/*******************************************************************************
 * Copyright (c) 2001, 2004 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 javax.xml.namespace.QName;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.NotificationChain;
import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.impl.ENotificationImpl;
import org.eclipse.wst.wsdl.Definition;
import org.eclipse.wst.wsdl.WSDLPackage;
import org.eclipse.wst.wsdl.XSDSchemaExtensibilityElement;
import org.eclipse.xsd.XSDFactory;
import org.eclipse.xsd.XSDSchema;
import org.eclipse.xsd.impl.XSDSchemaImpl;
import org.eclipse.xsd.util.XSDConstants;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

/**
 * <!-- begin-user-doc -->
 * An implementation of the model object '<em><b>XSD Schema Extensibility Element</b></em>'.
 * <!-- end-user-doc -->
 * <p>
 * The following features are implemented:
 * <ul>
 *   <li>{@link org.eclipse.wsdl.impl.XSDSchemaExtensibilityElementImpl#getSchema <em>Schema</em>}</li>
 * </ul>
 * </p>
 *
 * @generated
 */
public class XSDSchemaExtensibilityElementImpl extends ExtensibilityElementImpl implements XSDSchemaExtensibilityElement
{
  /**
   * The cached value of the '{@link #getSchema() <em>Schema</em>}' containment reference.
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @see #getSchema()
   * @generated
   * @ordered
   */
  protected XSDSchema schema = null;

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

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

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public XSDSchema getSchema()
  {
    return schema;
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public NotificationChain basicSetSchema(XSDSchema newSchema, NotificationChain msgs)
  {
    XSDSchema oldSchema = schema;
    schema = newSchema;
    if (eNotificationRequired())
    {
      ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__SCHEMA, oldSchema, newSchema);
      if (msgs == null) msgs = notification; else msgs.add(notification);
    }
    return msgs;
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public void setSchema(XSDSchema newSchema)
  {
    if (newSchema != schema)
    {
      NotificationChain msgs = null;
      if (schema != null)
        msgs = ((InternalEObject)schema).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__SCHEMA, null, msgs);
      if (newSchema != null)
        msgs = ((InternalEObject)newSchema).eInverseAdd(this, EOPPOSITE_FEATURE_BASE - WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__SCHEMA, null, msgs);
      msgs = basicSetSchema(newSchema, msgs);
      if (msgs != null) msgs.dispatch();
    }
    else if (eNotificationRequired())
      eNotify(new ENotificationImpl(this, Notification.SET, WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__SCHEMA, newSchema, newSchema));
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public NotificationChain eInverseRemove(InternalEObject otherEnd, int featureID, Class baseClass, NotificationChain msgs)
  {
    if (featureID >= 0)
    {
      switch (eDerivedStructuralFeatureID(featureID, baseClass))
      {
        case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__SCHEMA:
          return basicSetSchema(null, msgs);
        default:
          return eDynamicInverseRemove(otherEnd, featureID, baseClass, msgs);
      }
    }
    return eBasicSetContainer(null, featureID, msgs);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public Object eGet(EStructuralFeature eFeature, boolean resolve)
  {
    switch (eDerivedStructuralFeatureID(eFeature))
    {
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__DOCUMENTATION_ELEMENT:
        return getDocumentationElement();
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__ELEMENT:
        return getElement();
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__REQUIRED:
        return isRequired() ? Boolean.TRUE : Boolean.FALSE;
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__ELEMENT_TYPE:
        return getElementType();
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__SCHEMA:
        return getSchema();
    }
    return eDynamicGet(eFeature, resolve);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public void eSet(EStructuralFeature eFeature, Object newValue)
  {
    switch (eDerivedStructuralFeatureID(eFeature))
    {
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__DOCUMENTATION_ELEMENT:
        setDocumentationElement((Element)newValue);
        return;
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__ELEMENT:
        setElement((Element)newValue);
        return;
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__REQUIRED:
        setRequired(((Boolean)newValue).booleanValue());
        return;
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__ELEMENT_TYPE:
        setElementType((QName)newValue);
        return;
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__SCHEMA:
        setSchema((XSDSchema)newValue);
        return;
    }
    eDynamicSet(eFeature, newValue);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public void eUnset(EStructuralFeature eFeature)
  {
    switch (eDerivedStructuralFeatureID(eFeature))
    {
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__DOCUMENTATION_ELEMENT:
        setDocumentationElement(DOCUMENTATION_ELEMENT_EDEFAULT);
        return;
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__ELEMENT:
        setElement(ELEMENT_EDEFAULT);
        return;
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__REQUIRED:
        setRequired(REQUIRED_EDEFAULT);
        return;
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__ELEMENT_TYPE:
        setElementType(ELEMENT_TYPE_EDEFAULT);
        return;
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__SCHEMA:
        setSchema((XSDSchema)null);
        return;
    }
    eDynamicUnset(eFeature);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public boolean eIsSet(EStructuralFeature eFeature)
  {
    switch (eDerivedStructuralFeatureID(eFeature))
    {
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__DOCUMENTATION_ELEMENT:
        return DOCUMENTATION_ELEMENT_EDEFAULT == null ? documentationElement != null : !DOCUMENTATION_ELEMENT_EDEFAULT.equals(documentationElement);
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__ELEMENT:
        return ELEMENT_EDEFAULT == null ? element != null : !ELEMENT_EDEFAULT.equals(element);
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__REQUIRED:
        return required != REQUIRED_EDEFAULT;
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__ELEMENT_TYPE:
        return ELEMENT_TYPE_EDEFAULT == null ? elementType != null : !ELEMENT_TYPE_EDEFAULT.equals(elementType);
      case WSDLPackage.XSD_SCHEMA_EXTENSIBILITY_ELEMENT__SCHEMA:
        return schema != null;
    }
    return eDynamicIsSet(eFeature);
  }

  /* (non-Javadoc)
   * @see org.eclipse.wsdl.impl.WSDLElementImpl#reconcile(org.w3c.dom.Element)
   */
  protected void reconcile(Element changedElement)
  {
    element = changedElement; // This line may not needed.    
    if (schema == null)
    {
      XSDSchema newSchema = XSDSchemaImpl.createSchema(changedElement);
      setSchema(newSchema);
    }
  }

  public XSDSchema createSchema(Element element)
  {
    if (element.getLocalName().equals("schema") && XSDConstants.isSchemaForSchemaNamespace(element.getNamespaceURI()))
    {     
      XSDSchema xsdSchema = XSDFactory.eINSTANCE.createXSDSchema(); 
      xsdSchema.setElement(element);
      return xsdSchema;      
    }
    else
    {
      return null;
    }
  }

  public Element getElement()
  {
    if (element != null)
      return element;
    else if (getSchema() != null)
      element = getSchema().getElement();

    return element;
  }
  
  public void setElement(Element newElement)
  {
    if (newElement == null && !isReconciling)
    {
      element = null;
    }
    else
    {
      setElementGen(newElement);
    }
  }
  
  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated NOT
   */
  public QName getElementType()
  {
    if (elementType == null)
      elementType = new QName(XSDConstants.SCHEMA_FOR_SCHEMA_URI_2001,XSDConstants.SCHEMA_ELEMENT_TAG);

    return elementType;
  }
  
  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated NOT
   */
  public void setElementType(QName newElementType)
  {
    // Should not do anything.
  }  
  
  public void reconcileAttributes(Element changedElement)
  {
    super.reconcileAttributes(changedElement);
  }
  
  public Element createElement()
  {
  	if (schema == null) // kb Note: This case is not supposed to happen.
  	{     
  	  // cs ... why do we do this if its not supposed to happen?
  	  // Is there a scenario where this is a usefull fallback?
  	  // Under what conditions does this code get executed (i.e. why would schema == null)?
      schema = XSDFactory.eINSTANCE.createXSDSchema();
      schema.setSchemaForSchemaQNamePrefix("xsd");
      schema.setTargetNamespace("http://tempuri.org/");
      java.util.Map qNamePrefixToNamespaceMap = schema.getQNamePrefixToNamespaceMap();
      qNamePrefixToNamespaceMap.put("", schema.getTargetNamespace());
      qNamePrefixToNamespaceMap.put
        (schema.getSchemaForSchemaQNamePrefix(),org.eclipse.xsd.util.XSDConstants.SCHEMA_FOR_SCHEMA_URI_2001);
      adopt(schema);
      schema.updateElement(true);
      return schema.getElement();
    }
    else
    {
      element = schema.getElement();
      if (element == null)
      {
      	adopt(schema);
        schema.updateElement(true);
      }
      element = schema.getElement();
      return element;
    }
  }
 
  private void adopt(XSDSchema xsdSchema)
  {
    Definition definition = getEnclosingDefinition();
    if (definition == null)
      return;

    Document document = definition.getDocument();
    if (document == null)
      document = ((DefinitionImpl) definition).updateDocument();
    
    if (xsdSchema.getDocument() != null)
    	xsdSchema.setDocument(null);
    
    xsdSchema.setDocument(document);
  }
  
  /*
  private Element adopt(Element element)
  {
    Definition definition = getEnclosingDefinition();
    if (definition == null)
      return element;

    Document document = definition.getDocument();
    if (document == null)
      document = ((DefinitionImpl) definition).updateDocument();
    
    return (Element)document.importNode(element,true);
  }
  */
  
  protected void changeAttribute(EAttribute eAttribute)
  {
	  if (isReconciling)
		  return;
	  
	  // TODO... revist this block of code
	  //
	  if (eAttribute == null || eAttribute == WSDLPackage.eINSTANCE.getXSDSchemaExtensibilityElement_Schema())
	  {
		  // We got a new schema so re-parent it.
		  // cs... are we really doing the right thing here?  this seems strange
		  if (schema != null)
		  {
			  if ((schema.getElement() == null && getElement() == null) ||
					  (schema.getElement() != getElement()))
			  {	
				  schema.setDocument(null);
				  schema.setElement(null);
				  adopt(schema);
				  schema.updateElement();
			  }  
		  }
	  }    
	  else if (eAttribute == WSDLPackage.eINSTANCE.getWSDLElement_Element())
	  {
		  setSchema(createSchema(element)); // element is not null
	  }    
  }
} //XSDSchemaExtensibilityElementImpl