Package com.northconcepts.datapipeline.filter

Class FilterExpression

java.lang.Object
com.northconcepts.datapipeline.filter.Filter
com.northconcepts.datapipeline.filter.FilterExpression
public class FilterExpression extends Filter
A Filter that keeps records for which a logical expression-language condition evaluates to true.

  • Constructor Details

    • FilterExpression

      public FilterExpression(String logicalExpression, FieldDeclarations fieldDeclarations)
      Creates a filter for the given logical expression, which is parsed immediately; field types declared in fieldDeclarations take precedence over those inferred from each record.

    • FilterExpression

      public FilterExpression(String logicalExpression)

  • Method Details

    • allow

      public boolean allow(Record record)
      Description copied from class: Filter
      Tests whether a record passes this filter.

      Contract for subclasses (see also docs/authoring/Filter.md):

      • Return true to keep the record.
      • Return false to discard the record (routed to a discard writer if the host FilteringReader is configured with one).
      • Must be a pure decision — do not mutate the record here.
      • Throw DataException only for unrecoverable filter failures; for ordinary "data fails predicate" cases, return false.
      Specified by:
      allow in class Filter

    • getExpression

      public LogicalExpression getExpression()

    • getExpressionAsString

      public String getExpressionAsString()

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • equals

      public boolean equals(Object obj)
      Overrides:
      equals in class Object