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/*******************************************************************************
* Copyright (c) 2006, 2008 Oracle. 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:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.core.resource.common;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Map;
import java.util.Set;
import org.eclipse.core.resources.IResource;
import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.Notifier;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.impl.EObjectImpl;
import org.eclipse.jpt.core.utility.AbstractTextRange;
import org.eclipse.jpt.core.utility.TextRange;
import org.eclipse.jpt.utility.internal.ClassTools;
import org.eclipse.wst.common.internal.emf.resource.EMF2DOMAdapter;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMElement;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMNode;
import org.w3c.dom.Node;
/**
* <!-- begin-user-doc -->
* A representation of the model object '<em><b>Xml EObject</b></em>'.
*
* Provisional API: This interface is part of an interim API that is still
* under development and expected to change significantly before reaching
* stability. It is available at this early stage to solicit feedback from
* pioneering adopters on the understanding that any code that uses this API
* will almost certainly be broken (repeatedly) as the API evolves.
* <!-- end-user-doc -->
*
*
* @see org.eclipse.jpt.core.resource.common.CommonPackage#getXmlEObject()
* @model kind="class" abstract="true"
* @generated
*/
public abstract class AbstractJpaEObject extends EObjectImpl implements JpaEObject
{
protected IDOMNode node;
/**
* Sets of "insignificant" feature ids, keyed by class.
* This is built up lazily, as the objects are modified.
*/
private static final Map<Class<? extends AbstractJpaEObject>, Set<Integer>> insignificantFeatureIdSets = new Hashtable<Class<? extends AbstractJpaEObject>, Set<Integer>>();
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
protected AbstractJpaEObject() {
super();
}
// **************** IJpaEObject implementation *****************************
public IResource getPlatformResource() {
return getResource().getFile();
}
public JpaXmlResource getResource() {
return (JpaXmlResource) eResource();
}
/*
* Must be overridden by actual root object to return itself
*/
public JpaEObject getRoot() {
return ((JpaEObject) eContainer()).getRoot();
}
// **************** change notification ************************************
/**
* override to prevent notification when the object's state is unchanged
*/
@Override
public void eNotify(Notification notification) {
if (!notification.isTouch()) {
super.eNotify(notification);
this.featureChanged(notification.getFeatureID(this.getClass()));
}
}
protected void featureChanged(int featureId) {
if (this.featureIsSignificant(featureId)) {
getResource().resourceChanged();
}
}
protected boolean featureIsSignificant(int featureId) {
return ! this.featureIsInsignificant(featureId);
}
protected boolean featureIsInsignificant(int featureId) {
return this.insignificantFeatureIds().contains(new Integer(featureId));
}
/**
* Return a set of the object's "insignificant" feature ids.
* These are the EMF features that will not be used to determine if all
* the features are unset. We use this to determine when to remove
* an element from the xml.
*
* If you need instance-based calculation of your xml "insignificant" aspects,
* override this method. If class-based calculation is sufficient,
* override #addInsignificantXmlFeatureIdsTo(Set).
*
* @see isAllFeaturesUnset()
*/
protected Set<Integer> insignificantFeatureIds() {
synchronized (insignificantFeatureIdSets) {
Set<Integer> insignificantXmlFeatureIds = insignificantFeatureIdSets.get(this.getClass());
if (insignificantXmlFeatureIds == null) {
insignificantXmlFeatureIds = new HashSet<Integer>();
this.addInsignificantXmlFeatureIdsTo(insignificantXmlFeatureIds);
insignificantFeatureIdSets.put(this.getClass(), insignificantXmlFeatureIds);
}
return insignificantXmlFeatureIds;
}
}
/**
* Add the object's "insignificant" feature ids to the specified set.
* These are the EMF features that, when they change, will NOT cause the
* object (or its containing tree) to be resynched, i.e. defaults calculated.
* If class-based calculation of your "insignificant" features is sufficient,
* override this method. If you need instance-based calculation,
* override #insignificantXmlFeatureIds().
*/
protected void addInsignificantXmlFeatureIdsTo(Set<Integer> insignificantXmlFeatureIds) {
// when you override this method, don't forget to include:
// super.addInsignificantXmlFeatureIdsTo(insignificantXmlFeatureIds);
}
// *************************************************************************
public boolean isAllFeaturesUnset() {
for (EStructuralFeature feature : eClass().getEAllStructuralFeatures()) {
if (eIsSet(feature)) {
return false;
}
}
return true;
}
@Override
public EList<Adapter> eAdapters() {
if (this.eAdapters == null) {
this.eAdapters = new XmlEAdapterList<Adapter>(this);
}
return this.eAdapters;
}
public IDOMNode getNode() {
return this.node;
}
protected class XmlEAdapterList<E extends Object & Adapter> extends EAdapterList<E>
{
public XmlEAdapterList(Notifier notifier) {
super(notifier);
}
@Override
protected void didAdd(int index, E newObject) {
super.didAdd(index, newObject);
try {
node = (IDOMNode) ClassTools.executeMethod(newObject, "getNode");
}
catch (RuntimeException re) {
// nothing to do
}
}
@Override
protected void didRemove(int index, E oldObject) {
super.didRemove(index, oldObject);
if ((oldObject instanceof EMF2DOMAdapter) && (((EMF2DOMAdapter) oldObject).getNode() == AbstractJpaEObject.this.node)) {
AbstractJpaEObject.this.node = null;
}
}
}
public TextRange getValidationTextRange() {
return getFullTextRange();
}
public TextRange getSelectionTextRange() {
return getFullTextRange();
}
public TextRange getFullTextRange() {
return buildTextRange(this.node);
}
protected TextRange buildTextRange(IDOMNode domNode) {
if (domNode == null) {
return null;
}
return new DOMNodeTextRange(domNode);
}
public boolean containsOffset(int textOffset) {
if (node == null) {
return false;
}
return node.contains(textOffset);
}
/**
* Adapt an IDOMNode to the TextRange interface.
*/
private static class DOMNodeTextRange extends AbstractTextRange
{
private final IDOMNode node;
DOMNodeTextRange(IDOMNode node) {
super();
this.node = node;
}
public int getOffset() {
return this.node.getStartOffset();
}
public int getLength() {
if (this.node.getNodeType() == Node.ELEMENT_NODE) {
return ((IDOMElement) this.node).getStartEndOffset() - this.node.getStartOffset();
}
return this.node.getLength();
}
public int getLineNumber() {
return this.node.getStructuredDocument().getLineOfOffset(getOffset()) + 1;
}
}
}
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