/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.mappingsmodel.schema;
import java.util.Iterator;
import org.apache.xerces.xs.XSObject;
import org.eclipse.persistence.tools.workbench.mappingsmodel.MWModel;
import org.eclipse.persistence.tools.workbench.mappingsmodel.handles.QName;
import org.eclipse.persistence.tools.workbench.utility.iterators.NullIterator;
public abstract class AbstractSchemaModel
extends MWModel
implements MWSchemaModel
{
// **************** Variables *********************************************
/** Used to prevent infinite loops in reload cycle */
private boolean reloadInProgress;
// **************** Constructors ******************************************
/** Default Constructor - Toplink Use Only */
protected AbstractSchemaModel() {
super();
}
AbstractSchemaModel(MWModel parent) {
super(parent);
}
// **************** Public ************************************************
/**
* Do NOT override this method.
* Every schema model object (except Namespace) should have a schema model parent.
*/
public final AbstractSchemaModel getSchemaModelParent() {
//use instanceof instead of catching ClassCastException
//for performance reasons while importing a schema
if (getParent() instanceof AbstractSchemaModel) {
return (AbstractSchemaModel) this.getParent();
}
return null;
}
// **************** MWSchemaModel contract ********************************
/**
* Do NOT override this method.
* Every schema object should be able to return its schema.
*/
public final MWXmlSchema getSchema() {
return this.getParentNamespace().getSchema();
}
/**
* Do NOT override this method.
* Every schema object should be able to return its parent namespace.
*/
public final MWNamespace getParentNamespace() {
if (this.getSchemaModelParent() == null) {
try {
return (MWNamespace) this.getParent();
} catch (ClassCastException ex) {
throw new IllegalStateException("This object is missing a parent namespace: " + this.toString());
}
} else {
return this.getSchemaModelParent().getParentNamespace();
}
}
/** default implementation */
public Iterator structuralComponents() {
return NullIterator.instance();
}
/** default implementation */
public Iterator descriptorContextComponents() {
return NullIterator.instance();
}
/** default implementation */
public Iterator xpathComponents() {
return NullIterator.instance();
}
public MWNamedSchemaComponent parentNamedComponent() {
MWSchemaModel parent = this.getSchemaModelParent();
if (parent == null) {
return null;
}
else {
MWNamedSchemaComponent namedParent;
try {
namedParent = (MWNamedSchemaComponent) parent;
}
catch (ClassCastException cce) {
return parent.parentNamedComponent();
}
return (namedParent.getName() == null) ? namedParent.parentNamedComponent() : namedParent;
}
}
MWXpathableSchemaComponent parentXPathableComponent() {
try {
return (MWXpathableSchemaComponent) this.parentNamedComponent();
}
catch (ClassCastException cce) {
return null;
}
}
/** default implementation */
public MWNamedSchemaComponent nestedNamedComponent(QName qName) {
if (qName.getComponentType() == QName.ATTRIBUTE_TYPE) {
return this.nestedAttribute(qName.getNamespaceURI(), qName.getLocalName());
}
else if (qName.getComponentType() == QName.ELEMENT_TYPE) {
return this.nestedElement(qName.getNamespaceURI(), qName.getLocalName());
}
else {
return null;
}
}
/** default implementation */
public MWAttributeDeclaration nestedAttribute(String namespaceUrl, String attributeName) {
return null;
}
/** default implementation */
public MWElementDeclaration nestedElement(String namespaceUrl, String elementName) {
return null;
}
/** default implementation */
public int totalElementCount() {
return 0;
}
// **************** SchemaModel contract **********************************
public final void reload(XSObject schemaObject) {
if (this.reloadInProgress) {
return;
}
this.reloadInProgress = true;
this.reloadInternal(schemaObject);
this.reloadInProgress = false;
this.fireStateChanged();
}
protected void reloadInternal(XSObject schemaObject) {
// subclasses must call super.reloadInternal(XSDNode)
// no op
}
public void resolveReferences() {
// subclasses must call super.resolveReferences()
// no op
}
}