Source code for hyperstream.models.stream

# The MIT License (MIT) # Copyright (c) 2014-2017 University of Bristol
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from mongoengine import Document, DateTimeField, StringField, DynamicField, EmbeddedDocumentListField, \
    EmbeddedDocument, EmbeddedDocumentField, ListField

from .time_interval import TimeIntervalModel
from ..time_interval import TimeInterval, TimeIntervals


class StreamIdField(EmbeddedDocument):
    name = StringField(required=True, min_length=1, max_length=512)
    meta_data = ListField(required=False)


class StreamInstanceModel(Document):
    stream_id = EmbeddedDocumentField(document_type=StreamIdField, required=True)
    stream_type = StringField(required=False, min_length=1, max_length=512)
    datetime = DateTimeField(required=True)
    # tool_version = StringField(required=True, min_length=1, max_length=512)
    value = DynamicField(required=True)
    
    meta = {
        'collection': 'streams',
        'indexes': [
            {'fields': ['stream_id']},
            {'fields': ['stream_id', 'datetime'], 'unique': True}
        ],
        'ordering': ['datetime']
    }


class StreamDefinitionModel(Document):
    stream_id = EmbeddedDocumentField(document_type=StreamIdField, required=True)
    stream_type = StringField(required=False, min_length=1, max_length=512)
    channel_id = StringField(required=True, min_length=1, max_length=512)
    last_updated = DateTimeField(required=False)
    last_accessed = DateTimeField(required=False)
    calculated_intervals = EmbeddedDocumentListField(document_type=TimeIntervalModel, required=False)
    sandbox = StringField()

    meta = {
        'collection': 'stream_definitions',
        'indexes': [{'fields': ['stream_id'], 'unique': True}],
    }

    def get_calculated_intervals(self):
        return TimeIntervals(map(lambda x: TimeInterval(x.start, x.end), self.calculated_intervals))

    def set_calculated_intervals(self, intervals):
        if intervals is None:
            intervals = []
        self.calculated_intervals = tuple(map(lambda x: TimeIntervalModel(start=x.start, end=x.end), intervals))