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Prefer the Java standard library instead of Guava

org.openrewrite.java.migrate.guava.NoGuava

Guava filled in important gaps in the Java standard library and still does. But at least some of Guava's API surface area is covered by the Java standard library now, and some projects may be able to remove Guava altogether if they migrate to standard library for these functions.

Tags​

  • guava

Recipe source​

GitHub, Issue Tracker, Maven Central

info

This recipe is composed of more than one recipe. If you want to customize the set of recipes this is composed of, you can find and copy the GitHub source for the recipe from the link above.

This recipe is available under the Moderne Source Available License.

Definition​

Examples​

Example 1​
Before​
import com.google.common.base.MoreObjects;

class A {
    Object foo(Object obj) {
        return MoreObjects.firstNonNull(obj, "default");
    }
}
After​
import java.util.Objects;

class A {
    Object foo(Object obj) {
        return Objects.requireNonNullElse(obj, "default");
    }
}
Example 2​
Before​
import com.google.common.base.Optional;

class A {
    Optional<String> foo() {
        return Optional.absent();
    }
}
After​
import java.util.Optional;

class A {
    Optional<String> foo() {
        return Optional.empty();
    }
}
Example 3​
Before​
import com.google.common.base.Optional;

class A {
    String foo(Optional<String> optional) {
        try {
            return optional.get();
        } catch (IllegalStateException e) {
            return "";
        }
    }
}
After​
import java.util.Optional;

class A {
    String foo(Optional<String> optional) {
        try {
            return optional.get();
        } catch (NoSuchElementException e) {
            return "";
        }
    }
}
Example 4​
Before​
import com.google.common.base.MoreObjects;

class A {
    Object foo(Object obj) {
        return MoreObjects.firstNonNull(obj, "default");
    }
}
After​
import java.util.Objects;

class A {
    Object foo(Object obj) {
        return Objects.requireNonNullElse(obj, "default");
    }
}
Example 5​
Before​
import com.google.common.base.Optional;

class A {
    Optional<String> foo() {
        return Optional.absent();
    }
}
After​
import java.util.Optional;

class A {
    Optional<String> foo() {
        return Optional.empty();
    }
}
Example 6​
Before​
import com.google.common.base.Optional;

class A {
    String foo(Optional<String> optional) {
        try {
            return optional.get();
        } catch (IllegalStateException e) {
            return "";
        }
    }
}
After​
import java.util.Optional;

class A {
    String foo(Optional<String> optional) {
        try {
            return optional.get();
        } catch (NoSuchElementException e) {
            return "";
        }
    }
}

Usage​

This recipe has no required configuration options. It can be activated by adding a dependency on org.openrewrite.recipe:rewrite-migrate-java in your build file or by running a shell command (in which case no build changes are needed):

  1. Add the following to your build.gradle file:
build.gradle
plugins {
    id("org.openrewrite.rewrite") version("7.7.0")
}

rewrite {
    activeRecipe("org.openrewrite.java.migrate.guava.NoGuava")
    setExportDatatables(true)
}

repositories {
    mavenCentral()
}

dependencies {
    rewrite("org.openrewrite.recipe:rewrite-migrate-java:3.11.0")
}
  1. Run gradle rewriteRun to run the recipe.

See how this recipe works across multiple open-source repositories​

Run this recipe on OSS repos at scale with the Moderne SaaS.

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.

Data Tables​

Source files that had results​

org.openrewrite.table.SourcesFileResults

Source files that were modified by the recipe run.

Column NameDescription
Source path before the runThe source path of the file before the run. null when a source file was created during the run.
Source path after the runA recipe may modify the source path. This is the path after the run. null when a source file was deleted during the run.
Parent of the recipe that made changesIn a hierarchical recipe, the parent of the recipe that made a change. Empty if this is the root of a hierarchy or if the recipe is not hierarchical at all.
Recipe that made changesThe specific recipe that made a change.
Estimated time savingAn estimated effort that a developer to fix manually instead of using this recipe, in unit of seconds.
CycleThe recipe cycle in which the change was made.

Contributors​

Jonathan Schneider, Tim te Beek, Laurens Westerlaken, Knut Wannheden, Patrick Way, Sam Snyder, Tyler Van Gorder, Tobias Lidskog, Jonathan Schnéider, Aaron Gershman, Tim te Beek, Aaron Gershman, traceyyoshima, Rick Ossendrijver