nodoublebraceinitialization.md

No double brace initialization

org.openrewrite.staticanalysis.NoDoubleBraceInitialization

Replace List, Map, and Set double brace initialization with an initialization block.

Tags

• RSPEC-1171
• RSPEC-3599

Source

GitHub, Issue Tracker, Maven Central

• groupId: org.openrewrite.recipe
• artifactId: rewrite-static-analysis
• version: 1.0.1

Example

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

Before

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

import java.util.Set;
import java.util.LinkedHashSet;
class A {
    void a() {
        Integer CNT = 10;
        final Set<Integer> keys = new LinkedHashSet<>(){{
            for (int i = 0; i < CNT; i++) {
                add(i);
            }
        }};
    }
}

{% endcode %}

After

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

import java.util.Set;
import java.util.LinkedHashSet;
class A {
    void a() {
        Integer CNT = 10;
        final Set<Integer> keys = new LinkedHashSet<>();
        for (int i = 0; i < CNT; i++) {
            keys.add(i);
        }
    }
}

{% endcode %}

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

--- A.java
+++ A.java
@@ -6,5 +6,4 @@
    void a() {
        Integer CNT = 10;
-       final Set<Integer> keys = new LinkedHashSet<>(){{
-           for (int i = 0; i < CNT; i++) {
-               add(i);
-           }
-       }};
+       final Set<Integer> keys = new LinkedHashSet<>();
+       for (int i = 0; i < CNT; i++) {
+           keys.add(i);
+       }
    }

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

Usage

This recipe has no required configuration options. It can be activated by adding a dependency on org.openrewrite.recipe:rewrite-static-analysis:1.0.1 in your build file or by running a shell command (in which case no build changes are needed): {% tabs %} {% tab title="Gradle" %} {% code title="build.gradle" %}

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

rewrite {
    activeRecipe("org.openrewrite.staticanalysis.NoDoubleBraceInitialization")
}

repositories {
    mavenCentral()
}

dependencies {
    rewrite("org.openrewrite.recipe:rewrite-static-analysis:1.0.1")
}

{% 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.staticanalysis.NoDoubleBraceInitialization</recipe>
          </activeRecipes>
        </configuration>
        <dependencies>
          <dependency>
            <groupId>org.openrewrite.recipe</groupId>
            <artifactId>rewrite-static-analysis</artifactId>
            <version>1.0.1</version>
          </dependency>
        </dependencies>
      </plugin>
    </plugins>
  </build>
</project>

{% endcode %} {% endtab %}

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

mvn -U org.openrewrite.maven:rewrite-maven-plugin:run \
  -Drewrite.recipeArtifactCoordinates=org.openrewrite.recipe:rewrite-static-analysis:RELEASE \
  -Drewrite.activeRecipes=org.openrewrite.staticanalysis.NoDoubleBraceInitialization

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

Contributors

• Patrick Way
• Patrick
• Kun Li
• Knut Wannheden
• Sam Snyder
• Nick McKinney
• Tyler Van Gorder

See how this recipe works across multiple open-source repositories

The community edition of the Moderne platform enables you to easily run recipes across thousands of open-source repositories.

Please contact Moderne for more information about safely running the recipes on your own codebase in a private SaaS.