ComplexFeaturePlannerFilter.java

package com.tesora.dve.sql.transform.behaviors;

/*
 * #%L
 * Tesora Inc.
 * Database Virtualization Engine
 * %%
 * Copyright (C) 2011 - 2014 Tesora Inc.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

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

import com.tesora.dve.sql.transform.strategy.FeaturePlannerIdentifier;
import com.tesora.dve.sql.transform.strategy.PlannerContext;

public class ComplexFeaturePlannerFilter implements FeaturePlannerFilter {

	private final Set<FeaturePlannerIdentifier> not;
	private final Set<FeaturePlannerIdentifier> forceInclude;
	
	public ComplexFeaturePlannerFilter(Set<FeaturePlannerIdentifier> not, Set<FeaturePlannerIdentifier> forceInclude) {
		super();
		this.not = not;
		this.forceInclude = forceInclude;
	}
	
	public boolean canApply(PlannerContext pc, FeaturePlannerIdentifier id) {
		HashSet<FeaturePlannerIdentifier> applied = new HashSet<FeaturePlannerIdentifier>();
		applied.addAll(not);
		for(FeaturePlannerIdentifier ti : pc.getApplied()) {
			if (!forceInclude.contains(ti))
				applied.add(ti);
		}
		return !applied.contains(id);
	}
	
}