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cappuccino/Foundation/CPPredicate/_CPKeyPathExpression.j
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/*
* _CPKeyPathExpression.j
*
* Portions based on NSExpression_keypath.m in Cocotron (http://www.cocotron.org/)
* Copyright (c) 2006-2007 Christopher J. W. Lloyd
*
* Created by cacaodev.
* Copyright 2010.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@import "CPKeyValueCoding.j"
@import "CPString.j"
@import "_CPExpression.j"
@import "_CPFunctionExpression.j"
@import "_CPConstantValueExpression.j"
@implementation _CPKeyPathExpression : _CPFunctionExpression
{
}
- (id)initWithKeyPath:(CPString)keyPath
{
return [self initWithOperand:[CPExpression expressionForEvaluatedObject] andKeyPath:keyPath];
}
- (id)initWithOperand:(CPExpression)operand andKeyPath:(CPString)keyPath
{
var arg = [CPExpression expressionForConstantValue:keyPath];
// Cocoa: if it's a direct path selector use valueForKey:
self = [super initWithTarget:operand selector:@selector(valueForKeyPath:) arguments:[arg] type:CPKeyPathExpressionType];
return self;
}
- (BOOL)isEqual:(id)object
{
if (object === self)
return YES;
if (object == nil || object.isa !== self.isa || ![[object keyPath] isEqualToString:[self keyPath]])
return NO;
return YES;
}
- (CPExpression)pathExpression
{
return [[self arguments] objectAtIndex:0];
}
- (CPString)keyPath
{
return [[self pathExpression] keyPath];
}
- (CPString)description
{
var result = "";
if ([_operand expressionType] != CPEvaluatedObjectExpressionType)
result += [_operand description] + ".";
result += [self keyPath];
return result;
}
@end
@implementation _CPConstantValueExpression (KeyPath)
- (CPString)keyPath
{
return [self constantValue];
}
@end