/*
* Copyright (c) 2003- michael lawley and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the GNU Lesser General Public License version 2.1 as published by the Free Software Foundation
* which accompanies this distribution, and is available by writing to
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Contributors:
* michael lawley
*
*
*/
package tefkat.model.impl;
import java.lang.ref.WeakReference;
import java.util.Iterator;
import java.util.Map;
import java.util.WeakHashMap;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.util.BasicEList;
import org.eclipse.emf.common.util.EList;
import org.eclipse.emf.common.util.TreeIterator;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.impl.ENotificationImpl;
import org.eclipse.emf.ecore.resource.Resource;
import tefkat.model.ContainerExtent;
import tefkat.model.TefkatPackage;
/**
* <!-- begin-user-doc -->
* An implementation of the model object '<em><b>Container Extent</b></em>'.
* <!-- end-user-doc -->
* <p>
* The following features are implemented:
* <ul>
* <li>{@link tefkat.model.impl.ContainerExtentImpl#getResource <em>Resource</em>}</li>
* </ul>
* </p>
*
* @generated
*/
public class ContainerExtentImpl extends ExtentImpl implements ContainerExtent {
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public static final String copyright = "Copyright michael lawley Pty Ltd 2003-2007";
/**
* The default value of the '{@link #getResource() <em>Resource</em>}' attribute.
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @see #getResource()
* @generated
* @ordered
*/
protected static final Resource RESOURCE_EDEFAULT = null;
/**
* The cached value of the '{@link #getResource() <em>Resource</em>}' attribute.
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @see #getResource()
* @generated
* @ordered
*/
protected Resource resource = RESOURCE_EDEFAULT;
private Map exactlyCache = new WeakHashMap();
private Map inexactlyCache = new WeakHashMap();
private boolean noCache = false;
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
protected ContainerExtentImpl() {
super();
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
protected EClass eStaticClass() {
return TefkatPackage.Literals.CONTAINER_EXTENT;
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated NOT
*/
public boolean contains(EObject instance) {
Resource res = instance.eResource();
return null != res && res.equals(resource);
}
/**
* <!-- begin-user-doc -->
* FIXME Yikes, need to invalidate the cache if the extent is modified, but
* in the context of a Tefkat transformation, only tracking extents will get
* modified, and only via our add method.
* <!-- end-user-doc -->
* @generated NOT
*/
public EList getObjectsByClass(final EClass theClass, boolean isExactly) {
EList objects;
if (null == theClass) {
// null class means no type constraint -- i.e., get all instances
objects = cacheLookup(exactlyCache, theClass);
if (null == objects) {
objects = new BasicEList();
for (Iterator itr = resource.getAllContents(); itr.hasNext(); ) {
objects.add(itr.next());
}
if (!noCache) cacheStore(exactlyCache, theClass, objects);
}
} else if (isExactly) {
objects = cacheLookup(exactlyCache, theClass);
if (null == objects) {
objects = new BasicEList();
for (Iterator itr = resource.getAllContents(); itr.hasNext(); ) {
EObject obj = (EObject) itr.next();
if (theClass.equals(obj.eClass())) {
objects.add(obj);
}
}
if (!noCache) cacheStore(exactlyCache, theClass, objects);
}
} else {
objects = cacheLookup(inexactlyCache, theClass);
if (null == objects) {
objects = new BasicEList();
for (Iterator itr = resource.getAllContents(); itr.hasNext(); ) {
EObject obj = (EObject) itr.next();
if (theClass.isInstance(obj)) {
objects.add(obj);
}
}
if (!noCache) cacheStore(inexactlyCache, theClass, objects);
}
}
return objects;
}
private EList cacheLookup(Map cache, EClass key) {
// Can't cache if underlying resource has changed behind our back
// -- the add(EObject) method maintains the caches
if (resource.isModified()) {
return null;
}
Object result = cache.get(key);
if (null != result) {
result = ((WeakReference) result).get();
}
return (EList) result;
}
private void cacheStore(Map cache, EClass key, EList objects) {
// Can't cache if underlying resource has changed behind our back
// -- the add(EObject) method maintains the caches
if (!resource.isModified()) {
cache.put(key, new WeakReference(objects));
}
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated NOT
*/
public TreeIterator getAllContents() {
return resource.getAllContents();
}
/**
* <!-- begin-user-doc -->
* Adds obj to the underlying Resource and updates the caches
* <!-- end-user-doc -->
* @generated NOT
*/
public void add(EObject obj) {
final boolean modState = resource.isModified();
resource.getContents().add(obj);
// System.err.println(resource.getURI() + " " + resource.getContents().size());
final EClass eClass = obj.eClass();
EList exact = getCache(exactlyCache, eClass);
if (null != exact) {
// System.err.println("hit");
exact.add(obj);
}
EList inexact = getCache(inexactlyCache, eClass);
if (null != inexact) {
inexact.add(obj);
}
for (Iterator itr = eClass.getEAllSuperTypes().iterator(); itr.hasNext(); ) {
EClass superClass = (EClass) itr.next();
inexact = getCache(inexactlyCache, superClass);
if (null != inexact) {
inexact.add(obj);
}
}
resource.setModified(modState);
}
private EList getCache(Map cache, EClass key) {
Object result = cache.get(key);
if (null != result) {
result = ((WeakReference) result).get();
}
if (null == result) {
result = new BasicEList();
cache.put(key, new WeakReference(result));
}
return (EList) result;
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated NOT
*/
public void remove(EObject obj) {
resource.getContents().remove(obj);
System.err.println(resource.getURI() + " remove");
throw new UnsupportedOperationException("Tefkat doesn't use this method");
// EList exact = cacheLookup(exactlyCache, obj.eClass());
// if (null != exact) {
// exact.remove(obj);
// }
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated NOT
*/
public Resource getResource() {
if (true) throw new UnsupportedOperationException("Don't really want to expose our internal Resource");
return resource;
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated NOT
*/
public void setResource(Resource newResource) {
Resource oldResource = resource;
resource = newResource;
if (resource.isModified()) {
throw new IllegalArgumentException("New Resource nust not be in a modified state: " + newResource);
}
exactlyCache.clear();
inexactlyCache.clear();
if (eNotificationRequired())
eNotify(new ENotificationImpl(this, Notification.SET, TefkatPackage.CONTAINER_EXTENT__RESOURCE, oldResource, resource));
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public Object eGet(int featureID, boolean resolve, boolean coreType) {
switch (featureID) {
case TefkatPackage.CONTAINER_EXTENT__RESOURCE:
return getResource();
}
return super.eGet(featureID, resolve, coreType);
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public void eSet(int featureID, Object newValue) {
switch (featureID) {
case TefkatPackage.CONTAINER_EXTENT__RESOURCE:
setResource((Resource)newValue);
return;
}
super.eSet(featureID, newValue);
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public void eUnset(int featureID) {
switch (featureID) {
case TefkatPackage.CONTAINER_EXTENT__RESOURCE:
setResource(RESOURCE_EDEFAULT);
return;
}
super.eUnset(featureID);
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public boolean eIsSet(int featureID) {
switch (featureID) {
case TefkatPackage.CONTAINER_EXTENT__RESOURCE:
return RESOURCE_EDEFAULT == null ? resource != null : !RESOURCE_EDEFAULT.equals(resource);
}
return super.eIsSet(featureID);
}
/**
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated NOT
*/
public String toString() {
if (eIsProxy()) return super.toString();
return null == resource ? "null Resource" : String.valueOf(resource.getURI());
}
} //ContainerExtentImpl