Module: XMLHash

Defined in:
lib/lyrics/utils/xmlhash.rb

Class Method Summary collapse

Class Method Details

.read(file, hash, only_hash_keys = true) ⇒ Object 



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# File 'lib/lyrics/utils/xmlhash.rb', line 62

def XMLHash.read( file, hash, only_hash_keys=true )

	begin
		read_file = nil
		read_file = file.is_a?( File ) ? file : File.new( file, "r" )
		elements = REXML::Document.new( read_file ).root.elements
		return false if elements == nil
	rescue Exception => e
		return false
	ensure
		read_file.close() if read_file && read_file != file
	end

	requested_keys = hash.keys

	keys = hash.keys
	if ! only_hash_keys
		elements.each() do |element|
			key = element.name
			keys << key if ! keys.include?( key )
		end
	end

	read_keys = []
	keys.each() do |key|
		if elements[key]
			value = elements[key].text.to_s()
			type = elements[key].attribute( "type" ).to_s()
			if type == "array"
				hash[key] = value.split( "\n" )
			elsif ( type == "fixnum" )
				hash[key] = value.to_i()
			elsif ( type == "float" )
				hash[key] = value.to_f()
			elsif ( type == "trueclass" )
				hash[key] = true
			elsif ( type == "falseclass" )
				hash[key] = false
			else
				hash[key] = value
			end
			read_keys << key
		end
	end

	return (requested_keys - read_keys).empty?

end

.write(file, hash) ⇒ Object 



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# File 'lib/lyrics/utils/xmlhash.rb', line 23

def XMLHash.write( file, hash )

	begin
		read_file = nil
		read_file = file.is_a?( File ) ? file : File.new( file, "r" )
		root = REXML::Document.new( read_file ).root
	rescue Exception
		root = REXML::Document.new( "<?xml version='1.0' encoding='UTF-8' ?>" ).add_element( "settings" )
	ensure
		read_file.close() if read_file
	end

	begin
		write_file = nil
		if ( file.is_a?( File ) )
			file.reopen( file.path, "w+" )
			write_file = file
		else
			write_file = File.new( file, "w+" )
		end
		hash.each do |key, value|
			element = root.elements[key]
			element = root.add_element( key ) if ! element
			element.text = value.is_a?( Array ) ? value.join( "\n" ) : value.to_s()
			element.add_attribute( "type", value.class.name.downcase )
		end
		root.parent.write( write_file )
		write_file.flush()
		return true
	rescue Exception => e
		puts e
		puts e.backtrace
		return false
	ensure
		write_file.close() if write_file != file
	end

end