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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| goog.module('protobuf.runtime.BinaryStorage'); | ||
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| const Storage = goog.require('protobuf.runtime.Storage'); | ||
| const {checkDefAndNotNull} = goog.require('protobuf.internal.checks'); | ||
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| /** | ||
| * Class storing all the fields of a binary protobuf message. | ||
| * | ||
| * @package | ||
| * @template FieldType | ||
| * @implements {Storage} | ||
| */ | ||
| class BinaryStorage { | ||
| /** | ||
| * @param {number=} pivot | ||
| */ | ||
| constructor(pivot = Storage.DEFAULT_PIVOT) { | ||
| /** | ||
| * Fields having a field number no greater than the pivot value are stored | ||
| * into an array for fast access. A field with field number X is stored into | ||
| * the array position X - 1. | ||
| * | ||
| * @private @const {!Array<!FieldType|undefined>} | ||
| */ | ||
| this.array_ = new Array(pivot); | ||
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| /** | ||
| * Fields having a field number higher than the pivot value are stored into | ||
| * the map. We create the map only when it's needed, since even an empty map | ||
| * takes up a significant amount of memory. | ||
| * | ||
| * @private {?Map<number, !FieldType>} | ||
| */ | ||
| this.map_ = null; | ||
| } | ||
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| /** | ||
| * Fields having a field number no greater than the pivot value are stored | ||
| * into an array for fast access. A field with field number X is stored into | ||
| * the array position X - 1. | ||
| * @return {number} | ||
| * @override | ||
| */ | ||
| getPivot() { | ||
| return this.array_.length; | ||
| } | ||
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| /** | ||
| * Sets a field in the specified field number. | ||
| * | ||
| * @param {number} fieldNumber | ||
| * @param {!FieldType} field | ||
| * @override | ||
| */ | ||
| set(fieldNumber, field) { | ||
| if (fieldNumber <= this.getPivot()) { | ||
| this.array_[fieldNumber - 1] = field; | ||
| } else { | ||
| if (this.map_) { | ||
| this.map_.set(fieldNumber, field); | ||
| } else { | ||
| this.map_ = new Map([[fieldNumber, field]]); | ||
| } | ||
| } | ||
| } | ||
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| /** | ||
| * Returns a field at the specified field number. | ||
| * | ||
| * @param {number} fieldNumber | ||
| * @return {!FieldType|undefined} | ||
| * @override | ||
| */ | ||
| get(fieldNumber) { | ||
| if (fieldNumber <= this.getPivot()) { | ||
| return this.array_[fieldNumber - 1]; | ||
| } else { | ||
| return this.map_ ? this.map_.get(fieldNumber) : undefined; | ||
| } | ||
| } | ||
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| /** | ||
| * Deletes a field from the specified field number. | ||
| * | ||
| * @param {number} fieldNumber | ||
| * @override | ||
| */ | ||
| delete(fieldNumber) { | ||
| if (fieldNumber <= this.getPivot()) { | ||
| delete this.array_[fieldNumber - 1]; | ||
| } else { | ||
| if (this.map_) { | ||
| this.map_.delete(fieldNumber); | ||
| } | ||
| } | ||
| } | ||
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| /** | ||
| * Executes the provided function once for each field. | ||
| * | ||
| * @param {function(!FieldType, number): void} callback | ||
| * @override | ||
| */ | ||
| forEach(callback) { | ||
| this.array_.forEach((field, fieldNumber) => { | ||
| if (field) { | ||
| callback(checkDefAndNotNull(field), fieldNumber + 1); | ||
| } | ||
| }); | ||
| if (this.map_) { | ||
| this.map_.forEach(callback); | ||
| } | ||
| } | ||
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| /** | ||
| * Creates a shallow copy of the storage. | ||
| * | ||
| * @return {!BinaryStorage} | ||
| * @override | ||
| */ | ||
| shallowCopy() { | ||
| const copy = new BinaryStorage(this.getPivot()); | ||
| this.forEach( | ||
| (field, fieldNumber) => | ||
| void copy.set(fieldNumber, field.shallowCopy())); | ||
| return copy; | ||
| } | ||
| } | ||
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| exports = BinaryStorage; |
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