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      1 //
      2 //  ANTLRTreeException.m
      3 //  ANTLR
      4 //
      5 //  Created by Kay Rpke 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