com.caoccao.javet.interop.proxy.BaseJavetProxySymbolConverter 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.
There is a newer version: 4.0.0
/*
 * Copyright (c) 2021-2022. 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;

import com.caoccao.javet.annotations.CheckReturnValue;
import com.caoccao.javet.exceptions.JavetError;
import com.caoccao.javet.exceptions.JavetException;
import com.caoccao.javet.interop.V8Runtime;
import com.caoccao.javet.interop.callback.JavetCallbackContext;
import com.caoccao.javet.interop.converters.JavetObjectConverter;
import com.caoccao.javet.utils.SimpleMap;
import com.caoccao.javet.values.V8Value;
import com.caoccao.javet.values.reference.V8ValueFunction;

/**
 * The type Base javet proxy symbol converter.
 *
 * @param  the type parameter
 * @since 1.0.4
 */
public abstract class BaseJavetProxySymbolConverter implements IJavetProxySymbolConverter {
    /**
     * The constant METHOD_NAME_TO_V8_VALUE.
     *
     * @since 1.0.4
     */
    protected static final String METHOD_NAME_TO_V8_VALUE = "toV8Value";
    /**
     * The constant NULL.
     *
     * @since 2.0.0
     */
    protected static final String NULL = "null";
    /**
     * The constant OBJECT_CONVERTER.
     *
     * @since 1.0.4
     */
    protected static final JavetObjectConverter OBJECT_CONVERTER = new JavetObjectConverter();
    /**
     * The Target object.
     *
     * @since 1.0.4
     */
    protected T targetObject;
    /**
     * The V8 runtime.
     *
     * @since 1.0.4
     */
    protected V8Runtime v8Runtime;

    /**
     * Instantiates a new Base javet proxy symbol converter.
     *
     * @param v8Runtime    the V8 runtime
     * @param targetObject the target object
     * @since 1.0.4
     */
    public BaseJavetProxySymbolConverter(V8Runtime v8Runtime, T targetObject) {
        this.targetObject = targetObject;
        this.v8Runtime = v8Runtime;
    }

    @CheckReturnValue
    @Override
    public V8ValueFunction getV8ValueFunction() throws JavetException {
        try {
            JavetCallbackContext javetCallbackContext = new JavetCallbackContext(
                    this, getClass().getMethod(METHOD_NAME_TO_V8_VALUE, V8Value[].class));
            return v8Runtime.createV8ValueFunction(javetCallbackContext);
        } catch (NoSuchMethodException e) {
            throw new JavetException(JavetError.CallbackMethodFailure,
                    SimpleMap.of(
                            JavetError.PARAMETER_METHOD_NAME, METHOD_NAME_TO_V8_VALUE,
                            JavetError.PARAMETER_MESSAGE, e.getMessage()), e);
        }
    }

    /**
     * To V8 value.
     *
     * @param v8Values the V8 values
     * @return the V8 value
     * @throws JavetException the javet exception
     * @since 1.0.4
     */
    @CheckReturnValue
    public V8Value toV8Value(V8Value... v8Values) throws JavetException {
        return OBJECT_CONVERTER.toV8Value(v8Runtime, targetObject);
    }
}