db.sql.api.impl.cmd.executor.DbSelectorCall Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of mybatis-mp-sql-api-impl Show documentation

There is a newer version: 1.7.6-RC2

Show newest version

package db.sql.api.impl.cmd.executor;

import db.sql.api.DbType;
import db.sql.api.impl.tookit.Objects;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.Callable;

public class DbSelectorCall implements SelectorCall {

    private final Map consumers = new HashMap<>();

    private Callable otherwise;

    @Override
    public DbSelectorCall when(DbType dbType, Callable runnable) {
        consumers.put(dbType, runnable);
        return this;
    }

    @Override
    public DbSelectorCall when(DbType[] dbTypes, Callable runnable) {
        for (DbType dbType : dbTypes) {
            consumers.put(dbType, runnable);
        }
        return this;
    }

    @Override
    public DbSelectorCall otherwise(Callable runnable) {
        if (Objects.nonNull(this.otherwise)) {
            throw new RuntimeException("The method of 'otherwise' has already called");
        }
        this.otherwise = runnable;
        return this;
    }

    @Override
    public DbSelectorCall otherwise() {
        return this.otherwise(() -> {
            return null;
        });
    }

    private R execute(Callable callable) {
        try {
            return callable.call();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public R dbExecute(DbType dbType) {
        Callable runnable = consumers.get(dbType);
        if (Objects.nonNull(runnable)) {
            return this.execute(runnable);
        }
        if (Objects.nonNull(this.otherwise)) {
            return this.execute(this.otherwise);
        }
        throw new RuntimeException("Not adapted to DbType " + dbType);
    }
}