e2ccdfd812
Update to Rails 2.3.2 (the stable Rails 2.3 release). Add audio/speex support Update CHANGELOG Bump version number
109 lines
3 KiB
Ruby
109 lines
3 KiB
Ruby
# = XmlMini ReXML implementation
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module ActiveSupport
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module XmlMini_REXML #:nodoc:
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extend self
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CONTENT_KEY = '__content__'.freeze
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# Parse an XML Document string into a simple hash
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#
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# Same as XmlSimple::xml_in but doesn't shoot itself in the foot,
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# and uses the defaults from ActiveSupport
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#
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# string::
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# XML Document string to parse
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def parse(string)
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require 'rexml/document' unless defined?(REXML::Document)
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doc = REXML::Document.new(string)
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merge_element!({}, doc.root)
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end
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private
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# Convert an XML element and merge into the hash
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#
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# hash::
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# Hash to merge the converted element into.
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# element::
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# XML element to merge into hash
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def merge_element!(hash, element)
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merge!(hash, element.name, collapse(element))
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end
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# Actually converts an XML document element into a data structure.
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#
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# element::
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# The document element to be collapsed.
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def collapse(element)
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hash = get_attributes(element)
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if element.has_elements?
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element.each_element {|child| merge_element!(hash, child) }
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merge_texts!(hash, element) unless empty_content?(element)
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hash
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else
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merge_texts!(hash, element)
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end
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end
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# Merge all the texts of an element into the hash
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#
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# hash::
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# Hash to add the converted emement to.
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# element::
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# XML element whose texts are to me merged into the hash
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def merge_texts!(hash, element)
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unless element.has_text?
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hash
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else
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# must use value to prevent double-escaping
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merge!(hash, CONTENT_KEY, element.texts.sum(&:value))
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end
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end
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# Adds a new key/value pair to an existing Hash. If the key to be added
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# already exists and the existing value associated with key is not
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# an Array, it will be wrapped in an Array. Then the new value is
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# appended to that Array.
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#
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# hash::
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# Hash to add key/value pair to.
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# key::
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# Key to be added.
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# value::
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# Value to be associated with key.
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def merge!(hash, key, value)
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if hash.has_key?(key)
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if hash[key].instance_of?(Array)
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hash[key] << value
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else
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hash[key] = [hash[key], value]
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end
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elsif value.instance_of?(Array)
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hash[key] = [value]
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else
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hash[key] = value
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end
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hash
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end
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# Converts the attributes array of an XML element into a hash.
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# Returns an empty Hash if node has no attributes.
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#
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# element::
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# XML element to extract attributes from.
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def get_attributes(element)
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attributes = {}
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element.attributes.each { |n,v| attributes[n] = v }
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attributes
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end
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# Determines if a document element has text content
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#
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# element::
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# XML element to be checked.
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def empty_content?(element)
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element.texts.join.blank?
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end
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end
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end
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