[SOLVED] Caching getParameterTypes?

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  Nils_Woehler Member Posts: 463 Maven

  November 2012

  Hi,
  
  yes, getParameterTypes is called quite often. Because of this it should not take too long to finish.
  If you want to cache your parameterTypes you could try to do something like this:

  
  public class TestOperator extends Operator {
  
  	private static final String PARAMETER_CHUNK_SIZE = "chunk_size";
  	private static final int DEFAULT_BATCH_SIZE = 10;
  
  	/**
  	 * @param description
  	 */
  	public TestOperator(OperatorDescription description) {
  		super(description);
  	}
  
  	private List<ParameterType> parameterTypes = null;
  
  @Override
  	public List<ParameterType> getParameterTypes() {
  		if (parameterTypes == null) {
  			parameterTypes = new LinkedList<ParameterType>();
  			ParameterTypeInt type = new ParameterTypeInt(PARAMETER_CHUNK_SIZE, "???", 1, Integer.MAX_VALUE, DEFAULT_BATCH_SIZE);
  			type.setOptional(false);
  			parameterTypes.add(type);
  		}
  		return parameterTypes;
  	}
  }
  

  And yes the cached values are specific for each instance of the operator.
  
  Best,
  Nils

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