57 lines
1.5 KiB
Python
57 lines
1.5 KiB
Python
from .Normalization import Normalization
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from .Guid import Guid
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class InstanceCache:
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def __init__(self):
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self.next_inst_id = dict()
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self.next_inst_id[1] = 1
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self.inst_indices = dict()
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self.inst_guids = dict()
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self.dbids_gid = dict()
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def add_instance(self, inst_key, inst_gid):
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self.inst_guids[inst_key] = inst_gid
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self.inst_indices[inst_gid] = inst_key
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if not inst_key[0] in self.next_inst_id:
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self.next_inst_id[inst_key[0]] = 1
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if inst_key[1] >= self.next_inst_id[inst_key[0]]:
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self.next_inst_id[inst_key[0]] = inst_key[1] + 1
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def get_global_identifier(self, inst_key):
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return self.inst_guids[inst_key]
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def get_instance_key(self, inst_gid):
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return self.inst_indices[inst_gid]
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def get_next_instance_id(self, class_index):
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if not class_index in self.next_inst_id:
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# this is the first instance of this class
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self.next_inst_id[class_index] = 1
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val = self.next_inst_id[class_index]
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self.next_inst_id[class_index] += 1
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return val
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def has_instance_by_global_identifier(self, gid):
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return gid in self.inst_indices
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def count(self) -> int:
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"""
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Returns the number of instances stored in this OMS.
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"""
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return len(self.inst_indices)
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def get_instance_keys(self):
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return self.inst_indices
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def set_database_id_by_global_identifier(self, gid : Guid, dbid):
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self.dbids_gid[Normalization.normalize_uuid(gid.get_value())] = dbid
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# self.dbids_idx[self.inst_indices[gid]] = dbid
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def get_database_id_by_global_identifier(self, gid : Guid):
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return self.dbids_gid[Normalization.normalize_uuid(gid.get_value())] |