Examples with StepFieldOperations org.pentaho.metaverse.api.StepFieldOperations used on opensource projects

Example 6 with StepFieldOperations

use of org.pentaho.metaverse.api.StepFieldOperations in project pdi-dataservice-server-plugin by pentaho.

the class AutoParameterGenerationService method generateOptimizationList.

private List<PushDownOptimizationMeta> generateOptimizationList(SourceLineageMap sourceLineageMap) {
    Map<String, Set<List<StepFieldOperations>>> inputSteps = Multimaps.asMap(sourceLineageMap);
    List<PushDownOptimizationMeta> optimizationList = Lists.newArrayListWithExpectedSize(inputSteps.size());
    for (Map.Entry<String, Set<List<StepFieldOperations>>> inputStepLineage : inputSteps.entrySet()) {
        String inputStep = inputStepLineage.getKey();
        Set<List<StepFieldOperations>> lineageSet = inputStepLineage.getValue();
        PushDownOptimizationMeta pushDownOptimizationMeta = new PushDownOptimizationMeta();
        ParameterGeneration parameterGeneration = serviceProvider.createPushDown();
        pushDownOptimizationMeta.setName(MessageFormat.format("Parameter Generator: {0}", inputStep));
        pushDownOptimizationMeta.setStepName(inputStep);
        pushDownOptimizationMeta.setType(parameterGeneration);
        parameterGeneration.setParameterName("DATA_SERVICE_QUERY_" + inputStep.replaceAll("\\s", "_").toUpperCase());
        for (List<StepFieldOperations> fieldLineage : lineageSet) {
            StepFieldOperations origin = fieldLineage.get(0);
            StepFieldOperations last = Iterables.getLast(fieldLineage);
            parameterGeneration.createFieldMapping(last.getFieldName(), origin.getFieldName());
        }
        optimizationList.add(pushDownOptimizationMeta);
    }
    return optimizationList;
}