SingleTemporalCollection.java

package mf;

/*Generated by MPS */

import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.ArrayList;
import java.util.Collections;

public class SingleTemporalCollection implements TemporalCollection {
  private Map myContents = new HashMap();
  private List myMilestoneCache;
  public SingleTemporalCollection() {
  }
  @Override
  public Object get(MfDate when) {
    for (Object o : milestones()) {
      MfDate thisDate = (MfDate) o;
      if (thisDate.before(when) || thisDate.equals(when)) {
        return myContents.get(thisDate);
      }
    }
    throw new IllegalArgumentException("no records that early");
  }
  @Override
  public void put(MfDate at, Object item) {
    myContents.put(at, item);
    clearMilestoneCache();
  }
  private List milestones() {
    if (myMilestoneCache == null) {
      calculateMilestones();
    }
    return myMilestoneCache;
  }
  private void calculateMilestones() {
    myMilestoneCache = new ArrayList(myContents.size());
    myMilestoneCache.addAll(myContents.keySet());
    Collections.sort(myMilestoneCache, Collections.reverseOrder());
  }
  private void clearMilestoneCache() {
    myMilestoneCache = null;
  }
  @Override
  public Object get(int year, int month, int date) {
    return get(new MfDate(year, month, date));
  }
  @Override
  public Object get() {
    return get(MfDate.today());
  }
  @Override
  public void put(Object item) {
    put(MfDate.today(), item);
  }
  public TemporalCollection copy() {
    SingleTemporalCollection result = new SingleTemporalCollection();
    result.myContents.putAll(this.myContents);
    return result;
  }
}