VarUsage.java

package org.aksw.jena_sparql_api.concept_cache.core;

import java.util.HashSet;
import java.util.Set;

import org.apache.jena.sparql.core.Var;

import com.google.common.collect.Multimap;

public class VarUsage {
	protected Set<Var> referencedVars;
	protected Set<Var> nonUnique;
	protected Multimap<Var, Var> varDeps;
	protected Set<Set<Var>> uniqueSets;

	public VarUsage(
			Set<Var> referencedVars,
			Set<Var> nonUnique,
			Multimap<Var, Var> varDeps,
			Set<Set<Var>> uniqueSets) {
		super();
		this.referencedVars = referencedVars;
		this.nonUnique = nonUnique;
		this.varDeps = varDeps;
		this.uniqueSets = uniqueSets;
	}

	public Set<Var> getReferencedVars() {
		return referencedVars;
	}

	public Set<Var> getNonUnique() {
		return nonUnique;
	}

	public Multimap<Var, Var> getVarDeps() {
		return varDeps;
	}

	public Set<Set<Var>> getUniqueSets() {
		return uniqueSets;
	}

	@Override
	public String toString() {
		return "VarUsage[ proj:" + varDeps.keySet() + ", refs: " + referencedVars +
				", deps: " + varDeps + ", non-uniq: " + nonUnique + ", uniq sets: " + uniqueSets + "]";
	}


	public static Set<Var> getMandatoryVars(VarUsage varUsage) {
		Set<Var> result = new HashSet<Var>();
		result.addAll(varUsage.referencedVars);
		result.addAll(varUsage.varDeps.values());
		return result;
	}

}