/*
* Copyright (c) 2006-2009 by Abacus Research AG, Switzerland.
* All rights reserved.
*
* This file is part of the Abacus Formula Compiler (AFC).
*
* For commercial licensing, please contact sales(at)formulacompiler.com.
*
* AFC is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* AFC is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with AFC. If not, see <http://www.gnu.org/licenses/>.
*/
package org.formulacompiler.compiler.internal.model.optimizer.consteval;
import org.formulacompiler.compiler.CompilerException;
import org.formulacompiler.compiler.internal.expressions.ExpressionNodeForSwitch;
import org.formulacompiler.compiler.internal.expressions.ExpressionNodeForSwitchCase;
import org.formulacompiler.compiler.internal.expressions.TypedResult;
import org.formulacompiler.compiler.internal.model.interpreter.InterpretedNumericType;
final class EvalSwitch extends EvalShadow
{
public EvalSwitch( ExpressionNodeForSwitch _node, InterpretedNumericType _type )
{
super( _node, _type );
}
@Override
protected TypedResult eval() throws CompilerException
{
final ExpressionNodeForSwitch switchNode = (ExpressionNodeForSwitch) node();
final TypedResult valueArg = evaluateArgument( switchNode.offsetOfValueInArguments() );
if (valueArg.hasConstantValue()) {
final int value = type().toInt( valueArg.getConstantValue(), -1 );
if (value >= 0) {
final Iterable<ExpressionNodeForSwitchCase> cases = switchNode.cases();
int iCase = 0;
for (ExpressionNodeForSwitchCase caze : cases) {
if (value == caze.caseValue()) {
final EvalSwitchCase caseEval = (EvalSwitchCase) arguments().get(
iCase + switchNode.offsetOfCasesInArguments() );
final TypedResult caseResult = caseEval.evaluateArgument( 0, context() );
return caseResult;
}
iCase++;
}
}
return evaluateArgument( switchNode.offsetOfDefaultInArguments() );
}
return super.eval();
}
@Override
protected TypedResult evaluateToConst( TypedResult... _args ) throws CompilerException
{
return evaluateToNode( _args );
}
}