[BACKLOG-8241] - Move the writing out of the Metadata-Injected KTR ... (

#2582)

* [BACKLOG-8241] - Move the writing out of the Metadata-Injected KTR from before execution to after to allow for customizations to MDI to happen in a step's init() method. This allows for complex data structures to be handled in a manual fashion when traditional annotation-based MDI isn't sufficient.

* [CLEANUP] - License header date

engine/src/org/pentaho/di/trans/steps/metainject/MetaInject.java

@@ -2,7 +2,7 @@
  *
  * Pentaho Data Integration
  *
- * Copyright (C) 2002-2013 by Pentaho : http://www.pentaho.com
+ * Copyright (C) 2002-2016 by Pentaho : http://www.pentaho.com
  *
  *******************************************************************************
  *
@@ -22,18 +22,6 @@
 
 package org.pentaho.di.trans.steps.metainject;
 
-import java.io.IOException;
-import java.io.OutputStream;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Set;
-
 import org.pentaho.di.core.Const;
 import org.pentaho.di.core.Result;
 import org.pentaho.di.core.RowMetaAndData;
@@ -61,6 +49,18 @@
 import org.pentaho.di.trans.step.StepMetaInjectionInterface;
 import org.pentaho.di.trans.step.StepMetaInterface;
 
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
 /**
  * Read a simple CSV file Just output Strings found in the file...
  *
@@ -118,30 +118,6 @@ public boolean processRow( StepMetaInterface smi, StepDataInterface sdi ) throws
       }
     }
 
-    if ( log.isDetailed() ) {
-      logDetailed( "XML of transformation after injection: " + data.transMeta.getXML() );
-    }
-    String targetFile = environmentSubstitute( meta.getTargetFile() );
-    if ( !Const.isEmpty( targetFile ) ) {
-      OutputStream os = null;
-      try {
-        os = KettleVFS.getOutputStream( targetFile, false );
-        os.write( XMLHandler.getXMLHeader().getBytes( Const.XML_ENCODING ) );
-        os.write( data.transMeta.getXML().getBytes( Const.XML_ENCODING ) );
-      } catch ( IOException e ) {
-        throw new KettleException( "Unable to write target file (ktr after injection) to file '" + targetFile + "'",
-            e );
-      } finally {
-        if ( os != null ) {
-          try {
-            os.close();
-          } catch ( Exception e ) {
-            throw new KettleException( e );
-          }
-        }
-      }
-    }
-
     if ( !meta.isNoExecution() ) {
       // Now we can execute this modified transformation metadata.
       //
@@ -215,13 +191,42 @@ public void rowWrittenEvent( RowMetaInterface rowMeta, Object[] row ) throws Ket
       copyResult( injectTrans );
     }
 
+    // let the transformation complete it's execution to allow for any customizations to MDI to happen in the init methods of steps
+    if ( log.isDetailed() ) {
+      logDetailed( "XML of transformation after injection: " + data.transMeta.getXML() );
+    }
+    String targetFile = environmentSubstitute( meta.getTargetFile() );
+    if ( !Const.isEmpty( targetFile ) ) {
+      writeInjectedKtr( targetFile );
+    }
+
     // All done!
 
     setOutputDone();
 
     return false;
   }
 
+  private void writeInjectedKtr( String targetFile ) throws KettleException {
+    OutputStream os = null;
+    try {
+      os = KettleVFS.getOutputStream( targetFile, false );
+      os.write( XMLHandler.getXMLHeader().getBytes( Const.XML_ENCODING ) );
+      os.write( data.transMeta.getXML().getBytes( Const.XML_ENCODING ) );
+    } catch ( IOException e ) {
+      throw new KettleException( "Unable to write target file (ktr after injection) to file '" + targetFile + "'",
+        e );
+    } finally {
+      if ( os != null ) {
+        try {
+          os.close();
+        } catch ( Exception e ) {
+          throw new KettleException( e );
+        }
+      }
+    }
+  }
+
   private void newInjection( String targetStep, StepMetaInterface targetStepMeta ) throws KettleException {
     if ( log.isDetailed() ) {
       logDetailed( "Handing step '" + targetStep + "' injection!" );