Class: JSONSelect
- Inherits:
-
Object
- Object
- JSONSelect
- Defined in:
- lib/json_select.rb,
lib/json_select/version.rb,
lib/json_select/selector.rb
Defined Under Namespace
Modules: Ast, Selector Classes: SelectorParser
Constant Summary collapse
- ParseError =
Class.new(RuntimeError)
- VERSION =
"0.1.2"
- @@parser_cache =
{}
Instance Attribute Summary collapse
-
#ast ⇒ Object
readonly
Returns the value of attribute ast.
Class Method Summary collapse
Instance Method Summary collapse
-
#initialize(src, use_parser_cache = true) ⇒ JSONSelect
constructor
A new instance of JSONSelect.
-
#match(object) ⇒ Object
(also: #=~)
Returns the first matching child in ‘object`.
-
#matches(object) ⇒ Object
Returns all matching children in ‘object`.
-
#test(object) ⇒ Object
(also: #===)
Returns true if ‘object` has any matching children.
Constructor Details
#initialize(src, use_parser_cache = true) ⇒ JSONSelect
Returns a new instance of JSONSelect.
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# File 'lib/json_select/selector.rb', line 11 def initialize(src, use_parser_cache=true) case src when String ast = nil if use_parser_cache ast = @@parser_cache[src] end if ast @ast = ast else parser = JSONSelect::SelectorParser.new tree = parser.parse(src) unless tree raise JSONSelect::ParseError, parser.failure_reason end @ast = tree.to_ast if use_parser_cache @@parser_cache[src] = ast end end when Array @ast = src else raise ArgumentError, "Expected a string for ast" end end |
Instance Attribute Details
#ast ⇒ Object (readonly)
Returns the value of attribute ast.
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# File 'lib/json_select/selector.rb', line 3 def ast @ast end |
Class Method Details
.reset_cache! ⇒ Object
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# File 'lib/json_select/selector.rb', line 7 def self.reset_cache! @@parser_cache.clear end |
Instance Method Details
#match(object) ⇒ Object Also known as: =~
Returns the first matching child in ‘object`
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# File 'lib/json_select/selector.rb', line 48 def match(object) _each(@ast, object, nil, nil, nil, 0) do |object| return object end return nil end |
#matches(object) ⇒ Object
Returns all matching children in ‘object`
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# File 'lib/json_select/selector.rb', line 59 def matches(object) matches = [] _each(@ast, object, nil, nil, nil, 0) do |object| matches << object end matches end |
#test(object) ⇒ Object Also known as: ===
Returns true if ‘object` has any matching children.
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# File 'lib/json_select/selector.rb', line 70 def test(object) _each(@ast, object, nil, nil, nil, 0) do |object| return true end return false end |