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    • com.jerolba.carpet.impl.write.FieldWriterConsumer Maven / Gradle / Ivy

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    /**
 * Copyright 2023 Jerónimo López Bezanilla
 *
 * Licensed 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 com.jerolba.carpet.impl.write;

import java.util.function.BiConsumer;
import java.util.function.Consumer;
import java.util.function.Function;

import org.apache.parquet.io.api.RecordConsumer;

class FieldWriterConsumer implements Consumer {

    private final RecordConsumer recordConsumer;
    private final String fieldName;
    private final int idx;
    private final Function accessor;
    private final BiConsumer writer;

    public FieldWriterConsumer(RecordConsumer recordConsumer, RecordField recordField,
            BiConsumer writer) {
        this.recordConsumer = recordConsumer;
        this.fieldName = recordField.fieldName();
        this.idx = recordField.idx();
        this.accessor = recordField.getAccessor();
        this.writer = writer;
    }

    @Override
    public void accept(Object object) {
        var value = accessor.apply(object);
        if (value != null) {
            recordConsumer.startField(fieldName, idx);
            writer.accept(recordConsumer, value);
            recordConsumer.endField(fieldName, idx);
        }
    }

}    
    
    
    

    




    
    
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