com.caoccao.javet.interop.proxy.JavetProxySymbolToPrimitiveConverter 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.exceptions.JavetException;
import com.caoccao.javet.interop.V8Runtime;
import com.caoccao.javet.values.V8Value;
import com.caoccao.javet.values.primitive.V8ValueString;

/**
 * The type Javet proxy symbol to primitive converter.
 *
 * @param  the type parameter
 * @since 1.0.4
 */
public class JavetProxySymbolToPrimitiveConverter extends BaseJavetProxySymbolConverter {
    /**
     * The constant HINT_BOOLEAN.
     *
     * @since 2.0.0
     */
    protected static final String HINT_BOOLEAN = "boolean";
    /**
     * The constant HINT_DEFAULT.
     *
     * @since 2.0.0
     */
    protected static final String HINT_DEFAULT = "default";
    /**
     * The constant HINT_NUMBER.
     *
     * @since 2.0.0
     */
    protected static final String HINT_NUMBER = "number";
    /**
     * The constant HINT_STRING.
     *
     * @since 2.0.0
     */
    protected static final String HINT_STRING = "string";

    /**
     * Instantiates a new Javet proxy symbol to primitive converter.
     *
     * @param v8Runtime    the V8 runtime
     * @param targetObject the target object
     * @since 1.0.4
     */
    public JavetProxySymbolToPrimitiveConverter(V8Runtime v8Runtime, T targetObject) {
        super(v8Runtime, targetObject);
    }

    @Override
    public V8Value toV8Value(V8Value... v8Values) throws JavetException {
        if (targetObject != null && v8Values.length > 0) {
            if (v8Values[0] instanceof V8ValueString) {
                String hintString = ((V8ValueString) v8Values[0]).getValue();
                if (HINT_NUMBER.equals(hintString)) {
                    if (targetObject instanceof Integer) {
                        return v8Runtime.createV8ValueInteger((Integer) targetObject);
                    }
                    if (targetObject instanceof Double) {
                        return v8Runtime.createV8ValueDouble((Double) targetObject);
                    }
                    if (targetObject instanceof Long) {
                        return v8Runtime.createV8ValueInteger(((Long) targetObject).intValue());
                    }
                    if (targetObject instanceof Float) {
                        return v8Runtime.createV8ValueDouble(((Float) targetObject).doubleValue());
                    }
                    return v8Runtime.createV8ValueInteger(0);
                } else if (HINT_STRING.equals(hintString)) {
                    return v8Runtime.createV8ValueString(targetObject.toString());
                } else if (HINT_BOOLEAN.equals(hintString)) {
                    if (targetObject instanceof Boolean) {
                        return v8Runtime.createV8ValueBoolean((Boolean) targetObject);
                    }
                    return v8Runtime.createV8ValueBoolean(false);
                } else if (HINT_DEFAULT.equals(hintString)) {
                    if (targetObject instanceof Integer) {
                        return v8Runtime.createV8ValueInteger((Integer) targetObject);
                    }
                    if (targetObject instanceof Double) {
                        return v8Runtime.createV8ValueDouble((Double) targetObject);
                    }
                    if (targetObject instanceof Long) {
                        return v8Runtime.createV8ValueLong((Long) targetObject);
                    }
                    if (targetObject instanceof Float) {
                        return v8Runtime.createV8ValueDouble(((Float) targetObject).doubleValue());
                    }
                    if (targetObject instanceof Boolean) {
                        return v8Runtime.createV8ValueBoolean((Boolean) targetObject);
                    }
                    return v8Runtime.createV8ValueString(targetObject.toString());
                }
            }
        }
        return super.toV8Value(v8Values);
    }
}