Adding mojos for loading classes, finding resources, and running BSH scripts, all according to the plugin's classpath.

git-svn-id: https://svn.apache.org/repos/asf/maven/components/trunk@367448 13f79535-47bb-0310-9956-ffa450edef68

integration-tests/maven-core-it-plugin/pom.xml

@@ -32,5 +32,10 @@
       <artifactId>jline</artifactId>
       <version>0.9.1</version>
     </dependency>
+    <dependency>
+      <groupId>bsh</groupId>
+      <artifactId>bsh</artifactId>
+      <version>1.3.0</version>
+    </dependency>
   </dependencies>
 </model>

integration-tests/maven-core-it-plugin/src/main/java/org/apache/maven/plugin/coreit/LoadableMojo.java

@@ -0,0 +1,59 @@
+package org.apache.maven.plugin.coreit;
+
+import org.apache.maven.plugin.AbstractMojo;
+import org.apache.maven.plugin.MojoFailureException;
+
+/**
+ * @goal loadable
+ * @requiresDependencyResolution test
+ */
+public class LoadableMojo
+    extends AbstractMojo
+{
+    /**
+     * @parameter
+     * @required
+     */
+    private String className;
+
+    public void execute() throws MojoFailureException
+    {
+        if ( !load( true ) || !load( false ) )
+        {
+            throw new MojoFailureException( this, "Class-loading test failed..", "Failed to load class: " + className + " using one or more methods." );
+        }
+    }
+    
+    private boolean load( boolean useContextClassloader ) throws MojoFailureException
+    {
+        getLog().info( "Executing in java version: " + System.getProperty( "java.version" ) );
+        
+        ClassLoader cl;
+        if ( useContextClassloader )
+        {
+            cl = Thread.currentThread().getContextClassLoader();
+        }
+        else
+        {
+            cl = this.getClass().getClassLoader();
+        }
+
+        getLog().info( "Attepting to load: " + className + " from: " + cl + (useContextClassloader ? " (context classloader)" : "" ) );
+        
+        try
+        {
+            Class result = cl.loadClass( className );
+            
+            getLog().info( "Load succeeded." );
+            
+            return true;
+        }
+        catch ( ClassNotFoundException e )
+        {
+            getLog().info( "Failed to load class: " + className
+                + (useContextClassloader ? " using context classloader" : "") );
+            
+            return false;
+        }
+    }
+}

integration-tests/maven-core-it-plugin/src/main/java/org/apache/maven/plugin/coreit/ReachableMojo.java

@@ -0,0 +1,54 @@
+package org.apache.maven.plugin.coreit;
+
+import org.apache.maven.plugin.AbstractMojo;
+import org.apache.maven.plugin.MojoFailureException;
+
+import java.net.URL;
+
+/**
+ * @goal reachable
+ * @requiresDependencyResolution test
+ */
+public class ReachableMojo extends AbstractMojo
+{
+    /**
+     * @parameter
+     * @required
+     */
+    private String resource;
+    
+    public void execute()
+    throws MojoFailureException
+    {
+        if ( !reach( true ) || !reach( false ) )
+        {
+            throw new MojoFailureException( this, "Resource reachability test failed..", "Failed to reach resource: " + resource + " using one or more methods." );
+        }
+    }
+    
+    public boolean reach( boolean useContextClassloader ) throws MojoFailureException
+    {
+        ClassLoader cl;
+        if ( useContextClassloader )
+        {
+            cl = Thread.currentThread().getContextClassLoader();
+        }
+        else
+        {
+            cl = this.getClass().getClassLoader();
+        }
+        
+        URL result = cl.getResource( resource );
+        
+        getLog().info( "Attepting to reach: " + resource + " from: " + cl + (useContextClassloader ? " (context classloader)" : "" ) + ( result == null ? ": FAILED" : ":SUCCEEDED" ) );
+        
+        if ( result == null )
+        {
+            getLog().info( "Cannot find resource: " + resource + (useContextClassloader?" in context classloader":"") );
+            
+            return false;
+        }
+        
+        return true;
+    }
+}

integration-tests/maven-core-it-plugin/src/main/java/org/apache/maven/plugin/coreit/RunnableMojo.java

@@ -0,0 +1,40 @@
+package org.apache.maven.plugin.coreit;
+
+import bsh.EvalError;
+import bsh.Interpreter;
+
+import org.apache.maven.plugin.AbstractMojo;
+import org.apache.maven.plugin.MojoFailureException;
+
+/**
+ * @goal runnable
+ * @requiresDependencyResolution test
+ */
+public class RunnableMojo
+    extends AbstractMojo
+{
+    /**
+     * @parameter
+     * @required
+     */
+    private String script;
+
+    public void execute() throws MojoFailureException
+    {
+        Interpreter terp = new Interpreter();
+
+        try
+        {
+            getLog().info( "Executing in java version: " + System.getProperty( "java.version" ) );
+            
+            Class result = (Class) terp.eval( script );
+
+            getLog().info( "Result of script evaluation was: " + result + "\nLoaded from: " + result.getClassLoader() );
+        }
+        catch ( EvalError e )
+        {
+            throw new MojoFailureException( this, "Failed to evaluate script.", "Script: \n\n" + script
+                + "\n\nfailed to evaluate. Error: " + e.getMessage() + "\nLine: " + e.getErrorLineNumber() );
+        }
+    }
+}