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Diffstat (limited to 'src/core/lombok/experimental/Value.java')
-rw-r--r-- | src/core/lombok/experimental/Value.java | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/core/lombok/experimental/Value.java b/src/core/lombok/experimental/Value.java new file mode 100644 index 00000000..f8bd06b2 --- /dev/null +++ b/src/core/lombok/experimental/Value.java @@ -0,0 +1,69 @@ +/* + * Copyright (C) 2012 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.experimental; + +import java.lang.annotation.ElementType; +import java.lang.annotation.Retention; +import java.lang.annotation.RetentionPolicy; +import java.lang.annotation.Target; + +/** + * Generates a lot of code which fits with a class that is a representation of an immutable entity. + * Specifically, it generates:<ul> + * <li>Getters for all fields + * <li>toString method + * <li>hashCode and equals implementations that check all non-transient fields. + * <li>Generates withers for all fields (except final fields that are initialized in the field declaration itself) + * <li>Generates a constructor for each argument + * <li>Adds {@code private} and {@code final} to each field. + * </ul> + * + * In other words, {@code @Value} is a shorthand for {@code @Getter @Wither @FieldDefaults(makeFinal=true,level=AccessLevel.PRIVATE) @EqualsAndHashCode @ToString @AllArgsConstructor}. + * <p> + * If any method to be generated already exists (in name - the return type or parameters are not relevant), then + * that method will not be generated by the Data annotation. + * <p> + * The generated constructor will have 1 parameter for each field. The generated toString will print all fields, + * while the generated hashCode and equals take into account all non-transient fields.<br> + * Static fields are skipped (no getter or setter, and they are not included in toString, equals, hashCode, or the constructor). + * <p> + * {@code toString}, {@code equals}, and {@code hashCode} use the deepX variants in the + * {@code java.util.Arrays} utility class. Therefore, if your class has arrays that contain themselves, + * these methods will just loop endlessly until the inevitable {@code StackOverflowError}. This behaviour + * is no different from {@code java.util.ArrayList}, though. + */ +@Target(ElementType.TYPE) +@Retention(RetentionPolicy.SOURCE) +public @interface Value { + /** + * If you specify a static constructor name, then the generated constructor will be private, and + * instead a static factory method is created that other classes can use to create instances. + * We suggest the name: "of", like so: + * + * <pre> + * public @Data(staticConstructor = "of") class Point { final int x, y; } + * </pre> + * + * Default: No static constructor, instead the normal constructor is public. + */ + String staticConstructor() default ""; +} |