/*
 * Copyright 2014 - 2019 Rafael Winterhalter
 *
 * 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 net.bytebuddy.dynamic.scaffold.inline;

import net.bytebuddy.build.HashCodeAndEqualsPlugin;
import net.bytebuddy.description.method.MethodDescription;
import net.bytebuddy.description.type.TypeDescription;
import net.bytebuddy.matcher.ElementMatcher;
import net.bytebuddy.matcher.ElementMatchers;
import net.bytebuddy.matcher.LatentMatcher;

import static net.bytebuddy.matcher.ElementMatchers.*;

A latent method matcher that identifies methods to instrument when redefining or rebasing a type.
/**
 * A latent method matcher that identifies methods to instrument when redefining or rebasing a type.
 */
@HashCodeAndEqualsPlugin.Enhance
public class InliningImplementationMatcher implements LatentMatcher<MethodDescription> {

    
A method matcher that matches any ignored method.
/**
     * A method matcher that matches any ignored method.
     */
    private final LatentMatcher<? super MethodDescription> ignoredMethods;

    
A method matcher that matches any predefined method.
/**
     * A method matcher that matches any predefined method.
     */
    private final ElementMatcher<? super MethodDescription> predefinedMethodSignatures;

    
Creates a new inline implementation matcher.
Params:
ignoredMethods –             A method matcher that matches any ignored method.
predefinedMethodSignatures – A method matcher that matches any predefined method./**
     * Creates a new inline implementation matcher.
     *
     * @param ignoredMethods             A method matcher that matches any ignored method.
     * @param predefinedMethodSignatures A method matcher that matches any predefined method.
     */
    protected InliningImplementationMatcher(LatentMatcher<? super MethodDescription> ignoredMethods,
                                            ElementMatcher<? super MethodDescription> predefinedMethodSignatures) {
        this.ignoredMethods = ignoredMethods;
        this.predefinedMethodSignatures = predefinedMethodSignatures;
    }

    
Creates a matcher where only overridable or declared methods are matched unless those are ignored. Methods that
are declared by the target type are only matched if they are not ignored. Declared methods that are not found on the
target type are always matched.
Params:
ignoredMethods – A method matcher that matches any ignored method.
originalType –   The original type of the instrumentation before adding any user methods.
Returns:
A latent method matcher that identifies any method to instrument for a rebasement or redefinition./**
     * Creates a matcher where only overridable or declared methods are matched unless those are ignored. Methods that
     * are declared by the target type are only matched if they are not ignored. Declared methods that are not found on the
     * target type are always matched.
     *
     * @param ignoredMethods A method matcher that matches any ignored method.
     * @param originalType   The original type of the instrumentation before adding any user methods.
     * @return A latent method matcher that identifies any method to instrument for a rebasement or redefinition.
     */
    protected static LatentMatcher<MethodDescription> of(LatentMatcher<? super MethodDescription> ignoredMethods, TypeDescription originalType) {
        ElementMatcher.Junction<MethodDescription> predefinedMethodSignatures = none();
        for (MethodDescription methodDescription : originalType.getDeclaredMethods()) {
            ElementMatcher.Junction<MethodDescription> signature = methodDescription.isConstructor()
                    ? isConstructor()
                    : ElementMatchers.<MethodDescription>named(methodDescription.getName());
            signature = signature.and(returns(methodDescription.getReturnType().asErasure()));
            signature = signature.and(takesArguments(methodDescription.getParameters().asTypeList().asErasures()));
            predefinedMethodSignatures = predefinedMethodSignatures.or(signature);
        }
        return new InliningImplementationMatcher(ignoredMethods, predefinedMethodSignatures);
    }

    
{@inheritDoc}
/**
     * {@inheritDoc}
     */
    public ElementMatcher<? super MethodDescription> resolve(TypeDescription typeDescription) {
        return (ElementMatcher<? super MethodDescription>) not(ignoredMethods.resolve(typeDescription))
                .and(isVirtual().and(not(isFinal())).or(isDeclaredBy(typeDescription)))
                .or(isDeclaredBy(typeDescription).and(not(predefinedMethodSignatures)));
    }
}