db.sql.api.cmd.executor.method.groupByMethod.IGroupByDatasetMethod Maven / Gradle / Ivy

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package db.sql.api.cmd.executor.method.groupByMethod;


import db.sql.api.Cmd;
import db.sql.api.cmd.basic.IDataset;
import db.sql.api.cmd.basic.IDatasetField;

import java.util.function.Function;

public interface IGroupByDatasetMethod {

    default , DATASET_FIELD extends IDatasetField> SELF groupBy(IDataset dataset, String columnName) {
        return this.groupBy(dataset, columnName, null);
    }

    default , DATASET_FIELD extends IDatasetField> SELF groupBy(boolean when, IDataset dataset, String columnName) {
        if (!when) {
            return (SELF) this;
        }
        return this.groupBy(dataset, columnName);
    }

    //---

    , DATASET_FIELD extends IDatasetField> SELF groupBy(IDataset dataset, String columnName, Function f);

    default , DATASET_FIELD extends IDatasetField> SELF groupBy(boolean when, IDataset dataset, String columnName, Function f) {
        if (!when) {
            return (SELF) this;
        }
        return this.groupBy(dataset, columnName, f);
    }
}