text: /*
   * SMJValueNode.h
   *
   * Copyright 2017 Avérous Julien-Pierre
   *
   * Licensed 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.
   */
  
  
  /* Adapted from https://github.com/json-path/JsonPath/blob/master/json-path/src/main/java/com/jayway/jsonpath/internal/filter/ValueNode.java */
  
  
  #import <Foundation/Foundation.h>
  
  #import "SMJPredicate.h"
  
  #import "SMJPath.h"
  
  
  NS_ASSUME_NONNULL_BEGIN
  
  
  /*
  ** Forward
  */
  #pragma mark - Forward
  
  @class SMJPathNode;
  @class SMJNullNode;
  @class SMJJsonNode;
  @class SMJPatternNode;
  @class SMJStringNode;
  @class SMJNumberNode;
  @class SMJBooleanNode;
  
  
  /*
  ** Types
  */
  #pragma mark - Types
  
  typedef enum SMJComparisonResult {
  	SMJComparisonSame,
  	SMJComparisonDiffer,
  	SMJComparisonDifferGreaterThan,
  	SMJComparisonDifferLessThan
  } SMJComparisonResult;
  
  
  /*
  ** SMJValueNode
  */
  #pragma mark - SMJValueNode
  
  @interface SMJValueNode : NSObject
  
  + (SMJBooleanNode *)valueNodeTRUE;
  + (SMJBooleanNode *)valueNodeFALSE;
  
  + (SMJNullNode *)nullNode;
  + (SMJJsonNode *)jsonNodeWithString:(NSString *)string;
  + (SMJPatternNode *)patternNodeWithString:(NSString *)string;
  + (SMJStringNode *)stringNodeWithString:(NSString *)string escape:(BOOL)escape;
  + (SMJNumberNode *)numberNodeWithString:(NSString *)string;
  + (SMJBooleanNode *)booleanNodeWithString:(NSString *)string;
  + (SMJPathNode *)pathNodeWithPath:(id <SMJPath>)path;
  + (nullable SMJPathNode *)pathNodeWithPathString:(NSString *)pathString existsCheck:(BOOL)existsCheck shouldExists:(BOOL)shouldExists error:(NSError **)error;
  
  - (NSString *)stringValue;
  - (nullable NSString *)literalValue;
  
  - (NSString *)typeName;
  
  - (BOOL)isEqual:(SMJValueNode *)node;
  - (SMJComparisonResult)compare:(SMJValueNode *)node;
  
  - (nullable id)underlayingObjectWithError:(NSError **)error;
  
  @end
  
  
  
  /*
  ** Subnodes
  */
  #pragma mark - Subnodes
  
  @interface SMJPathNode : SMJValueNode
  
  - (instancetype)init NS_UNAVAILABLE;
  
  - (instancetype)copyWithExistsCheckAndShouldExists:(BOOL)existsCheck;
  
  @property (readonly) BOOL shouldExists;
  @property (readonly, getter=isExistsCheck) BOOL existsCheck;
  
  - (nullable SMJValueNode *)evaluate:(id <SMJPredicateContext>)context error:(NSError **)error;
  
  - (id <SMJPath>)underlayingObjectWithError:(NSError **)error;
  
  @end
  
  
  @interface SMJNullNode : SMJValueNode
  
  - (instancetype)init NS_UNAVAILABLE;
  
  - (NSNull *)underlayingObjectWithError:(NSError **)error;
  
  @end
  
  
  @interface SMJJsonNode : SMJValueNode
  
  - (instancetype)init NS_UNAVAILABLE;
  
  - (nullable id)underlayingObjectWithError:(NSError **)error;
  
  @end
  
  
  @interface SMJPatternNode : SMJValueNode
  
  - (instancetype)init NS_UNAVAILABLE;
  
  - (NSRegularExpression *)underlayingObjectWithError:(NSError **)error;
  
  @end
  
  
  @interface SMJStringNode : SMJValueNode
  
  - (instancetype)init NS_UNAVAILABLE;
  
  - (NSString *)underlayingObjectWithError:(NSError **)error;
  
  @end
  
  
  @interface SMJNumberNode : SMJValueNode
  
  - (instancetype)init NS_UNAVAILABLE;
  
  - (NSNumber *)underlayingObjectWithError:(NSError **)error;
  
  @end
  
  
  @interface SMJBooleanNode : SMJValueNode
  
  - (instancetype)init NS_UNAVAILABLE;
  
  - (NSNumber *)underlayingObjectWithError:(NSError **)error;
  
  @end
  
  
  NS_ASSUME_NONNULL_END
  
  
  
  