How to use

NamedParamsDefault

in

org.pentaho.di.core.parameters

partitionSchemas = new ArrayList<>();
clusterSchemas = new ArrayList<>();
namedParams = new NamedParamsDefault();
stepChangeListeners = new ArrayList<>();

 addParameterDefinition( key, defValue, desc );
} catch ( DuplicateParamException e ) {
 params.get( key ).defaultValue = defValue;
 params.get( key ).description = desc;
setParameterValue( key, value );

@Override
public void clearParameters() {
 String[] keys = listParameters();
 for ( int idx = 0; idx < keys.length; idx++ ) {
  OneNamedParam theParam = params.get( keys[idx] );
  if ( theParam != null ) {
   theParam.value = "";
  }
 }
}

private NamedParams filterUserParameters( NamedParams params ) {
 NamedParams userParams = new NamedParamsDefault();
 if ( !isEmpty( params ) ) {
  for ( String paramName : params.listParameters() ) {
   if ( isUserParameter( paramName ) ) {
    try {
     userParams.addParameterDefinition( paramName, StringUtils.EMPTY, StringUtils.EMPTY );
    } catch ( DuplicateParamException e ) {
     // ignore
    }
   }
  }
 }
 return userParams;
}

 addParameterDefinition( keys[idx], defValue, desc );
} catch ( DuplicateParamException e ) {
setParameterValue( keys[idx], value );

jobMeta.databases = new ArrayList<DatabaseMeta>();
jobMeta.slaveServers = new ArrayList<SlaveServer>();
jobMeta.namedParams = new NamedParamsDefault();

StringBuilder optionVersion, optionJarFilename, optionListParam, optionMetrics, initialDir;
NamedParams optionParams = new NamedParamsDefault();

StringBuilder optionFilename, optionLoglevel, optionLogfile, optionLogfileOld, optionListdir;
StringBuilder optionListjobs, optionListrep, optionNorep, optionVersion, optionListParam, optionExport;
NamedParams optionParams = new NamedParamsDefault();
NamedParams customOptions = new NamedParamsDefault();

transMeta.slaveServers = new ArrayList<>();
transMeta.clusterSchemas = new ArrayList<>();
transMeta.namedParams = new NamedParamsDefault();
transMeta.stepChangeListeners = new ArrayList<>();

@Test
public void testConfigureParameters() throws Exception {
 TransMeta transMeta = new TransMeta();
 transMeta.addParameterDefinition( TEST_PARAM_NAME, DEFAULT_PARAM_VALUE, "This tests a default parameter" );
 assertEquals( "Default parameter was not set correctly on TransMeta",
  DEFAULT_PARAM_VALUE, transMeta.getParameterDefault( TEST_PARAM_NAME ) );
 assertEquals( "Parameter value should be blank in TransMeta", "", transMeta.getParameterValue( TEST_PARAM_NAME ) );
 Trans trans = new Trans( transMeta );
 assertEquals( "Default parameter was not set correctly on Trans",
  DEFAULT_PARAM_VALUE, trans.getParameterDefault( TEST_PARAM_NAME ) );
 assertEquals( "Parameter value should be blank in Trans", "", trans.getParameterValue( TEST_PARAM_NAME ) );
 NamedParams params = new NamedParamsDefault();
 params.addParameterDefinition( TEST_PARAM_NAME, NOT_DEFAULT_PARAM_VALUE, "This tests a non-default parameter" );
 params.setParameterValue( TEST_PARAM_NAME, NOT_DEFAULT_PARAM_VALUE );
 Pan.configureParameters( trans, params, transMeta );
 assertEquals( "Parameter was not set correctly in Trans",
  NOT_DEFAULT_PARAM_VALUE, trans.getParameterValue( TEST_PARAM_NAME ) );
 assertEquals( "Parameter was not set correctly in TransMeta",
  NOT_DEFAULT_PARAM_VALUE, transMeta.getParameterValue( TEST_PARAM_NAME ) );
}

NamedParams namedParam = new NamedParamsDefault();

NamedParams namedParam = new NamedParamsDefault();
if ( parameters != null ) {
 for ( int idx = 0; idx < parameters.length; idx++ ) {

assertNull( meta.getParameterValue( "var1" ) );
NamedParams newParams = new NamedParamsDefault();
newParams.addParameterDefinition( "var3", "default", "description" );
newParams.setParameterValue( "var3", "a" );