bundles/org.eclipse.emf.ecp.view.rule.model/src/org/eclipse/emf/ecp/view/spi/rule/model/impl/IsProxyConditionImpl.java - emfclient/org.eclipse.emf.ecp.core - Git at Google

 /**
  * Copyright (c) 2018 Christian W. Damus and others.
  *
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  * Christian W. Damus - initial API and implementation
  */
 package org.eclipse.emf.ecp.view.spi.rule.model.impl;

 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;

 import org.eclipse.core.databinding.observable.Observables;
 import org.eclipse.core.databinding.observable.list.IObservableList;
 import org.eclipse.emf.common.notify.Notification;
 import org.eclipse.emf.common.notify.NotificationChain;
 import org.eclipse.emf.ecore.EClass;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.emf.ecore.EReference;
 import org.eclipse.emf.ecore.EStructuralFeature;
 import org.eclipse.emf.ecore.InternalEObject;
 import org.eclipse.emf.ecore.impl.ENotificationImpl;
 import org.eclipse.emf.ecp.view.spi.model.VDomainModelReference;
 import org.eclipse.emf.ecp.view.spi.rule.model.Activator;
 import org.eclipse.emf.ecp.view.spi.rule.model.IsProxyCondition;
 import org.eclipse.emf.ecp.view.spi.rule.model.RulePackage;
 import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedException;

 /**
  * <!-- begin-user-doc -->
  * An implementation of the model object '<em><b>Is Proxy</b></em>'.
  * <!-- end-user-doc -->
  * <p>
  * The following features are implemented:
  * </p>
  * <ul>
  * <li>{@link org.eclipse.emf.ecp.view.spi.rule.model.impl.IsProxyConditionImpl#getDomainModelReference <em>Domain Model
  * Reference</em>}</li>
  * </ul>
  *
  * @generated
  */
 public class IsProxyConditionImpl extends ConditionImpl implements IsProxyCondition {
 	/**
 	 * The cached value of the '{@link #getDomainModelReference() <em>Domain Model Reference</em>}' containment
 	 * reference.
 	 * <!-- begin-user-doc -->
 	 * <!-- end-user-doc -->
 	 *
 	 * @see #getDomainModelReference()
 	 * @generated
 	 * @ordered
 	 */
 	protected VDomainModelReference domainModelReference;

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

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

 	/**
 	 * <!-- begin-user-doc -->
 	 * <!-- end-user-doc -->
 	 *
 	 * @generated
 	 */
 	@Override
 	public VDomainModelReference getDomainModelReference() {
 		return domainModelReference;
 	}

 	/**
 	 * <!-- begin-user-doc -->
 	 * <!-- end-user-doc -->
 	 *
 	 * @generated
 	 */
 	public NotificationChain basicSetDomainModelReference(VDomainModelReference newDomainModelReference,
 		NotificationChain msgs) {
 		final VDomainModelReference oldDomainModelReference = domainModelReference;
 		domainModelReference = newDomainModelReference;
 		if (eNotificationRequired()) {
 			final ENotificationImpl notification = new ENotificationImpl(this, Notification.SET,
 				RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE, oldDomainModelReference,
 				newDomainModelReference);
 			if (msgs == null) {
 				msgs = notification;
 			} else {
 				msgs.add(notification);
 			}
 		}
 		return msgs;
 	}

 	/**
 	 * <!-- begin-user-doc -->
 	 * <!-- end-user-doc -->
 	 *
 	 * @generated
 	 */
 	@Override
 	public void setDomainModelReference(VDomainModelReference newDomainModelReference) {
 		if (newDomainModelReference != domainModelReference) {
 			NotificationChain msgs = null;
 			if (domainModelReference != null) {
 				msgs = ((InternalEObject) domainModelReference).eInverseRemove(this,
 					EOPPOSITE_FEATURE_BASE - RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE, null, msgs);
 			}
 			if (newDomainModelReference != null) {
 				msgs = ((InternalEObject) newDomainModelReference).eInverseAdd(this,
 					EOPPOSITE_FEATURE_BASE - RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE, null, msgs);
 			}
 			msgs = basicSetDomainModelReference(newDomainModelReference, msgs);
 			if (msgs != null) {
 				msgs.dispatch();
 			}
 		} else if (eNotificationRequired()) {
 			eNotify(
 				new ENotificationImpl(this, Notification.SET, RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE,
 					newDomainModelReference, newDomainModelReference));
 		}
 	}

 	/**
 	 * <!-- begin-user-doc -->
 	 * <!-- end-user-doc -->
 	 *
 	 * @generated
 	 */
 	@Override
 	public NotificationChain eInverseRemove(InternalEObject otherEnd, int featureID, NotificationChain msgs) {
 		switch (featureID) {
 		case RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE:
 			return basicSetDomainModelReference(null, msgs);
 		}
 		return super.eInverseRemove(otherEnd, featureID, msgs);
 	}

 	/**
 	 * <!-- begin-user-doc -->
 	 * <!-- end-user-doc -->
 	 *
 	 * @generated
 	 */
 	@Override
 	public Object eGet(int featureID, boolean resolve, boolean coreType) {
 		switch (featureID) {
 		case RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE:
 			return getDomainModelReference();
 		}
 		return super.eGet(featureID, resolve, coreType);
 	}

 	/**
 	 * <!-- begin-user-doc -->
 	 * <!-- end-user-doc -->
 	 *
 	 * @generated
 	 */
 	@Override
 	public void eSet(int featureID, Object newValue) {
 		switch (featureID) {
 		case RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE:
 			setDomainModelReference((VDomainModelReference) newValue);
 			return;
 		}
 		super.eSet(featureID, newValue);
 	}

 	/**
 	 * <!-- begin-user-doc -->
 	 * <!-- end-user-doc -->
 	 *
 	 * @generated
 	 */
 	@Override
 	public void eUnset(int featureID) {
 		switch (featureID) {
 		case RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE:
 			setDomainModelReference((VDomainModelReference) null);
 			return;
 		}
 		super.eUnset(featureID);
 	}

 	/**
 	 * <!-- begin-user-doc -->
 	 * <!-- end-user-doc -->
 	 *
 	 * @generated
 	 */
 	@Override
 	public boolean eIsSet(int featureID) {
 		switch (featureID) {
 		case RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE:
 			return domainModelReference != null;
 		}
 		return super.eIsSet(featureID);
 	}

 	@Override
 	public boolean evaluate(EObject domainModel) {
 		final VDomainModelReference path = getDomainModelReference();
 		final Collection<? extends EObject> subjects = get(domainModel, path);
 		return doEvaluate(subjects);
 	}

 	/**
 	 * Obtains the objects referenced by a domain-model reference, from the given
 	 * {@code owner} object.
 	 *
 	 * @param owner the owner of the reference
 	 * @param dmr the domain-model reference to follow
 	 *
 	 * @return the referenced objects
 	 */
 	List<? extends EObject> get(EObject owner, VDomainModelReference dmr) {
 		if (dmr == null) {
 			// Condition on the owner object, itself
 			return Collections.singletonList(owner);
 		}

 		try {
 			@SuppressWarnings("unchecked")
 			IObservableList<? extends EObject> result = Activator.getDefault().getEMFFormsDatabinding()
 				.getObservableList(dmr, owner);

 			// We have to have EObjects, which means an EReference
 			if (result == null || !(result.getElementType() instanceof EReference)) {
 				result = Observables.emptyObservableList();
 			}
 			return result;
 		} catch (final DatabindingFailedException e) {
 			Activator.log(e);
 			return Collections.emptyList();
 		}
 	}

 	/**
 	 * Evaluates me by iteration of the given {@code subjects}.
 	 *
 	 * @param subjects the objects over which to iterate my {@link #getItemCondition() condition}
 	 * @return the result of the iteration
 	 */
 	protected boolean doEvaluate(Collection<? extends EObject> subjects) {
 		boolean result = false;

 		for (final EObject next : subjects) {
 			result = next != null && next.eIsProxy();
 			if (result) {
 				break; // Short-circuit
 			}
 		}

 		return result;
 	}

 	@Override
 	public boolean evaluateChangedValues(EObject domainModel,
 		Map<EStructuralFeature.Setting, Object> possibleNewValues) {

 		if (getDomainModelReference() == null) {
 			// Condition on the domain object, itself
 			return domainModel.eIsProxy();
 		}

 		// We are only interested in changes to the set of objects that I iterate over (subjects)
 		final List<Collection<? extends EObject>> proposedNewSubjects = new ArrayList<Collection<? extends EObject>>();

 		for (final Map.Entry<EStructuralFeature.Setting, Object> next : possibleNewValues.entrySet()) {
 			final EStructuralFeature.Setting setting = next.getKey();

 			if (setting.getEObject() == domainModel) {
 				// Changing the set of objects to iterate
 				@SuppressWarnings("unchecked")
 				final List<? extends EObject> newValues = (List<? extends EObject>) next.getValue();
 				proposedNewSubjects.add(newValues);
 			} // else it's a change to features of an existing subject
 		}

 		boolean result = true;
 		for (final Collection<? extends EObject> newValues : proposedNewSubjects) {
 			result = doEvaluate(newValues);
 			if (result) {
 				break;
 			}
 		}

 		return result;
 	}

 } // IsProxyConditionImpl
	/**
	* Copyright (c) 2018 Christian W. Damus and others.
	*
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* Christian W. Damus - initial API and implementation
	*/
	package org.eclipse.emf.ecp.view.spi.rule.model.impl;

	import java.util.ArrayList;
	import java.util.Collection;
	import java.util.Collections;
	import java.util.List;
	import java.util.Map;

	import org.eclipse.core.databinding.observable.Observables;
	import org.eclipse.core.databinding.observable.list.IObservableList;
	import org.eclipse.emf.common.notify.Notification;
	import org.eclipse.emf.common.notify.NotificationChain;
	import org.eclipse.emf.ecore.EClass;
	import org.eclipse.emf.ecore.EObject;
	import org.eclipse.emf.ecore.EReference;
	import org.eclipse.emf.ecore.EStructuralFeature;
	import org.eclipse.emf.ecore.InternalEObject;
	import org.eclipse.emf.ecore.impl.ENotificationImpl;
	import org.eclipse.emf.ecp.view.spi.model.VDomainModelReference;
	import org.eclipse.emf.ecp.view.spi.rule.model.Activator;
	import org.eclipse.emf.ecp.view.spi.rule.model.IsProxyCondition;
	import org.eclipse.emf.ecp.view.spi.rule.model.RulePackage;
	import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedException;

	/**
	* <!-- begin-user-doc -->
	* An implementation of the model object '<em><b>Is Proxy</b></em>'.
	* <!-- end-user-doc -->
	* <p>
	* The following features are implemented:
	* </p>
	* <ul>
	* <li>{@link org.eclipse.emf.ecp.view.spi.rule.model.impl.IsProxyConditionImpl#getDomainModelReference <em>Domain Model
	* Reference</em>}</li>
	* </ul>
	*
	* @generated
	*/
	public class IsProxyConditionImpl extends ConditionImpl implements IsProxyCondition {
	/**
	* The cached value of the '{@link #getDomainModelReference() <em>Domain Model Reference</em>}' containment
	* reference.
	* <!-- begin-user-doc -->
	* <!-- end-user-doc -->
	*
	* @see #getDomainModelReference()
	* @generated
	* @ordered
	*/
	protected VDomainModelReference domainModelReference;

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

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

	/**
	* <!-- begin-user-doc -->
	* <!-- end-user-doc -->
	*
	* @generated
	*/
	@Override
	public VDomainModelReference getDomainModelReference() {
	return domainModelReference;
	}

	/**
	* <!-- begin-user-doc -->
	* <!-- end-user-doc -->
	*
	* @generated
	*/
	public NotificationChain basicSetDomainModelReference(VDomainModelReference newDomainModelReference,
	NotificationChain msgs) {
	final VDomainModelReference oldDomainModelReference = domainModelReference;
	domainModelReference = newDomainModelReference;
	if (eNotificationRequired()) {
	final ENotificationImpl notification = new ENotificationImpl(this, Notification.SET,
	RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE, oldDomainModelReference,
	newDomainModelReference);
	if (msgs == null) {
	msgs = notification;
	} else {
	msgs.add(notification);
	}
	}
	return msgs;
	}

	/**
	* <!-- begin-user-doc -->
	* <!-- end-user-doc -->
	*
	* @generated
	*/
	@Override
	public void setDomainModelReference(VDomainModelReference newDomainModelReference) {
	if (newDomainModelReference != domainModelReference) {
	NotificationChain msgs = null;
	if (domainModelReference != null) {
	msgs = ((InternalEObject) domainModelReference).eInverseRemove(this,
	EOPPOSITE_FEATURE_BASE - RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE, null, msgs);
	}
	if (newDomainModelReference != null) {
	msgs = ((InternalEObject) newDomainModelReference).eInverseAdd(this,
	EOPPOSITE_FEATURE_BASE - RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE, null, msgs);
	}
	msgs = basicSetDomainModelReference(newDomainModelReference, msgs);
	if (msgs != null) {
	msgs.dispatch();
	}
	} else if (eNotificationRequired()) {
	eNotify(
	new ENotificationImpl(this, Notification.SET, RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE,
	newDomainModelReference, newDomainModelReference));
	}
	}

	/**
	* <!-- begin-user-doc -->
	* <!-- end-user-doc -->
	*
	* @generated
	*/
	@Override
	public NotificationChain eInverseRemove(InternalEObject otherEnd, int featureID, NotificationChain msgs) {
	switch (featureID) {
	case RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE:
	return basicSetDomainModelReference(null, msgs);
	}
	return super.eInverseRemove(otherEnd, featureID, msgs);
	}

	/**
	* <!-- begin-user-doc -->
	* <!-- end-user-doc -->
	*
	* @generated
	*/
	@Override
	public Object eGet(int featureID, boolean resolve, boolean coreType) {
	switch (featureID) {
	case RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE:
	return getDomainModelReference();
	}
	return super.eGet(featureID, resolve, coreType);
	}

	/**
	* <!-- begin-user-doc -->
	* <!-- end-user-doc -->
	*
	* @generated
	*/
	@Override
	public void eSet(int featureID, Object newValue) {
	switch (featureID) {
	case RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE:
	setDomainModelReference((VDomainModelReference) newValue);
	return;
	}
	super.eSet(featureID, newValue);
	}

	/**
	* <!-- begin-user-doc -->
	* <!-- end-user-doc -->
	*
	* @generated
	*/
	@Override
	public void eUnset(int featureID) {
	switch (featureID) {
	case RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE:
	setDomainModelReference((VDomainModelReference) null);
	return;
	}
	super.eUnset(featureID);
	}

	/**
	* <!-- begin-user-doc -->
	* <!-- end-user-doc -->
	*
	* @generated
	*/
	@Override
	public boolean eIsSet(int featureID) {
	switch (featureID) {
	case RulePackage.IS_PROXY_CONDITION__DOMAIN_MODEL_REFERENCE:
	return domainModelReference != null;
	}
	return super.eIsSet(featureID);
	}

	@Override
	public boolean evaluate(EObject domainModel) {
	final VDomainModelReference path = getDomainModelReference();
	final Collection<? extends EObject> subjects = get(domainModel, path);
	return doEvaluate(subjects);
	}

	/**
	* Obtains the objects referenced by a domain-model reference, from the given
	* {@code owner} object.
	*
	* @param owner the owner of the reference
	* @param dmr the domain-model reference to follow
	*
	* @return the referenced objects
	*/
	List<? extends EObject> get(EObject owner, VDomainModelReference dmr) {
	if (dmr == null) {
	// Condition on the owner object, itself
	return Collections.singletonList(owner);
	}

	try {
	@SuppressWarnings("unchecked")
	IObservableList<? extends EObject> result = Activator.getDefault().getEMFFormsDatabinding()
	.getObservableList(dmr, owner);

	// We have to have EObjects, which means an EReference
	if (result == null \|\| !(result.getElementType() instanceof EReference)) {
	result = Observables.emptyObservableList();
	}
	return result;
	} catch (final DatabindingFailedException e) {
	Activator.log(e);
	return Collections.emptyList();
	}
	}

	/**
	* Evaluates me by iteration of the given {@code subjects}.
	*
	* @param subjects the objects over which to iterate my {@link #getItemCondition() condition}
	* @return the result of the iteration
	*/
	protected boolean doEvaluate(Collection<? extends EObject> subjects) {
	boolean result = false;

	for (final EObject next : subjects) {
	result = next != null && next.eIsProxy();
	if (result) {
	break; // Short-circuit
	}
	}

	return result;
	}

	@Override
	public boolean evaluateChangedValues(EObject domainModel,
	Map<EStructuralFeature.Setting, Object> possibleNewValues) {

	if (getDomainModelReference() == null) {
	// Condition on the domain object, itself
	return domainModel.eIsProxy();
	}

	// We are only interested in changes to the set of objects that I iterate over (subjects)
	final List<Collection<? extends EObject>> proposedNewSubjects = new ArrayList<Collection<? extends EObject>>();

	for (final Map.Entry<EStructuralFeature.Setting, Object> next : possibleNewValues.entrySet()) {
	final EStructuralFeature.Setting setting = next.getKey();

	if (setting.getEObject() == domainModel) {
	// Changing the set of objects to iterate
	@SuppressWarnings("unchecked")
	final List<? extends EObject> newValues = (List<? extends EObject>) next.getValue();
	proposedNewSubjects.add(newValues);
	} // else it's a change to features of an existing subject
	}

	boolean result = true;
	for (final Collection<? extends EObject> newValues : proposedNewSubjects) {
	result = doEvaluate(newValues);
	if (result) {
	break;
	}
	}

	return result;
	}

	} // IsProxyConditionImpl