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Contents
module Neo4j::Embedded
class EmbeddedLabel
extend Neo4j::Core::TxMethods
attr_reader :name
JAVA_CLASS = Java::OrgNeo4jGraphdb::DynamicLabel
def initialize(session, name)
@name = name.to_sym
@session = session
end
def to_s
@name
end
def find_nodes(key=nil, value=nil)
begin
iterator = _find_nodes(key,value)
iterator.to_a.map{|n| n.wrapper}
ensure
iterator && iterator.close
end
end
tx_methods :find_nodes
def _find_nodes(key=nil, value=nil)
if (key)
@session.graph_db.find_nodes_by_label_and_property(as_java, key, value).iterator
else
ggo = Java::OrgNeo4jTooling::GlobalGraphOperations.at(@session.graph_db)
ggo.getAllNodesWithLabel(as_java).iterator
end
end
def as_java
self.class.as_java(@name.to_s)
end
def create_index(*properties)
index_creator = @session.graph_db.schema.index_for(as_java)
# we can also use the PropertyConstraintCreator here
properties.inject(index_creator) {|creator, key| creator.on(key.to_s)}.create
end
tx_methods :create_index
def indexes()
{
property_keys: @session.graph_db.schema.indexes(as_java).map do |index_def|
index_def.property_keys.map{|x| x.to_sym}
end
}
end
tx_methods :indexes
def drop_index(*properties)
@session.graph_db.schema.indexes(as_java).each do |index_def|
# at least one match, TODO
keys = index_def.property_keys.map{|x| x.to_sym}
index_def.drop if (properties - keys).count < properties.count
end
end
tx_methods :drop_index
class << self
def as_java(labels)
if labels.is_a?(Array)
return nil if labels.empty?
labels.inject([]) { |result, label| result << JAVA_CLASS.label(label.to_s) }.to_java(JAVA_CLASS)
else
JAVA_CLASS.label(labels.to_s)
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems