/*****************************************************************
 *   Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 ****************************************************************/

#import "CAYArcDeleteOperation.h"
#import "CAYArcCreateOperation.h"
#import "CAYUtil.h"

@implementation CAYArcDeleteOperation

-(id)initWithNodeId:(NSObject *)nid targetNodeId:(NSObject *)tnid arcId:(NSObject *)aid
{
    self = [super initWithNodeId:nid];
    if(self)
    {
        [self setTargetNodeId:tnid];
        [self setArcId:aid];
    }
    return self;
}

-(id)initWithCoder:(NSCoder*)coder
{
	[super initWithCoder:coder];
    [self setTargetNodeId:[coder decodeObjectForKey:@"targetNodeId"]];
    [self setArcId:[coder decodeObjectForKey:@"arcId"]];
	return self;
}

-(void)encodeWithCoder:(NSCoder*)coder
{
    [super encodeWithCoder:coder];
	[coder encodeObject:targetNodeId forKey:@"targetNodeId"];
	[coder encodeObject:arcId forKey:@"arcId"];
}

-(void)setTargetNodeId:(NSObject *)o
{
    [o retain];
    [targetNodeId release];
    targetNodeId = o;
}

-(NSObject *)targetNodeId
{
    return targetNodeId;
}

-(void)setArcId:(NSObject *)o
{
    [o retain];
    [arcId release];
    arcId = o;
}

-(NSObject *)arcId
{
    return arcId;
}

-(BOOL)isOpposite:(CAYNodeDiff *)diff
{
    if(![diff isKindOfClass:[CAYArcCreateOperation class]])
    {
        return NO;
    }
    
    if(![[diff nodeId] isEqualTo:[self nodeId]])
    {
        return NO;
    }
    
    CAYArcCreateOperation *other = (CAYArcCreateOperation *)diff;
    
    return ([[other arcId] isEqualTo:[self arcId]] && 
            [CAYUtil nilSafe:[other targetNodeId] isEqualTo:[self targetNodeId]]);
}

-(NSString *)description
{
    NSString *result;
    result = [[NSString alloc] initWithFormat:@"CAYArcDeleteOperation {nodeId = %@; arcId = %@; targetNodeId = %@ }", [self nodeId], [self arcId], [self targetNodeId]];
    [result autorelease];
    return result;
}

-(void)dealloc
{
	[self setTargetNodeId:nil];
	[self setArcId:nil];
	[super dealloc];
}

@end