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1 // [The "BSD licence"]
2 // Copyright (c) 2006-2007 Kay Roepke 2010 Alan Condit
3 // All rights reserved.
4 //
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions
7 // are met:
8 // 1. Redistributions of source code must retain the above copyright
9 //    notice, this list of conditions and the following disclaimer.
10 // 2. Redistributions in binary form must reproduce the above copyright
11 //    notice, this list of conditions and the following disclaimer in the
12 //    documentation and/or other materials provided with the distribution.
13 // 3. The name of the author may not be used to endorse or promote products
14 //    derived from this software without specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 // IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 // NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 
27 #import <Foundation/Foundation.h>
28 #import "TreeAdaptor.h"
29 
30 // TODO: this should be separated into stream and enumerator classes
31 @interface RewriteRuleElementStream : NSObject {
32     NSInteger cursor;
33     BOOL dirty;        ///< indicates whether the stream should return copies of its elements, set to true after a call to -reset
34     BOOL isSingleElement;
35     id singleElement;
36     __strong AMutableArray *elements;
37 
38     __strong NSString *elementDescription;
39     __strong id<TreeAdaptor> treeAdaptor;
40 }
41 
42 @property (assign) NSInteger cursor;
43 @property (assign) BOOL dirty;
44 @property (assign) BOOL isSingleElement;
45 @property (assign) id singleElement;
46 @property (assign) AMutableArray *elements;
47 @property (assign) NSString *elementDescription;
48 @property (retain) id<TreeAdaptor> treeAdaptor;
49 
50 + (RewriteRuleElementStream*) newRewriteRuleElementStream:(id<TreeAdaptor>)aTreeAdaptor
51                                                         description:(NSString *)anElementDescription;
52 + (RewriteRuleElementStream*) newRewriteRuleElementStream:(id<TreeAdaptor>)aTreeAdaptor
53                                                         description:(NSString *)anElementDescription
54                                                             element:(id)anElement;
55 + (RewriteRuleElementStream*) newRewriteRuleElementStream:(id<TreeAdaptor>)aTreeAdaptor
56                                                         description:(NSString *)anElementDescription
57                                                            elements:(NSArray *)theElements;
58 
59 - (id) initWithTreeAdaptor:(id<TreeAdaptor>)aTreeAdaptor description:(NSString *)anElementDescription;
60 - (id) initWithTreeAdaptor:(id<TreeAdaptor>)aTreeAdaptor description:(NSString *)anElementDescription element:(id)anElement;
61 - (id) initWithTreeAdaptor:(id<TreeAdaptor>)aTreeAdaptor description:(NSString *)anElementDescription elements:(NSArray *)theElements;
62 
63 - (void)reset;
64 
65 - (id<TreeAdaptor>) getTreeAdaptor;
66 - (void) setTreeAdaptor:(id<TreeAdaptor>)aTreeAdaptor;
67 
68 - (void) addElement:(id)anElement;
69 - (NSInteger) size;
70 
71 - (BOOL) hasNext;
72 - (id<BaseTree>) nextTree;
73 - (id<BaseTree>) _next;       // internal: TODO: redesign if necessary. maybe delegate
74 
75 - (id) copyElement:(id)element;
76 - (id) toTree:(id)element;
77 
78 - (NSString *) getDescription;
79 - (void) setDescription:(NSString *)description;
80 
81 @end
82 
83