ASIMessageHelper.java

/*
 * ASIMessageHelper.java
 *
 * Created on February 27, 2003, 11:11 AM
 */
package cern.laser.source.alarmsysteminterface.impl;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;

import cern.laser.source.alarmsysteminterface.FaultState;
import cern.laser.source.alarmsysteminterface.impl.message.ASIMessage;
import cern.laser.source.alarmsysteminterface.impl.message.FaultStates;


/**
 * Helper class for marshaling/unmarshaling to/from ASIMessage instances and FaultState instances collection.
 *
 * @author  fracalde
 */
public class ASIMessageHelper {
  /** Creates a new instance of ASIMessageHelper */
  private ASIMessageHelper() {
  }

  /**
   * DOCUMENT ME!
   *
   * @param states DOCUMENT ME!
   *
   * @return DOCUMENT ME!
   */
  public static ASIMessage marshal(Collection states) {
    if (states == null) {
      throw (new IllegalArgumentException("states collection is null"));
    }

    ASIMessage asi_message = new ASIMessage();
    Iterator iterator = states.iterator();
    FaultStates fault_states = new FaultStates();

    while (iterator.hasNext()) {
      Object ref = iterator.next();

      if (ref instanceof FaultState) {
        fault_states.addFaultState(FaultStateHelper.marshal((FaultState) ref));
      } else {
        throw new IllegalArgumentException("collection does not contain FaultState instances");
      }
    }

    asi_message.setFaultStates(fault_states);

    return asi_message;
  }

	/**
	 * DOCUMENT ME!
	 * 
	 * @param asiMessage
	 *            DOCUMENT ME!
	 * 
	 * @return DOCUMENT ME!
	 */
	public static Collection<FaultState> unmarshal(ASIMessage asiMessage) {
		if (asiMessage == null) {
			throw (new IllegalArgumentException("ASI message is null"));
		}
		Collection<FaultState> ret = new ArrayList<FaultState>();
		
		FaultStates generated_states = asiMessage.getFaultStates();
		
		if (generated_states != null) {
			for (cern.laser.source.alarmsysteminterface.impl.message.FaultState generated_state : generated_states.getFaultState()) {
				ret.add(FaultStateHelper.unmarshal(generated_state));
			}
		}

		return ret;
	}
}