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81 lines
1.9 KiB
81 lines
1.9 KiB
5 years ago
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/* Copyright (c) 2013 Rod Vagg, MIT License */
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function AbstractChainedBatch (db) {
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this._db = db
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this._operations = []
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this._written = false
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}
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AbstractChainedBatch.prototype._checkWritten = function () {
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if (this._written)
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throw new Error('write() already called on this batch')
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}
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AbstractChainedBatch.prototype.put = function (key, value) {
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this._checkWritten()
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var err = this._db._checkKeyValue(key, 'key', this._db._isBuffer)
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if (err) throw err
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err = this._db._checkKeyValue(value, 'value', this._db._isBuffer)
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if (err) throw err
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if (!this._db._isBuffer(key)) key = String(key)
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if (!this._db._isBuffer(value)) value = String(value)
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if (typeof this._put == 'function' )
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this._put(key, value)
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else
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this._operations.push({ type: 'put', key: key, value: value })
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return this
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}
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AbstractChainedBatch.prototype.del = function (key) {
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this._checkWritten()
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var err = this._db._checkKeyValue(key, 'key', this._db._isBuffer)
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if (err) throw err
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if (!this._db._isBuffer(key)) key = String(key)
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if (typeof this._del == 'function' )
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this._del(key)
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else
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this._operations.push({ type: 'del', key: key })
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return this
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}
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AbstractChainedBatch.prototype.clear = function () {
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this._checkWritten()
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this._operations = []
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if (typeof this._clear == 'function' )
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this._clear()
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return this
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}
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AbstractChainedBatch.prototype.write = function (options, callback) {
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this._checkWritten()
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if (typeof options == 'function')
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callback = options
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if (typeof callback != 'function')
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throw new Error('write() requires a callback argument')
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if (typeof options != 'object')
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options = {}
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this._written = true
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if (typeof this._write == 'function' )
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return this._write(callback)
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if (typeof this._db._batch == 'function')
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return this._db._batch(this._operations, options, callback)
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process.nextTick(callback)
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}
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module.exports = AbstractChainedBatch
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