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Java client for Appium Mobile Webdriver
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/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.
 * 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 io.appium.java_client.pagefactory.utils;

import io.appium.java_client.proxy.MethodCallListener;
import net.bytebuddy.description.method.MethodDescription;
import net.bytebuddy.matcher.ElementMatcher;

import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import static io.appium.java_client.proxy.Helpers.OBJECT_METHOD_NAMES;
import static io.appium.java_client.proxy.Helpers.createProxy;
import static net.bytebuddy.matcher.ElementMatchers.isAbstract;
import static net.bytebuddy.matcher.ElementMatchers.namedOneOf;
import static net.bytebuddy.matcher.ElementMatchers.not;

/**
 * Original class is a super class of a
 * proxy object here.
 */
public final class ProxyFactory {
    private static final Set NON_PROXYABLE_METHODS = setWithout(
            OBJECT_METHOD_NAMES, "toString", "equals", "hashCode"
    );

    @SafeVarargs
    private static  Set setWithout(@SuppressWarnings("SameParameterValue") Set source, T... items) {
        Set result = new HashSet<>(source);
        Arrays.asList(items).forEach(result::remove);
        return Collections.unmodifiableSet(result);
    }

    @SafeVarargs
    private static  Set setWith(@SuppressWarnings("SameParameterValue") Set source, T... items) {
        Set result = new HashSet<>(source);
        result.addAll(List.of(items));
        return Collections.unmodifiableSet(result);
    }

    private ProxyFactory() {
    }

    /**
     * Creates a proxy instance for the given class with an empty constructor.
     *
     * @param  The proxy object class.
     * @param requiredClazz is a {@link java.lang.Class} whose instance should be created
     * @param listener is the instance of a method listener class
     * @return a proxied instance of the desired class
     */
    public static  T getEnhancedProxy(Class requiredClazz, MethodCallListener listener) {
        return getEnhancedProxy(requiredClazz, new Class[] {}, new Object[] {}, listener);
    }

    /**
     * Creates a proxy instance for the given class.
     *
     * @param  The proxy object class.
     * @param cls is a {@link java.lang.Class} whose instance should be created
     * @param params is an array of @link java.lang.Class}. It should be convenient to
     *               parameter types of some declared constructor which belongs to desired
     *               class.
     * @param values is an array of @link java.lang.Object}. It should be convenient to
     *               parameter types of some declared constructor which belongs to desired
     *               class.
     * @param listener is the instance of a method listener class
     * @return a proxied instance of the desired class
     */
    public static  T getEnhancedProxy(
            Class cls, Class[] params, Object[] values, MethodCallListener listener
    ) {
        ElementMatcher extraMatcher = not(
                namedOneOf(NON_PROXYABLE_METHODS.toArray(new String[0]))
        ).and(
                not(isAbstract())
        );
        return createProxy(
                cls,
                values,
                params,
                Collections.singletonList(listener),
                extraMatcher
        );
    }
}