/*******************************************************************************
* Copyright © 2011, 2013 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*
*******************************************************************************/
package org.eclipse.edt.mof.egl.impl;
import java.util.List;
import org.eclipse.edt.mof.egl.Classifier;
import org.eclipse.edt.mof.egl.Expression;
import org.eclipse.edt.mof.egl.Function;
import org.eclipse.edt.mof.egl.MultiOperandExpression;
import org.eclipse.edt.mof.egl.Name;
import org.eclipse.edt.mof.egl.NamedElement;
import org.eclipse.edt.mof.egl.NoSuchFunctionError;
import org.eclipse.edt.mof.egl.Operation;
import org.eclipse.edt.mof.egl.Type;
public abstract class MultiOperandExpressionImpl extends ExpressionImpl implements MultiOperandExpression{
private static int Slot_operands=0;
private static int Slot_operator=1;
private static int Slot_operation=2;
private static int totalSlots = 3;
public static int totalSlots() {
return totalSlots + ExpressionImpl.totalSlots();
}
static {
int offset = ExpressionImpl.totalSlots();
Slot_operands += offset;
Slot_operator += offset;
Slot_operation += offset;
}
@Override
public Operation getOperation() {
if (slotGet(Slot_operation) == null) {
try {
setOperation(resolveOperation());
} catch (NoSuchFunctionError e) {
throw new RuntimeException(e);
}
}
return (Operation)slotGet(Slot_operation);
}
@Override
public boolean isNullable() {
return getOperation().isNullable();
}
@Override
public void setOperation(Operation value) {
slotSet(Slot_operation, value);
}
@Override
public Type getType() {
return getOperation().getType();
}
@Override
public String getOperator() {
return (String)slotGet(Slot_operator);
}
@Override
public void setOperator(String opSymbol) {
slotSet(Slot_operator, opSymbol);
}
@SuppressWarnings("unchecked")
@Override
public List<Expression> getOperands() {
return (List<Expression>)slotGet(Slot_operands);
}
protected abstract Operation resolveOperation();
protected NamedElement getOperandType(Expression expr) {
if (expr instanceof Name && ((Name)expr).getNamedElement() instanceof Function) {
return (Function) ((Name)expr).getNamedElement();
}
else {
return (Classifier)expr.getType().getClassifier();
}
}
}