fromParserSchema

SUPPORT · function · 运行时值

Wrap a library schema that already parses values (for example Zod or Valibot style).

parse is delegated unchanged, so the library keeps ownership of coercion and error reporting; only the JSON Schema projection is produced here.

导入

TypeScript

import { fromParserSchema } from '@jangts/agent-core/support';

JavaScript

import { fromParserSchema } from '@jangts/agent-core/support';

其他公开入口：@jangts/agent-core/support。

定义

泛型参数

类型参数	约束	默认类型
Schema	{ parse(value: unknown): unknown }	—

调用

fromParserSchema<Schema extends { parse(value: unknown): unknown; }>(schema: Schema, options: { toJsonSchema(schema: Schema): JsonSchema; }): SchemaAdapter<ReturnType<Schema["parse"]>>

Wrap a library schema that already parses values (for example Zod or Valibot style).

parse is delegated unchanged, so the library keeps ownership of coercion and error reporting; only the JSON Schema projection is produced here.

类型参数	约束	默认类型
Schema	{ parse(value: unknown): unknown; }	—

参数	类型	传递	说明
schema	Schema	必需	—
options	{ toJsonSchema(schema: Schema): JsonSchema; }	必需	—

options 的字段

字段	类型	必需	说明
toJsonSchema	(schema: Schema) => JsonSchema	必需	见类型定义及调用场景。

返回： SchemaAdapter<ReturnType<Schema["parse"]>>。

返回值结构

字段	类型	必需	说明
jsonSchema	Readonly<Record<string, unknown>>	必需	只读。Schema advertised to the model and used for documentation.
parse	(input: unknown) => ReturnType<Schema["parse"]>	必需	Validates or coerces untrusted input into Value; throws when the input is invalid.

使用示例

• Schema：保留 JSON 声明与实际解析的同一合同：Support 生成规范的 SchemaAdapter，Core 只要求 jsonSchema 与同步 parse 合同。

一个有实际校验的字符串对象

入门 · Node.js

TypeScript

import { Support } from '@jangts/agent-core';
const nameSchema = Support.defineSchema({
  jsonSchema: { type: 'object', properties: { name: { type: 'string' } }, required: ['name'], additionalProperties: false },
  parse(value: unknown) {
    if (!value || typeof value !== 'object' || Array.isArray(value) || Object.keys(value).length !== 1 || !('name' in value) || typeof value.name !== 'string') throw new TypeError('需要 name 字符串');
    return { name: value.name };
  },
});
console.log(nameSchema.parse({ name: 'Ivan' }));

JavaScript

import { Support } from '@jangts/agent-core';
const nameSchema = Support.defineSchema({
    jsonSchema: { type: 'object', properties: { name: { type: 'string' } }, required: ['name'], additionalProperties: false },
    parse(value) {
        if (!value || typeof value !== 'object' || Array.isArray(value) || Object.keys(value).length !== 1 || !('name' in value) || typeof value.name !== 'string')
            throw new TypeError('需要 name 字符串');
        return { name: value.name };
    },
});
console.log(nameSchema.parse({ name: 'Ivan' }));

复用已经拥有的解析对象

配置 · Node.js

实际接解析库时，toJsonSchema 必须准确表达该 parser；不是库名称决定可信度。

TypeScript

import { Support } from '@jangts/agent-core';
class NameParser {
  parse(value: unknown) { if (typeof value !== 'string' || !value.trim()) throw new TypeError('需要非空姓名'); return value.trim(); }
}
const schema = Support.fromParserSchema(new NameParser(), {
  toJsonSchema: () => ({ type: 'string', minLength: 1 }),
});
console.log(schema.parse(' Ivan '));

JavaScript

import { Support } from '@jangts/agent-core';
class NameParser {
    parse(value) { if (typeof value !== 'string' || !value.trim())
        throw new TypeError('需要非空姓名'); return value.trim(); }
}
const schema = Support.fromParserSchema(new NameParser(), {
    toJsonSchema: () => ({ type: 'string', minLength: 1 }),
});
console.log(schema.parse(' Ivan '));

使用已有 JSON Schema 编译端口

扩展 · Node.js

演示显式编译端口，不是一个通用 JSON Schema 编译器；生产可接入 App 已有的成熟编译器。

TypeScript

import { Support } from '@jangts/agent-core';
const schema = Support.fromJsonSchema<number>({ type: 'integer', minimum: 0 }, {
  compile(jsonSchema) {
    if (jsonSchema.type !== 'integer' || jsonSchema.minimum !== 0) throw new Error('本例编译器只处理该规则');
    return (value: unknown): value is number => typeof value === 'number' && Number.isSafeInteger(value) && value >= 0;
  },
});
console.log(schema.parse(3));

JavaScript

import { Support } from '@jangts/agent-core';
const schema = Support.fromJsonSchema({ type: 'integer', minimum: 0 }, {
    compile(jsonSchema) {
        if (jsonSchema.type !== 'integer' || jsonSchema.minimum !== 0)
            throw new Error('本例编译器只处理该规则');
        return (value) => typeof value === 'number' && Number.isSafeInteger(value) && value >= 0;
    },
});
console.log(schema.parse(3));

相关策略源码

• Schema 快照与同步校验规则

相关定义

• JsonSchema
• SchemaAdapter