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99 lines
2.6 KiB
Plaintext
99 lines
2.6 KiB
Plaintext
/*
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* _CPVariableExpression.j
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*
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* Portions based on NSExpression_variable.m in Cocotron (http://www.cocotron.org/)
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* Copyright (c) 2006-2007 Christopher J. W. Lloyd
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*
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* Created by cacaodev.
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* Copyright 2010.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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@import "CPDictionary.j"
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@import "CPException.j"
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@import "CPString.j"
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@import "_CPExpression.j"
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@implementation _CPVariableExpression : CPExpression
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{
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CPString _variable @accessors(getter=variable);
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}
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- (id)initWithVariable:(CPString)variable
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{
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self = [super initWithExpressionType:CPVariableExpressionType];
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if (self)
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{
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_variable = [variable copy];
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}
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return self;
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}
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- (BOOL)isEqual:(id)object
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{
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if (self === object)
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return YES;
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if (object == nil || object.isa !== self.isa || ![[object variable] isEqual:_variable])
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return NO;
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return YES;
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}
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- (id)expressionValueWithObject:object context:(CPDictionary)context
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{
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var expression = [self _expressionWithSubstitutionVariables:context];
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return [expression expressionValueWithObject:object context:context];
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}
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- (CPString)description
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{
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return [CPString stringWithFormat:@"$%s", _variable];
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}
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- (CPExpression)_expressionWithSubstitutionVariables:(CPDictionary)variables
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{
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var value = [variables objectForKey:_variable];
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if (value == nil)
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[CPException raise:CPInvalidArgumentException reason:@"Can't get value for '" + _variable + "' in bindings" + variables];
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if ([value isKindOfClass:[CPExpression class]])
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return value;
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return [CPExpression expressionForConstantValue:value];
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}
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@end
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var CPVariableKey = @"CPVariable";
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@implementation _CPVariableExpression (CPCoding)
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- (id)initWithCoder:(CPCoder)coder
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{
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var variable = [coder decodeObjectForKey:CPVariableKey];
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return [self initWithVariable:variable];
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}
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- (void)encodeWithCoder:(CPCoder)coder
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{
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[coder encodeObject:_variable forKey:CPVariableKey];
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}
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@end
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