com.caoccao.javet.interop.proxy.plugins.BaseJavetProxyPluginSingle Maven / Gradle / Ivy

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Javet is Java + V8 (JAVa + V + EighT). It is an awesome way of embedding Node.js and V8 in Java.
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/*
 * Copyright (c) 2024. caoccao.com Sam Cao
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.caoccao.javet.interop.proxy.plugins;

import com.caoccao.javet.exceptions.JavetException;
import com.caoccao.javet.interop.V8Runtime;
import com.caoccao.javet.interop.binding.IClassProxyPluginFunction;
import com.caoccao.javet.values.V8Value;

import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

/**
 * The type Base javet proxy plugin for single class.
 *
 * @since 3.0.4
 */
@SuppressWarnings("unchecked")
public abstract class BaseJavetProxyPluginSingle extends BaseJavetProxyPlugin {
    /**
     * The Proxy get by string map.
     *
     * @since 3.0.4
     */
    protected final Map> proxyGetByStringMap;
    /**
     * The Proxy get by symbol map.
     *
     * @since 3.0.4
     */
    protected final Map> proxyGetBySymbolMap;

    /**
     * Instantiates a new Base javet proxy plugin for single class.
     *
     * @since 3.0.4
     */
    public BaseJavetProxyPluginSingle() {
        super();
        proxyGetByStringMap = new HashMap<>();
        proxyGetBySymbolMap = new HashMap<>();
    }

    /**
     * Create target object.
     *
     * @param v8Runtime    the V8 runtime
     * @param targetObject the target object
     * @return the V8 value
     * @throws JavetException the javet exception
     * @since 3.0.4
     */
    protected abstract V8Value createTargetObject(V8Runtime v8Runtime, Object targetObject) throws JavetException;

    @Override
    public  IClassProxyPluginFunction getProxyGetByString(
            Class targetClass, String propertyName) {
        return (IClassProxyPluginFunction) proxyGetByStringMap.get(propertyName);
    }

    @Override
    public  IClassProxyPluginFunction getProxyGetBySymbol(
            Class targetClass, String symbolName) {
        return (IClassProxyPluginFunction) Optional.ofNullable(proxyGetBySymbolMap.get(symbolName))
                .orElse(super.getProxyGetBySymbol(targetClass, symbolName));
    }

    @Override
    public  IClassProxyPluginFunction getTargetObjectConstructor(Class targetClass) {
        return this::createTargetObject;
    }

    /**
     * Validate and return target object.
     *
     * @param targetObject the target object
     * @return the typed target object
     * @since 3.0.4
     */
    protected abstract T validateTargetObject(Object targetObject);
}