/*
 * Copyright (c) 2019 the Eclipse Milo Authors
 *
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 */

package org.eclipse.milo.opcua.sdk.server.events.operators;

import org.eclipse.milo.opcua.sdk.server.events.FilterContext;
import org.eclipse.milo.opcua.sdk.server.events.OperatorContext;
import org.eclipse.milo.opcua.sdk.server.events.ValidationException;
import org.eclipse.milo.opcua.sdk.server.model.nodes.objects.BaseEventTypeNode;
import org.eclipse.milo.opcua.stack.core.UaException;
import org.eclipse.milo.opcua.stack.core.types.structured.FilterOperand;
import org.jetbrains.annotations.Nullable;

public interface Operator<T> {

    void validate(FilterContext context, FilterOperand[] operands) throws ValidationException;

    @Nullable
    T apply(
        OperatorContext context,
        BaseEventTypeNode eventNode,
        FilterOperand[] operands) throws UaException;

}
