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/**
* <copyright>
*
* Copyright (c) 2005, 2006, 2007 Springsite BV (The Netherlands) and others
* 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:
* Martin Taal
* </copyright>
*
* $Id: MappingUtil.java,v 1.7 2007/02/01 12:36:36 mtaal Exp $
*/
package org.eclipse.emf.teneo.jpox.mapper;
import java.util.ArrayList;
import java.util.Iterator;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.emf.ecore.EAttribute;
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.teneo.ERuntime;
import org.eclipse.emf.teneo.annotations.pamodel.PAnnotatedEAttribute;
import org.eclipse.emf.teneo.annotations.pannotation.FetchType;
import org.eclipse.emf.teneo.jpox.elist.GenericFeatureMapEntry;
import org.eclipse.emf.teneo.jpox.mapping.AnyTypeEObject;
import org.eclipse.emf.teneo.jpox.mapping.AnyTypeObject;
import org.eclipse.emf.teneo.simpledom.Element;
import org.eclipse.emf.teneo.util.StoreUtil;
/**
* Generates a jpox mapping file based on the pamodel.
*
* @author <a href="mailto:mtaal@elver.org">Martin Taal</a>
* @version $Revision: 1.7 $
*/
public class MappingUtil {
/** The logger for all these exceptions */
protected static final Log log = LogFactory.getLog(MappingUtil.class);
/** Returns the impl class name of an eclass */
public static String getImplNameOfEClass(String eClassURI, MappingContext mappingContext) {
if (mappingContext == null || mappingContext.getEClassNameStrategy() == null) {
System.err.println("TEST");
}
final EClass eclass = mappingContext.getEClassNameStrategy().toEClass(eClassURI, mappingContext.getEpackages());
if (eclass == null) {
throw new JPOXMappingException("Uri: " + eClassURI + " does not translate to an eclass");
}
final Class clazz = getImplClassOfEClass(eclass);
if (clazz == null) {
throw new JPOXMappingException("Uri: " + eClassURI + " does not translate to an instance class");
}
return clazz.getName();
}
/** Returns the impl class name of an eclass, if the eclass is an interface
* then the interface class is returned */
public static Class getImplClassOfEClass(EClass eClass) {
if (eClass.isInterface()) {
return eClass.getInstanceClass();
}
return ERuntime.INSTANCE.getInstanceClass(eClass);
}
/** Adds an anytype embedded element definition to the passed element */
public static void addAnytypeMapping(Element field) {
Element embeddedElement = field.addElement("element").addElement("embedded");
Element fieldElement = embeddedElement.addElement("field");
fieldElement.addAttribute("name", "classifier");
fieldElement.addElement("column").addAttribute("name", "CLASSIFIER");
fieldElement = embeddedElement.addElement("field");
fieldElement.addAttribute("name", "value");
fieldElement.addElement("column").addAttribute("name", "VALUE");
}
/** Adds a feature map entry mapping to the passed element */
public static void addFeatureMapEntryMapping(Element field) {
log.debug("Any feature entry, adding embedded tags");
Element embeddedElement = field.addElement("element").addElement("embedded");
Element fieldElement = embeddedElement.addElement("field");
fieldElement.addAttribute("name", "featurePath");
fieldElement.addElement("column").addAttribute("name", "FEATUREPATH");
fieldElement = embeddedElement.addElement("field");
fieldElement.addAttribute("name", "anyValue");
fieldElement.addElement("column").addAttribute("name", "ANYVALUE");
}
/** Adds a generic feature map entry to the passed element */
public static void addGenericFeatureMapEntryMapping(Element field, PAnnotatedEAttribute aAttribute, FetchType ft) {
EAttribute eAttribute = aAttribute.getAnnotatedEAttribute();
log.debug("Any feature entry, adding embedded tags");
Element collection = field.addElement("collection").addAttribute("element-type", GenericFeatureMapEntry.class.getName());
field.addElement("join");
Element embeddedElement = field.addElement("element").addElement("embedded");
Element fieldElement = embeddedElement.addElement("field").addAttribute("name", "featurePath");
fieldElement = embeddedElement.addElement("field").addAttribute("name", "localAnyValue").addAttribute("embedded", "true");
addExtensionImplementationClasses(fieldElement, false, false, eAttribute);
fieldElement = embeddedElement.addElement("field").addAttribute("name", "localReferenceValue");
if (!addExtensionImplementationClasses(fieldElement, true, false, eAttribute)) {
fieldElement.addAttribute("embedded", "true");
}
fieldElement.addElement("foreign-key").addAttribute("delete-action", "restrict").addAttribute("update-action", "cascade");
fieldElement = embeddedElement.addElement("field");
fieldElement.addAttribute("name", "localContainmentReferenceValue").addAttribute("dependent", "true");
fieldElement.addElement("foreign-key").addAttribute("delete-action", "cascade").addAttribute("update-action", "cascade");
if (!addExtensionImplementationClasses(fieldElement, true, true, eAttribute)) {
fieldElement.addAttribute("embedded", "true");
}
addEagerLazyLoading(collection, ft);
}
/** Adds the correct jpox extension based on the fetch type */
public static void addEagerLazyLoading(Element field, FetchType ft) {
if (ft.equals(FetchType.EAGER_LITERAL)) {
field.addElement("extension").addAttribute("vendor-name", "jpox").addAttribute("key", "cache-lazy-loading").addAttribute(
"value", "false");
} else {
field.addElement("extension").addAttribute("vendor-name", "jpox").addAttribute("key", "cache-lazy-loading").addAttribute(
"value", "true");
}
}
/** Returns true if the feature is a wildcard feature */
public static boolean isWildcard(EStructuralFeature eStructuralFeature) {
return StoreUtil.isWildCard(eStructuralFeature);
}
/** Returns true if the feature is a wildcard feature */
public static boolean isGroup(EStructuralFeature eStructuralFeature) {
return StoreUtil.isGroupFeature(eStructuralFeature);
}
/**
* Returns all the implementation classes which can be stored in a certain featuremap entry. Returns false if no impl. classes
* could be found
*/
private static boolean addExtensionImplementationClasses(Element element, boolean onlyEObject, boolean containment,
EAttribute eattr) {
ArrayList result = new ArrayList();
ArrayList featureResult = new ArrayList();
for (Iterator it = eattr.getEContainingClass().getEStructuralFeatures().iterator(); it.hasNext();) {
EStructuralFeature efeature = (EStructuralFeature) it.next();
if (containment && efeature instanceof EReference && !((EReference) efeature).isContainment()) {
continue;
}
if (!containment && onlyEObject && efeature instanceof EReference && ((EReference) efeature).isContainment()) {
continue;
}
if (StoreUtil.isElementOfGroup(efeature, eattr)) {
Class instanceClass = efeature.getEType().getInstanceClass();
if (!onlyEObject && !EObject.class.isAssignableFrom(instanceClass) && !String.class.isAssignableFrom(instanceClass)
&& efeature instanceof EAttribute) {
if (!result.contains(instanceClass.getName())) {
String name = instanceClass.getName();
if (name.indexOf('.') == -1) { // assume
log.warn("Primitive type " + name + " prepending java.lang.");
name = "java.lang." + name.substring(0, 1).toUpperCase() + name.substring(1);
}
result.add(name);
featureResult.add(efeature);
}
} else if (onlyEObject && efeature instanceof EReference) {
Class implClass = ERuntime.INSTANCE.getInstanceClass(((EReference) efeature).getEReferenceType());
if (implClass != null && !result.contains(implClass.getName())) {
result.add(implClass.getName());
featureResult.add(efeature);
}
}
}
}
// add extension to fieldelement
String[] implClasses = (String[]) result.toArray(new String[result.size()]);
EStructuralFeature[] features = (EStructuralFeature[]) featureResult.toArray(new EStructuralFeature[featureResult.size()]);
StringBuffer resultStr = new StringBuffer();
StringBuffer fResultStr = new StringBuffer();
boolean foundImpl = implClasses.length > 0;
if (implClasses.length > 0) {
for (int i = 0; i < implClasses.length; i++) {
if (resultStr.length() > 0) {
resultStr.append(",");
fResultStr.append(",");
}
resultStr.append(implClasses[i]);
fResultStr.append(features[i].getName());
}
} else {
if (onlyEObject) {
resultStr.append(AnyTypeEObject.class.getName());
} else {
resultStr.append(AnyTypeObject.class.getName());
}
}
element.addElement("extension").addAttribute("vendor-name", "jpox").addAttribute("key", "implementation-classes")
.addAttribute("value", resultStr.toString());
element.addElement("extension").addAttribute("vendor-name", "teneo").addAttribute("key", "estructuralfeatures")
.addAttribute("value", fResultStr.toString());
return foundImpl;
}
}
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