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org.btrplace.btrpsl.constraint.migration.SerializeBuilder Maven / Gradle / Ivy

/*
 * Copyright (c) 2014 University Nice Sophia Antipolis
 *
 * This file is part of btrplace.
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see .
 */

package org.btrplace.btrpsl.constraint.migration;

import org.btrplace.btrpsl.constraint.ConstraintParam;
import org.btrplace.btrpsl.constraint.DefaultSatConstraintBuilder;
import org.btrplace.btrpsl.constraint.ListOfParam;
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.migration.Serialize;

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

/**
 * A builder for {@link org.btrplace.model.constraint.migration.Serialize} constraints.
 *
 * @author Vincent Kherbache
 */
public class SerializeBuilder extends DefaultSatConstraintBuilder {

    /**
     * Make a new builder.
     */
    public SerializeBuilder() {
        super("serialize", new ConstraintParam[]{new ListOfParam("$vms", 1, BtrpOperand.Type.VM, false)});
    }

    /**
     * Build a serialize constraint.
     *
     * @param t    the current tree
     * @param args must be 1 set of vms. The set must not be empty
     * @return  a constraint
     */
    public List buildConstraint(BtrPlaceTree t, List args) {
        if (!checkConformance(t, args)) {
            return Collections.emptyList();
        }

        List s = (List) params[0].transform(this, t, args.get(0));
        if (s == null) {
            return Collections.emptyList();
        }

        if (s.size() < 2) {
            t.ignoreError("Parameter '" + params[0].getName() + "' expects a list of at least 2 VMs");
            return Collections.emptyList();
        }
        return (List) Collections.singletonList(new Serialize(s));
    }
}




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