/*******************************************************************************
* Copyright (c) 1998, 2009 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Gordon Yorke - Initial development
*
******************************************************************************/
package org.eclipse.persistence.internal.jpa.querydef;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import javax.persistence.criteria.Root;
import javax.persistence.criteria.Selection;
import org.eclipse.persistence.expressions.Expression;
import org.eclipse.persistence.queries.ConstructorReportItem;
/**
* <p>
* <b>Purpose</b>: Contains the implementation of the Selection interface of the JPA
* criteria API. Specifically this class represents the Selection of a Constructor.
* <p>
* <b>Description</b>: The Selection is the expression describing what should be returned by the query.
* <p>
*
* @see javax.persistence.criteria Join
*
* @author gyorke
* @since EclipseLink 1.2
*/
public class ConstructorSelectionImpl<X> extends SelectionImpl<X> {
protected List<Selection<?>> subSelections;
public <T> ConstructorSelectionImpl(Class<X> javaType, Expression expressionNode){
super(javaType, expressionNode);
this.subSelections = new ArrayList<Selection<?>>();
}
@Override
public boolean isCompoundSelection(){
return true;
}
public void setSelections(List<Selection<?>> selections){
this.subSelections = selections;
}
public void setSelections(Selection<?>[] selections){
this.subSelections.clear();
for (Selection<?> selection : selections){
this.subSelections.add(selection);
}
}
/**
* Return selection items composing a compound selection
* @return list of selection items
* @throws IllegalStateException if selection is not a compound
* selection
*/
public List<Selection<?>> getCompoundSelectionItems(){
return this.subSelections;
}
public ConstructorReportItem translate(){
ConstructorReportItem item = new ConstructorReportItem(this.getAlias());
item.setResultType(this.getJavaType());
for(Selection selection : this.subSelections){
if (((SelectionImpl)selection).isCompoundSelection()){
item.addItem(((ConstructorSelectionImpl)selection).translate());
}else{
item.addAttribute(((SelectionImpl)selection).getCurrentNode());
}
}
return item;
}
public void findRoot(Set<Root<?>> roots){
for (Selection selection: getCompoundSelectionItems()){
((InternalSelection)selection).findRoot(roots);
}
}
}