AdderMethodReference.java

/*
 * Copyright 2023 Terminal Utils Authors
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.morimekta.terminal.args.reference;

import java.lang.annotation.Annotation;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.Collection;

/**
 * Adder reference backed by an add method (e.g. {@code addFoo(value)}) on
 * the config object.
 */
public class AdderMethodReference extends MethodReference implements AdderReference {
    private final Method adder;

    public AdderMethodReference(
            Object instance,
            Method getter,
            Method adder,
            AccessibleObject annotationRef) {
        super(instance, getter, annotationRef);
        this.adder = adder;
    }

    @Override
    public Class<?> getItemType() {
        return adder.getParameterTypes()[0];
    }

    @Override
    public String getName() {
        return adder.getName();
    }

    @Override
    public void add(Object o) {
        safeInvoke(adder, instance, o);
    }

    @Override
    public boolean isAnnotationPresent(Class<? extends Annotation> annotation) {
        return adder.isAnnotationPresent(annotation) || super.isAnnotationPresent(annotation);
    }

    @Override
    public <A extends Annotation> A getAnnotation(Class<A> annotation) {
        if (adder.isAnnotationPresent(annotation)) {
            return adder.getAnnotation(annotation);
        }
        return super.getAnnotation(annotation);
    }

    @Override
    public Class<?> getType() {
        if (getter != null) {
            return getter.getReturnType();
        }
        return Collection.class;
    }

    @Override
    public Type getGenericType() {
        if (getter != null) {
            return getter.getGenericReturnType();
        }
        return new ReferenceParameterizedType(getType(), getItemType());
    }

}