/*
 * 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.wayang.api.python.function;

import java.util.ArrayList;

import org.apache.wayang.api.python.executor.PythonWorkerManager;
import org.apache.wayang.core.function.PredicateDescriptor;
import org.apache.wayang.core.optimizer.ProbabilisticDoubleInterval;
import org.apache.wayang.core.optimizer.costs.LoadProfileEstimator;
import org.apache.wayang.core.types.BasicDataUnitType;

import com.google.protobuf.ByteString;

public class WrappedPredicateDescriptor<Input> extends PredicateDescriptor<Input> {

    public WrappedPredicateDescriptor(
            final ByteString serializedUDF,
            final BasicDataUnitType<Input> inputTypeClass,
            final ProbabilisticDoubleInterval selectivity,
            final LoadProfileEstimator udfLoad) {
        super(item -> {
            final ArrayList<Input> input = new ArrayList<>();
            input.add(item);
            final PythonWorkerManager<Input, Object> manager = new PythonWorkerManager<>(serializedUDF, input);
            final Iterable<Object> output = manager.execute();
            if (output.iterator().hasNext()) {
                final Object next = output.iterator().next();
                return next.equals(1);
            }
            return false;
        },
                inputTypeClass,
                selectivity,
                udfLoad);
    }
}
