1//
2//  RewriteRuleTokenStream.m
3//  ANTLR
4//
5//  Created by Kay Röpke on 7/16/07.
6// [The "BSD licence"]
7// Copyright (c) 2006-2007 Kay Roepke 2010 Alan Condit
8// All rights reserved.
9//
10// Redistribution and use in source and binary forms, with or without
11// modification, are permitted provided that the following conditions
12// are met:
13// 1. Redistributions of source code must retain the above copyright
14//    notice, this list of conditions and the following disclaimer.
15// 2. Redistributions in binary form must reproduce the above copyright
16//    notice, this list of conditions and the following disclaimer in the
17//    documentation and/or other materials provided with the distribution.
18// 3. The name of the author may not be used to endorse or promote products
19//    derived from this software without specific prior written permission.
20//
21// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31
32#import "RewriteRuleTokenStream.h"
33#import "RuntimeException.h"
34#import "HashMap.h"
35#import "MapElement.h"
36
37@implementation RewriteRuleTokenStream
38
39+ (id) newRewriteRuleTokenStream:(id<TreeAdaptor>)anAdaptor
40                          description:(NSString *)elementDescription
41{
42    return [[RewriteRuleTokenStream alloc] initWithTreeAdaptor:anAdaptor
43                                                        description:elementDescription];
44}
45
46/** Create a stream with one element */
47+ (id) newRewriteRuleTokenStream:(id<TreeAdaptor>)adaptor
48                          description:(NSString *)elementDescription
49                              element:(id) oneElement
50{
51    return [[RewriteRuleTokenStream alloc] initWithTreeAdaptor:adaptor
52                                                        description:elementDescription
53                                                            element:oneElement];
54}
55
56/** Create a stream, but feed off an existing list */
57+ (id) newRewriteRuleTokenStream:(id<TreeAdaptor>)adaptor
58                          description:(NSString *)elementDescription
59                             elements:(AMutableArray *)elements
60{
61    return [[RewriteRuleTokenStream alloc] initWithTreeAdaptor:adaptor
62                                                        description:elementDescription
63                                                           elements:elements];
64}
65
66- (id) init
67{
68    if ((self = [super init]) != nil ) {
69    }
70    return self;
71}
72
73- (id) initWithTreeAdaptor:(id<TreeAdaptor>)anAdaptor
74               description:(NSString *)aDescription
75{
76    if ((self = [super initWithTreeAdaptor:anAdaptor
77                               description:aDescription]) != nil ) {
78    }
79    return self;
80}
81
82- (id) initWithTreeAdaptor:(id<TreeAdaptor>)anAdaptor
83               description:(NSString *)aDescription
84                   element:(id)anElement
85{
86    if ((self = [super initWithTreeAdaptor:anAdaptor
87                               description:aDescription
88                                   element:anElement]) != nil ) {
89    }
90    return self;
91}
92
93- (id) initWithTreeAdaptor:(id<TreeAdaptor>)anAdaptor
94               description:(NSString *)aDescription
95                  elements:(AMutableArray *)elementList
96{
97    if ((self = [super initWithTreeAdaptor:anAdaptor
98                               description:aDescription
99                                  elements:elementList]) != nil ) {
100    }
101    return self;
102}
103
104- (id<BaseTree>) nextNode
105{
106    id<Token> t = (id<Token>)[self _next];
107    return [treeAdaptor create:t];
108}
109
110- (id) nextToken
111{
112    return [self _next];
113}
114
115/** Don't convert to a tree unless they explicitly call nextTree.
116 *  This way we can do hetero tree nodes in rewrite.
117 */
118- (id<BaseTree>) toTree:(id<Token>)element
119{
120    return (id<BaseTree>)element;
121}
122
123- (id) copyElement:(id)element
124{
125    @throw [RuntimeException newException:@"copy can't be called for a token stream."];
126}
127
128@end
129