seatunnel-transforms/seatunnel-transforms-flink/seatunnel-transform-flink-split/src/main/java/org/apache/seatunnel/flink/transform/ScalarSplit.java

/*
 * 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.seatunnel.flink.transform;

import org.apache.flink.api.common.typeinfo.TypeInformation;
import org.apache.flink.api.java.typeutils.RowTypeInfo;
import org.apache.flink.table.functions.ScalarFunction;
import org.apache.flink.types.Row;

public class ScalarSplit extends ScalarFunction {

    private RowTypeInfo rowTypeInfo;
    private int num;
    private String separator;

    public ScalarSplit(RowTypeInfo rowTypeInfo, int num, String separator) {
        this.rowTypeInfo = rowTypeInfo;
        this.num = num;
        this.separator = separator;
    }

    public Row eval(String str) {
        Row row = new Row(num);
        int i = 0;
        for (String s : str.split(separator, num)) {
            row.setField(i++, s);
        }
        return row;
    }

    @Override
    public TypeInformation<?> getResultType(Class<?>[] signature) {
        return rowTypeInfo;
    }
}