Open source

Prefer the Java standard library instead of Guava

Recipe IDorg.openrewrite.java.migrate.guava.NoGuava

Artifactorg.openrewrite.recipe:rewrite-migrate-java

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.

Composite recipeJavaguavaModerne Source Available License

Try in PlatformTry this recipe in the Moderne platform. Not a user yet? You’ll get a no-setup demo environment, with nothing to install or configure.

Definition

Preconditions1

• Singleton

Recipes51

51 recipes

• Inline guava methods annotated with @InlineMe
• Prefer the Java 11 standard library instead of Guava
• Prefer the Java 21 standard library instead of Guava
• Prefer Files#createTempDirectory()
• Prefer Runnable::run
• Prefer Function.compose(Function)
• Prefer Collection.stream().allMatch(Predicate)
• Prefer Collection.stream().anyMatch(Predicate)
• Prefer Collection.stream().map(Function) over Iterables.transform
• Prefer Collection.stream().map(Function) over Collections2.transform
• Prefer new ArrayList<>()
• Prefer new CopyOnWriteArrayList<>()
• Prefer new LinkedList<>()
• Prefer new LinkedHashMap<>()
• Prefer new TreeMap<>()
• Prefer Predicate.and(Predicate)
• Prefer Predicate.isEqual(Object)
• Prefer A.class::isInstance
• Prefer Arrays.asList(..) over Guava primitives
• Refaster style Guava to Java migration recipes
• Prefer new HashMap<>()
• Prefer Collection.stream().filter(Predicate)
• Prefer new HashSet<>()
• Prefer new ConcurrentHashMap<>()
• Prefer new LinkedHashSet<>()
• Prefer java.nio.charset.StandardCharsets
• Prefer java.util.Optional
• Prefer java.util.function.Function
• Prefer java.util.function.Predicate
• Prefer java.util.function.Supplier
• Prefer java.util.Objects#equals
• Prefer java.util.Objects#hash
• Prefer java.util.Collections#unmodifiableNavigableMap
• Prefer java.util.Collections#synchronizedNavigableMap
• Prefer java.lang.Char#compare
• Prefer Integer#compare
• Prefer Long#compare
• Prefer Short#compare
• Prefer Integer#compareUnsigned
• Prefer Integer#divideUnsigned
• Prefer Integer#parseUnsignedInt
• Prefer String#join() over Guava Joiner#join()
• Prefer Long#compareUnsigned
• Prefer Long#divideUnsigned
• Prefer Long#parseUnsignedInt
• Prefer Long#remainderUnsigned
• Prefer Math#addExact
• Prefer Math#subtractExact
• Prefer Math#multiplyExact
• Prefer new AtomicReference<>()
• InputStreamRules Refaster recipes

Examples

java

java

Before

import com.google.common.primitives.Doubles;

class Test {
    public double testMethod() {
        return Doubles.constrainToRange(20D, 10D, 100D);
    }
}

After

class Test {
    public double testMethod() {
        return Math.clamp(20D, 10D, 100D);
    }
}

Diff

@@ -1,2 +1,0 @@
-import com.google.common.primitives.Doubles;
-
class Test {
@@ -5,1 +3,1 @@
class Test {
    public double testMethod() {
-       return Doubles.constrainToRange(20D, 10D, 100D);
+       return Math.clamp(20D, 10D, 100D);
    }

java

java

Before

import com.google.common.base.Predicate;
import com.google.common.base.Predicates;

class A {
    public static Predicate<String> isHelloPredicate() {
        return Predicates.equalTo("hello");
    }
}

After

import java.util.function.Predicate;

class A {
    public static Predicate<String> isHelloPredicate() {
        return Predicate.<String>isEqual("hello");
    }
}

Diff

@@ -1,2 +1,1 @@
-import com.google.common.base.Predicate;
-import com.google.common.base.Predicates;
+import java.util.function.Predicate;

@@ -6,1 +5,1 @@
class A {
    public static Predicate<String> isHelloPredicate() {
-       return Predicates.equalTo("hello");
+       return Predicate.<String>isEqual("hello");
    }

java

java

Before

import java.util.Set;

import com.google.common.base.Predicate;
import com.google.common.collect.Sets;

class Test {
    public static Set<Object> test(Set<Object> set, Predicate<Object> isNotNull) {
        return Sets.filter(set, isNotNull);
    }
}

After

import java.util.Set;
import java.util.function.Predicate;
import java.util.stream.Collectors;

class Test {
    public static Set<Object> test(Set<Object> set, Predicate<Object> isNotNull) {
        return set.stream().filter(isNotNull).collect(Collectors.toSet());
    }
}

Diff

@@ -2,0 +2,2 @@
import java.util.Set;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;

@@ -3,3 +5,0 @@
import java.util.Set;

-import com.google.common.base.Predicate;
-import com.google.common.collect.Sets;
-
class Test {
@@ -8,1 +7,1 @@
class Test {
    public static Set<Object> test(Set<Object> set, Predicate<Object> isNotNull) {
-       return Sets.filter(set, isNotNull);
+       return set.stream().filter(isNotNull).collect(Collectors.toSet());
    }

java

java

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");
    }
}

Diff

@@ -1,1 +1,1 @@
-import com.google.common.base.MoreObjects;
+import java.util.Objects;

@@ -5,1 +5,1 @@
class A {
    Object foo(Object obj) {
-       return MoreObjects.firstNonNull(obj, "default");
+       return Objects.requireNonNullElse(obj, "default");
    }

java

java

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 "";
        }
    }
}

Diff

@@ -1,1 +1,1 @@
-import com.google.common.base.Optional;
+import java.util.Optional;

@@ -7,1 +7,1 @@
        try {
            return optional.get();
-       } catch (IllegalStateException e) {
+       } catch (NoSuchElementException e) {
            return "";

java

java

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();
    }
}

Diff

@@ -1,1 +1,1 @@
-import com.google.common.base.Optional;
+import java.util.Optional;

@@ -5,1 +5,1 @@
class A {
    Optional<String> foo() {
-       return Optional.absent();
+       return Optional.empty();
    }

java

java

Before

import com.google.common.primitives.Doubles;

class Test {
    public double testMethod() {
        return Doubles.constrainToRange(20D, 10D, 100D);
    }
}

After

class Test {
    public double testMethod() {
        return Math.clamp(20D, 10D, 100D);
    }
}

Diff

@@ -1,2 +1,0 @@
-import com.google.common.primitives.Doubles;
-
class Test {
@@ -5,1 +3,1 @@
class Test {
    public double testMethod() {
-       return Doubles.constrainToRange(20D, 10D, 100D);
+       return Math.clamp(20D, 10D, 100D);
    }

java

java

Before

import com.google.common.base.Predicate;
import com.google.common.base.Predicates;

class A {
    public static Predicate<String> isHelloPredicate() {
        return Predicates.equalTo("hello");
    }
}

After

import java.util.function.Predicate;

class A {
    public static Predicate<String> isHelloPredicate() {
        return Predicate.<String>isEqual("hello");
    }
}

Diff

@@ -1,2 +1,1 @@
-import com.google.common.base.Predicate;
-import com.google.common.base.Predicates;
+import java.util.function.Predicate;

@@ -6,1 +5,1 @@
class A {
    public static Predicate<String> isHelloPredicate() {
-       return Predicates.equalTo("hello");
+       return Predicate.<String>isEqual("hello");
    }

java

java

Before

import java.util.Set;

import com.google.common.base.Predicate;
import com.google.common.collect.Sets;

class Test {
    public static Set<Object> test(Set<Object> set, Predicate<Object> isNotNull) {
        return Sets.filter(set, isNotNull);
    }
}

After

import java.util.Set;
import java.util.function.Predicate;
import java.util.stream.Collectors;

class Test {
    public static Set<Object> test(Set<Object> set, Predicate<Object> isNotNull) {
        return set.stream().filter(isNotNull).collect(Collectors.toSet());
    }
}

Diff

@@ -2,0 +2,2 @@
import java.util.Set;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;

@@ -3,3 +5,0 @@
import java.util.Set;

-import com.google.common.base.Predicate;
-import com.google.common.collect.Sets;
-
class Test {
@@ -8,1 +7,1 @@
class Test {
    public static Set<Object> test(Set<Object> set, Predicate<Object> isNotNull) {
-       return Sets.filter(set, isNotNull);
+       return set.stream().filter(isNotNull).collect(Collectors.toSet());
    }

java

java

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");
    }
}

Diff

@@ -1,1 +1,1 @@
-import com.google.common.base.MoreObjects;
+import java.util.Objects;

@@ -5,1 +5,1 @@
class A {
    Object foo(Object obj) {
-       return MoreObjects.firstNonNull(obj, "default");
+       return Objects.requireNonNullElse(obj, "default");
    }

java

java

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 "";
        }
    }
}

Diff

@@ -1,1 +1,1 @@
-import com.google.common.base.Optional;
+import java.util.Optional;

@@ -7,1 +7,1 @@
        try {
            return optional.get();
-       } catch (IllegalStateException e) {
+       } catch (NoSuchElementException e) {
            return "";

java

java

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();
    }
}

Diff

@@ -1,1 +1,1 @@
-import com.google.common.base.Optional;
+import java.util.Optional;

@@ -5,1 +5,1 @@
class A {
    Optional<String> foo() {
-       return Optional.absent();
+       return Optional.empty();
    }

Usage

Run this recipe

This recipe has no required configuration options. Users of Moderne can run it via the Moderne CLI.

You will need to have configured the Moderne CLI on your machine before you can run the following command.

shell

mod run . --recipe NoGuava

If the recipe is not available locally, then you can install it using:

mod config recipes jar install org.openrewrite.recipe:rewrite-migrate-java:3.38.0

Data tables

Source files that had results

org.openrewrite.table.SourcesFileResults

Source files that were modified by the recipe run.

Column	Description
Source path before the run	The source path of the file before the run. null when a source file was created during the run.
Source path after the run	A 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 changes	In 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 changes	The specific recipe that made a change.
Estimated time saving	An estimated effort that a developer to fix manually instead of using this recipe, in unit of seconds.
Cycle	The recipe cycle in which the change was made.

Source files that had search results

org.openrewrite.table.SearchResults

Search results that were found during the recipe run.

Column	Description
Source path of search result before the run	The source path of the file with the search result markers present.
Source path of search result after run the run	A recipe may modify the source path. This is the path after the run. null when a source file was deleted during the run.
Result	The trimmed printed tree of the LST element that the marker is attached to.
Description	The content of the description of the marker.
Recipe that added the search marker	The specific recipe that added the Search marker.

Source files that errored on a recipe

org.openrewrite.table.SourcesFileErrors

The details of all errors produced by a recipe run.

Column	Description
Source path	The file that failed to parse.
Recipe that made changes	The specific recipe that made a change.
Stack trace	The stack trace of the failure.

Recipe performance

org.openrewrite.table.RecipeRunStats

Statistics used in analyzing the performance of recipes.

Column	Description
The recipe	The recipe whose stats are being measured both individually and cumulatively.
Source file count	The number of source files the recipe ran over.
Source file changed count	The number of source files which were changed in the recipe run. Includes files created, deleted, and edited.
Cumulative scanning time (ns)	The total time spent across the scanning phase of this recipe.
Max scanning time (ns)	The max time scanning any one source file.
Cumulative edit time (ns)	The total time spent across the editing phase of this recipe.
Max edit time (ns)	The max time editing any one source file.