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const _ = require("lodash");
const Annotation = require("./Annotation");
const Collection = require("./Collection");
const PropertyValue = require("./PropertyValue");
const Record = require("./Record");
const constantExpressions = [
"Binary",
"Bool",
"Date",
"DateTimeOffset",
"Decimal",
"Duration",
"EnumMember",
"Float",
"Guid",
"Int",
"String",
"TimeOfDay",
];
const scalarExpressions = constantExpressions.concat([
"AnnotationPath",
"NavigationPropertyPath",
"Path",
"PropertyPath",
]);
function defineSingleValueProperty(element, propertyName, values) {
if (values.length === 1) {
Object.defineProperty(element, propertyName, {
get: () => values[0],
});
}
}
function parseConstantExpression(element, propertyName, elementId) {
let values = [element.raw.$ ? element.raw.$[propertyName] : undefined]
.concat(element.raw[propertyName])
.filter(Boolean);
defineSingleValueProperty(element, _.lowerFirst(propertyName), values);
if (values.length > 1) {
throw new Error(
`Multiple '${propertyName}' values defined for ${elementId}`
);
}
}
/**
* Class for construction annotation values.
*
* @class ExpressionBuilder
*/
class ExpressionBuilder {
static get scalarExpressions() {
return scalarExpressions;
}
static buildAnnotation(annotationMetadata) {
return new Annotation(annotationMetadata, ExpressionBuilder);
}
static buildCollection(collectionMetadata) {
return new Collection(collectionMetadata, ExpressionBuilder);
}
static buildRecord(recordMetadata) {
return new Record(recordMetadata, ExpressionBuilder);
}
static buildPropertyValue(propertyValueMetadata) {
return new PropertyValue(propertyValueMetadata, ExpressionBuilder);
}
static assignElementValue(element, elementId) {
scalarExpressions.forEach((p) =>
parseConstantExpression(element, p, elementId)
);
let collections = _.get(element.raw, "Collection", []).map(
ExpressionBuilder.buildCollection
);
defineSingleValueProperty(element, "collection", collections);
let records = _.get(element.raw, "Record", []).map(
ExpressionBuilder.buildRecord
);
defineSingleValueProperty(element, "record", records);
let expressionCount =
collections.length +
records.length +
scalarExpressions.filter((e) => element[_.lowerFirst(e)] !== undefined)
.length;
if (expressionCount > 1) {
throw new Error(
`${elementId} has multiple (${expressionCount}) value expressions.`
);
}
}
}
module.exports = ExpressionBuilder;
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