use Apache Commons StringUtil

pom.xml

@@ -220,6 +220,11 @@ under the License.
       <artifactId>commons-collections4</artifactId>
       <version>4.2</version>
     </dependency>
+    <dependency>
+      <groupId>org.apache.commons</groupId>
+      <artifactId>commons-lang3</artifactId>
+      <version>3.12.0</version>
+    </dependency>
 
     <!-- dependencies to annotations -->
     <dependency>

src/main/java/org/apache/maven/plugins/dependency/AbstractDependencyMojo.java

@@ -22,6 +22,7 @@
 import java.io.IOException;
 import java.lang.reflect.Field;
 import java.util.List;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.artifact.repository.ArtifactRepository;
 import org.apache.maven.execution.MavenSession;
@@ -43,7 +44,6 @@
 import org.codehaus.plexus.components.io.fileselectors.IncludeExcludeFileSelector;
 import org.codehaus.plexus.util.FileUtils;
 import org.codehaus.plexus.util.ReflectionUtils;
-import org.codehaus.plexus.util.StringUtils;
 import org.sonatype.plexus.build.incremental.BuildContext;
 
 /**

src/main/java/org/apache/maven/plugins/dependency/GetMojo.java

@@ -23,6 +23,7 @@
 import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.handler.ArtifactHandler;
 import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
 import org.apache.maven.artifact.repository.ArtifactRepository;
@@ -48,7 +49,6 @@
 import org.apache.maven.shared.transfer.dependencies.DependableCoordinate;
 import org.apache.maven.shared.transfer.dependencies.resolve.DependencyResolver;
 import org.apache.maven.shared.transfer.dependencies.resolve.DependencyResolverException;
-import org.codehaus.plexus.util.StringUtils;
 
 /**
  * Resolves a single artifact, eventually transitively, from the specified remote repositories. Caveat: will always

src/main/java/org/apache/maven/plugins/dependency/PurgeLocalRepositoryMojo.java

@@ -26,6 +26,7 @@
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.artifact.ArtifactUtils;
 import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
@@ -61,7 +62,6 @@
 import org.apache.maven.shared.utils.logging.MessageBuilder;
 import org.apache.maven.shared.utils.logging.MessageUtils;
 import org.codehaus.plexus.util.FileUtils;
-import org.codehaus.plexus.util.StringUtils;
 
 /**
  * When run on a project, remove the project dependencies from the local repository, and optionally re-resolve them.

src/main/java/org/apache/maven/plugins/dependency/analyze/AnalyzeDepMgt.java

@@ -25,6 +25,7 @@
 import java.util.Map;
 import java.util.Set;
 import java.util.stream.Collectors;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.model.Dependency;
 import org.apache.maven.model.DependencyManagement;
@@ -36,7 +37,6 @@
 import org.apache.maven.plugins.annotations.Parameter;
 import org.apache.maven.plugins.annotations.ResolutionScope;
 import org.apache.maven.project.MavenProject;
-import org.codehaus.plexus.util.StringUtils;
 
 /**
  * This mojo looks at the dependencies after final resolution and looks for mismatches in your dependencyManagement

src/main/java/org/apache/maven/plugins/dependency/fromConfiguration/AbstractFromConfigurationMojo.java

@@ -22,6 +22,7 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.artifact.handler.ArtifactHandler;
 import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
@@ -40,7 +41,6 @@
 import org.apache.maven.shared.transfer.artifact.resolve.ArtifactResolver;
 import org.apache.maven.shared.transfer.artifact.resolve.ArtifactResolverException;
 import org.apache.maven.shared.transfer.repository.RepositoryManager;
-import org.codehaus.plexus.util.StringUtils;
 
 /**
  * Abstract parent class used by mojos that get Artifact information from the plugin configuration as an ArrayList of

src/main/java/org/apache/maven/plugins/dependency/fromConfiguration/UnpackMojo.java

@@ -20,6 +20,7 @@
 
 import java.io.File;
 import java.util.List;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.plugin.MojoExecutionException;
 import org.apache.maven.plugin.MojoFailureException;
 import org.apache.maven.plugins.annotations.LifecyclePhase;
@@ -30,7 +31,6 @@
 import org.apache.maven.plugins.dependency.utils.markers.MarkerHandler;
 import org.apache.maven.plugins.dependency.utils.markers.UnpackFileMarkerHandler;
 import org.codehaus.plexus.components.io.filemappers.FileMapper;
-import org.codehaus.plexus.util.StringUtils;
 
 /**
  * Goal that retrieves a list of artifacts from the repository and unpacks them in a defined location.

src/main/java/org/apache/maven/plugins/dependency/fromDependencies/AbstractDependencyFilterMojo.java

@@ -23,6 +23,7 @@
 import java.util.Collection;
 import java.util.LinkedHashSet;
 import java.util.Set;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
 import org.apache.maven.plugin.MojoExecutionException;
@@ -51,7 +52,6 @@
 import org.apache.maven.shared.transfer.artifact.resolve.ArtifactResolverException;
 import org.apache.maven.shared.transfer.dependencies.resolve.DependencyResolver;
 import org.apache.maven.shared.transfer.repository.RepositoryManager;
-import org.codehaus.plexus.util.StringUtils;
 
 /**
  * Class that encapsulates the plugin parameters, and contains methods that handle dependency filtering

src/main/java/org/apache/maven/plugins/dependency/fromDependencies/BuildClasspathMojo.java

@@ -35,6 +35,7 @@
 import java.util.Set;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.plugin.MojoExecutionException;
 import org.apache.maven.plugins.annotations.Component;
@@ -47,7 +48,6 @@
 import org.apache.maven.project.ProjectBuildingRequest;
 import org.apache.maven.shared.artifact.filter.collection.ArtifactsFilter;
 import org.apache.maven.shared.transfer.repository.RepositoryManager;
-import org.codehaus.plexus.util.StringUtils;
 
 /**
  * This goal outputs a classpath string of dependencies from the local repository to a file or log.

src/main/java/org/apache/maven/plugins/dependency/utils/DependencyUtil.java

@@ -26,10 +26,10 @@
 import java.io.StringReader;
 import java.io.Writer;
 import java.util.Objects;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.artifact.ArtifactUtils;
 import org.apache.maven.plugin.logging.Log;
-import org.codehaus.plexus.util.StringUtils;
 
 /**
  * Utility class with static helper methods.

src/main/java/org/apache/maven/plugins/dependency/utils/filters/DestFileFilter.java

@@ -23,12 +23,12 @@
 import java.nio.file.Files;
 import java.util.LinkedHashSet;
 import java.util.Set;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.plugins.dependency.fromConfiguration.ArtifactItem;
 import org.apache.maven.plugins.dependency.utils.DependencyUtil;
 import org.apache.maven.shared.artifact.filter.collection.AbstractArtifactsFilter;
 import org.apache.maven.shared.artifact.filter.collection.ArtifactFilterException;
-import org.codehaus.plexus.util.StringUtils;
 
 /**
  * @author <a href="mailto:brianf@apache.org">Brian Fox</a>

src/main/java/org/apache/maven/plugins/dependency/utils/markers/UnpackFileMarkerHandler.java

@@ -19,8 +19,8 @@
 package org.apache.maven.plugins.dependency.utils.markers;
 
 import java.io.File;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.plugins.dependency.fromConfiguration.ArtifactItem;
-import org.codehaus.plexus.util.StringUtils;
 
 /**
  * @author <a href="mailto:dbradicich@comcast.net">Damian Bradicich</a>

src/main/java/org/apache/maven/plugins/dependency/utils/translators/ClassifierTypeTranslator.java

@@ -20,13 +20,13 @@
 
 import java.util.LinkedHashSet;
 import java.util.Set;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.artifact.handler.ArtifactHandler;
 import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
 import org.apache.maven.plugin.logging.Log;
 import org.apache.maven.shared.transfer.artifact.ArtifactCoordinate;
 import org.apache.maven.shared.transfer.artifact.DefaultArtifactCoordinate;
-import org.codehaus.plexus.util.StringUtils;
 
 /**
  * @author <a href="mailto:brianf@apache.org">Brian Fox</a>

src/test/java/org/apache/maven/plugins/dependency/fromDependencies/TestCopyDependenciesMojo.java

@@ -22,6 +22,7 @@
 import java.io.IOException;
 import java.util.HashSet;
 import java.util.Set;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
 import org.apache.maven.artifact.resolver.filter.ScopeArtifactFilter;
@@ -33,7 +34,6 @@
 import org.apache.maven.plugins.dependency.utils.DependencyUtil;
 import org.apache.maven.plugins.dependency.utils.markers.DefaultFileMarkerHandler;
 import org.apache.maven.project.MavenProject;
-import org.codehaus.plexus.util.StringUtils;
 
 public class TestCopyDependenciesMojo extends AbstractDependencyMojoTestCase {
 

src/test/java/org/apache/maven/plugins/dependency/fromDependencies/TestCopyDependenciesMojo2.java

@@ -26,6 +26,7 @@
 import java.util.Collection;
 import java.util.HashSet;
 import java.util.Set;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.artifact.factory.ArtifactFactory;
 import org.apache.maven.artifact.metadata.ArtifactMetadata;
@@ -44,7 +45,6 @@
 import org.apache.maven.plugins.dependency.AbstractDependencyMojoTestCase;
 import org.apache.maven.plugins.dependency.utils.DependencyUtil;
 import org.apache.maven.project.MavenProject;
-import org.codehaus.plexus.util.StringUtils;
 
 public class TestCopyDependenciesMojo2 extends AbstractDependencyMojoTestCase {
 

src/test/java/org/apache/maven/plugins/dependency/fromDependencies/TestUnpackDependenciesMojo.java

@@ -23,6 +23,7 @@
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Set;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
 import org.apache.maven.artifact.resolver.filter.ScopeArtifactFilter;
@@ -36,7 +37,6 @@
 import org.apache.maven.plugins.dependency.utils.DependencyUtil;
 import org.apache.maven.plugins.dependency.utils.markers.DefaultFileMarkerHandler;
 import org.apache.maven.project.MavenProject;
-import org.codehaus.plexus.util.StringUtils;
 
 public class TestUnpackDependenciesMojo extends AbstractDependencyMojoTestCase {
 

src/test/java/org/apache/maven/plugins/dependency/testUtils/stubs/StubUnpackFileMarkerHandler.java

@@ -19,9 +19,9 @@
 package org.apache.maven.plugins.dependency.testUtils.stubs;
 
 import java.io.File;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.plugins.dependency.fromConfiguration.ArtifactItem;
 import org.apache.maven.plugins.dependency.utils.markers.UnpackFileMarkerHandler;
-import org.codehaus.plexus.util.StringUtils;
 
 public class StubUnpackFileMarkerHandler extends UnpackFileMarkerHandler {
     public StubUnpackFileMarkerHandler(ArtifactItem artifactItem, File markerFilesDirectory) {

src/test/java/org/apache/maven/plugins/dependency/utils/TestDependencyUtil.java

@@ -23,14 +23,14 @@
 import java.util.List;
 import java.util.Random;
 import junit.framework.TestCase;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.artifact.DefaultArtifact;
 import org.apache.maven.artifact.handler.ArtifactHandler;
 import org.apache.maven.artifact.versioning.VersionRange;
 import org.apache.maven.plugin.logging.Log;
 import org.apache.maven.plugin.testing.SilentLog;
 import org.apache.maven.plugin.testing.stubs.DefaultArtifactHandlerStub;
-import org.codehaus.plexus.util.StringUtils;
 
 /**
  * @author brianf