Summary
BSON cursor provides fast traversal/reads on well formed bson documents.
Much faster than standard approach if, for example, you want to scan or know the structure of millions MongoDB documents.
Installation
npm install bson-cursor --save
Usage
{ bson } = require 'bson'
{ structify, BufferReader } = require 'bson-cursor'
# metadata accumulator
meta = {}
docA = foo: bar: 'aaa'
docB = bar: baz: 2.12
bsonA = new bson.BSON.serialize docA, false, true
bsonB = new bson.BSON.serialize docB, false, true
# get struct from first one
structify new BufferReader(bsonA), false, meta
# update with another struct
structify new BufferReader(bsonB), false, meta
console.log JSON.stringify meta, false, ' '
...will print schema like:
{
"_types": [
"Object"
],
"foo": {
"_types": [
"Object"
],
"bar": {
"_types": [
"String"
]
}
},
"bar": {
"_types": [
"Object"
],
"baz": {
"_types": [
"Double"
]
}
}
}
License
The MIT License (MIT)
Copyright (c) 2014 Mirek Rusin
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.