202 lines
5.3 KiB
TypeScript
202 lines
5.3 KiB
TypeScript
import '@ms/core'
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/**
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* 反射工具类
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* Created by 蒋天蓓 on 2017/2/9 0009.
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*/
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const JavaClass = Java.type('java.lang.Class');
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const JavaObject = Java.type('java.lang.Object')
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const NoSuchFieldException = Java.type('java.lang.NoSuchFieldException');
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const methodCache = [];
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class Reflect {
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private obj: any;
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private class: any
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constructor(obj: any) {
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if (obj instanceof JavaClass) {
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this.obj = null;
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this.class = obj;
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} else {
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this.obj = obj;
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if (obj !== null && obj !== undefined && obj.class) {
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this.class = obj.class;
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}
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}
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}
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method(...args: any[]) {
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return declaredMethod(this.class, args[0], types(args.slice(1)));
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}
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methods() {
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return Java.from(declaredMethods(this.class));
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}
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field(name): Reflect {
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try {
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// Try getting a public field
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let field = this.class.field(name);
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return on(field.get(this.obj));
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} catch (ex) {
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// Try again, getting a non-public field
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return on(accessible(declaredField(this.class, name)).get(this.obj));
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}
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};
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fields(declared = false) {
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return Java.from(declared ? this.class.declaredFields : this.class.fields);
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}
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values(declared = false) {
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let cache = {};
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this.fields(declared).forEach(fed => cache[fed.name] = this.field(fed.name).get())
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return cache;
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}
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call(...args): Reflect {
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let params = args.slice(1);
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let method = accessible(declaredMethod(this.class, args[0], types(params)));
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let result = method.invoke(this.get(), params);
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return result && on(result);
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};
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get(...args): Reflect | any {
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return args.length === 1 ? this.field(args[0]) : this.obj;
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};
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// noinspection JSUnusedGlobalSymbols
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set(name, value): Reflect {
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accessible(declaredField(this.class, name)).set(this.obj, value);
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return this;
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};
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create(...args): Reflect {
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return on(declaredConstructor(this.class, args).newInstance(args));
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};
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}
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/**
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* Get an array of types for an array of objects
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*/
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function types(values, def?) {
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if (values === null) {
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return [];
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}
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let result: any[] = [];
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values.forEach(t => result.push((t || def) ? JavaObject.class : t instanceof JavaClass ? t : t.class));
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return result;
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}
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function accessible(accessible) {
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if (accessible === null) {
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return null;
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}
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if (!accessible.isAccessible()) {
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accessible.setAccessible(true);
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}
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return accessible;
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}
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function declaredConstructor(clazz, param) {
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let constructor;
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try {
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constructor = clazz.getDeclaredConstructor(types(param));
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} catch (ex) {
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try {
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constructor = clazz.getDeclaredConstructor(types(param, true));
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} catch (ex) {
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constructor = clazz.getDeclaredConstructors()[0];
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}
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}
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return accessible(constructor);
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}
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function declaredField(clazz, name) {
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let clazzt = clazz;
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let field = null;
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// noinspection JSUnresolvedVariable
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while (clazzt !== JavaObject.class) {
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try {
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field = clazzt.getDeclaredField(name);
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if (field !== null) {
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break;
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}
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} catch (e) {
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clazzt = clazzt.getSuperclass();
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}
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}
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if (field === null) {
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throw new NoSuchFieldException(name + " is not found in " + clazz.name);
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}
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return field;
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}
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function declaredMethod(clazz, name, clazzs) {
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let key = clazz.name + '.' + name + ':' + (clazzs || []).join(':');
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if (!methodCache[key]) {
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try {
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methodCache[key] = clazz.getMethod(name, clazzs);
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} catch (ex) {
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try {
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methodCache[key] = clazz.getDeclaredMethod(name, clazzs);
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} catch (ex) {
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for (const m of Java.from(declaredMethods(clazz))) {
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if (m.name == name) {
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methodCache[key] = m;
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break;
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}
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}
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}
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}
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}
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return methodCache[key];
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}
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function declaredMethods(clazz) {
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return clazz.declaredMethods;
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}
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let classMethodsCache: any[] = [];
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function mapToObject(javaObj) {
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if (!javaObj || !javaObj.class) { throw new TypeError(`参数 ${javaObj} 不是一个Java对象!`) }
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let target = {};
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getJavaObjectMethods(javaObj).forEach(t => mapMethod(target, javaObj, t));
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return target;
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}
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function getJavaObjectMethods(javaObj) {
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let className = javaObj.class.name;
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if (!classMethodsCache[className]) {
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let names: any[] = [];
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let methods = javaObj.class.methods;
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for (let i in methods) {
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names.push(methods[i].name);
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}
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classMethodsCache[className] = names;
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}
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return classMethodsCache[className];
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}
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function mapMethod(target, source, name) {
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target[name] = function __SimpleDynamicMethod__(...args) {
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if (args.length > 0) {
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return source[name](args);
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} else {
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return source[name]();
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}
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};
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}
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function on(obj) {
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// if (!obj || !obj.class) { throw new TypeError(`参数 ${obj} 不是一个Java对象!`) }
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return new Reflect(obj);
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}
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export = {
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on,
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accessible,
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declaredMethods,
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mapToObject
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};
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