44 lines
1.5 KiB
TypeScript
44 lines
1.5 KiB
TypeScript
import {BaseException} from "angular2/src/facade/lang";
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/**
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* An error thrown if application changes model breaking the top-down data flow.
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*
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* Angular expects that the data flows from top (root) component to child (leaf) components.
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* This is known as directed acyclic graph. This allows Angular to only execute change detection
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* once and prevents loops in change detection data flow.
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*
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* This exception is only thrown in dev mode.
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*/
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export class ExpressionChangedAfterItHasBeenCheckedException extends BaseException {
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constructor(exp: string, oldValue: any, currValue: any, context: any) {
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super(`Expression '${exp}' has changed after it was checked. ` +
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`Previous value: '${oldValue}'. Current value: '${currValue}'`);
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}
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}
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/**
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* Thrown when an expression evaluation raises an exception.
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*
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* This error wraps the original exception, this is done to attach expression location information.
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*/
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export class ChangeDetectionError extends BaseException {
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/**
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* Location of the expression.
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*/
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location: string;
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constructor(exp: string, originalException: any, originalStack: any, context: any) {
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super(`${originalException} in [${exp}]`, originalException, originalStack, context);
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this.location = exp;
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}
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}
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/**
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* Thrown when change detector executes on dehydrated view.
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*
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* This is angular internal error.
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*/
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export class DehydratedException extends BaseException {
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constructor() { super('Attempt to detect changes on a dehydrated detector.'); }
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}
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