aswi2020vldc-gitlab/src/main/java/vldc/aswi/service/parameter/ParameterInConfigurationManagerImpl.java @ 621e3fca

package vldc.aswi.service.parameter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.context.event.EventListener;
import org.springframework.core.annotation.Order;
import org.springframework.dao.InvalidDataAccessResourceUsageException;
import org.springframework.stereotype.Service;
import vldc.aswi.dao.parameter.ParameterInConfigurationRepository;
import vldc.aswi.domain.Function;
import vldc.aswi.domain.parameter.ParameterInConfiguration;

import javax.transaction.Transactional;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;

/**
 * Manager for ParameterInConfiguration.
 */
@Service
@Slf4j
public class ParameterInConfigurationManagerImpl implements ParameterInConfigurationManager {

    /** Autowired parameter in configuration repository. */
    @Autowired
    private ParameterInConfigurationRepository parameterInConfigurationRepository;

    /**
     * Initialization setup for parameter in configuration manager.
     * Check if table "Parametr_konfigurace" exists.
     */
    @EventListener(classes = {
            ContextRefreshedEvent.class
    })
    @Order(4)
    @Transactional
    public void setup() {
        try {
            if (this.parameterInConfigurationRepository.count() == 0) {
                // Just checking if table exists.
            }
        }
        catch (InvalidDataAccessResourceUsageException e) {
            log.error("Table \"Parametr_konfigurace\" did not exists in database!");
            System.exit(1);
        }
    }

    /**
     * Get all parameter in configuration from database.
     * @return List of parameter in configuration.
     */
    @Override
    public List<ParameterInConfiguration> getAllParameterInConfiguration() {
        List<ParameterInConfiguration> retVal = new LinkedList<>();
        this.parameterInConfigurationRepository.findAll().forEach(retVal::add);
        return retVal;
    }

    /**
     * Delete all parameters in configuration by configuration id.
     * @param id - ID of parameter / configuration.
     * @return List of deleted parameters in configuration.
     */
    @Override
    public boolean deleteParametersInConfiguration(Long id, boolean configurationUsed) {
        try {
            List<ParameterInConfiguration> parameterInConfigurations = null;

            if (configurationUsed) {
                parameterInConfigurations = this.parameterInConfigurationRepository.getAllByConfigurationId(id);
            }
            else {
                parameterInConfigurations = this.parameterInConfigurationRepository.getAllByParameterId(id);
            }
            for (ParameterInConfiguration parameterInConfiguration : parameterInConfigurations) {
                boolean success = deleteParameterInConfiguration(parameterInConfiguration);
                if (!success) {
                    return false;
                }
            }

            // Delete all parameters in configuration.
            this.parameterInConfigurationRepository.deleteAll(parameterInConfigurations);
            return true;
        } catch (Exception e) {
            return  false;
        }
    }

    private boolean deleteParameterInConfiguration(ParameterInConfiguration parameterInConfiguration) {
        try {

            // Delete all functions used in current parameter in table 'Parametr_Konfigurace_ma_Funkce'.
            List<Function> functionList = new ArrayList<>(parameterInConfiguration.getFunctions());
            for (Function function : functionList) {
                parameterInConfiguration.removeFunction(function);
            }

            return true;
        }
        catch (Exception e) {

            return false;
        }
    }
}