Redo

public final class NestedFieldReferenceExpression implements ResolvedExpression {

    private final String[] fieldNames;

    private final int[] fieldIndices;

    private final DataType dataType;

    public NestedFieldReferenceExpression(
            String[] fieldNames,
			int[] fieldIndices,
            DataType dataType) {
        this.fieldNames = fieldNames;
		this.fieldIndices = fieldIndices;
        this.dataType = dataType;
    }

    public String[] getFieldNames() {
        return fieldNames;
    }

    public int[] getFieldIndices() {
        return fieldIndices;
    }

    @Override
    public DataType getOutputDataType() {
        return dataType;
    }
}