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import collections |
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try: |
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3
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import ujson as json |
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4
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except ImportError: |
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5
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import json |
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6
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7
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from gremlin_python.structure.io.graphsonV3d0 import GraphSONWriter |
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8
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from goblin.element import Vertex, Edge, VertexProperty |
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9
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from goblin.manager import ListVertexPropertyManager |
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10
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11
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12
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writer = GraphSONWriter() |
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13
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14
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15
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AdjList = collections.namedtuple("AdjList", "vertex inE outE") |
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16
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vp_id = 10 |
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19
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20
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def dump(fpath, *adj_lists, mode="w"): |
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"""Convert Goblin elements to GraphSON""" |
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with open(fpath, mode) as f: |
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for adj_list in adj_lists: |
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dumped = dumps(adj_list) |
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f.write(dumped + '\n') |
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def dumps(adj_list): |
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"""Convert Goblin elements to GraphSON""" |
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vertex = _prep_vertex(adj_list.vertex) |
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for inE in adj_list.inE: |
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prepped = _prep_edge(inE, "inV") |
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label = inE.__label__ |
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vertex["inE"].setdefault(label, []) |
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vertex["inE"][label].append(prepped) |
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36
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for outE in adj_list.outE: |
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prepped = _prep_edge(outE, "outV") |
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label = outE.__label__ |
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vertex["outE"].setdefault(label, []) |
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40
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vertex["outE"][label].append(prepped) |
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return json.dumps(vertex) |
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42
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43
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44
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def _prep_edge(e, t): |
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if t == 'inV': |
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other = "outV" |
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other_id = e.source.id |
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48
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elif t == 'outV': |
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other = "inV" |
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50
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other_id = e.target.id |
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51
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else: |
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52
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raise RuntimeError('Invalid edge type') |
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53
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edge = { |
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54
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"id": { |
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55
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"@type": "g:Int32", |
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56
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"@value": e.id, |
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57
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58
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}, |
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other: { |
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"@type": "g:Int32", |
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"@value": other_id, |
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}, |
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63
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"properties": {} |
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64
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} |
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65
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for db_name, (ogm_name, _) in e.__mapping__.db_properties.items(): |
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edge["properties"][db_name] = writer.toDict(getattr(e, ogm_name)) |
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68
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return edge |
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69
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70
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71
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def _prep_vertex(v): |
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global vp_id |
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mapping = v.__mapping__ |
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properties = v.__properties__ |
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75
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vertex = { |
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76
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"id": { |
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"@type": "g:Int32", |
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"@value": v.id |
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}, |
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80
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"label": v.__label__, |
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81
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"properties": {}, |
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82
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"outE": {}, |
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83
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"inE": {} |
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84
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} |
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85
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86
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87
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88
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for db_name, (ogm_name, _) in mapping.db_properties.items(): |
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89
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prop = properties[ogm_name] |
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90
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vertex["properties"].setdefault(db_name, []) |
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91
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if isinstance(prop, VertexProperty): |
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92
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prop = getattr(v, ogm_name) |
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93
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if isinstance(prop, ListVertexPropertyManager): |
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for p in prop: |
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95
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value = p.value |
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96
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vp = _prep_vp(p, value, v, db_name) |
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97
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vp_id += 1 |
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98
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vertex["properties"][db_name].append(vp) |
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99
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continue |
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100
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else: |
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101
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value = prop.value |
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102
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else: |
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103
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value = getattr(v, ogm_name) |
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104
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vp = _prep_vp(prop, value, v, db_name) |
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vp_id += 1 |
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106
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vertex["properties"][db_name].append(vp) |
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107
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return vertex |
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108
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109
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110
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def _prep_vp(prop, value, v, db_name): |
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111
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vp = { |
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112
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"id": { |
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113
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"@type": "g:Int64", |
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114
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"@value": vp_id |
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115
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}, |
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116
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"value": writer.toDict(value), |
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117
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"properties": {} |
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118
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} |
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119
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if isinstance(prop, VertexProperty): |
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120
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for db_name, (ogm_name, _) in prop.__mapping__.db_properties.items(): |
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121
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vp["properties"][db_name] = writer.toDict(getattr(prop, ogm_name)) |
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122
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return vp |
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123
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124
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125
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126
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def _dump_edge(e): |
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127
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pass |
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128
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goblin-ogm /
goblin
