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/*******************************************************************************
* Copyright (c) 2007 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.internal.context.persistence;
import java.util.List;
import java.util.ListIterator;
import org.eclipse.jpt.core.JpaStructureNode;
import org.eclipse.jpt.core.context.persistence.Persistence;
import org.eclipse.jpt.core.context.persistence.PersistenceStructureNodes;
import org.eclipse.jpt.core.context.persistence.PersistenceUnit;
import org.eclipse.jpt.core.context.persistence.PersistenceXml;
import org.eclipse.jpt.core.internal.context.AbstractXmlContextNode;
import org.eclipse.jpt.core.internal.validation.DefaultJpaValidationMessages;
import org.eclipse.jpt.core.internal.validation.JpaValidationMessages;
import org.eclipse.jpt.core.resource.persistence.PersistenceFactory;
import org.eclipse.jpt.core.resource.persistence.XmlPersistence;
import org.eclipse.jpt.core.resource.persistence.XmlPersistenceUnit;
import org.eclipse.jpt.core.utility.TextRange;
import org.eclipse.jpt.utility.internal.CollectionTools;
import org.eclipse.jpt.utility.internal.iterators.EmptyListIterator;
import org.eclipse.jpt.utility.internal.iterators.SingleElementListIterator;
import org.eclipse.wst.validation.internal.provisional.core.IMessage;
public class GenericPersistence extends AbstractXmlContextNode
implements Persistence
{
protected XmlPersistence xmlPersistence;
// the implementation here is a single persistence unit, although the API
// is for a list. we will want to support multiple persistence units soon.
protected PersistenceUnit persistenceUnit;
public GenericPersistence(PersistenceXml parent, XmlPersistence xmlPersistence) {
super(parent);
this.initialize(xmlPersistence);
}
public String getId() {
return PersistenceStructureNodes.PERSISTENCE_ID;
}
public XmlPersistence getXmlPersistence() {
return this.xmlPersistence;
}
@Override
public PersistenceXml getParent() {
return (PersistenceXml) super.getParent();
}
// **************** persistence units **************************************
public ListIterator<PersistenceUnit> persistenceUnits() {
return (this.persistenceUnit == null) ? EmptyListIterator.<PersistenceUnit>instance() : this.persistenceUnits_();
}
protected ListIterator<PersistenceUnit> persistenceUnits_() {
return new SingleElementListIterator<PersistenceUnit>(this.persistenceUnit);
}
public int persistenceUnitsSize() {
return (this.persistenceUnit == null) ? 0 : 1;
}
public PersistenceUnit addPersistenceUnit() {
return addPersistenceUnit(persistenceUnitsSize());
}
public PersistenceUnit addPersistenceUnit(int index) {
if (index > 0 || this.persistenceUnit != null) {
throw new IllegalStateException("This implementation does not support multiple persistence units."); //$NON-NLS-1$
}
XmlPersistenceUnit xmlPersistenceUnit = PersistenceFactory.eINSTANCE.createXmlPersistenceUnit();
this.persistenceUnit = createPersistenceUnit(xmlPersistenceUnit);
this.xmlPersistence.getPersistenceUnits().add(xmlPersistenceUnit);
fireItemAdded(PERSISTENCE_UNITS_LIST, index, this.persistenceUnit);
return this.persistenceUnit;
}
public void removePersistenceUnit(PersistenceUnit pu) {
if (pu != this.persistenceUnit) {
throw new IllegalArgumentException("Invalid persistence unit: " + pu); //$NON-NLS-1$
}
removePersistenceUnit(0);
}
public void removePersistenceUnit(int index) {
if (index > 0 || this.persistenceUnit == null) {
throw new IndexOutOfBoundsException("index: " + index); //$NON-NLS-1$
}
PersistenceUnit oldPersistenceUnit = this.persistenceUnit;
this.persistenceUnit.dispose();
this.persistenceUnit = null;
this.xmlPersistence.getPersistenceUnits().remove(index);
fireItemRemoved(PERSISTENCE_UNITS_LIST, index, oldPersistenceUnit);
}
protected void addPersistenceUnit_(PersistenceUnit newPersistenceUnit) {
this.persistenceUnit = newPersistenceUnit;
fireItemAdded(PERSISTENCE_UNITS_LIST, 0, this.persistenceUnit);
}
protected void removePersistenceUnit_(PersistenceUnit oldPersistenceUnit) {
this.persistenceUnit.dispose();
this.persistenceUnit = null;
fireItemRemoved(PERSISTENCE_UNITS_LIST, 0, oldPersistenceUnit);
}
// **************** updating ***********************************************
protected void initialize(XmlPersistence persistence) {
this.xmlPersistence = persistence;
initializePersistenceUnits(persistence);
}
protected void initializePersistenceUnits(XmlPersistence persistence) {
// only adding one here, until we support multiple persistence units
if (this.xmlPersistence.getPersistenceUnits().size() > 0) {
this.persistenceUnit = createPersistenceUnit(persistence.getPersistenceUnits().get(0));
}
}
public void update(XmlPersistence persistence) {
this.xmlPersistence = persistence;
XmlPersistenceUnit xmlPersistenceUnit = null;
if (persistence.getPersistenceUnits().size() > 0) {
xmlPersistenceUnit = persistence.getPersistenceUnits().get(0);
}
if (this.persistenceUnit != null) {
if (xmlPersistenceUnit != null) {
this.persistenceUnit.update(xmlPersistenceUnit);
}
else {
removePersistenceUnit_(this.persistenceUnit);
}
}
else {
if (xmlPersistenceUnit != null) {
addPersistenceUnit_(createPersistenceUnit(xmlPersistenceUnit));
}
}
}
protected PersistenceUnit createPersistenceUnit(XmlPersistenceUnit xmlPersistenceUnit) {
return getJpaFactory().buildPersistenceUnit(this, xmlPersistenceUnit);
}
// *************************************************************************
@Override
public PersistenceUnit getPersistenceUnit() {
throw new UnsupportedOperationException("No PersistenceUnit in this context"); //$NON-NLS-1$
}
public JpaStructureNode getStructureNode(int textOffset) {
for (PersistenceUnit pu : CollectionTools.iterable(persistenceUnits())) {
if (pu.containsOffset(textOffset)) {
return pu.getStructureNode(textOffset);
}
}
return this;
}
public boolean containsOffset(int textOffset) {
return (this.xmlPersistence == null) ? false : this.xmlPersistence.containsOffset(textOffset);
}
public TextRange getSelectionTextRange() {
return this.xmlPersistence.getSelectionTextRange();
}
public TextRange getValidationTextRange() {
return this.xmlPersistence.getValidationTextRange();
}
public void dispose() {
for (PersistenceUnit pu : CollectionTools.iterable(persistenceUnits())) {
pu.dispose();
}
}
// ********** validation **********
@Override
public void validate(List<IMessage> messages) {
super.validate(messages);
this.checkForMultiplePersistenceUnits(messages);
this.validatePersistenceUnit(messages);
}
/**
* extraneous persistence units can be
* accessed through the XmlPersistence resource object
*/
protected void checkForMultiplePersistenceUnits(List<IMessage> messages) {
if (this.xmlPersistence.getPersistenceUnits().size() > 1) {
messages.add(
DefaultJpaValidationMessages.buildMessage(
IMessage.NORMAL_SEVERITY,
JpaValidationMessages.PERSISTENCE_MULTIPLE_PERSISTENCE_UNITS,
this,
this.getValidationTextRange()
)
);
}
}
protected void validatePersistenceUnit(List<IMessage> messages) {
if (this.persistenceUnit == null) {
messages.add(
DefaultJpaValidationMessages.buildMessage(
IMessage.HIGH_SEVERITY,
JpaValidationMessages.PERSISTENCE_NO_PERSISTENCE_UNIT,
this,
this.getValidationTextRange()
)
);
return;
}
this.persistenceUnit.validate(messages);
}
}
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