Class: OpenC3::JsonAccessor
Instance Attribute Summary
Attributes inherited from Accessor
#packet
Class Method Summary
collapse
Instance Method Summary
collapse
Methods inherited from Accessor
#args, convert_to_type, #initialize, #read_item, #read_items, #write_item, #write_items
Class Method Details
.read_item(item, buffer) ⇒ Object
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# File 'lib/openc3/accessors/json_accessor.rb', line 25
def self.read_item(item, buffer)
return nil if item.data_type == :DERIVED
return JsonPath.on(buffer, item.key).first
end
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.read_items(items, buffer) ⇒ Object
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# File 'lib/openc3/accessors/json_accessor.rb', line 51
def self.read_items(items, buffer)
if String === buffer
decoded = JSON.parse(buffer, :allow_nan => true)
else
decoded = buffer
end
super(items, decoded)
end
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.write_item(item, value, buffer) ⇒ Object
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# File 'lib/openc3/accessors/json_accessor.rb', line 30
def self.write_item(item, value, buffer)
return nil if item.data_type == :DERIVED
if String === buffer
decoded = JSON.parse(buffer, :allow_nan => true)
else
decoded = buffer
end
write_item_internal(item, value, decoded)
if String === buffer
buffer.replace(JSON.generate(decoded, :allow_nan => true))
end
return value
end
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.write_item_internal(item, value, decoded) ⇒ Object
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# File 'lib/openc3/accessors/json_accessor.rb', line 84
def self.write_item_internal(item, value, decoded)
return nil if item.data_type == :DERIVED
parent_node = nil
parent_key = nil
node = decoded
json_path = JsonPath.new(item.key)
json_path.path.each do |token|
case token
when '$'
next
when /\[.*\]/
if token.index("'") key = token[2..-3]
if not (Hash === node)
node = {}
parent_node[parent_key] = node
end
parent_node = node
parent_key = key
node = node[key]
else key = token[1..-2].to_i
if not (Array === node)
node = []
parent_node[parent_key] = node
end
parent_node = node
parent_key = key
node = node[key]
end
else
raise "Unsupported key/token: #{item.key} - #{token}"
end
end
if parent_node
parent_node[parent_key] = value
else
decoded.replace(value)
end
return decoded
end
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.write_items(items, values, buffer) ⇒ Object
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# File 'lib/openc3/accessors/json_accessor.rb', line 61
def self.write_items(items, values, buffer)
buffer.replace("{}") if buffer.length == 0 or buffer[0] == "\x00"
if String === buffer
decoded = JSON.parse(buffer, :allow_nan => true)
else
decoded = buffer
end
items.each_with_index do |item, index|
write_item_internal(item, values[index], decoded)
end
if String === buffer
buffer.replace(JSON.generate(decoded, :allow_nan => true))
end
return values
end
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Instance Method Details
#enforce_derived_write_conversion(item) ⇒ Object
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# File 'lib/openc3/accessors/json_accessor.rb', line 146
def enforce_derived_write_conversion(item)
return true
end
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#enforce_encoding ⇒ Object
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# File 'lib/openc3/accessors/json_accessor.rb', line 134
def enforce_encoding
return nil
end
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#enforce_length ⇒ Object
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# File 'lib/openc3/accessors/json_accessor.rb', line 138
def enforce_length
return false
end
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#enforce_short_buffer_allowed ⇒ Object
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# File 'lib/openc3/accessors/json_accessor.rb', line 142
def enforce_short_buffer_allowed
return true
end
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