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/*****************************************************************************
* Copyright (c) 2013 CEA LIST.
*
*
* 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:
* Camille Letavernier (camille.letavernier@cea.fr) - Initial API and implementation
* Vincent Lorenzo (vincent.lorenzo@cea.fr) - bug 405442
*****************************************************************************/
package org.eclipse.papyrus.uml.tools.providers;
import java.util.Collection;
import java.util.Iterator;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.papyrus.infra.core.services.ServiceException;
import org.eclipse.papyrus.infra.core.services.ServicesRegistry;
import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
import org.eclipse.papyrus.infra.emf.utils.ServiceUtilsForEObject;
import org.eclipse.papyrus.infra.services.labelprovider.service.IFilteredLabelProvider;
import org.eclipse.papyrus.infra.services.labelprovider.service.LabelProviderService;
import org.eclipse.papyrus.infra.tools.Activator;
import org.eclipse.papyrus.infra.ui.emf.providers.EMFLabelProvider;
import org.eclipse.papyrus.uml.tools.utils.DataTypeUtil;
import org.eclipse.swt.graphics.Image;
/**
* A generic Label Provider for EObjects which are instances of UML DataTypes (Defined as EClasses)
*
* @author Camille Letavernier
*
* @see {@link DataTypeUtil#isDataTypeDefinition(EClass)}
*/
public class GenericDataTypeLabelProvider extends EMFLabelProvider implements IFilteredLabelProvider {
/**
* @since 3.0
*/
public static final String SEPARATOR = ","; //$NON-NLS-1$
/**
* @since 3.0
*/
public static final String DATATYPE_START = "("; //$NON-NLS-1$
/**
* @since 3.0
*/
public static final String DATATYPE_END = ")"; //$NON-NLS-1$
/**
* @since 3.0
*/
public static final String COLLECTION_START = "{"; //$NON-NLS-1$
/**
* @since 3.0
*/
public static final String COLLECTION_END = "}"; //$NON-NLS-1$
/**
* @since 3.0
*/
public static final String EQUALS = "="; //$NON-NLS-1$
/**
* {@inheritDoc}
*/
public boolean accept(Object element) {
if (element instanceof Collection<?>) {
for (Object item : ((Collection<?>) element)) {
if (!accept(item)) {
return false;
}
}
return !((Collection<?>) element).isEmpty();
}
EObject eObject = EMFHelper.getEObject(element);
if (eObject == null) {
return false;
}
return DataTypeUtil.isDataTypeInstance(eObject);
}
@Override
public String getText(Object element) {
// now we use the Marte VSL syntax : (propertyName=propertyValue, an otherProperty=value, (propertyFromAReferencedDataType=value) )
LabelProviderService serv = null;
if (element instanceof Collection<?> && !((Collection<?>) element).isEmpty()) {
final Object first = ((Collection<?>) element).iterator().next();
if (first instanceof EObject) {// always true due to the accept method
serv = getLabelProviderService((EObject) first);
}
} else {
// always true due to the accept method
serv = getLabelProviderService((EObject) element);
}
if (null == serv) {
Activator.log.error("LabelProviderService not found for " + element, null); //$NON-NLS-1$
}
// Initial implementation. TODO: Improve the label
final StringBuilder builder = new StringBuilder(DATATYPE_START);
if (element instanceof Collection<?> && !(((Collection<?>) element).isEmpty())) {
builder.append(getLabel(serv, element)); // collection management is delegated to this method
} else {
final EObject dataTypeInstance = EMFHelper.getEObject(element);
if (dataTypeInstance != null) {
final EClass dataTypeDefinition = dataTypeInstance.eClass();
final Iterator<EStructuralFeature> iter = dataTypeDefinition.getEAllStructuralFeatures().iterator();
while (iter.hasNext()) {
final EStructuralFeature feature = iter.next();
builder.append(feature.getName());
builder.append(EQUALS);
final Object value = dataTypeInstance.eGet(feature);
builder.append(getLabel(serv, value));
if (iter.hasNext()) {
builder.append(SEPARATOR);
builder.append(" ");//$NON-NLS-1$
}
}
}
}
builder.append(DATATYPE_END);
return builder.toString();
}
/**
*
* @param service
* the label provider service
* @param current
* the object for which we want the label
* @return
* the label for the given value
* @since 3.0
*/
protected String getLabel(final LabelProviderService service, final Object object) {
final StringBuilder builder = new StringBuilder();
if (object instanceof Collection<?>) {
builder.append(COLLECTION_START);
final Collection<?> coll = (Collection<?>) object;
final Iterator<?> iter = coll.iterator();
while (iter.hasNext()) {
final Object current = iter.next();
final String value = getLabel(service, current);
if (value != null) {
builder.append(value);
} else {
builder.append(" "); //$NON-NLS-1$
}
if (iter.hasNext()) {
builder.append(SEPARATOR);
builder.append(" "); //$NON-NLS-1$
}
}
builder.append(COLLECTION_END);
} else {
final String label = service.getLabelProvider(object).getText(object);
if (label != null) {
builder.append(label);
}
}
return builder.toString();
}
/**
*
* @param dataTypeInstance
* a datatype instance
* @return
* the label provider service found or <code>null</code> otherwise
* @since 3.0
*/
protected LabelProviderService getLabelProviderService(final EObject dataTypeInstance) {
ServicesRegistry registry = null;
LabelProviderService service = null;
try {
registry = ServiceUtilsForEObject.getInstance().getServiceRegistry(dataTypeInstance);
service = registry.getService(LabelProviderService.class);
} catch (ServiceException e) {
Activator.log.error(e);
}
return service;
}
@Override
public Image getImage(Object element) {
return null;
}
}
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