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import { DataItem } from 'ethereum-types';
import { DataTypeFactory, MemberDataType } from '../abstract_data_types';
import * as Constants from '../constants';
export class Array extends MemberDataType {
private static readonly _matcher = RegExp('^(.+)\\[([0-9]*)\\]$');
private readonly _arraySignature: string;
private readonly _elementType: string;
public static matchType(type: string): boolean {
return Array._matcher.test(type);
}
public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
// Sanity check
const matches = Array._matcher.exec(dataItem.type);
if (matches === null || matches.length !== 3) {
throw new Error(`Could not parse array: ${dataItem.type}`);
} else if (matches[1] === undefined) {
throw new Error(`Could not parse array type: ${dataItem.type}`);
} else if (matches[2] === undefined) {
throw new Error(`Could not parse array length: ${dataItem.type}`);
}
const isArray = true;
const arrayElementType = matches[1];
const arrayLength = matches[2] === '' ? undefined : parseInt(matches[2], Constants.DEC_BASE);
super(dataItem, dataTypeFactory, isArray, arrayLength, arrayElementType);
this._elementType = arrayElementType;
this._arraySignature = this._computeSignature();
}
public getSignature(): string {
return this._arraySignature;
}
private _computeSignature(): string {
const dataItem: DataItem = {
type: this._elementType,
name: 'N/A',
};
const components = this.getDataItem().components;
if (components !== undefined) {
dataItem.components = components;
}
const elementDataType = this.getFactory().mapDataItemToDataType(dataItem);
const type = elementDataType.getSignature();
if (this._arrayLength === undefined) {
return `${type}[]`;
} else {
return `${type}[${this._arrayLength}]`;
}
}
}
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