Package it.unimi.dsi.big.webgraph.labelling

Interface LabelMergeStrategy

public interface LabelMergeStrategy

A way to merge two labels into one; the actual merge is performed by the merge(Label, Label) method. Usually, strategies require that the two labels provided are of the same kind (i.e., instances of the same Label class). Moreover, some strategies only accept label of a certain type, and throw an IllegalArgumentException if the type is wrong.

Method Summary

Modifier and Type	Method	Description
Label	merge(Label first, Label second)	Merges two given labels; either label may be null, but not both.

Method Detail

merge

Label merge(Label first,
            Label second)

Merges two given labels; either label may be null, but not both. Implementing classes may decide to throw an IllegalArgumentException if the labels provided are not of the same type, or not of a specific type.

Parameters:

first - the first label to be merged.

second - the second label to be merged.

Returns:

the resulting label (note that the returned label may be reused by the implementing class, so users are invited to make a Label.copy() of it if they need to keep the label in between calls).