Class MergeFeatureHolder

    • Constructor Detail

      • MergeFeatureHolder

        public MergeFeatureHolder()
        Create a new, empty, MergeFeatureHolder.
    • Method Detail

      • addFeatureHolder

        public void addFeatureHolder​(FeatureHolder fh)
                              throws ChangeVetoException
        Add an extra FeatureHolder to the set of FeatureHolders which are merged. This method is provided for backward compatibility, and is equivalent to:
             mfh.addFeatureHolder(fh, FeatureFilter.all);

        You should always use the two-arg version in preference if you are able to define the membership of a FeatureHolder.

      • countFeatures

        public int countFeatures()
        Description copied from interface: FeatureHolder
        Count how many features are contained.
        Specified by:
        countFeatures in interface FeatureHolder
        a positive integer or zero, equal to the number of features contained
      • features

        public Iterator features()
        Iterate over all the features in all child FeatureHolders. The Iterator may throw ConcurrantModificationException if there is a change in the underlying collections during iteration.
        Specified by:
        features in interface FeatureHolder
        an Iterator
      • filter

        public FeatureHolder filter​(FeatureFilter ff,
                                    boolean recurse)
        When applied to a MergeFeatureHolder, this filters each child FeatureHolder independently.
        Specified by:
        filter in interface FeatureHolder
        filter in class AbstractFeatureHolder
        ff - the FeatureFilter to apply
        recurse - true if all features-of-features should be scanned, and a single flat collection of features returned, or false if just immediate children should be filtered.
      • getSchema

        public FeatureFilter getSchema()
        Description copied from interface: FeatureHolder
        Return a schema-filter for this FeatureHolder. This is a filter which all Features immediately contained by this FeatureHolder will match. It need not directly match their child features, but it can (and should!) provide information about them using FeatureFilter.OnlyChildren filters. In cases where there is no feature hierarchy, this can be indicated by including FeatureFilter.leaf in the schema filter.

        For the truly non-informative case, it is possible to return FeatureFilter.all. However, it is almost always possible to provide slightly more information that this. For example, Sequence objects should, at a minimum, return FeatureFilter.top_level. Feature objects should, as a minimum, return FeatureFilter.ByParent(new FeatureFilter.ByFeature(this)).

        Specified by:
        getSchema in interface FeatureHolder
        the schema filter