001    /*
002     *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003     *
004     *  This file is licensed to You under the Eclipse Public License (EPL);
005     *  You may not use this file except in compliance with the License. You
006     *  may obtain a copy of the License at
007     *
008     *      http://www.opensource.org/licenses/eclipse-1.0.php
009     *
010     *  See the COPYRIGHT.txt file distributed with this work for information
011     *  regarding copyright ownership.
012     */
013    package org.mmtk.utility.options;
014    
015    import org.mmtk.plan.Plan;
016    
017    /**
018     * Provide an lower and upper bound on nursery size.<p>
019     *
020     * This option is not intended to be created directly, but via NurserySize.
021     */
022    public final class FixedNursery extends org.vmutil.options.PagesOption {
023      // values
024      BoundedNursery boundedNursery;
025    
026      /**
027       * Create the option
028       */
029      public FixedNursery(BoundedNursery boundedNursery) {
030        super(Options.set, "Fixed Nursery",
031            "Fix the minimum and maximum size of the nursery to this value",
032            Plan.DEFAULT_MIN_NURSERY);
033        this.boundedNursery = boundedNursery;
034      }
035    
036      /**
037       * Nursery can not be empty.
038       */
039      @Override
040      protected void validate() {
041        failIf(value <= 0, "Can not have an empty nursery");
042        // Update upper bound.
043        boundedNursery.setBytes(this.getBytes());
044      }
045    }