public class GeneratorFactory extends Object
<generators> <charngram min = "2" max = "5"/> <definition/> <cache> <window prevLength = "3" nextLength = "3"> <generators> <prevmap/> <sentence/> <tokenclass/> <tokenpattern/> </generators> </window> </cache> </generators>Each XML element is mapped to a
GeneratorFactory.XmlFeatureGeneratorFactorywhich is responsible to process the element and create the specified
AdaptiveFeatureGenerator. Elements can contain other elements in this case it is the responsibility of the mapped factory to process the child elements correctly. In some factories this leads to recursive calls the
GeneratorFactory.XmlFeatureGeneratorFactory.create(Element, FeatureGeneratorResourceProvider)method. In the example above the generators element is mapped to the
GeneratorFactory.AggregatedFeatureGeneratorFactorywhich then creates all the aggregated
AdaptiveFeatureGenerators to accomplish this it evaluates the mapping with the same mechanism and gives the child element to the corresponding factories. All created generators are added to a new instance of the
AggregatedFeatureGeneratorwhich is then returned.
|Constructor and Description|
|Modifier and Type||Method and Description|
Provides a list with all the elements in the xml feature descriptor.
public static AdaptiveFeatureGenerator create(InputStream xmlDescriptorIn, FeatureGeneratorResourceProvider resourceManager) throws IOException
AdaptiveFeatureGeneratorfrom an provided XML descriptor. Usually this XML descriptor contains a set of nested feature generators which are then used to generate the features by one of the opennlp components.
InputStreamfrom which the descriptor is read, the stream remains open and must be closed by the caller.
resourceManager- the resource manager which is used to resolve resources referenced by a key in the descriptor
IOException- if an error occurs during reading from the descriptor
public static Map<String,ArtifactSerializer<?>> extractArtifactSerializerMappings(InputStream xmlDescriptorIn) throws IOException
public static List<Element> getDescriptorElements(InputStream xmlDescriptorIn) throws IOException
xmlDescriptorIn- the xml feature descriptor
IOException- if inputstream cannot be open
InvalidFormatException- if xml is not well-formed
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