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The Adobe Experience Manager SDK
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/*
 * Copyright (C) 2012 The Guava Authors
 *
 * 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.google.common.reflect;

import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.annotations.Beta;
import com.google.common.collect.ImmutableList;
import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import javax.annotation.Nullable;

/**
 *  Represents a method or constructor parameter.
 *
 *  @author Ben Yu
 *  @since 14.0
 *
 * @deprecated The Google Guava Core Libraries are deprecated and will not be part of the AEM SDK after April 2023
 */
@Beta
@Deprecated(since = "2022-12-01")
public final class Parameter implements AnnotatedElement {

    private final Invokable declaration;

    private final int position;

    private final TypeToken type;

    private final ImmutableList annotations;

    Parameter(Invokable declaration, int position, TypeToken type, Annotation[] annotations) {
        this.declaration = declaration;
        this.position = position;
        this.type = type;
        this.annotations = ImmutableList.copyOf(annotations);
    }

    /**
     * Returns the type of the parameter.
     */
    public TypeToken getType() {
        return type;
    }

    /**
     * Returns the {@link Invokable} that declares this parameter.
     */
    public Invokable getDeclaringInvokable() {
        return declaration;
    }

    @Override
    public boolean isAnnotationPresent(Class annotationType) {
        return getAnnotation(annotationType) != null;
    }

    @Override
    @Nullable
    public  A getAnnotation(Class annotationType) {
        checkNotNull(annotationType);
        for (Annotation annotation : annotations) {
            if (annotationType.isInstance(annotation)) {
                return annotationType.cast(annotation);
            }
        }
        return null;
    }

    @Override
    public Annotation[] getAnnotations() {
        return getDeclaredAnnotations();
    }

    @Override
    public Annotation[] getDeclaredAnnotations() {
        return annotations.toArray(new Annotation[annotations.size()]);
    }

    @Override
    public boolean equals(@Nullable Object obj) {
        if (obj instanceof Parameter) {
            Parameter that = (Parameter) obj;
            return position == that.position && declaration.equals(that.declaration);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return position;
    }

    @Override
    public String toString() {
        return type + " arg" + position;
    }
}