hazelcast-master/hazelcast-sql/src/main/java/com/hazelcast/jet/sql/impl/connector/file/CsvResolver.java
/*
 * Copyright 2023 Hazelcast Inc.
 *
 * Licensed under the Hazelcast Community License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://hazelcast.com/hazelcast-community-license
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hazelcast.jet.sql.impl.connector.file;

import com.hazelcast.sql.impl.schema.MappingField;
import com.hazelcast.sql.impl.type.QueryDataType;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

final class CsvResolver {

    private CsvResolver() {
    }

    static List<MappingField> resolveFields(Set<String> header) {
        Map<String, MappingField> fields = new LinkedHashMap<>();
        for (String name : header) {
            MappingField field = new MappingField(name, QueryDataType.VARCHAR);
            fields.putIfAbsent(field.name(), field);
        }
        return new ArrayList<>(fields.values());
    }
}
