findrepeatableannotations.md

Find uses of @Repeatable annotations

org.openrewrite.java.search.FindRepeatableAnnotations

Java 8 introduced the concept of @Repeatable annotations.

Source

GitHub, Issue Tracker, Maven Central

• groupId: org.openrewrite
• artifactId: rewrite-java
• version: 8.1.3

Example

{% tabs %} {% tab title="Test.java" %}

Before

{% code title="Test.java" %}

import org.mapstruct.*;
class Test {
    @ValueMappings({
            @ValueMapping(source = "UNKNOWN", target = MappingConstants.NULL),
            @ValueMapping(source = "UNRECOGNIZED", target = MappingConstants.NULL)
    })
    void test() {
    }
}

{% endcode %}

After

{% code title="Test.java" %}

import org.mapstruct.*;
class Test {
    @ValueMappings({
            /*~~>*/@ValueMapping(source = "UNKNOWN", target = MappingConstants.NULL),
            /*~~>*/@ValueMapping(source = "UNRECOGNIZED", target = MappingConstants.NULL)
    })
    void test() {
    }
}

{% endcode %}

{% endtab %} {% tab title="Diff" %} {% code %}

--- Test.java
+++ Test.java
@@ -4,2 +4,2 @@
class Test {
    @ValueMappings({
-           @ValueMapping(source = "UNKNOWN", target = MappingConstants.NULL),
-           @ValueMapping(source = "UNRECOGNIZED", target = MappingConstants.NULL)
+           /*~~>*/@ValueMapping(source = "UNKNOWN", target = MappingConstants.NULL),
+           /*~~>*/@ValueMapping(source = "UNRECOGNIZED", target = MappingConstants.NULL)
    })

{% endcode %} {% endtab %} {% endtabs %}

Unchanged

{% code title="org/mapstruct/ValueMapping.java" %}

package org.mapstruct;

import java.lang.annotation.ElementType;
import java.lang.annotation.Repeatable;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Repeatable(ValueMappings.class)
@Retention(RetentionPolicy.CLASS)
@Target(ElementType.METHOD)
public @interface ValueMapping {
    String source();

    String target();
}

{% endcode %}

Unchanged

{% code title="org/mapstruct/ValueMappings.java" %}

package org.mapstruct;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target({ElementType.METHOD})
@Retention(RetentionPolicy.CLASS)
public @interface ValueMappings {
    ValueMapping[] value();
}

{% endcode %}

Usage

This recipe has no required configuration parameters and comes from a rewrite core library. It can be activated directly without adding any dependencies. {% tabs %} {% tab title="Gradle" %} {% code title="build.gradle" %}

plugins {
    id("org.openrewrite.rewrite") version("6.1.4")
}

rewrite {
    activeRecipe("org.openrewrite.java.search.FindRepeatableAnnotations")
}

repositories {
    mavenCentral()
}

{% endcode %} {% endtab %} {% tab title="Maven POM" %} {% code title="pom.xml" %}

<project>
  <build>
    <plugins>
      <plugin>
        <groupId>org.openrewrite.maven</groupId>
        <artifactId>rewrite-maven-plugin</artifactId>
        <version>5.2.4</version>
        <configuration>
          <activeRecipes>
            <recipe>org.openrewrite.java.search.FindRepeatableAnnotations</recipe>
          </activeRecipes>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

{% endcode %} {% endtab %}

{% tab title="Maven Command Line" %} You will need to have Maven installed on your machine before you can run the following command. {% code title="shell" %}

mvn -U org.openrewrite.maven:rewrite-maven-plugin:run \
  -Drewrite.activeRecipes=org.openrewrite.java.search.FindRepeatableAnnotations

{% endcode %} {% endtab %} {% endtabs %}

Contributors

• Jonathan Schneider
• Patrick

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