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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:
* Cedric Dumoulin - cedric.dumoulin@lifl.fr
******************************************************************************/
package org.eclipse.papyrus.internal.infra.gmfdiag.layers.model.operators;
import org.eclipse.emf.common.util.EList;
import org.eclipse.papyrus.internal.infra.gmfdiag.layers.model.LayersException;
import org.eclipse.papyrus.internal.infra.gmfdiag.layers.model.command.ComputePropertyValueCommand;
import org.eclipse.papyrus.internal.infra.gmfdiag.layers.model.layers.BooleanInstance;
import org.eclipse.papyrus.internal.infra.gmfdiag.layers.model.layers.LayersFactory;
import org.eclipse.papyrus.internal.infra.gmfdiag.layers.model.layers.TypeInstance;
/**
* @author cedric dumoulin
*
*/
public class BooleanOrOperator implements CustomPropertyOperatorsInstance {
public static final BooleanInstance FALSE_INSTANCE;
public static final BooleanInstance TRUE_INSTANCE;
static {
FALSE_INSTANCE = LayersFactory.eINSTANCE.createBooleanInstance();
FALSE_INSTANCE.setValue(false);
TRUE_INSTANCE = LayersFactory.eINSTANCE.createBooleanInstance();
TRUE_INSTANCE.setValue(true);
}
/**
*
* @see org.eclipse.papyrus.internal.infra.gmfdiag.layers.model.operators.CustomPropertyOperatorsInstance#getComputePropertyValueCommand(org.eclipse.emf.common.util.EList)
*
* @param property
* @return
* @throws LayersException
*/
@Override
public ComputePropertyValueCommand getComputePropertyValueCommand(EList<ComputePropertyValueCommand> nestedCommand) throws LayersException {
return new BooleanOrOperatorCommand(nestedCommand);
}
/**
* Class implementing an And command.
*
*/
class BooleanOrOperatorCommand implements ComputePropertyValueCommand {
EList<ComputePropertyValueCommand> nestedCommand;
/**
*
* Constructor.
*
* @param nestedCommand
*/
public BooleanOrOperatorCommand(EList<ComputePropertyValueCommand> nestedCommand) {
this.nestedCommand = nestedCommand;
}
/**
* Compute the value.
*
* @see org.eclipse.papyrus.internal.infra.gmfdiag.layers.model.command.ComputePropertyValueCommand#getCmdValue()
*
* @return
* @throws LayersException
*/
@Override
public TypeInstance getCmdValue() throws LayersException {
// Do an boolean or: at least one value should be true.
// Return as soon as a true is encountered
for (ComputePropertyValueCommand curCmd : nestedCommand) {
boolean curCmdRes = ((BooleanInstance) curCmd.getCmdValue()).isValue();
if (curCmdRes == true) {
return TRUE_INSTANCE;
}
}
return FALSE_INSTANCE;
}
}
}
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