asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/CastRecordResultTypeComputer.java

package edu.uci.ics.asterix.om.typecomputer.impl;

import edu.uci.ics.asterix.om.typecomputer.base.IResultTypeComputer;
import edu.uci.ics.asterix.om.typecomputer.base.TypeComputerUtilities;
import edu.uci.ics.asterix.om.types.IAType;
import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.ScalarFunctionCallExpression;
import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;

public class CastRecordResultTypeComputer implements IResultTypeComputer {

    public static final CastRecordResultTypeComputer INSTANCE = new CastRecordResultTypeComputer();

    @Override
    public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
            IMetadataProvider<?, ?> metadataProvider) throws AlgebricksException {
        ScalarFunctionCallExpression funcExpr = (ScalarFunctionCallExpression) expression;
        return TypeComputerUtilities.getRequiredType(funcExpr);
    }
}