public OperationPipeline createPipeline(Operation op, IntegrationEntityLookup lookup) {
SourceActivity trans_source = SourceActivity.newInstance(lookup.getEntity(op.getSourceId(), Source.class),
TransformationTemplate.SOURCE);
TransformationActivity trans = TransformationActivity.newInstance(lookup.getEntity(op.getTransformationId(),
Transformation.class), TransformationTemplate.TRANSFORMATION);
TargetActivity trans_target = TargetActivity.newInstance(lookup.getEntity(op.getTargetId(), Target.class),
TransformationTemplate.TARGET);
List<PipelineActivity> activities = Lists.newArrayList();
activities.add(trans_source);
activities.add(trans);
activities.add(trans_target);