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/*
* Copyright © 2009 Reinier Zwitserloot and Roel Spilker.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package lombok;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* Generates an implementation for the {@code toString} method inherited by all objects.
* <p>
* If the method already exists, then {@code ToString} will not generate any method, and instead warns
* that it's doing nothing at all. The parameter list and return type are not relevant when deciding to skip generation of
* the method; any method named {@code toString} will make {@code ToString} not generate anything.
* <p>
* By default, all fields that are non-static are used in the toString generation. You can exclude fields by specifying them
* in the {@code exclude} parameter. You can also explicitly specify the fields that
* are to be used by specifying them in the {@code of} parameter.
* <p>
* Array fields are handled by way of {@link java.util.Arrays#deepToString(Object[])} where necessary.
* The downside is that arrays with circular references (arrays that contain themselves,
* possibly indirectly) results in calls to {@code toString} throwing a
* {@link java.lang.StackOverflowError}. However, the implementations for java's own {@link java.util.ArrayList} suffer
* from the same flaw.
* <p>
* The {@code toString} method that is generated will print the class name as well as each field (both the name
* and the value). You can optionally choose to suppress the printing of the field name, by setting the
* {@code includeFieldNames} flag to <em>false</em>.
* <p>
* You can also choose to include the result of {@code toString} in your class's superclass by setting the
* {@code callSuper} to <em>true</em>.
*/
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.SOURCE)
public @interface ToString {
/**
* Include the name of each field when printing it.
* <strong>default: true</strong>
*/
boolean includeFieldNames() default true;
/**
* Any fields listed here will not be printed in the generated {@code toString} implementation.
* Mutually exclusive with {@link #of()}.
*/
String[] exclude() default {};
/**
* If present, explicitly lists the fields that are to be printed.
* Normally, all non-static fields are printed.
* <p>
* Mutually exclusive with {@link #exclude()}.
*/
String[] of() default {};
/**
* Include the result of the superclass's implementation of {@code toString} in the output.
* <strong>default: false</strong>
*/
boolean callSuper() default false;
}
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