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Micronaut SourceGen exposes a language-neutral API for source code generation.

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/*
 * Copyright 2017-2024 original 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
 *
 * https://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.micronaut.sourcegen.annotations;

import java.lang.annotation.*;

import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
 * The ToString annotation on a bean should generate a toString method.
 * The method will be created in [BeanName]Object class as a static method:
 *      public static String [BeanName]Object.toString(BeanName object)
 *
 * @author Elif Kurtay
 * @since 1.3
 */

@Retention(RUNTIME)
@Target({ElementType.ANNOTATION_TYPE, ElementType.TYPE})
public @interface ToString {
    /**
     * If present, do not include this field in the generated toString.
     *
     * @author Elif Kurtay
     * @since 1.3
     */
    @Retention(RUNTIME)
    @Target({FIELD, PARAMETER})
    public @interface Exclude {
    }
}