Package com.norconex.importer.handler.filter.impl

Class NumericMetadataFilter

  • All Implemented Interfaces:
    IXMLConfigurable, IDocumentFilter, IOnMatchFilter, IImporterHandler
    public class NumericMetadataFilter
extends AbstractDocumentFilter

    Accepts or rejects a document based on the numeric value(s) of matching metadata fields, supporting decimals. If multiple values are found for a field, only one of them needs to match for this filter to take effect. If the value is not a valid number, it is considered not to be matching. The decimal character is expected to be a dot. To reject decimals or to deal with non-numeric fields in your own way, you can use TextFilter.

    XML configuration usage:

    
<handler
    class="com.norconex.importer.handler.filter.impl.NumericMetadataFilter"
    onMatch="[include|exclude]">
  <!-- multiple "restrictTo" tags allowed (only one needs to match) -->
  <restrictTo>
    <fieldMatcher>(field-matching expression)</fieldMatcher>
    <valueMatcher>(value-matching expression)</valueMatcher>
  </restrictTo>
  <fieldMatcher>(expression matching numeric fields to filter)</fieldMatcher>
  <!--
    Use one or two (for ranges) conditions,
            where possible operators are:

              gt -> greater than
              ge -> greater equal
              lt -> lower than
              le -> lowe equal
              eq -> equals
    -->
  <condition
      operator="[gt|ge|lt|le|eq]"
      number="(number)"/>
</handler>

    XML usage example:

    
<handler
    class="NumericMetadataFilter"
    onMatch="include">
  <fieldMatcher>age</fieldMatcher>
  <condition
      operator="ge"
      number="20"/>
  <condition
      operator="lt"
      number="30"/>
</handler>

    Let's say you are importing customer profile documents and you have a field called "age" and you need to only consider documents for customers in their twenties (greater or equal to 20, but lower than 30). The above example would achieve that.

    Since:
    2.2.0
    Author:
    Pascal Essiembre