pip-services3-commons-nodex
Version:
Portable abstractions and patterns for Pip.Services in Node.js / ES2017
193 lines • 8.12 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.TypeConverter = void 0;
/** @module convert */
const TypeCode_1 = require("./TypeCode");
const StringConverter_1 = require("./StringConverter");
const BooleanConverter_1 = require("./BooleanConverter");
const IntegerConverter_1 = require("./IntegerConverter");
const LongConverter_1 = require("./LongConverter");
const FloatConverter_1 = require("./FloatConverter");
const DoubleConverter_1 = require("./DoubleConverter");
const DateTimeConverter_1 = require("./DateTimeConverter");
const ArrayConverter_1 = require("./ArrayConverter");
const MapConverter_1 = require("./MapConverter");
/**
* Converts arbitrary values into objects specific by TypeCodes.
* For each TypeCode this class calls corresponding converter which applies
* extended conversion rules to convert the values.
*
* @see [[TypeCode]]
*
* ### Example ###
*
* let value1 = TypeConverter.toType(TypeCode.Integer, "123.456"); // Result: 123
* let value2 = TypeConverter.toType(TypeCode.DateTime, 123); // Result: Date(123)
* let value3 = TypeConverter.toType(TypeCode.Boolean, "F"); // Result: false
*/
class TypeConverter {
/**
* Gets TypeCode for specific value.
*
* @param value value whose TypeCode is to be resolved.
* @returns the TypeCode that corresponds to the passed object's type.
*/
static toTypeCode(value) {
if (value == null)
return TypeCode_1.TypeCode.Unknown;
if (Array.isArray(value))
return TypeCode_1.TypeCode.Array;
if (typeof value === "boolean")
return TypeCode_1.TypeCode.Boolean;
if (value instanceof Date)
return TypeCode_1.TypeCode.DateTime;
if (Number.isInteger(value))
return TypeCode_1.TypeCode.Long;
if (typeof value === "number")
return TypeCode_1.TypeCode.Double;
if (typeof value === "function")
return TypeCode_1.TypeCode.Object;
if (typeof value === "object")
return TypeCode_1.TypeCode.Map;
if (typeof value === "string") {
// if (value == "undefined")
// return TypeCode.Unknown;
// if (value == "object")
// return TypeCode.Map;
// if (value == "boolean")
// return TypeCode.Boolean;
// if (value == "number")
// return TypeCode.Double;
// if (value == "string")
// return TypeCode.String;
// if (value == "function")
// return TypeCode.Object;
return TypeCode_1.TypeCode.String;
}
return TypeCode_1.TypeCode.Object;
}
/**
* Converts value into an object type specified by Type Code or returns null when conversion is not possible.
*
* @param type the TypeCode for the data type into which 'value' is to be converted.
* @param value the value to convert.
* @returns object value of type corresponding to TypeCode, or null when conversion is not supported.
*
* @see [[toTypeCode]]
*/
static toNullableType(type, value) {
if (value == null)
return null;
// Convert to known types
if (type == TypeCode_1.TypeCode.String)
value = StringConverter_1.StringConverter.toNullableString(value);
else if (type == TypeCode_1.TypeCode.Boolean)
value = BooleanConverter_1.BooleanConverter.toNullableBoolean(value);
else if (type == TypeCode_1.TypeCode.Integer)
value = IntegerConverter_1.IntegerConverter.toNullableInteger(value);
else if (type == TypeCode_1.TypeCode.Long)
value = LongConverter_1.LongConverter.toNullableLong(value);
else if (type == TypeCode_1.TypeCode.Float)
value = FloatConverter_1.FloatConverter.toNullableFloat(value);
else if (type == TypeCode_1.TypeCode.Double)
value = DoubleConverter_1.DoubleConverter.toNullableDouble(value);
else if (type == TypeCode_1.TypeCode.DateTime)
value = DateTimeConverter_1.DateTimeConverter.toNullableDateTime(value);
else if (type == TypeCode_1.TypeCode.Array)
value = ArrayConverter_1.ArrayConverter.toNullableArray(value);
else if (type == TypeCode_1.TypeCode.Map)
value = MapConverter_1.MapConverter.toNullableMap(value);
return value;
}
/**
* Converts value into an object type specified by Type Code or returns type default when conversion is not possible.
*
* @param type the TypeCode for the data type into which 'value' is to be converted.
* @param value the value to convert.
* @returns object value of type corresponding to TypeCode, or type default when conversion is not supported.
*
* @see [[toNullableType]]
* @see [[toTypeCode]]
*/
static toType(type, value) {
// Convert to the specified type
let result = TypeConverter.toNullableType(type, value);
if (result != null)
return result;
// Define and return default value based on type
if (type == TypeCode_1.TypeCode.Integer)
value = 0;
else if (type == TypeCode_1.TypeCode.Long)
value = 0;
else if (type == TypeCode_1.TypeCode.Float)
value = 0;
else if (type == TypeCode_1.TypeCode.Double)
value = 0;
else if (type == TypeCode_1.TypeCode.Boolean) // cases from here down were added by Mark Makarychev.
value = false;
else if (type == TypeCode_1.TypeCode.String)
value = "";
else if (type == TypeCode_1.TypeCode.DateTime)
value = new Date();
else if (type == TypeCode_1.TypeCode.Map)
value = {};
else if (type == TypeCode_1.TypeCode.Array)
value = [];
return value;
}
/**
* Converts value into an object type specified by Type Code or returns default value when conversion is not possible.
*
* @param type the TypeCode for the data type into which 'value' is to be converted.
* @param value the value to convert.
* @param defaultValue the default value to return if conversion is not possible (returns null).
* @returns object value of type corresponding to TypeCode, or default value when conversion is not supported.
*
* @see [[toNullableType]]
* @see [[toTypeCode]]
*/
static toTypeWithDefault(type, value, defaultValue) {
let result = TypeConverter.toNullableType(type, value);
return result != null ? result : defaultValue;
}
/**
* Converts a TypeCode into its string name.
*
* @param type the TypeCode to convert into a string.
* @returns the name of the TypeCode passed as a string value.
*/
static toString(type) {
switch (type) {
case TypeCode_1.TypeCode.Unknown:
return "unknown";
case TypeCode_1.TypeCode.String:
return "string";
case TypeCode_1.TypeCode.Boolean:
return "boolean";
case TypeCode_1.TypeCode.Integer:
return "integer";
case TypeCode_1.TypeCode.Long:
return "long";
case TypeCode_1.TypeCode.Float:
return "float";
case TypeCode_1.TypeCode.Double:
return "double";
case TypeCode_1.TypeCode.DateTime:
return "datetime";
case TypeCode_1.TypeCode.Duration:
return "duration";
case TypeCode_1.TypeCode.Object:
return "object";
case TypeCode_1.TypeCode.Enum:
return "enum";
case TypeCode_1.TypeCode.Array:
return "array";
case TypeCode_1.TypeCode.Map:
return "map";
default:
return "unknown";
}
}
}
exports.TypeConverter = TypeConverter;
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