/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.amoro.flink.util;

import org.apache.amoro.shade.guava32.com.google.common.collect.Lists;
import org.apache.flink.table.expressions.ResolvedExpression;
import org.apache.iceberg.expressions.Expression;
import org.apache.iceberg.flink.FlinkFilters;

import java.util.List;
import java.util.Optional;

public class FilterUtil {

  public static IcebergAndFlinkFilters convertFlinkExpressToIceberg(
      List<ResolvedExpression> flinkFilters) {
    List<ResolvedExpression> acceptedFilters = Lists.newArrayList();
    List<Expression> expressions = Lists.newArrayList();

    for (ResolvedExpression resolvedExpression : flinkFilters) {
      Optional<Expression> icebergExpression = FlinkFilters.convert(resolvedExpression);
      if (icebergExpression.isPresent()) {
        expressions.add(icebergExpression.get());
        acceptedFilters.add(resolvedExpression);
      }
    }
    return IcebergAndFlinkFilters.of(expressions, acceptedFilters);
  }
}
