Moderne licensed

Modernize collections

Recipe IDorg.openrewrite.staticanalysis.ModernizeCollections

Artifactorg.openrewrite.recipe:rewrite-static-analysis

Replace the legacy synchronized types Hashtable, Vector, Stack, and StringBuffer with their modern unsynchronized counterparts HashMap, ArrayList, Deque/ArrayDeque, and StringBuilder. Each replacement is only applied when data flow analysis can prove the instance is a local variable that never escapes its method, so the synchronization it provided is redundant.

Composite recipeRSPEC-S1149MSAL

Usage

This recipe has no required configuration options. You’ll need the Moderne CLI configured before running the command below.

mod run . --recipe org.openrewrite.staticanalysis.ModernizeCollections

If the recipe isn’t available locally, install it with:

mod config recipes jar install org.openrewrite.recipe:rewrite-static-analysis:2.40.0

Definition

This recipe runs the following recipes in order.

Replace java.util.Hashtable with java.util.HashMaporg.openrewrite.staticanalysis.ReplaceHashtableWithHashMap
Replace java.util.Vector with java.util.ArrayListorg.openrewrite.staticanalysis.ReplaceVectorWithArrayList
Replace java.util.Stack with java.util.Dequeorg.openrewrite.staticanalysis.ReplaceStackWithDeque
Replace java.lang.StringBuffer with java.lang.StringBuilderorg.openrewrite.staticanalysis.ReplaceStringBufferWithStringBuilder

Data tables

Structured output this recipe can produce.

Legacy synchronized types not migratedInstances of a legacy synchronized type (`Hashtable`, `Vector`, `Stack`, `StringBuffer`) that were found but left unchanged because they could not be proven safe to modernize.org.openrewrite.staticanalysis.table.LegacySynchronizedTypesNotMigrated
Source files that had resultsSource files that were modified by the recipe run.org.openrewrite.table.SourcesFileResults
Source files that had search resultsSearch results that were found during the recipe run.org.openrewrite.table.SearchResults
Source files that errored on a recipeThe details of all errors produced by a recipe run.org.openrewrite.table.SourcesFileErrors
Recipe performanceStatistics used in analyzing the performance of recipes.org.openrewrite.table.RecipeRunStats