1// 2// ANTLRTreeException.m 3// ANTLR 4// 5// Created by Kay Röpke on 24.10.2006. 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 33#import "ANTLRTreeException.h" 34 35 36@implementation ANTLRTreeException 37 38+ (id) newException:(id<ANTLRBaseTree>)theOldRoot newRoot:(id<ANTLRBaseTree>)theNewRoot stream:(id<ANTLRIntStream>)aStream; 39{ 40 return [[ANTLRTreeException alloc] initWithOldRoot:theOldRoot newRoot:theNewRoot stream:aStream]; 41} 42 43- (id) initWithOldRoot:(id<ANTLRBaseTree>)theOldRoot newRoot:(id<ANTLRBaseTree>)theNewRoot stream:(id<ANTLRIntStream>)aStream; 44{ 45 if ((self = [super initWithStream:aStream reason:@"The new root has more than one child. Cannot make it the root node."]) != nil ) { 46 [self setOldRoot:theOldRoot]; 47 [self setNewRoot:theNewRoot]; 48 } 49 return self; 50} 51 52- (void) dealloc 53{ 54#ifdef DEBUG_DEALLOC 55 NSLog( @"called dealloc in ANTLRTreeException" ); 56#endif 57 [self setOldRoot:nil]; 58 [self setNewRoot:nil]; 59 [super dealloc]; 60} 61 62- (void) setNewRoot:(id<ANTLRBaseTree>)aTree 63{ 64 if (newRoot != aTree) { 65 [aTree retain]; 66 if ( newRoot ) [newRoot release]; 67 newRoot = aTree; 68 } 69} 70 71- (void) setOldRoot:(id<ANTLRBaseTree>)aTree 72{ 73 if (oldRoot != aTree) { 74 [aTree retain]; 75 if ( oldRoot ) [oldRoot release]; 76 oldRoot = aTree; 77 } 78} 79 80- (NSString *) description 81{ 82 return [NSMutableString stringWithFormat:@"%@ old root: <%@> new root: <%@>", [super description], [oldRoot treeDescription], [newRoot treeDescription]]; 83} 84 85@end 86