/*
 * Copyright (C) 2010-2017 The Project Lombok Authors.
 * 
 * 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 a no-args constructor. Will generate an error message if such a constructor cannot be written due to the existence of final fields.

Complete documentation is found at the project lombok features page for @Constructor.

Even though it is not listed, this annotation also has the onConstructor parameter. See the full documentation for more details.

NB: Fields with constraints such as @NonNull will NOT be checked in a @NoArgsConstructor constructor, of course!

See Also:
/** * Generates a no-args constructor. * Will generate an error message if such a constructor cannot be written due to the existence of final fields. * <p> * Complete documentation is found at <a href="https://projectlombok.org/features/Constructor">the project lombok features page for &#64;Constructor</a>. * <p> * Even though it is not listed, this annotation also has the {@code onConstructor} parameter. See the full documentation for more details. * <p> * NB: Fields with constraints such as {@code @NonNull} will <em>NOT</em> be checked in a {@code @NoArgsConstructor} constructor, of course! * * @see RequiredArgsConstructor * @see AllArgsConstructor */
@Target(ElementType.TYPE) @Retention(RetentionPolicy.SOURCE) public @interface NoArgsConstructor {
If set, the generated constructor will be private, and an additional static 'constructor' is generated with the same argument list that wraps the real constructor. Such a static 'constructor' is primarily useful as it infers type arguments.
Returns:Name of static 'constructor' method to generate (blank = generate a normal constructor).
/** * If set, the generated constructor will be private, and an additional static 'constructor' * is generated with the same argument list that wraps the real constructor. * * Such a static 'constructor' is primarily useful as it infers type arguments. * * @return Name of static 'constructor' method to generate (blank = generate a normal constructor). */
String staticName() default "";
Any annotations listed here are put on the generated constructor. The syntax for this feature depends on JDK version (nothing we can do about that; it's to work around javac bugs).
up to JDK7:
@NoArgsConstructor(onConstructor=@__({@AnnotationsGoHere}))
from JDK8:
@NoArgsConstructor(onConstructor_={@AnnotationsGohere}) // note the underscore after onConstructor.
Returns:List of annotations to apply to the generated constructor.
/** * Any annotations listed here are put on the generated constructor. * The syntax for this feature depends on JDK version (nothing we can do about that; it's to work around javac bugs).<br> * up to JDK7:<br> * {@code @NoArgsConstructor(onConstructor=@__({@AnnotationsGoHere}))}<br> * from JDK8:<br> * {@code @NoArgsConstructor(onConstructor_={@AnnotationsGohere})} // note the underscore after {@code onConstructor}. * * @return List of annotations to apply to the generated constructor. */
AnyAnnotation[] onConstructor() default {};
Sets the access level of the constructor. By default, generated constructors are public.
Returns:The constructor will be generated with this access modifier.
/** * Sets the access level of the constructor. By default, generated constructors are {@code public}. * * @return The constructor will be generated with this access modifier. */
AccessLevel access() default lombok.AccessLevel.PUBLIC;
If true, initializes all final fields to 0 / null / false. Otherwise, a compile time error occurs.
Returns:Return true to force generation of a no-args constructor, picking defaults if necessary to assign required fields.
/** * If {@code true}, initializes all final fields to 0 / null / false. * Otherwise, a compile time error occurs. * * @return Return {@code} true to force generation of a no-args constructor, picking defaults if necessary to assign required fields. */
boolean force() default false;
Placeholder annotation to enable the placement of annotations on the generated code.
Deprecated:Don't use this annotation, ever - Read the documentation.
/** * Placeholder annotation to enable the placement of annotations on the generated code. * @deprecated Don't use this annotation, ever - Read the documentation. */
@Deprecated @Retention(RetentionPolicy.SOURCE) @Target({}) @interface AnyAnnotation {} }