MYNetwork: BLIP/BLIPDispatcher.m@02224e981209

     1 //

     2 //  BLIPDispatcher.m

     3 //  MYNetwork

     4 //

     5 //  Created by Jens Alfke on 5/15/08.

     6 //  Copyright 2008 Jens Alfke. All rights reserved.

     7 //

     9 #import "BLIPDispatcher.h"

    10 #import "Target.h"

    11 #import "BLIPRequest.h"

    12 #import "BLIPProperties.h"

    13 #import "Logging.h"

    14 #import "Test.h"

    17 @implementation BLIPDispatcher

    20 - (id) init

    21 {

    22     self = [super init];

    23     if (self != nil) {

    24         _targets = [[NSMutableArray alloc] init];

    25         _predicates = [[NSMutableArray alloc] init];

    26     }

    27     return self;

    28 }

    30 - (void) dealloc

    31 {

    32     [_targets release];

    33     [_predicates release];

    34     [_parent release];

    35     [super dealloc];

    36 }

    39 @synthesize parent=_parent;

    42 #if ! TARGET_OS_IPHONE

    43 - (void) addTarget: (MYTarget*)target forPredicate: (NSPredicate*)predicate

    44 {

    45     [_targets addObject: target];

    46     [_predicates addObject: predicate];

    47 }

    48 #endif

    51 - (void) removeTarget: (MYTarget*)target

    52 {

    53     NSUInteger i = [_targets indexOfObject: target];

    54     if( i != NSNotFound ) {

    55         [_targets removeObjectAtIndex: i];

    56         [_predicates removeObjectAtIndex: i];

    57     }

    58 }

    61 - (void) addTarget: (MYTarget*)target forValueOfProperty: (NSString*)value forKey: (NSString*)key

    62 {

    63 #if TARGET_OS_IPHONE

    64     Assert(target);

    65     [_predicates addObject: $array(key,value)];

    66     [_targets addObject: target];

    67 #else

    68     [self addTarget: target

    69        forPredicate: [NSComparisonPredicate predicateWithLeftExpression: [NSExpression expressionForKeyPath: key]

    70                                                         rightExpression: [NSExpression expressionForConstantValue: value]

    71                                                                modifier: NSDirectPredicateModifier

    72                                                                    type: NSEqualToPredicateOperatorType

    73                                                                 options: 0]];

    74 #endif

    75 }

    78 static BOOL testPredicate( id predicate, NSDictionary *properties ) {

    79 #if TARGET_OS_IPHONE

    80     NSString *key = [predicate objectAtIndex: 0];

    81     NSString *value = [predicate objectAtIndex: 1];

    82     return $equal( [properties objectForKey: key], value );

    83 #else

    84     return [(NSPredicate*)predicate evaluateWithObject: properties];

    85 #endif

    86 }

    89 - (BOOL) dispatchMessage: (BLIPMessage*)message

    90 {

    91     NSDictionary *properties = message.properties.allProperties;

    92     NSUInteger n = _predicates.count;

    93     for( NSUInteger i=0; i<n; i++ ) {

    94         id p = [_predicates objectAtIndex: i];

    95         if( testPredicate(p, properties) ) {

    96             MYTarget *target = [_targets objectAtIndex: i];

    97             LogTo(BLIP,@"Dispatcher matched %@ -- calling %@",p,target);

    98             [target invokeWithSender: message];

    99             return YES;

   100         }

   101     }

   102     return [_parent dispatchMessage: message];

   103 }

   106 - (MYTarget*) asTarget;

   107 {

   108     return $target(self,dispatchMessage:);

   109 }

   112 @end

   115 /*

   116  Copyright (c) 2008, Jens Alfke <jens@mooseyard.com>. All rights reserved.

   118  Redistribution and use in source and binary forms, with or without modification, are permitted

   119  provided that the following conditions are met:

   121  * Redistributions of source code must retain the above copyright notice, this list of conditions

   122  and the following disclaimer.

   123  * Redistributions in binary form must reproduce the above copyright notice, this list of conditions

   124  and the following disclaimer in the documentation and/or other materials provided with the

   125  distribution.

   127  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR

   128  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND

   129  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-

   130  BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

   131  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

   132   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

   133  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF

   134  THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

   135  */

author	Jens Alfke <jens@mooseyard.com>
	Sun Jul 13 10:52:48 2008 -0700 (2008-07-13)
changeset 20	02224e981209
parent 2	9fdd8dba529c
permissions	-rw-r--r--