org.btrplace.btrpsl.constraint.SplitBuilder Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of btrpsl Show documentation

The btrplace specification language (btrpsl) allows to express constraints related to the placement of virtual machines in a datacenters. This language is dedicated to datacenters administrators and applications administrators that use Btrplace(http://btrp.inria.fr) to manage their nodes and virtual machines.

The newest version!

/*
 * Copyright  2020 The BtrPlace Authors. All rights reserved.
 * Use of this source code is governed by a LGPL-style
 * license that can be found in the LICENSE.txt file.
 */

package org.btrplace.btrpsl.constraint;

import org.btrplace.btrpsl.element.BtrpOperand;
import org.btrplace.btrpsl.tree.BtrPlaceTree;
import org.btrplace.model.VM;
import org.btrplace.model.constraint.SatConstraint;
import org.btrplace.model.constraint.Split;

import java.util.Collection;
import java.util.Collections;
import java.util.List;

/**
 * A builder for {@link SplitBuilder} constraints.
 *
 * @author Fabien Hermenier
 */
public class SplitBuilder extends DefaultSatConstraintBuilder {

    /**
     * Make a new builder.
     */
    public SplitBuilder() {
        super("split", new ConstraintParam[]{new ListOfParam("$v1", 2, BtrpOperand.Type.VM, false)});
    }

    /**
     * Build a constraint.
     *
     * @param args the parameters of the constraint. Must be 2 non-empty set of virtual machines.
     * @return the constraint
     */
    @Override
    public List buildConstraint(BtrPlaceTree t, List args) {
        if (checkConformance(t, args)) {
            @SuppressWarnings("unchecked") Collection> s = (Collection>) params[0].transform(this, t, args.get(0));
            return s != null ? Collections.singletonList(new Split(s, false)) : Collections.emptyList();
        }
        return Collections.emptyList();
    }
}