/*******************************************************************************
 * Copyright (c) 2001, 2007 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.wsdl.internal.impl;


import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.wsdl.OperationType;

import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.NotificationChain;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.impl.ENotificationImpl;
import org.eclipse.emf.ecore.util.EObjectContainmentEList;
import org.eclipse.emf.ecore.util.EObjectResolvingEList;
import org.eclipse.emf.ecore.util.InternalEList;
import org.eclipse.wst.wsdl.Definition;
import org.eclipse.wst.wsdl.Fault;
import org.eclipse.wst.wsdl.Input;
import org.eclipse.wst.wsdl.Operation;
import org.eclipse.wst.wsdl.Output;
import org.eclipse.wst.wsdl.Part;
import org.eclipse.wst.wsdl.WSDLFactory;
import org.eclipse.wst.wsdl.WSDLPackage;
import org.eclipse.wst.wsdl.internal.util.WSDLUtil;
import org.eclipse.wst.wsdl.util.WSDLConstants;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;


/**
 * <!-- begin-user-doc -->
 * An implementation of the model object '<em><b>Operation</b></em>'.
 * <!-- end-user-doc -->
 * <p>
 * The following features are implemented:
 * <ul>
 *   <li>{@link org.eclipse.wst.wsdl.internal.impl.OperationImpl#getStyle <em>Style</em>}</li>
 *   <li>{@link org.eclipse.wst.wsdl.internal.impl.OperationImpl#getName <em>Name</em>}</li>
 *   <li>{@link org.eclipse.wst.wsdl.internal.impl.OperationImpl#isUndefined <em>Undefined</em>}</li>
 *   <li>{@link org.eclipse.wst.wsdl.internal.impl.OperationImpl#getEInput <em>EInput</em>}</li>
 *   <li>{@link org.eclipse.wst.wsdl.internal.impl.OperationImpl#getEOutput <em>EOutput</em>}</li>
 *   <li>{@link org.eclipse.wst.wsdl.internal.impl.OperationImpl#getEFaults <em>EFaults</em>}</li>
 *   <li>{@link org.eclipse.wst.wsdl.internal.impl.OperationImpl#getEParameterOrdering <em>EParameter Ordering</em>}</li>
 * </ul>
 * </p>
 *
 * @generated
 */
public class OperationImpl extends ExtensibleElementImpl implements Operation
{
  /**
   * This class is not intended to be serialized.
   * serialVersionUID is assigned with 1L to avoid
   * compiler warning messages.
   */
  private static final long serialVersionUID = 1L;

  /**
   * The default value of the '{@link #getStyle() <em>Style</em>}' attribute.
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @see #getStyle()
   * @generated
   * @ordered
   */
  protected static final OperationType STYLE_EDEFAULT = null;

  /**
   * The cached value of the '{@link #getStyle() <em>Style</em>}' attribute.
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @see #getStyle()
   * @generated
   * @ordered
   */
  protected OperationType style = STYLE_EDEFAULT;

  /**
   * The default value of the '{@link #getName() <em>Name</em>}' attribute.
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @see #getName()
   * @generated
   * @ordered
   */
  protected static final String NAME_EDEFAULT = null;

  /**
   * The cached value of the '{@link #getName() <em>Name</em>}' attribute.
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @see #getName()
   * @generated
   * @ordered
   */
  protected String name = NAME_EDEFAULT;

  /**
   * The default value of the '{@link #isUndefined() <em>Undefined</em>}' attribute.
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @see #isUndefined()
   * @generated
   * @ordered
   */
  protected static final boolean UNDEFINED_EDEFAULT = false;

  /**
   * The cached value of the '{@link #isUndefined() <em>Undefined</em>}' attribute.
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @see #isUndefined()
   * @generated
   * @ordered
   */
  protected boolean undefined = UNDEFINED_EDEFAULT;

  /**
   * The cached value of the '{@link #getEInput() <em>EInput</em>}' containment reference.
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @see #getEInput()
   * @generated
   * @ordered
   */
  protected Input eInput = null;

  /**
   * The cached value of the '{@link #getEOutput() <em>EOutput</em>}' containment reference.
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @see #getEOutput()
   * @generated
   * @ordered
   */
  protected Output eOutput = null;

  /**
   * The cached value of the '{@link #getEFaults() <em>EFaults</em>}' containment reference list.
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @see #getEFaults()
   * @generated
   * @ordered
   */
  protected EList eFaults = null;

  /**
   * The cached value of the '{@link #getEParameterOrdering() <em>EParameter Ordering</em>}' reference list.
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @see #getEParameterOrdering()
   * @generated
   * @ordered
   */
  protected EList eParameterOrdering = null; // a list of parts (EMF)

  private List parameterOrdering = null; // a list of part names (WSDL4J)

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  protected OperationImpl()
  {
    super();
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  protected EClass eStaticClass()
  {
    return WSDLPackage.Literals.OPERATION;
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated NOT
   */
  public OperationType getStyle()
  {
    if (style == null)
      style = deduceOperationType(getElement());

    // The value of style is updated when
    // 1) the WSDL is loaded for the first time,
    // 2) the setStyle() method is called, and
    // 3) the children of the Operation (DOM) element are manipulated.
    return style;
  }

  private OperationType deduceOperationType(Element operation)
  {
    if (operation == null)
      return null;

    int state = 0;
    int messageRefType = -1;
    Node child = null;
    NodeList children = operation.getChildNodes();

    for (int i = 0; i < children.getLength(); i++)
    {
      child = children.item(i);
      if (child.getNodeType() != Node.ELEMENT_NODE)
        continue;

      String nsURI = child.getNamespaceURI();

      if (!WSDLConstants.WSDL_NAMESPACE_URI.equals(nsURI))
      {
        // Skip over any non-WSDL elements. For example, to support new WSDL 
        // use cases we have to tolerate extensibility elements at the operation level.

        continue;
      }

      messageRefType = WSDLUtil.getInstance().getWSDLType((Element)child);

      switch (state)
      {
        case 0: // initial state     
        if (WSDLConstants.INPUT == messageRefType)
          state = 1;
        else if (WSDLConstants.OUTPUT == messageRefType)
          state = 2;
        else if (WSDLConstants.DOCUMENTATION == messageRefType)
          state = 0;
        else
          state = -1; // cannot happen
          break;
        case 1: // one-way or request-response
        if (WSDLConstants.FAULT == messageRefType)
          state = 11; // one-way
        else if (WSDLConstants.OUTPUT == messageRefType)
          state = 3; // request-response
        else
          state = -1; // cannot happen
          break;
        case 11: // one-way
        if (WSDLConstants.FAULT == messageRefType)
          state = 11; // one-way
        else
          state = -1; // cannot happen
          break;
        case 2: // solicit-response or notification
        if (WSDLConstants.INPUT == messageRefType)
          state = 4; // solicit-response
        else if (WSDLConstants.FAULT == messageRefType)
          state = 21; // notification
        else
          state = -1; // cannot happen
          break;
        case 21: // notification
        if (WSDLConstants.FAULT == messageRefType)
          state = 21; // notification
        else
          state = -1; // cannot happen
          break;
        case 3: // request-response 
        if (WSDLConstants.FAULT == messageRefType)
          state = 3;
        else
          state = -1; // cannot happen
          break;
        case 4: // solicit-response
        if (WSDLConstants.FAULT == messageRefType)
          state = 4;
        else
          state = -1; // cannot happen
          break;
        default: // cannot happen (-1)
        break;
    }
  }

  OperationType opType = null;
  switch (state)
  {
    case 1:
    case 11:
    opType = OperationType.ONE_WAY;
      break;
    case 2:
    case 21:
    opType = OperationType.NOTIFICATION;
      break;
    case 3:
    opType = OperationType.REQUEST_RESPONSE;
      break;
    case 4:
    opType = OperationType.SOLICIT_RESPONSE;
      break;
    default: // invalid
    break;
}
return opType;
}

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public void setStyle(OperationType newStyle)
  {
    OperationType oldStyle = style;
    style = newStyle;
    if (eNotificationRequired())
      eNotify(new ENotificationImpl(this, Notification.SET, WSDLPackage.OPERATION__STYLE, oldStyle, style));
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public String getName()
  {
    return name;
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public void setName(String newName)
  {
    String oldName = name;
    name = newName;
    if (eNotificationRequired())
      eNotify(new ENotificationImpl(this, Notification.SET, WSDLPackage.OPERATION__NAME, oldName, name));
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public boolean isUndefined()
  {
    return undefined;
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public void setUndefined(boolean newUndefined)
  {
    boolean oldUndefined = undefined;
    undefined = newUndefined;
    if (eNotificationRequired())
      eNotify(new ENotificationImpl(this, Notification.SET, WSDLPackage.OPERATION__UNDEFINED, oldUndefined, undefined));
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public Input getEInput()
  {
    return eInput;
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public NotificationChain basicSetEInput(Input newEInput, NotificationChain msgs)
  {
    Input oldEInput = eInput;
    eInput = newEInput;
    if (eNotificationRequired())
    {
      ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, WSDLPackage.OPERATION__EINPUT, oldEInput, newEInput);
      if (msgs == null)
        msgs = notification;
      else
        msgs.add(notification);
    }
    return msgs;
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public void setEInput(Input newEInput)
  {
    if (newEInput != eInput)
    {
      NotificationChain msgs = null;
      if (eInput != null)
        msgs = ((InternalEObject)eInput).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - WSDLPackage.OPERATION__EINPUT, null, msgs);
      if (newEInput != null)
        msgs = ((InternalEObject)newEInput).eInverseAdd(this, EOPPOSITE_FEATURE_BASE - WSDLPackage.OPERATION__EINPUT, null, msgs);
      msgs = basicSetEInput(newEInput, msgs);
      if (msgs != null)
        msgs.dispatch();
    }
    else if (eNotificationRequired())
      eNotify(new ENotificationImpl(this, Notification.SET, WSDLPackage.OPERATION__EINPUT, newEInput, newEInput));
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public Output getEOutput()
  {
    return eOutput;
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public NotificationChain basicSetEOutput(Output newEOutput, NotificationChain msgs)
  {
    Output oldEOutput = eOutput;
    eOutput = newEOutput;
    if (eNotificationRequired())
    {
      ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, WSDLPackage.OPERATION__EOUTPUT, oldEOutput, newEOutput);
      if (msgs == null)
        msgs = notification;
      else
        msgs.add(notification);
    }
    return msgs;
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public void setEOutput(Output newEOutput)
  {
    if (newEOutput != eOutput)
    {
      NotificationChain msgs = null;
      if (eOutput != null)
        msgs = ((InternalEObject)eOutput).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - WSDLPackage.OPERATION__EOUTPUT, null, msgs);
      if (newEOutput != null)
        msgs = ((InternalEObject)newEOutput).eInverseAdd(this, EOPPOSITE_FEATURE_BASE - WSDLPackage.OPERATION__EOUTPUT, null, msgs);
      msgs = basicSetEOutput(newEOutput, msgs);
      if (msgs != null)
        msgs.dispatch();
    }
    else if (eNotificationRequired())
      eNotify(new ENotificationImpl(this, Notification.SET, WSDLPackage.OPERATION__EOUTPUT, newEOutput, newEOutput));
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public EList getEFaults()
  {
    if (eFaults == null)
    {
      eFaults = new EObjectContainmentEList(Fault.class, this, WSDLPackage.OPERATION__EFAULTS);
    }
    return eFaults;
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public EList getEParameterOrdering()
  {
    if (eParameterOrdering == null)
    {
      eParameterOrdering = new EObjectResolvingEList(Part.class, this, WSDLPackage.OPERATION__EPARAMETER_ORDERING);
    }
    return eParameterOrdering;
  }

  /**
   * <!-- begin-user-doc -->
   * Add a fault message that must be associated with this
   * operation.
   * @param fault the new fault message
   * <!-- end-user-doc -->
   * @generated NOT
   */
  public void addFault(javax.wsdl.Fault fault)
  {
    getEFaults().add((Fault)fault);
  }

  /**
   * <!-- begin-user-doc -->
   * Get the specified fault message.
   * @param name the name of the desired fault message.
   * @return the corresponding fault message, or null if there wasn't
   * any matching message
   * <!-- end-user-doc -->
   * @generated NOT
   */
  public javax.wsdl.Fault getFault(String name)
  {
    Fault result = null;
    for (Iterator i = getEFaults().iterator(); i.hasNext();)
    {
      Fault fault = (Fault)i.next();
      if (name.equals(fault.getName()))
      {
        result = fault;
        break;
      }
    }
    return result;
  }

  /**
   * <!-- begin-user-doc -->
   * Get all the fault messages associated with this operation.
   * @return names of fault messages
   * <!-- end-user-doc -->
   * @generated NOT
   */
  public Map getFaults()
  {
    HashMap hashMap = new HashMap();
    for (Iterator i = getEFaults().iterator(); i.hasNext();)
    {
      Fault fault = (Fault)i.next();
      hashMap.put(fault.getName(), fault);
    }
    return hashMap;
  }

  /**
   * <!-- begin-user-doc -->
   * Returns a collection of Part names. Note that 
   * getParameterEOrdering() returns a collection of Parts.
   * <!-- end-user-doc -->
   * @generated NOT
   */
  public List getParameterOrdering()
  {
    parameterOrdering = new ArrayList();
    for (Iterator i = getEParameterOrdering().iterator(); i.hasNext();)
    {
      try
      {
        Part part = (Part)i.next();
        parameterOrdering.add(part.getName());
      }
      catch (Exception e)
      {
        // TBD - handle exception
      }
    }
    return parameterOrdering.isEmpty() ? null : parameterOrdering;
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated NOT
   */
  public void setParameterOrdering(List parameterOrder)
  {
    parameterOrdering = parameterOrder;
    getEParameterOrdering().clear();
    if (parameterOrder != null)
    {
      for (Iterator i = parameterOrder.iterator(); i.hasNext();)
      {
        // KB: We should be resolving parts based on the part names in parameterOrder.
        Part part = WSDLFactory.eINSTANCE.createPart();
        part.setName((String)i.next());
        getEParameterOrdering().add(part);
      }
    }
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated NOT
   */
  public javax.wsdl.Input getInput()
  {
    return getEInput();
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated NOT
   */
  public void setInput(javax.wsdl.Input input)
  {
    setEInput((Input)input);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated NOT
   */
  public javax.wsdl.Output getOutput()
  {
    return getEOutput();
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated NOT
   */
  public void setOutput(javax.wsdl.Output output)
  {
    setEOutput((Output)output);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public NotificationChain eInverseRemove(InternalEObject otherEnd, int featureID, NotificationChain msgs)
  {
    switch (featureID)
    {
      case WSDLPackage.OPERATION__EINPUT:
      return basicSetEInput(null, msgs);
      case WSDLPackage.OPERATION__EOUTPUT:
      return basicSetEOutput(null, msgs);
      case WSDLPackage.OPERATION__EFAULTS:
      return ((InternalEList)getEFaults()).basicRemove(otherEnd, msgs);
    }
    return super.eInverseRemove(otherEnd, featureID, msgs);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public Object eGet(int featureID, boolean resolve, boolean coreType)
  {
    switch (featureID)
    {
      case WSDLPackage.OPERATION__STYLE:
      return getStyle();
      case WSDLPackage.OPERATION__NAME:
      return getName();
      case WSDLPackage.OPERATION__UNDEFINED:
      return isUndefined() ? Boolean.TRUE : Boolean.FALSE;
      case WSDLPackage.OPERATION__EINPUT:
      return getEInput();
      case WSDLPackage.OPERATION__EOUTPUT:
      return getEOutput();
      case WSDLPackage.OPERATION__EFAULTS:
      return getEFaults();
      case WSDLPackage.OPERATION__EPARAMETER_ORDERING:
      return getEParameterOrdering();
    }
    return super.eGet(featureID, resolve, coreType);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public void eSet(int featureID, Object newValue)
  {
    switch (featureID)
    {
      case WSDLPackage.OPERATION__STYLE:
      setStyle((OperationType)newValue);
      return;
      case WSDLPackage.OPERATION__NAME:
      setName((String)newValue);
      return;
      case WSDLPackage.OPERATION__UNDEFINED:
      setUndefined(((Boolean)newValue).booleanValue());
      return;
      case WSDLPackage.OPERATION__EINPUT:
      setEInput((Input)newValue);
      return;
      case WSDLPackage.OPERATION__EOUTPUT:
      setEOutput((Output)newValue);
      return;
      case WSDLPackage.OPERATION__EFAULTS:
      getEFaults().clear();
      getEFaults().addAll((Collection)newValue);
      return;
      case WSDLPackage.OPERATION__EPARAMETER_ORDERING:
      getEParameterOrdering().clear();
      getEParameterOrdering().addAll((Collection)newValue);
      return;
    }
    super.eSet(featureID, newValue);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public void eUnset(int featureID)
  {
    switch (featureID)
    {
      case WSDLPackage.OPERATION__STYLE:
      setStyle(STYLE_EDEFAULT);
      return;
      case WSDLPackage.OPERATION__NAME:
      setName(NAME_EDEFAULT);
      return;
      case WSDLPackage.OPERATION__UNDEFINED:
      setUndefined(UNDEFINED_EDEFAULT);
      return;
      case WSDLPackage.OPERATION__EINPUT:
      setEInput((Input)null);
      return;
      case WSDLPackage.OPERATION__EOUTPUT:
      setEOutput((Output)null);
      return;
      case WSDLPackage.OPERATION__EFAULTS:
      getEFaults().clear();
      return;
      case WSDLPackage.OPERATION__EPARAMETER_ORDERING:
      getEParameterOrdering().clear();
      return;
    }
    super.eUnset(featureID);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public boolean eIsSet(int featureID)
  {
    switch (featureID)
    {
      case WSDLPackage.OPERATION__STYLE:
      return STYLE_EDEFAULT == null ? style != null : !STYLE_EDEFAULT.equals(style);
      case WSDLPackage.OPERATION__NAME:
      return NAME_EDEFAULT == null ? name != null : !NAME_EDEFAULT.equals(name);
      case WSDLPackage.OPERATION__UNDEFINED:
      return undefined != UNDEFINED_EDEFAULT;
      case WSDLPackage.OPERATION__EINPUT:
      return eInput != null;
      case WSDLPackage.OPERATION__EOUTPUT:
      return eOutput != null;
      case WSDLPackage.OPERATION__EFAULTS:
      return eFaults != null && !eFaults.isEmpty();
      case WSDLPackage.OPERATION__EPARAMETER_ORDERING:
      return eParameterOrdering != null && !eParameterOrdering.isEmpty();
    }
    return super.eIsSet(featureID);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public String toString()
  {
    if (eIsProxy())
      return super.toString();

    StringBuffer result = new StringBuffer(super.toString());
    result.append(" (style: "); //$NON-NLS-1$
    result.append(style);
    result.append(", name: "); //$NON-NLS-1$
    result.append(name);
    result.append(", undefined: "); //$NON-NLS-1$
    result.append(undefined);
    result.append(')');
    return result.toString();
  }

  // 
  // Reconcile methods
  //

  public void reconcileAttributes(Element changedElement)
  {
    if (changedElement.hasAttribute(WSDLConstants.NAME_ATTRIBUTE))
    {
      String name = changedElement.getAttribute(WSDLConstants.NAME_ATTRIBUTE);
      if (name != null)
      {
        setName(name);
      }
    }

    if (changedElement.hasAttribute(WSDLConstants.PARAMETER_ORDER_ATTRIBUTE))
    {
      String parameterOrder = changedElement.getAttribute(WSDLConstants.PARAMETER_ORDER_ATTRIBUTE);
      if (parameterOrder != null)
      {
        String[] array = parameterOrder.split(" ");
        List l = Arrays.asList(array);
        setParameterOrdering(l);
      }
    }

  }

  public void elementChanged(Element changedElement)
  {
    style = deduceOperationType(changedElement);
    super.elementChanged(changedElement);
  }

  public void handleUnreconciledElement(Element child, Collection remainingModelObjects)
  {
    Definition definition = getEnclosingDefinition();

    switch (WSDLUtil.getInstance().getWSDLType(child))
    {
      case WSDLConstants.INPUT:
      {
        Input input = WSDLFactory.eINSTANCE.createInput();
        input.setEnclosingDefinition(definition);
        input.setElement(child);
        setInput(input);
        break;
      }
      case WSDLConstants.OUTPUT:
      {
        Output output = WSDLFactory.eINSTANCE.createOutput();
        output.setEnclosingDefinition(definition);
        output.setElement(child);
        setOutput(output);
        break;
      }
      case WSDLConstants.FAULT:
      {
        Fault fault = WSDLFactory.eINSTANCE.createFault();
        fault.setEnclosingDefinition(definition);
        fault.setElement(child);
        addFault(fault);
        break;
      }
      default:
      {
        super.handleUnreconciledElement(child, remainingModelObjects);
        break;
      }
    }
  }

  protected void handleReconciliation(Collection remainingModelObjects)
  {
    for (Iterator i = remainingModelObjects.iterator(); i.hasNext();)
    {
      remove(this, i.next());
    }
  }

  protected void remove(Object component, Object modelObject)
  {
    Operation operation = (Operation)component;
    if (modelObject instanceof Input)
    {
      operation.setEInput(null);
    }
    else if (modelObject instanceof Output)
    {
      operation.setEOutput(null);
    }
    else if (modelObject instanceof Fault)
    {
      operation.getEFaults().remove(modelObject);
    }
  }

  public Collection getModelObjects(Object component)
  {
    Operation operation = (Operation)component;

    List list = new ArrayList();

    if (operation.getEInput() != null)
    {
      list.add(operation.getEInput());
    }

    if (operation.getEOutput() != null)
    {
      list.add(operation.getEOutput());
    }

    list.addAll(operation.getEFaults());

    return list;
  }

  //
  // For reconciliation: Model -> DOM
  //

  protected void changeAttribute(EAttribute eAttribute)
  {
    if (isReconciling)
      return;

    super.changeAttribute(eAttribute);
    Element theElement = getElement();
    if (theElement != null)
    {
      if (eAttribute == null || eAttribute == WSDLPackage.eINSTANCE.getOperation_Name())
        niceSetAttribute(theElement, WSDLConstants.NAME_ATTRIBUTE, getName());
      if (eAttribute == WSDLPackage.eINSTANCE.getOperation_Style())
      {
        OperationType targetType = getStyle();
        OperationType currentType = deduceOperationType(theElement);
        if (targetType.equals(currentType))
          return;
        else if ((targetType.equals(OperationType.REQUEST_RESPONSE) || targetType.equals(OperationType.SOLICIT_RESPONSE))
          && (currentType.equals(OperationType.REQUEST_RESPONSE) || currentType.equals(OperationType.SOLICIT_RESPONSE)))
          reorderChildren();
        else
          style = deduceOperationType(theElement); // switch back. no support for the other types
      }
    }
  }

  protected void changeReference(EReference eReference)
  {
    if (isReconciling)
      return;

    super.changeReference(eReference);
    Element theElement = getElement();
    if (theElement != null)
    {
      if (eReference == null || eReference == WSDLPackage.eINSTANCE.getOperation_EParameterOrdering())
      {
        // Build up a string of concatenated part names (parameterOrder) from eParameterOrdering.

        Iterator parts = getEParameterOrdering().iterator();
        Part part = null;
        String partNames = "";
        while (parts.hasNext())
        {
          part = (Part)parts.next();
          partNames = partNames + part.getName() + " ";
        }

        if ((partNames = partNames.trim()).length() != 0)
          // Update the element's attrubute
          niceSetAttribute(theElement, WSDLConstants.PARAMETER_ORDER_ATTRIBUTE, partNames);
      }
    }
    //
  }

  // Switch <input> and <output>
  private void reorderChildren()
  {
    // Find out the positions of <input> and <output>
    Node input = null;
    Node output = null;
    Node reference = null;
    for (Node current = getElement().getFirstChild(); current != null; current = current.getNextSibling())
    {
      if (current.getNodeType() == Node.ELEMENT_NODE)
      {
        if (WSDLConstants.INPUT == WSDLUtil.getInstance().getWSDLType((Element)current))
        {
          input = current;
          if (output != null)
          {
            // cs.. for safety use current.getNextSibling() instead of nodeList.item(i+1)            
            reference = current.getNextSibling();
          }
        }
        else if (WSDLConstants.OUTPUT == WSDLUtil.getInstance().getWSDLType((Element)current))
        {
          output = current;
          if (input != null)
          {
            // cs.. for safety use current.getNextSibling() instead of nodeList.item(i+1)            
            reference = current.getNextSibling();
          }
        }
      }
    } // end for

    if (input != null && output != null)
    {
      Element parent = getElement();
      if (getStyle().equals(OperationType.REQUEST_RESPONSE))
      {
        // current order: <output> <input>
        switchChildren(parent, output, input, reference);
      }
      else if (getStyle().equals(OperationType.SOLICIT_RESPONSE))
      {
        // current order: <input> <output>
        switchChildren(parent, input, output, reference);
      }
    }
  }

  private void switchChildren(Node parent, Node child1, Node child2, Node nextOfChild2)
  {
    // current node sequence: <child1> <child2> <nextOfChild2>
    niceRemoveChild(parent, child2);
    niceInsertBefore(parent, child2, child1);
    niceRemoveChild(parent, child1);
    niceInsertBefore(parent, child1, nextOfChild2);
  }

  public Element createElement()
  {
    Element newElement = createElement(WSDLConstants.OPERATION);
    setElement(newElement);

    Input input = getEInput();
    if (input != null)
    {
      Element child = ((InputImpl)input).createElement();
      newElement.appendChild(child);
    }

    Output output = getEOutput();
    if (output != null)
    {
      Element child = ((OutputImpl)output).createElement();
      newElement.appendChild(child);
    }

    Iterator iterator = getEFaults().iterator();
    while (iterator.hasNext())
    {
      Fault fault = (Fault)iterator.next();
      Element child = ((FaultImpl)fault).createElement();
      newElement.appendChild(child);
    }

    return newElement;
  }

} //OperationImpl