service/src/main/java/io/mifos/portfolio/service/internal/util/AccountingAdapter.java - fineract-cn-portfolio - Git at Google

 /*
  * Copyright 2017 The Mifos Initiative.
  *
  * Licensed 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 io.mifos.portfolio.service.internal.util;

 import io.mifos.accounting.api.v1.client.AccountAlreadyExistsException;
 import io.mifos.accounting.api.v1.client.AccountNotFoundException;
 import io.mifos.accounting.api.v1.client.LedgerManager;
 import io.mifos.accounting.api.v1.client.LedgerNotFoundException;
 import io.mifos.accounting.api.v1.domain.*;
 import io.mifos.core.api.util.UserContextHolder;
 import io.mifos.core.lang.DateConverter;
 import io.mifos.core.lang.DateRange;
 import io.mifos.core.lang.ServiceException;
 import io.mifos.portfolio.api.v1.domain.AccountAssignment;
 import io.mifos.portfolio.api.v1.domain.ChargeDefinition;
 import io.mifos.portfolio.service.ServiceConstants;
 import org.apache.commons.lang.RandomStringUtils;
 import org.apache.commons.lang.StringUtils;
 import org.slf4j.Logger;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.stereotype.Component;

 import java.math.BigDecimal;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.ZoneId;
 import java.util.*;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;

 import static io.mifos.individuallending.api.v1.domain.product.AccountDesignators.ENTRY;

 /**
  * @author Myrle Krantz
  */
 @Component
 public class AccountingAdapter {


   public enum IdentifierType {LEDGER, ACCOUNT}

   private final LedgerManager ledgerManager;
   private final Logger logger;

   @Autowired
   public AccountingAdapter(@SuppressWarnings("SpringJavaAutowiringInspection") final LedgerManager ledgerManager,
                            @Qualifier(ServiceConstants.LOGGER_NAME) final Logger logger) {
     this.ledgerManager = ledgerManager;
     this.logger = logger;
   }

   public void bookCharges(final List<ChargeInstance> costComponents,
                           final String note,
                           final String transactionDate,
                           final String message,
                           final String transactionType) {
     final Set<Creditor> creditors = costComponents.stream()
             .map(AccountingAdapter::mapToCreditor)
             .filter(Optional::isPresent)
             .map(Optional::get)
             .collect(Collectors.toSet());
     final Set<Debtor> debtors = costComponents.stream()
             .map(AccountingAdapter::mapToDebtor)
             .filter(Optional::isPresent)
             .map(Optional::get)
             .collect(Collectors.toSet());

     if (creditors.isEmpty() && !debtors.isEmpty() ||
         debtors.isEmpty() && !creditors.isEmpty())
       throw ServiceException.internalError("either only creditors or only debtors were provided.");

     //noinspection ConstantConditions
     if (creditors.isEmpty() && debtors.isEmpty())
       return;

     final JournalEntry journalEntry = new JournalEntry();
     journalEntry.setCreditors(creditors);
     journalEntry.setDebtors(debtors);
     journalEntry.setClerk(UserContextHolder.checkedGetUser());
     journalEntry.setTransactionDate(transactionDate);
     journalEntry.setMessage(message);
     journalEntry.setTransactionType(transactionType);
     journalEntry.setNote(note);
     journalEntry.setTransactionIdentifier("portfolio." + message + "." + RandomStringUtils.random(26, true, true));

     ledgerManager.createJournalEntry(journalEntry);
   }

   public Optional<LocalDateTime> getDateOfOldestEntryContainingMessage(final String accountIdentifier,
                                                                        final String message) {
     final Account account = ledgerManager.findAccount(accountIdentifier);
     final LocalDateTime accountCreatedOn = DateConverter.fromIsoString(account.getCreatedOn());
     final DateRange fromAccountCreationUntilNow = oneSidedDateRange(accountCreatedOn.toLocalDate());

     return ledgerManager.fetchAccountEntriesStream(accountIdentifier, fromAccountCreationUntilNow.toString(), message, "ASC")
         .findFirst()
         .map(AccountEntry::getTransactionDate)
         .map(DateConverter::fromIsoString);
   }

   public Optional<LocalDateTime> getDateOfMostRecentEntryContainingMessage(
       final String accountIdentifier,
       final String message) {

     final Account account = ledgerManager.findAccount(accountIdentifier);
     final LocalDateTime accountCreatedOn = DateConverter.fromIsoString(account.getCreatedOn());
     final DateRange fromAccountCreationUntilNow = oneSidedDateRange(accountCreatedOn.toLocalDate());

     return ledgerManager.fetchAccountEntriesStream(accountIdentifier, fromAccountCreationUntilNow.toString(), message, "DESC")
         .findFirst()
         .map(AccountEntry::getTransactionDate)
         .map(DateConverter::fromIsoString);
   }

   public BigDecimal sumMatchingEntriesSinceDate(final String accountIdentifier, final LocalDate startDate, final String message)
   {
     final DateRange fromLastPaymentUntilNow = oneSidedDateRange(startDate);
     final Stream<AccountEntry> accountEntriesStream = ledgerManager.fetchAccountEntriesStream(accountIdentifier, fromLastPaymentUntilNow.toString(), message, "ASC");
     return accountEntriesStream
         .map(AccountEntry::getAmount)
         .map(BigDecimal::valueOf).reduce(BigDecimal.ZERO, BigDecimal::add);
   }

   private static Optional<Debtor> mapToDebtor(final ChargeInstance chargeInstance) {
     if (chargeInstance.getAmount().compareTo(BigDecimal.ZERO) == 0)
       return Optional.empty();

     final Debtor ret = new Debtor();
     ret.setAccountNumber(chargeInstance.getFromAccount());
     ret.setAmount(chargeInstance.getAmount().toPlainString());
     return Optional.of(ret);
   }

   private static Optional<Creditor> mapToCreditor(final ChargeInstance chargeInstance) {
     if (chargeInstance.getAmount().compareTo(BigDecimal.ZERO) == 0)
       return Optional.empty();

     final Creditor ret = new Creditor();
     ret.setAccountNumber(chargeInstance.getToAccount());
     ret.setAmount(chargeInstance.getAmount().toPlainString());
     return Optional.of(ret);
   }

   public BigDecimal getTotalOfCurrentAccountBalances(final String... accountIdentifiers) {
     return Arrays.stream(accountIdentifiers).map(this::getCurrentAccountBalance).reduce(BigDecimal.ZERO, BigDecimal::add);
   }

   public BigDecimal getCurrentAccountBalance(final String accountIdentifier) {
     try {
       final Account account = ledgerManager.findAccount(accountIdentifier);
       if (account == null)
         throw ServiceException.internalError("Could not find the account with identifier ''{0}''", accountIdentifier);
       return BigDecimal.valueOf(account.getBalance());
     }
     catch (final AccountNotFoundException e) {
      throw ServiceException.internalError("Could not find the account with identifier ''{0}''", accountIdentifier);
     }
   }
   public String createLedger(final String customerIdentifier, final String groupName, final String parentLedger) {
     final Ledger ledger = ledgerManager.findLedger(parentLedger);
     final List<Ledger> subLedgers = ledger.getSubLedgers() == null ? Collections.emptyList() : ledger.getSubLedgers();

     final Ledger generatedLedger = new Ledger();
     generatedLedger.setShowAccountsInChart(true);
     generatedLedger.setParentLedgerIdentifier(parentLedger);
     generatedLedger.setType(ledger.getType());
     final String ledgerIdentifer = createLedgerIdentifier(customerIdentifier, groupName, subLedgers);
     generatedLedger.setIdentifier(ledgerIdentifer);
     generatedLedger.setDescription("Individual loan case specific ledger");
     generatedLedger.setName(ledgerIdentifer);

     logger.info("Creating ledger with identifier '{}'", ledgerIdentifer);

     ledgerManager.createLedger(generatedLedger); //TODO: wait?
     return ledgerIdentifer;
   }

   public String createAccountForLedgerAssignment(final String customerIdentifier, final AccountAssignment ledgerAssignment) {
     final Ledger ledger = ledgerManager.findLedger(ledgerAssignment.getLedgerIdentifier());
     final AccountPage accountsOfLedger = ledgerManager.fetchAccountsOfLedger(ledger.getIdentifier(), null, null, null, null);

     final Account generatedAccount = new Account();
     generatedAccount.setBalance(0.0);
     generatedAccount.setType(ledger.getType());
     generatedAccount.setState(Account.State.OPEN.name());
     long guestimatedAccountIndex = accountsOfLedger.getTotalElements() + 1;
     generatedAccount.setLedger(ledger.getIdentifier());
     final Optional<String> createdAccountNumber =
         Stream.iterate(guestimatedAccountIndex, i -> i + 1).limit(99999 - guestimatedAccountIndex)
         .map(i -> {
           final String accountNumber = createAccountNumber(customerIdentifier, ledgerAssignment.getDesignator(), i);
           generatedAccount.setIdentifier(accountNumber);
           generatedAccount.setName(accountNumber);
           try {
             ledgerManager.createAccount(generatedAccount);
             return Optional.of(accountNumber);
           } catch (final AccountAlreadyExistsException e) {
             logger.error("Account '{}' could not be created because it already exists.", accountNumber);
             return Optional.<String>empty();
           }
         })
         .filter(Optional::isPresent).map(Optional::get)
         .findFirst();

     return createdAccountNumber.orElseThrow(() ->
         ServiceException.conflict("Failed to create an account for customer ''{0}'' and ''{1}'', in ledger ''{2}''.",
             customerIdentifier, ledgerAssignment.getDesignator(), ledgerAssignment.getLedgerIdentifier()));
   }

   private String createLedgerIdentifier(
       final String customerIdentifier,
       final String groupName,
       final List<Ledger> subLedgers) {
     final String partialCustomerIdentifer = StringUtils.left(customerIdentifier, 22);
     final String partialGroupName = StringUtils.left(groupName, 3);
     final Set<String> subLedgerIdentifiers = subLedgers.stream().map(Ledger::getIdentifier).collect(Collectors.toSet());
     long index = 0;
     while (true) {
       index++;
       final String generatedIdentifier = partialCustomerIdentifer + "." + partialGroupName + "." + String.format("%05d", index);
       if (!subLedgerIdentifiers.contains(generatedIdentifier))
         return generatedIdentifier;
     }
   }

   private String createAccountNumber(final String customerIdentifier, final String designator, final long accountIndex) {
     return StringUtils.left(customerIdentifier, 22) + "." + StringUtils.left(designator, 3)
             + "." + String.format("%05d", accountIndex);
   }


   public static Set<String> accountAssignmentsRequiredButNotProvided(
           final Set<AccountAssignment> accountAssignments,
           final List<ChargeDefinition> chargeDefinitionEntities) {
     final Set<String> allAccountDesignatorsRequired = getRequiredAccountDesignators(chargeDefinitionEntities);
     final Set<String> allAccountDesignatorsDefined = accountAssignments.stream().map(AccountAssignment::getDesignator)
             .collect(Collectors.toSet());
     if (allAccountDesignatorsDefined.containsAll(allAccountDesignatorsRequired))
       return Collections.emptySet();
     else {
       allAccountDesignatorsRequired.removeAll(allAccountDesignatorsDefined);
       return allAccountDesignatorsRequired;
     }
   }

   public static Set<String> getRequiredAccountDesignators(final Collection<ChargeDefinition> chargeDefinitionEntities) {
     return chargeDefinitionEntities.stream()
             .flatMap(AccountingAdapter::getAutomaticActionAccountDesignators)
             .filter(Objects::nonNull)
             .collect(Collectors.toSet());
   }

   private static Stream<String> getAutomaticActionAccountDesignators(final ChargeDefinition chargeDefinition) {
     final Stream.Builder<String> retBuilder = Stream.builder();

     checkAddDesignator(chargeDefinition.getFromAccountDesignator(), retBuilder);
     checkAddDesignator(chargeDefinition.getAccrualAccountDesignator(), retBuilder);
     checkAddDesignator(chargeDefinition.getToAccountDesignator(), retBuilder);

     return retBuilder.build();
   }

   private static void checkAddDesignator(final String accountDesignator, final Stream.Builder<String> retBuilder) {
     if (accountDesignator != null && !accountDesignator.equals(ENTRY))
       retBuilder.add(accountDesignator);
   }

   public Set<String> accountAssignmentsMappedToNonexistentAccounts(final Set<AccountAssignment> accountAssignments)
   {
     return accountAssignments.stream()
         .filter(x -> !accountAssignmentRepresentsRealAccount(x))
         .map(AccountAssignment::getDesignator)
         .collect(Collectors.toSet());
   }

   public boolean accountAssignmentRepresentsRealAccount(final AccountAssignment accountAssignment) {
     if (accountAssignment.getAccountIdentifier() != null) {
       try {
         ledgerManager.findAccount(accountAssignment.getAccountIdentifier());
         return true;
       }
       catch (final AccountNotFoundException e){
         return false;
       }
     }
     else if (accountAssignment.getLedgerIdentifier() != null) {
       try {
         ledgerManager.findLedger(accountAssignment.getLedgerIdentifier());
         return true;
       }
       catch (final LedgerNotFoundException e){
         return false;
       }
     }
     else
       return false;
   }

   private static DateRange oneSidedDateRange(final LocalDate start) {
     return new DateRange(start, LocalDate.now(ZoneId.of("UTC")));
   }
 }
	/*
	* Copyright 2017 The Mifos Initiative.
	*
	* Licensed 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 io.mifos.portfolio.service.internal.util;

	import io.mifos.accounting.api.v1.client.AccountAlreadyExistsException;
	import io.mifos.accounting.api.v1.client.AccountNotFoundException;
	import io.mifos.accounting.api.v1.client.LedgerManager;
	import io.mifos.accounting.api.v1.client.LedgerNotFoundException;
	import io.mifos.accounting.api.v1.domain.*;
	import io.mifos.core.api.util.UserContextHolder;
	import io.mifos.core.lang.DateConverter;
	import io.mifos.core.lang.DateRange;
	import io.mifos.core.lang.ServiceException;
	import io.mifos.portfolio.api.v1.domain.AccountAssignment;
	import io.mifos.portfolio.api.v1.domain.ChargeDefinition;
	import io.mifos.portfolio.service.ServiceConstants;
	import org.apache.commons.lang.RandomStringUtils;
	import org.apache.commons.lang.StringUtils;
	import org.slf4j.Logger;
	import org.springframework.beans.factory.annotation.Autowired;
	import org.springframework.beans.factory.annotation.Qualifier;
	import org.springframework.stereotype.Component;

	import java.math.BigDecimal;
	import java.time.LocalDate;
	import java.time.LocalDateTime;
	import java.time.ZoneId;
	import java.util.*;
	import java.util.stream.Collectors;
	import java.util.stream.Stream;

	import static io.mifos.individuallending.api.v1.domain.product.AccountDesignators.ENTRY;

	/**
	* @author Myrle Krantz
	*/
	@Component
	public class AccountingAdapter {


	public enum IdentifierType {LEDGER, ACCOUNT}

	private final LedgerManager ledgerManager;
	private final Logger logger;

	@Autowired
	public AccountingAdapter(@SuppressWarnings("SpringJavaAutowiringInspection") final LedgerManager ledgerManager,
	@Qualifier(ServiceConstants.LOGGER_NAME) final Logger logger) {
	this.ledgerManager = ledgerManager;
	this.logger = logger;
	}

	public void bookCharges(final List<ChargeInstance> costComponents,
	final String note,
	final String transactionDate,
	final String message,
	final String transactionType) {
	final Set<Creditor> creditors = costComponents.stream()
	.map(AccountingAdapter::mapToCreditor)
	.filter(Optional::isPresent)
	.map(Optional::get)
	.collect(Collectors.toSet());
	final Set<Debtor> debtors = costComponents.stream()
	.map(AccountingAdapter::mapToDebtor)
	.filter(Optional::isPresent)
	.map(Optional::get)
	.collect(Collectors.toSet());

	if (creditors.isEmpty() && !debtors.isEmpty() \|\|
	debtors.isEmpty() && !creditors.isEmpty())
	throw ServiceException.internalError("either only creditors or only debtors were provided.");

	//noinspection ConstantConditions
	if (creditors.isEmpty() && debtors.isEmpty())
	return;

	final JournalEntry journalEntry = new JournalEntry();
	journalEntry.setCreditors(creditors);
	journalEntry.setDebtors(debtors);
	journalEntry.setClerk(UserContextHolder.checkedGetUser());
	journalEntry.setTransactionDate(transactionDate);
	journalEntry.setMessage(message);
	journalEntry.setTransactionType(transactionType);
	journalEntry.setNote(note);
	journalEntry.setTransactionIdentifier("portfolio." + message + "." + RandomStringUtils.random(26, true, true));

	ledgerManager.createJournalEntry(journalEntry);
	}

	public Optional<LocalDateTime> getDateOfOldestEntryContainingMessage(final String accountIdentifier,
	final String message) {
	final Account account = ledgerManager.findAccount(accountIdentifier);
	final LocalDateTime accountCreatedOn = DateConverter.fromIsoString(account.getCreatedOn());
	final DateRange fromAccountCreationUntilNow = oneSidedDateRange(accountCreatedOn.toLocalDate());

	return ledgerManager.fetchAccountEntriesStream(accountIdentifier, fromAccountCreationUntilNow.toString(), message, "ASC")
	.findFirst()
	.map(AccountEntry::getTransactionDate)
	.map(DateConverter::fromIsoString);
	}

	public Optional<LocalDateTime> getDateOfMostRecentEntryContainingMessage(
	final String accountIdentifier,
	final String message) {

	final Account account = ledgerManager.findAccount(accountIdentifier);
	final LocalDateTime accountCreatedOn = DateConverter.fromIsoString(account.getCreatedOn());
	final DateRange fromAccountCreationUntilNow = oneSidedDateRange(accountCreatedOn.toLocalDate());

	return ledgerManager.fetchAccountEntriesStream(accountIdentifier, fromAccountCreationUntilNow.toString(), message, "DESC")
	.findFirst()
	.map(AccountEntry::getTransactionDate)
	.map(DateConverter::fromIsoString);
	}

	public BigDecimal sumMatchingEntriesSinceDate(final String accountIdentifier, final LocalDate startDate, final String message)
	{
	final DateRange fromLastPaymentUntilNow = oneSidedDateRange(startDate);
	final Stream<AccountEntry> accountEntriesStream = ledgerManager.fetchAccountEntriesStream(accountIdentifier, fromLastPaymentUntilNow.toString(), message, "ASC");
	return accountEntriesStream
	.map(AccountEntry::getAmount)
	.map(BigDecimal::valueOf).reduce(BigDecimal.ZERO, BigDecimal::add);
	}

	private static Optional<Debtor> mapToDebtor(final ChargeInstance chargeInstance) {
	if (chargeInstance.getAmount().compareTo(BigDecimal.ZERO) == 0)
	return Optional.empty();

	final Debtor ret = new Debtor();
	ret.setAccountNumber(chargeInstance.getFromAccount());
	ret.setAmount(chargeInstance.getAmount().toPlainString());
	return Optional.of(ret);
	}

	private static Optional<Creditor> mapToCreditor(final ChargeInstance chargeInstance) {
	if (chargeInstance.getAmount().compareTo(BigDecimal.ZERO) == 0)
	return Optional.empty();

	final Creditor ret = new Creditor();
	ret.setAccountNumber(chargeInstance.getToAccount());
	ret.setAmount(chargeInstance.getAmount().toPlainString());
	return Optional.of(ret);
	}

	public BigDecimal getTotalOfCurrentAccountBalances(final String... accountIdentifiers) {
	return Arrays.stream(accountIdentifiers).map(this::getCurrentAccountBalance).reduce(BigDecimal.ZERO, BigDecimal::add);
	}

	public BigDecimal getCurrentAccountBalance(final String accountIdentifier) {
	try {
	final Account account = ledgerManager.findAccount(accountIdentifier);
	if (account == null)
	throw ServiceException.internalError("Could not find the account with identifier ''{0}''", accountIdentifier);
	return BigDecimal.valueOf(account.getBalance());
	}
	catch (final AccountNotFoundException e) {
	throw ServiceException.internalError("Could not find the account with identifier ''{0}''", accountIdentifier);
	}
	}
	public String createLedger(final String customerIdentifier, final String groupName, final String parentLedger) {
	final Ledger ledger = ledgerManager.findLedger(parentLedger);
	final List<Ledger> subLedgers = ledger.getSubLedgers() == null ? Collections.emptyList() : ledger.getSubLedgers();

	final Ledger generatedLedger = new Ledger();
	generatedLedger.setShowAccountsInChart(true);
	generatedLedger.setParentLedgerIdentifier(parentLedger);
	generatedLedger.setType(ledger.getType());
	final String ledgerIdentifer = createLedgerIdentifier(customerIdentifier, groupName, subLedgers);
	generatedLedger.setIdentifier(ledgerIdentifer);
	generatedLedger.setDescription("Individual loan case specific ledger");
	generatedLedger.setName(ledgerIdentifer);

	logger.info("Creating ledger with identifier '{}'", ledgerIdentifer);

	ledgerManager.createLedger(generatedLedger); //TODO: wait?
	return ledgerIdentifer;
	}

	public String createAccountForLedgerAssignment(final String customerIdentifier, final AccountAssignment ledgerAssignment) {
	final Ledger ledger = ledgerManager.findLedger(ledgerAssignment.getLedgerIdentifier());
	final AccountPage accountsOfLedger = ledgerManager.fetchAccountsOfLedger(ledger.getIdentifier(), null, null, null, null);

	final Account generatedAccount = new Account();
	generatedAccount.setBalance(0.0);
	generatedAccount.setType(ledger.getType());
	generatedAccount.setState(Account.State.OPEN.name());
	long guestimatedAccountIndex = accountsOfLedger.getTotalElements() + 1;
	generatedAccount.setLedger(ledger.getIdentifier());
	final Optional<String> createdAccountNumber =
	Stream.iterate(guestimatedAccountIndex, i -> i + 1).limit(99999 - guestimatedAccountIndex)
	.map(i -> {
	final String accountNumber = createAccountNumber(customerIdentifier, ledgerAssignment.getDesignator(), i);
	generatedAccount.setIdentifier(accountNumber);
	generatedAccount.setName(accountNumber);
	try {
	ledgerManager.createAccount(generatedAccount);
	return Optional.of(accountNumber);
	} catch (final AccountAlreadyExistsException e) {
	logger.error("Account '{}' could not be created because it already exists.", accountNumber);
	return Optional.<String>empty();
	}
	})
	.filter(Optional::isPresent).map(Optional::get)
	.findFirst();

	return createdAccountNumber.orElseThrow(() ->
	ServiceException.conflict("Failed to create an account for customer ''{0}'' and ''{1}'', in ledger ''{2}''.",
	customerIdentifier, ledgerAssignment.getDesignator(), ledgerAssignment.getLedgerIdentifier()));
	}

	private String createLedgerIdentifier(
	final String customerIdentifier,
	final String groupName,
	final List<Ledger> subLedgers) {
	final String partialCustomerIdentifer = StringUtils.left(customerIdentifier, 22);
	final String partialGroupName = StringUtils.left(groupName, 3);
	final Set<String> subLedgerIdentifiers = subLedgers.stream().map(Ledger::getIdentifier).collect(Collectors.toSet());
	long index = 0;
	while (true) {
	index++;
	final String generatedIdentifier = partialCustomerIdentifer + "." + partialGroupName + "." + String.format("%05d", index);
	if (!subLedgerIdentifiers.contains(generatedIdentifier))
	return generatedIdentifier;
	}
	}

	private String createAccountNumber(final String customerIdentifier, final String designator, final long accountIndex) {
	return StringUtils.left(customerIdentifier, 22) + "." + StringUtils.left(designator, 3)
	+ "." + String.format("%05d", accountIndex);
	}


	public static Set<String> accountAssignmentsRequiredButNotProvided(
	final Set<AccountAssignment> accountAssignments,
	final List<ChargeDefinition> chargeDefinitionEntities) {
	final Set<String> allAccountDesignatorsRequired = getRequiredAccountDesignators(chargeDefinitionEntities);
	final Set<String> allAccountDesignatorsDefined = accountAssignments.stream().map(AccountAssignment::getDesignator)
	.collect(Collectors.toSet());
	if (allAccountDesignatorsDefined.containsAll(allAccountDesignatorsRequired))
	return Collections.emptySet();
	else {
	allAccountDesignatorsRequired.removeAll(allAccountDesignatorsDefined);
	return allAccountDesignatorsRequired;
	}
	}

	public static Set<String> getRequiredAccountDesignators(final Collection<ChargeDefinition> chargeDefinitionEntities) {
	return chargeDefinitionEntities.stream()
	.flatMap(AccountingAdapter::getAutomaticActionAccountDesignators)
	.filter(Objects::nonNull)
	.collect(Collectors.toSet());
	}

	private static Stream<String> getAutomaticActionAccountDesignators(final ChargeDefinition chargeDefinition) {
	final Stream.Builder<String> retBuilder = Stream.builder();

	checkAddDesignator(chargeDefinition.getFromAccountDesignator(), retBuilder);
	checkAddDesignator(chargeDefinition.getAccrualAccountDesignator(), retBuilder);
	checkAddDesignator(chargeDefinition.getToAccountDesignator(), retBuilder);

	return retBuilder.build();
	}

	private static void checkAddDesignator(final String accountDesignator, final Stream.Builder<String> retBuilder) {
	if (accountDesignator != null && !accountDesignator.equals(ENTRY))
	retBuilder.add(accountDesignator);
	}

	public Set<String> accountAssignmentsMappedToNonexistentAccounts(final Set<AccountAssignment> accountAssignments)
	{
	return accountAssignments.stream()
	.filter(x -> !accountAssignmentRepresentsRealAccount(x))
	.map(AccountAssignment::getDesignator)
	.collect(Collectors.toSet());
	}

	public boolean accountAssignmentRepresentsRealAccount(final AccountAssignment accountAssignment) {
	if (accountAssignment.getAccountIdentifier() != null) {
	try {
	ledgerManager.findAccount(accountAssignment.getAccountIdentifier());
	return true;
	}
	catch (final AccountNotFoundException e){
	return false;
	}
	}
	else if (accountAssignment.getLedgerIdentifier() != null) {
	try {
	ledgerManager.findLedger(accountAssignment.getLedgerIdentifier());
	return true;
	}
	catch (final LedgerNotFoundException e){
	return false;
	}
	}
	else
	return false;
	}

	private static DateRange oneSidedDateRange(final LocalDate start) {
	return new DateRange(start, LocalDate.now(ZoneId.of("UTC")));
	}
	}