[MCHECKSTYLE-453] Convert injection to Sisu Guice (#160)

* sisu plugin

pom.xml

@@ -159,9 +159,9 @@ under the License.
 
     <!-- plexus -->
     <dependency>
-      <groupId>org.codehaus.plexus</groupId>
-      <artifactId>plexus-component-annotations</artifactId>
-      <version>2.2.0</version>
+      <groupId>org.eclipse.sisu</groupId>
+      <artifactId>org.eclipse.sisu.inject</artifactId>
+      <scope>provided</scope>
     </dependency>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
@@ -325,16 +325,8 @@ under the License.
         </executions>
       </plugin>
       <plugin>
-        <groupId>org.codehaus.plexus</groupId>
-        <artifactId>plexus-component-metadata</artifactId>
-        <version>2.2.0</version>
-        <executions>
-          <execution>
-            <goals>
-              <goal>generate-metadata</goal>
-            </goals>
-          </execution>
-        </executions>
+        <groupId>org.eclipse.sisu</groupId>
+        <artifactId>sisu-maven-plugin</artifactId>
       </plugin>
     </plugins>
   </build>

src/main/java/org/apache/maven/plugins/checkstyle/AbstractCheckstyleReport.java

@@ -44,7 +44,6 @@
 import org.apache.maven.model.PluginManagement;
 import org.apache.maven.model.Resource;
 import org.apache.maven.plugin.descriptor.PluginDescriptor;
-import org.apache.maven.plugins.annotations.Component;
 import org.apache.maven.plugins.annotations.Parameter;
 import org.apache.maven.plugins.checkstyle.exec.CheckstyleExecutor;
 import org.apache.maven.plugins.checkstyle.exec.CheckstyleExecutorException;
@@ -61,8 +60,6 @@
 
 /**
  * Base abstract class for Checkstyle reports.
- *
- *
  */
 public abstract class AbstractCheckstyleReport extends AbstractMavenReport {
     protected static final String JAVA_FILES = "**\\/*.java";
@@ -440,25 +437,27 @@ public abstract class AbstractCheckstyleReport extends AbstractMavenReport {
     @Parameter(property = "checkstyle.excludeGeneratedSources", defaultValue = "false")
     private boolean excludeGeneratedSources;
 
-    /**
-     */
-    @Component
     protected ResourceManager locator;
 
     /**
      * @since 2.5
      */
-    @Component(role = CheckstyleExecutor.class, hint = "default")
-    protected CheckstyleExecutor checkstyleExecutor;
+    protected final CheckstyleExecutor checkstyleExecutor;
 
     /**
      * Internationalization component
      */
-    @Component
     private I18N i18n;
 
     protected ByteArrayOutputStream stringOutputStream;
 
+    public AbstractCheckstyleReport(
+            final ResourceManager locator, final CheckstyleExecutor checkstyleExecutor, final I18N i18n) {
+        this.locator = locator;
+        this.checkstyleExecutor = checkstyleExecutor;
+        this.i18n = i18n;
+    }
+
     /** {@inheritDoc} */
     @Override
     public String getName(Locale locale) {

src/main/java/org/apache/maven/plugins/checkstyle/CheckstyleAggregateReport.java

@@ -18,27 +18,39 @@
  */
 package org.apache.maven.plugins.checkstyle;
 
+import javax.inject.Inject;
+import javax.inject.Named;
+
 import org.apache.maven.plugins.annotations.Mojo;
 import org.apache.maven.plugins.annotations.ResolutionScope;
+import org.apache.maven.plugins.checkstyle.exec.CheckstyleExecutor;
 import org.apache.maven.plugins.checkstyle.exec.CheckstyleExecutorRequest;
 import org.apache.maven.reporting.MavenReportException;
+import org.codehaus.plexus.i18n.I18N;
+import org.codehaus.plexus.resource.ResourceManager;
 
 /**
  * A reporting task that performs Checkstyle analysis and generates an aggregate
  * HTML report on the violations that Checkstyle finds in a multi-module reactor
  * build.
- *
- *
  */
 @Mojo(
         name = "checkstyle-aggregate",
         aggregator = true,
         requiresDependencyResolution = ResolutionScope.COMPILE,
         threadSafe = true)
 public class CheckstyleAggregateReport extends AbstractCheckstyleReport {
+
+    @Inject
+    public CheckstyleAggregateReport(
+            ResourceManager locator, @Named("default") CheckstyleExecutor checkstyleExecutor, I18N i18n) {
+        super(locator, checkstyleExecutor, i18n);
+    }
+
     /**
      * {@inheritDoc}
      */
+    @Override
     protected CheckstyleExecutorRequest createRequest() throws MavenReportException {
         CheckstyleExecutorRequest request = new CheckstyleExecutorRequest();
         request.setAggregate(true)
@@ -70,11 +82,13 @@ protected CheckstyleExecutorRequest createRequest() throws MavenReportException
     }
 
     /** {@inheritDoc} */
+    @Override
     public String getOutputName() {
         return "checkstyle-aggregate";
     }
 
     /** {@inheritDoc} */
+    @Override
     public boolean canGenerateReport() {
         // TODO: would be good to scan the files here
         return !skip && project.isExecutionRoot() && reactorProjects.size() > 1;

src/main/java/org/apache/maven/plugins/checkstyle/CheckstyleReport.java

@@ -18,14 +18,20 @@
  */
 package org.apache.maven.plugins.checkstyle;
 
+import javax.inject.Inject;
+import javax.inject.Named;
+
 import java.io.File;
 import java.util.List;
 
 import org.apache.maven.model.Resource;
 import org.apache.maven.plugins.annotations.Mojo;
 import org.apache.maven.plugins.annotations.ResolutionScope;
+import org.apache.maven.plugins.checkstyle.exec.CheckstyleExecutor;
 import org.apache.maven.plugins.checkstyle.exec.CheckstyleExecutorRequest;
 import org.apache.maven.reporting.MavenReportException;
+import org.codehaus.plexus.i18n.I18N;
+import org.codehaus.plexus.resource.ResourceManager;
 
 /**
  * A reporting task that performs Checkstyle analysis and generates an HTML
@@ -38,9 +44,19 @@
  */
 @Mojo(name = "checkstyle", requiresDependencyResolution = ResolutionScope.COMPILE, threadSafe = true)
 public class CheckstyleReport extends AbstractCheckstyleReport {
+
+    @Inject
+    public CheckstyleReport(
+            final ResourceManager locator,
+            final @Named("default") CheckstyleExecutor checkstyleExecutor,
+            final I18N i18n) {
+        super(locator, checkstyleExecutor, i18n);
+    }
+
     /**
      * {@inheritDoc}
      */
+    @Override
     protected CheckstyleExecutorRequest createRequest() throws MavenReportException {
         CheckstyleExecutorRequest request = new CheckstyleExecutorRequest();
         request.setConsoleListener(getConsoleListener())
@@ -70,11 +86,13 @@ protected CheckstyleExecutorRequest createRequest() throws MavenReportException
     }
 
     /** {@inheritDoc} */
+    @Override
     public String getOutputName() {
         return "checkstyle";
     }
 
     /** {@inheritDoc} */
+    @Override
     public boolean canGenerateReport() {
         if (skip) {
             return false;

src/main/java/org/apache/maven/plugins/checkstyle/CheckstyleViolationCheckMojo.java

@@ -18,6 +18,9 @@
  */
 package org.apache.maven.plugins.checkstyle;
 
+import javax.inject.Inject;
+import javax.inject.Named;
+
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileNotFoundException;
@@ -47,7 +50,6 @@
 import org.apache.maven.plugin.MojoExecutionException;
 import org.apache.maven.plugin.MojoFailureException;
 import org.apache.maven.plugin.descriptor.PluginDescriptor;
-import org.apache.maven.plugins.annotations.Component;
 import org.apache.maven.plugins.annotations.LifecyclePhase;
 import org.apache.maven.plugins.annotations.Mojo;
 import org.apache.maven.plugins.annotations.Parameter;
@@ -294,12 +296,6 @@ public class CheckstyleViolationCheckMojo extends AbstractMojo {
     @Parameter(property = "encoding", defaultValue = "${project.build.sourceEncoding}")
     private String inputEncoding;
 
-    /**
-     * @since 2.5
-     */
-    @Component(role = CheckstyleExecutor.class, hint = "default")
-    protected CheckstyleExecutor checkstyleExecutor;
-
     /**
      * Output errors to console.
      */
@@ -487,6 +483,16 @@ public class CheckstyleViolationCheckMojo extends AbstractMojo {
 
     private File outputXmlFile;
 
+    /**
+     * @since 2.5
+     */
+    protected final CheckstyleExecutor checkstyleExecutor;
+
+    @Inject
+    public CheckstyleViolationCheckMojo(final @Named("default") CheckstyleExecutor checkstyleExecutor) {
+        this.checkstyleExecutor = checkstyleExecutor;
+    }
+
     /** {@inheritDoc} */
     @Override
     public void execute() throws MojoExecutionException, MojoFailureException {

src/main/java/org/apache/maven/plugins/checkstyle/exec/CheckstyleExecutor.java

@@ -24,15 +24,14 @@
 /**
  * @author Olivier Lamy
  * @since 2.5
- *
  */
 public interface CheckstyleExecutor {
 
     /**
      * @param request {@link CheckstyleExecutorRequest}
      * @return {@link CheckstyleResults}
-     * @throws CheckstyleExecutorException in case of an error during plugin execution.
-     * @throws CheckstyleException in case of an error raised by Checkstyle.
+     * @throws CheckstyleExecutorException in case of an error during plugin execution
+     * @throws CheckstyleException in case of an error raised by Checkstyle
      */
     CheckstyleResults executeCheckstyle(CheckstyleExecutorRequest request)
             throws CheckstyleExecutorException, CheckstyleException;

src/main/java/org/apache/maven/plugins/checkstyle/exec/DefaultCheckstyleExecutor.java

@@ -18,6 +18,9 @@
  */
 package org.apache.maven.plugins.checkstyle.exec;
 
+import javax.inject.Inject;
+import javax.inject.Named;
+
 import java.io.ByteArrayInputStream;
 import java.io.File;
 import java.io.FileInputStream;
@@ -49,28 +52,33 @@
 import org.apache.maven.artifact.DependencyResolutionRequiredException;
 import org.apache.maven.model.Resource;
 import org.apache.maven.project.MavenProject;
-import org.codehaus.plexus.component.annotations.Component;
-import org.codehaus.plexus.component.annotations.Requirement;
 import org.codehaus.plexus.logging.AbstractLogEnabled;
 import org.codehaus.plexus.resource.ResourceManager;
 import org.codehaus.plexus.resource.loader.FileResourceCreationException;
 import org.codehaus.plexus.resource.loader.FileResourceLoader;
 import org.codehaus.plexus.resource.loader.ResourceNotFoundException;
 import org.codehaus.plexus.util.FileUtils;
+import org.eclipse.sisu.Typed;
 
 /**
  * @author Olivier Lamy
  * @since 2.5
- *
  */
-@Component(role = CheckstyleExecutor.class, hint = "default", instantiationStrategy = "per-lookup")
+@Named
+@Typed(CheckstyleExecutor.class)
 public class DefaultCheckstyleExecutor extends AbstractLogEnabled implements CheckstyleExecutor {
-    @Requirement(hint = "default")
-    private ResourceManager locator;
+    private final ResourceManager locator;
 
-    @Requirement(hint = "license")
-    private ResourceManager licenseLocator;
+    private final ResourceManager licenseLocator;
+
+    @Inject
+    public DefaultCheckstyleExecutor(
+            final @Named("default") ResourceManager locator, final @Named("license") ResourceManager licenseLocator) {
+        this.locator = locator;
+        this.licenseLocator = licenseLocator;
+    }
 
+    @Override
     public CheckstyleResults executeCheckstyle(CheckstyleExecutorRequest request)
             throws CheckstyleExecutorException, CheckstyleException {
         if (getLogger().isDebugEnabled()) {
@@ -255,6 +263,7 @@ protected void addSourceDirectory(
         }
     }
 
+    @Override
     public Configuration getConfiguration(CheckstyleExecutorRequest request) throws CheckstyleExecutorException {
         try {
             // Checkstyle will always use the context classloader in order

src/main/java/org/apache/maven/plugins/checkstyle/resource/LicenseResourceManager.java

@@ -19,14 +19,12 @@
 package org.apache.maven.plugins.checkstyle.resource;
 
 import javax.inject.Inject;
+import javax.inject.Named;
 
 import java.util.Map;
 
-import org.codehaus.plexus.component.annotations.Component;
-import org.codehaus.plexus.component.annotations.Requirement;
 import org.codehaus.plexus.resource.DefaultResourceManager;
 import org.codehaus.plexus.resource.PlexusResource;
-import org.codehaus.plexus.resource.ResourceManager;
 import org.codehaus.plexus.resource.loader.ResourceLoader;
 import org.codehaus.plexus.resource.loader.ResourceNotFoundException;
 import org.codehaus.plexus.resource.loader.ThreadContextClasspathResourceLoader;
@@ -38,17 +36,17 @@
  *
  * @since 2.12
  */
-@Component(role = ResourceManager.class, hint = "license", instantiationStrategy = "per-lookup")
+@Named("license")
 public class LicenseResourceManager extends DefaultResourceManager {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(LicenseResourceManager.class);
 
-    @Requirement(role = ResourceLoader.class)
-    private Map<String, ResourceLoader> resourceLoaders;
+    private final Map<String, ResourceLoader> resourceLoaders;
 
     @Inject
     public LicenseResourceManager(Map<String, ResourceLoader> resourceLoaders) {
         super(resourceLoaders);
+        this.resourceLoaders = resourceLoaders;
     }
 
     @Override

src/test/java/org/apache/maven/plugins/checkstyle/CheckstyleReportTest.java

@@ -36,7 +36,8 @@
 public class CheckstyleReportTest extends AbstractCheckstyleTestCase {
     public void testNoSource() throws Exception {
         File generatedReport = generateReport(getGoal(), "no-source-plugin-config.xml");
-        assertFalse(FileUtils.fileExists(generatedReport.getAbsolutePath()));
+        String absolutePath = generatedReport.getAbsolutePath();
+        assertFalse(absolutePath + " exists", FileUtils.fileExists(absolutePath));
     }
 
     public void testMinConfiguration() throws Exception {

src/test/java/org/apache/maven/plugins/checkstyle/exec/CheckstyleExecutorTest.java

@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.maven.plugins.checkstyle.exec;
+
+import org.apache.maven.plugin.testing.AbstractMojoTestCase;
+
+public class CheckstyleExecutorTest extends AbstractMojoTestCase {
+    public void testDefaultConfig() throws Exception {
+        CheckstyleExecutor executor = (CheckstyleExecutor) lookup(CheckstyleExecutor.class);
+        assertNotNull("project null.", executor);
+    }
+}