-/**
- * Initialise a parameters instance with the supplied connection.
- *
- * @param connection The connection to use.
- *
- * @return The initialised instance.
- */
-- (id)initWithConnection:(FLXPostgresConnection *)connection
-{
- if ((self = [super init])) {
- _connection = connection;
-
- pthread_mutex_init(&_readLock, NULL);
- }
-
- return self;
-}
-
-#pragma mark -
-#pragma mark Public API
-
-/**
- * Loads the database parameters.
- *
- * @return A BOOL indicating the success of the load.
- */
-- (BOOL)loadParameters
-{
- pthread_mutex_lock(&_readLock);
-
- if (!_connection || ![_connection isConnected]) {
- pthread_mutex_unlock(&_readLock);
-
- return NO;
- }
-
- if (!_parameterNames) {
- _parameterNames = [[NSMutableArray alloc] init];
-
- [_parameterNames addObject:FLXPostgresParameterServerEncoding];
- [_parameterNames addObject:FLXPostgresParameterClientEncoding];
- [_parameterNames addObject:FLXPostgresParameterSuperUser];
- [_parameterNames addObject:FLXPostgresParameterTimeZone];
- [_parameterNames addObject:FLXPostgresParameterIntegerDateTimes];
- }
-
- pthread_mutex_unlock(&_readLock);
-
- [self performSelectorInBackground:@selector(_loadParameters:) withObject:_parameterNames];
-
- return YES;
-}
-
-/**
- * Gets the object for the supplied parameter.
- *
- * @param parameter The name of the parameter to lookup.
- *
- * @return The parameter value or nil if parameters haven't been loaded or it can't be found.
- */
-- (id)valueForParameter:(NSString *)parameter
-{
- pthread_mutex_lock(&_readLock);
-
- if (!_parameters || ![_parameters count]) {
- pthread_mutex_unlock(&_readLock);
-
- return nil;
- }
-
- id value = [_parameters objectForKey:parameter];
-
- pthread_mutex_unlock(&_readLock);
-
- return value;
-}
-
-#pragma mark -
-#pragma mark Private API
-
-/**
- * Loads the values of the supplied array of parameters by query the current connection.
- *
- * @param object The parameters to load.
- */
-- (void)_loadParameters:(id)object
-{
- NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
-
- pthread_mutex_lock(&_readLock);
-
- NSArray *parameters = (NSArray *)object;
-
- if (!_parameters) {
- _parameters = [[NSMutableDictionary alloc] initWithCapacity:[parameters count]];
- }
-
- for (NSString *parameter in parameters)
- {
- const char *value = PQparameterStatus([_connection postgresConnection], [parameter UTF8String]);
-
- if (!value) continue;
-
- NSString *stringValue = [NSString stringWithUTF8String:value];
-
- id paramObject = [self _isBooleanParameterValue:stringValue] ? (id)[NSNumber numberWithBool:[self _booleanForParameterValue:stringValue]] : stringValue;
-
- [_parameters setObject:paramObject forKey:parameter];
- }
-
- pthread_mutex_unlock(&_readLock);
-
- [pool release];
-}
-
-/**
- * Determines whether or not the supplied value is a boolean value.
- *
- * @param value The value to look at.
- *
- * @return A BOOL indicating if the value is a boolean type.
- */
-- (BOOL)_isBooleanParameterValue:(NSString *)value
-{
- value = [value uppercaseString];
-
- return
- [value isEqualToString:@"ON"] ||
- [value isEqualToString:@"YES"] ||
- [value isEqualToString:@"TRUE"] ||
- [value isEqualToString:@"OFF"] ||
- [value isEqualToString:@"NO"] ||
- [value isEqualToString:@"FALSE"];
-}
-
-/**
- * Determines the boolean value for the supplied boolean string representation.
- *
- * @param value The value to look at.
- *
- * @return A BOOL indicating the value of the string representation.
- */
-- (BOOL)_booleanForParameterValue:(NSString *)value
-{
- value = [value uppercaseString];
-
- return
- [value isEqualToString:@"ON"] ||
- [value isEqualToString:@"YES"] ||
- [value isEqualToString:@"TRUE"];
-}
-
-#pragma mark -
-
-- (void)dealloc
-{
- _connection = nil;
-
- pthread_mutex_destroy(&_readLock);
-
- if (_parameters) [_parameters release], _parameters = nil;
- if (_parameterNames) [_parameterNames release], _parameterNames = nil;
-
- [super dealloc];
-}
-
-@end