test_graph

v0.1.0

test_graph v0.1.0 TestGraph.LPG

Module for reading and writing a library of LPG graphs and Cypher queries.

The read_graph/1 and write_graph/2 functions allow for reading and writing RDF graphs to the project data repository. (Default file names are provided with the read_graph/0 and write_graph/1 forms.) The list_graphs/0 function lists graph file names.

The read_query/1 and write_query/2 functions allow for reading and writing SPARQL queries to the project data repository. (Default file names are provided with the read_query/0 and write_query/1 forms.) The list_queries/0 function lists query file names.

The books/0 and movies/0 functions return LPG example graphs.

Some simple accessor functions are also available:

Link to this section Summary

Functions

books()

Reads a Books graph from the graphs library

graph_file()

Returns the default LPG graph file

graphs_dir()

Returns the LPG graphs directory

list_graphs()

Lists Cypher graphs in the LPG graphs library

list_queries()

Lists Cypher queries in the LPG queries library

movies()

Reads a Movies graph from the graphs library

queries_dir()

Returns the LPG queries directory

query_file()

Returns the default Cypher query file

read_graph(graph_file \\ graph_file())

Reads a user LPG graph from the LPG graphs library

read_query(query_file \\ query_file())

Reads a Cypher query from the LPG queries library

temp_graph_file()

Returns the temp LPG graph file for writing

temp_query_file()

Returns the temp Cypher query file for writing

write_graph(graph_data, graph_file \\ temp_graph_file())

Writes a LPG graph to a user file in the LPG graphs library

write_query(query_data, query_file \\ temp_query_file())

Writes a Cypher query to a file in the LPG queries library

Link to this section Functions

Link to this function

books()

Reads a Books graph from the graphs library.

Examples 

iex> books().data
"CREATE\n(book:Book {\n    iri: \"urn:isbn:978-1-68050-252-7\",\n"
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graph_file()

Returns the default LPG graph file.

Examples 

iex> TestGraph.LPG.graph_file()
"default.cypher"
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graphs_dir()

Returns the LPG graphs directory.

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list_graphs()

Lists Cypher graphs in the LPG graphs library.

Examples 

iex> list_graphs()
["movies.cypher", "books.cypher", "default.cypher"]
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list_queries()

Lists Cypher queries in the LPG queries library.

Examples 

iex> list_queries()
["relationship1.cypher", "node1_and_relationships.cypher", "path1.cypher",
 "paths.cypher", "relationship_ids.cypher", "relationships.cypher",
 "node_by_id.cypher", "default.cypher", "nodes.cypher", "node_id1.cypher",
 "node_ids.cypher", "nodes_and_relationships.cypher", "node1.cypher",
 "relationship_by_id.cypher"]
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movies()

Reads a Movies graph from the graphs library.

Examples 

iex> movies().data
"CREATE (TheMatrix:Movie {title:'The Matrix', released:1999,..."
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queries_dir()

Returns the LPG queries directory.

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query_file()

Returns the default Cypher query file.

Examples 

iex> TestGraph.LPG.query_file()
"default.cypher"
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read_graph(graph_file \\ graph_file())

Reads a user LPG graph from the LPG graphs library.

Examples 

iex> read_graph()
%TestGraph.Graph{
  data: "//\n// create nodes\n//\nCREATE\n(book:Book {\n..."
  file: "default.cypher",
  path:  ".../test_graph/priv/lpg/graphs/default.cypher",
  type: :lpg,
  uri: "file:///.../test_graph/priv/lpg/graphs/default.cypher"
}

iex> read_graph("books.cypher")
%TestGraph.Graph{
  data: "//\n// create nodes\n//\nCREATE\n(book:Book {\n..."
  file: "books.cypher",
  path: ".../test_graph/priv/lpg/graphs/books.cypher",
  type: :lpg,
  uri: "file:///.../test_graph/priv/lpg/graphs/books.cypher"
}
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read_query(query_file \\ query_file())

Reads a Cypher query from the LPG queries library.

Examples 

iex> read_query()
%TestGraph.Query{
  data: "match (n) return n\n"
  file: "nodes.cypher",
  path: ".../test_graph/priv/lpg/queries/nodes.cypher",
  type: :lpg,
  uri: "file:///.../test_graph/priv/lpg/queries/nodes.cypher"
}

iex> read_query("nodes.cypher")
%TestGraph.Query{
  data: "match (n) return n\n"
  file: "nodes.cypher",
  path: ".../test_graph/priv/lpg/queries/nodes.cypher",
  type: :lpg,
  uri: "file:///.../test_graph/priv/lpg/queries/nodes.cypher"
}
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temp_graph_file()

Returns the temp LPG graph file for writing.

Examples 

iex> TestGraph.LPG.temp_graph_file()
"temp.cypher"
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temp_query_file()

Returns the temp Cypher query file for writing.

Examples 

iex> TestGraph.LPG.temp_query_file()
"temp.cypher"
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write_graph(graph_data, graph_file \\ temp_graph_file())

Writes a LPG graph to a user file in the LPG graphs library.

Examples 

iex> data |> write_graph("my.cypher")
%TestGraph.Graph{
  data: "//\n// create nodes\n//\nCREATE\n(book:Book {\n..."
  file: "my.cypher",
  path:  ".../test_graph/priv/lpg/graphs/my.cypher",
  type: :lpg,
  uri: "file:///.../test_graph/priv/lpg/graphs/my.cypher"
}
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write_query(query_data, query_file \\ temp_query_file())

Writes a Cypher query to a file in the LPG queries library.

Examples 

iex> write_query("my.cypher")
%TestGraph.Query{
  data: "match (n) return n\n"
  file: "my.cypher",
  path: "/test_graph/priv/lpg/queries/my.cypher",
  type: :lpg,
  uri: "file:///.../test_graph/priv/lpg/queries/my.cypher"
}