diff options
Diffstat (limited to 'src/core/lombok/ToString.java')
-rw-r--r-- | src/core/lombok/ToString.java | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/core/lombok/ToString.java b/src/core/lombok/ToString.java new file mode 100644 index 00000000..7b89d481 --- /dev/null +++ b/src/core/lombok/ToString.java @@ -0,0 +1,81 @@ +/* + * 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; +} |