/*****************************************************************
 *   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 "CAYNodePropertyChangeOperation.h"
#import "CAYNodeDiff.h"
#import "CAYUtil.h"

@implementation CAYNodePropertyChangeOperation

-(id)initWithNodeId:(NSObject *)nid property:(NSString *)prop oldValue:(NSObject *)oldVal newValue:(NSObject *)newVal
{
    [super initWithNodeId:nid];
    [self setProperty:prop];
    [self setOldValue:oldVal];
    [self setNewValue:newVal];
    return self;
}

-(id)initWithNodeId:(NSObject *)nid property:(NSString *)prop oldValue:(NSObject *)oldVal newValue:(NSObject *)newVal diffId:(NSInteger)did
{
    [self initWithNodeId:nid property:prop oldValue:oldVal newValue:newVal];
    diffId = did;
    return self;
}

-(id)initWithCoder:(NSCoder*)coder
{
	[super initWithCoder:coder];
    [self setProperty:[coder decodeObjectForKey:@"property"]];
    [self setOldValue:[coder decodeObjectForKey:@"oldValue"]];
    [self setNewValue:[coder decodeObjectForKey:@"newValue"]];
	return self;
}

-(void)encodeWithCoder:(NSCoder*)coder
{
    [super encodeWithCoder:coder];
	[coder encodeObject:property forKey:@"property"];
	[coder encodeObject:oldValue forKey:@"oldValue"];
	[coder encodeObject:newValue forKey:@"newValue"];
}

-(void)setProperty:(NSString *)p
{
    [p retain];
    [property release];
    property = p;
}

-(NSString *)property
{
    return property;
}

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

-(NSObject *)oldValue
{
    return oldValue;
}

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

-(NSObject *)newValue
{
    return newValue;
}

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

-(NSString *)description
{
    NSString *result;
    result = [[NSString alloc] initWithFormat:@"CAYNodePropertyChangeOperation {nodeId = %@; property = %@; oldValue = %@; newValue = %@}", [self nodeId], [self property], [self oldValue], [self newValue]];
    [result autorelease];
    return result;
}

-(void)dealloc
{
	[self setProperty:nil];
	[self setOldValue:nil];
	[self setNewValue:nil];
	[super dealloc];
}


@end