Package adams.flow.transformer

Class GetListElement

  • All Implemented Interfaces:
    AdditionalInformationHandler, CleanUpHandler, Destroyable, GlobalInfoSupporter, LoggingLevelHandler, LoggingSupporter, OptionHandler, QuickInfoSupporter, ShallowCopySupporter<Actor>, SizeOfHandler, Stoppable, StoppableWithFeedback, VariablesInspectionHandler, VariableChangeListener, Actor, ErrorHandler, InputConsumer, OutputProducer, Serializable, Comparable
    public class GetListElement
extends AbstractTransformer
    Picks an element from a list and forwards only this element.

    Input/output:
    - accepts:
       java.util.List
    - generates:
       adams.flow.core.Unknown


    -logging-level <OFF|SEVERE|WARNING|INFO|CONFIG|FINE|FINER|FINEST> (property: loggingLevel)
    The logging level for outputting errors and debugging output.
    default: WARNING
    min-user-mode: Expert
 
    -name <java.lang.String> (property: name)
    The name of the actor.
    default: GetListElement
 
    -annotation <adams.core.base.BaseAnnotation> (property: annotations)
    The annotations to attach to this actor.
    default:
 
    -skip <boolean> (property: skip)
    If set to true, transformation is skipped and the input token is just forwarded
    as it is.
    default: false
 
    -stop-flow-on-error <boolean> (property: stopFlowOnError)
    If set to true, the flow execution at this level gets stopped in case this
    actor encounters an error; the error gets propagated; useful for critical
    actors.
    default: false
    min-user-mode: Expert
 
    -silent <boolean> (property: silent)
    If enabled, then no errors are output in the console; Note: the enclosing
    actor handler must have this enabled as well.
    default: false
    min-user-mode: Expert
 
    -index <adams.core.Index> (property: index)
    The index of the element to pick.
    default: 1
    example: An index is a number starting with 1; the following placeholders can be used as well: first, second, third, last_2, last_1, last
    Author:
    fracpete (fracpete at waikato dot ac dot nz)
    See Also:
    Serialized Form

    • Field Detail

      • m_Index

        protected Index m_Index
        the index of the element to pick.

    • Constructor Detail

      • GetListElement

        public GetListElement()
        Default constructor.

      • GetListElement

        public GetListElement​(Index index)
        Initializes with the specified index.
        Parameters:
        index - the index to use

    • Method Detail

      • setIndex

        public void setIndex​(Index value)
        Sets the index (1-based).
        Parameters:
        value - the index

      • getIndex

        public Index getIndex()
        Returns the index (1-based).
        Returns:
        the index

      • indexTipText

        public String indexTipText()
        Returns the tip text for this property.
        Returns:
        tip text for this property suitable for displaying in the GUI or for listing the options.

      • accepts

        public Class[] accepts()
        Returns the class that the consumer accepts.
        Returns:
        java.util.List.class

      • generates

        public Class[] generates()
        Returns the class of objects that it generates.
        Returns:
        adams.flow.core.Unknown.class

      • doExecute

        protected String doExecute()
        Executes the flow item.
        Specified by:
        doExecute in class AbstractActor
        Returns:
        null if everything is fine, otherwise error message