1// 2// RewriteRuleNodeStream.m 3// ANTLR 4// 5// Created by Kay Röpke on 7/16/07. 6// Copyright 2007 classDump. All rights reserved. 7// 8 9#import "RewriteRuleNodeStream.h" 10#import "RuntimeException.h" 11 12@implementation RewriteRuleNodeStream 13 14+ (RewriteRuleNodeStream*) newRewriteRuleNodeStream:(id<TreeAdaptor>)aTreeAdaptor description:(NSString *)anElementDescription; 15{ 16 return [[RewriteRuleNodeStream alloc] initWithTreeAdaptor:aTreeAdaptor description:anElementDescription]; 17} 18 19+ (RewriteRuleNodeStream*) newRewriteRuleNodeStream:(id<TreeAdaptor>)aTreeAdaptor description:(NSString *)anElementDescription element:(id)anElement; 20{ 21 return [[RewriteRuleNodeStream alloc] initWithTreeAdaptor:aTreeAdaptor description:anElementDescription element:anElement]; 22} 23 24+ (RewriteRuleNodeStream*) newRewriteRuleNode:(id<TreeAdaptor>)aTreeAdaptor description:(NSString *)anElementDescription elements:(NSArray *)theElements; 25{ 26 return [[RewriteRuleNodeStream alloc] initWithTreeAdaptor:aTreeAdaptor description:anElementDescription elements:theElements]; 27} 28 29- (id) initWithTreeAdaptor:(id<TreeAdaptor>)aTreeAdaptor description:(NSString *)anElementDescription 30{ 31 if ((self = [super initWithTreeAdaptor:aTreeAdaptor description:anElementDescription]) != nil) { 32 dirty = NO; 33 isSingleElement = YES; 34 } 35 return self; 36} 37 38- (id) initWithTreeAdaptor:(id<TreeAdaptor>)aTreeAdaptor description:(NSString *)anElementDescription element:(id)anElement 39{ 40 if ((self = [super initWithTreeAdaptor:aTreeAdaptor description:anElementDescription element:anElement]) != nil) { 41 dirty = NO; 42 } 43 return self; 44} 45 46- (id) initWithTreeAdaptor:(id<TreeAdaptor>)aTreeAdaptor description:(NSString *)anElementDescription elements:(NSArray *)theElements 47{ 48 if ((self = [super init]) != nil) { 49 dirty = NO; 50 } 51 return self; 52} 53 54 55- (id) nextNode 56{ 57 if (dirty || (cursor >= [self size] && [self size] == 1)) 58 return [treeAdaptor dupNode:[self _next]]; 59 else 60 return [self _next]; 61} 62 63- (id<BaseTree>) toTree:(id<BaseTree>)element 64{ 65 return [treeAdaptor dupNode:element]; 66} 67 68- (id) dup:(id)element 69{ 70 return [treeAdaptor dupTree:element]; 71 @throw [RuntimeException newException:@"UnsupportedOperationException" reason:@"dup can't be called for a node stream."]; 72} 73 74@end 75