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81 lines
1.9 KiB
81 lines
1.9 KiB
/* 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 |