modulo3documentalclusteringstrategy.java

MG4J (Managing Gigabytes for Java) is a free full-text search engine for large document collections

package test.it.unimi.dsi.mg4j.tool;

import it.unimi.dsi.mg4j.index.cluster.DocumentalClusteringStrategy;
import it.unimi.dsi.mg4j.index.cluster.DocumentalPartitioningStrategy;
import it.unimi.dsi.util.Properties;

public final class Modulo3DocumentalClusteringStrategy implements DocumentalClusteringStrategy, DocumentalPartitioningStrategy {
	private static final long serialVersionUID = 1L;

	final int documents;

	public Modulo3DocumentalClusteringStrategy( final int documents ) {
		this.documents = documents;
	}

	public int globalPointer( int localIndex, int localPointer ) { return localPointer; }
	public int localPointer( int globalPointer ) { return globalPointer; }
	public int numberOfDocuments( int localIndex ) { return documents; }
	public int numberOfLocalIndices() { return 3; }
	public int localIndex( int globalPointer ) { return globalPointer % 3; }
	public Properties[] properties() { return new Properties[ 3 ]; }
}