Java tutorial
/** * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this file, * You can obtain one at http://mozilla.org/MPL/2.0/. */ package org.mifosplatform.portfolio.loanaccount.rescheduleloan.data; import java.lang.reflect.Type; import java.util.ArrayList; import java.util.List; import java.util.Map; import org.apache.commons.lang.StringUtils; import org.joda.time.LocalDate; import org.mifosplatform.infrastructure.core.api.JsonCommand; import org.mifosplatform.infrastructure.core.data.ApiParameterError; import org.mifosplatform.infrastructure.core.data.DataValidatorBuilder; import org.mifosplatform.infrastructure.core.exception.InvalidJsonException; import org.mifosplatform.infrastructure.core.exception.PlatformApiDataValidationException; import org.mifosplatform.infrastructure.core.serialization.FromJsonHelper; import org.mifosplatform.portfolio.loanaccount.domain.Loan; import org.mifosplatform.portfolio.loanaccount.domain.LoanRepaymentScheduleInstallment; import org.mifosplatform.portfolio.loanaccount.domain.LoanStatus; import org.mifosplatform.portfolio.loanaccount.rescheduleloan.RescheduleLoansApiConstants; import org.mifosplatform.portfolio.loanaccount.rescheduleloan.domain.LoanRescheduleRequest; import org.mifosplatform.portfolio.loanaccount.rescheduleloan.service.LoanRescheduleRequestReadPlatformService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import com.google.gson.JsonElement; import com.google.gson.reflect.TypeToken; @Component public class LoanRescheduleRequestDataValidator { private final FromJsonHelper fromJsonHelper; private final LoanRescheduleRequestReadPlatformService loanRescheduleRequestReadPlatformService; @Autowired public LoanRescheduleRequestDataValidator(FromJsonHelper fromJsonHelper, LoanRescheduleRequestReadPlatformService loanRescheduleRequestReadPlatformService) { this.fromJsonHelper = fromJsonHelper; this.loanRescheduleRequestReadPlatformService = loanRescheduleRequestReadPlatformService; } /** * Validates the request to create a new loan reschedule entry * * @param jsonCommand * the JSON command object (instance of the JsonCommand class) * @return void **/ public void validateForCreateAction(final JsonCommand jsonCommand, final Loan loan) { final String jsonString = jsonCommand.json(); if (StringUtils.isBlank(jsonString)) { throw new InvalidJsonException(); } final Type typeToken = new TypeToken<Map<String, Object>>() { }.getType(); this.fromJsonHelper.checkForUnsupportedParameters(typeToken, jsonString, RescheduleLoansApiConstants.CREATE_REQUEST_DATA_PARAMETERS); final List<ApiParameterError> dataValidationErrors = new ArrayList<>(); final DataValidatorBuilder dataValidatorBuilder = new DataValidatorBuilder(dataValidationErrors) .resource(StringUtils.lowerCase(RescheduleLoansApiConstants.ENTITY_NAME)); final JsonElement jsonElement = jsonCommand.parsedJson(); if (!loan.status().isActive()) { dataValidatorBuilder.reset().failWithCodeNoParameterAddedToErrorCode("loan.is.not.active", "Loan is not active"); } final Long loanId = this.fromJsonHelper.extractLongNamed(RescheduleLoansApiConstants.loanIdParamName, jsonElement); dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.loanIdParamName).value(loanId).notNull() .integerGreaterThanZero(); final LocalDate submittedOnDate = this.fromJsonHelper .extractLocalDateNamed(RescheduleLoansApiConstants.submittedOnDateParamName, jsonElement); dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.submittedOnDateParamName) .value(submittedOnDate).notNull(); if (submittedOnDate != null && loan.getDisbursementDate().isAfter(submittedOnDate)) { dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.submittedOnDateParamName) .failWithCode("before.loan.disbursement.date", "Submission date cannot be before the loan disbursement date"); } final LocalDate rescheduleFromDate = this.fromJsonHelper .extractLocalDateNamed(RescheduleLoansApiConstants.rescheduleFromDateParamName, jsonElement); dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.rescheduleFromDateParamName) .value(rescheduleFromDate).notNull(); final Integer graceOnPrincipal = this.fromJsonHelper .extractIntegerWithLocaleNamed(RescheduleLoansApiConstants.graceOnPrincipalParamName, jsonElement); dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.graceOnPrincipalParamName) .value(graceOnPrincipal).ignoreIfNull().integerGreaterThanZero(); final Integer graceOnInterest = this.fromJsonHelper .extractIntegerWithLocaleNamed(RescheduleLoansApiConstants.graceOnInterestParamName, jsonElement); dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.graceOnInterestParamName) .value(graceOnInterest).ignoreIfNull().integerGreaterThanZero(); final Integer extraTerms = this.fromJsonHelper .extractIntegerWithLocaleNamed(RescheduleLoansApiConstants.extraTermsParamName, jsonElement); dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.extraTermsParamName).value(extraTerms) .ignoreIfNull().integerGreaterThanZero(); final Long rescheduleReasonId = this.fromJsonHelper .extractLongNamed(RescheduleLoansApiConstants.rescheduleReasonIdParamName, jsonElement); dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.rescheduleReasonIdParamName) .value(rescheduleReasonId).notNull().integerGreaterThanZero(); final String rescheduleReasonComment = this.fromJsonHelper .extractStringNamed(RescheduleLoansApiConstants.rescheduleReasonCommentParamName, jsonElement); dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.rescheduleReasonCommentParamName) .value(rescheduleReasonComment).ignoreIfNull().notExceedingLengthOf(500); final LocalDate adjustedDueDate = this.fromJsonHelper .extractLocalDateNamed(RescheduleLoansApiConstants.adjustedDueDateParamName, jsonElement); if (adjustedDueDate != null && rescheduleFromDate != null && adjustedDueDate.isBefore(rescheduleFromDate)) { dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.rescheduleFromDateParamName) .failWithCode("adjustedDueDate.before.rescheduleFromDate", "Adjusted due date cannot be before the reschedule from date"); } // at least one of the following must be provided => graceOnPrincipal, // graceOnInterest, extraTerms, newInterestRate if (!this.fromJsonHelper.parameterExists(RescheduleLoansApiConstants.graceOnPrincipalParamName, jsonElement) && !this.fromJsonHelper.parameterExists(RescheduleLoansApiConstants.graceOnInterestParamName, jsonElement) && !this.fromJsonHelper.parameterExists(RescheduleLoansApiConstants.extraTermsParamName, jsonElement) && !this.fromJsonHelper.parameterExists(RescheduleLoansApiConstants.newInterestRateParamName, jsonElement) && !this.fromJsonHelper.parameterExists(RescheduleLoansApiConstants.adjustedDueDateParamName, jsonElement)) { dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.graceOnPrincipalParamName).notNull(); } if (rescheduleFromDate != null) { LoanRepaymentScheduleInstallment installment = loan.getRepaymentScheduleInstallment(rescheduleFromDate); if (installment == null) { dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.rescheduleFromDateParamName) .failWithCode("repayment.schedule.installment.does.not.exist", "Repayment schedule installment does not exist"); } if (installment != null && installment.isObligationsMet()) { dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.rescheduleFromDateParamName) .failWithCode("repayment.schedule.installment.obligation.met", "Repayment schedule installment obligation met"); } if (installment != null && installment.isPartlyPaid()) { dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.rescheduleFromDateParamName) .failWithCode("repayment.schedule.installment.partly.paid", "Repayment schedule installment is partly paid"); } } if (loanId != null) { List<LoanRescheduleRequestData> loanRescheduleRequestData = this.loanRescheduleRequestReadPlatformService .readLoanRescheduleRequests(loanId, LoanStatus.APPROVED.getValue()); if (loanRescheduleRequestData.size() > 0) { dataValidatorBuilder.reset().failWithCodeNoParameterAddedToErrorCode("loan.already.rescheduled", "The loan can only be rescheduled once."); } } if (!dataValidationErrors.isEmpty()) { throw new PlatformApiDataValidationException(dataValidationErrors); } } /** * Validates a user request to approve a loan reschedule request * * @param jsonCommand * the JSON command object (instance of the JsonCommand class) * @return void **/ public void validateForApproveAction(final JsonCommand jsonCommand, LoanRescheduleRequest loanRescheduleRequest) { final String jsonString = jsonCommand.json(); if (StringUtils.isBlank(jsonString)) { throw new InvalidJsonException(); } final Type typeToken = new TypeToken<Map<String, Object>>() { }.getType(); this.fromJsonHelper.checkForUnsupportedParameters(typeToken, jsonString, RescheduleLoansApiConstants.APPROVE_REQUEST_DATA_PARAMETERS); final List<ApiParameterError> dataValidationErrors = new ArrayList<>(); final DataValidatorBuilder dataValidatorBuilder = new DataValidatorBuilder(dataValidationErrors) .resource(StringUtils.lowerCase(RescheduleLoansApiConstants.ENTITY_NAME)); final JsonElement jsonElement = jsonCommand.parsedJson(); final LocalDate approvedOnDate = this.fromJsonHelper .extractLocalDateNamed(RescheduleLoansApiConstants.approvedOnDateParam, jsonElement); dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.approvedOnDateParam) .value(approvedOnDate).notNull(); if (approvedOnDate != null && loanRescheduleRequest.getSubmittedOnDate().isAfter(approvedOnDate)) { dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.approvedOnDateParam).failWithCode( "before.submission.date", "Approval date cannot be before the request submission date."); } LoanRescheduleRequestStatusEnumData loanRescheduleRequestStatusEnumData = LoanRescheduleRequestEnumerations .status(loanRescheduleRequest.getStatusEnum()); if (!loanRescheduleRequestStatusEnumData.isPendingApproval()) { dataValidatorBuilder.reset().failWithCodeNoParameterAddedToErrorCode( "request.is.not.in.submitted.and.pending.state", "Loan reschedule request approval is not allowed. " + "Loan reschedule request is not in submitted and pending approval state."); } LocalDate rescheduleFromDate = loanRescheduleRequest.getRescheduleFromDate(); final Loan loan = loanRescheduleRequest.getLoan(); if (loan != null) { Long loanId = loan.getId(); if (!loan.status().isActive()) { dataValidatorBuilder.reset().failWithCodeNoParameterAddedToErrorCode("loan.is.not.active", "Loan is not active"); } if (rescheduleFromDate != null) { LoanRepaymentScheduleInstallment installment = loan .getRepaymentScheduleInstallment(rescheduleFromDate); if (installment == null) { dataValidatorBuilder.reset().failWithCodeNoParameterAddedToErrorCode( "loan.repayment.schedule.installment.does.not.exist", "Repayment schedule installment does not exist"); } if (installment != null && installment.isObligationsMet()) { dataValidatorBuilder.reset().failWithCodeNoParameterAddedToErrorCode( "loan.repayment.schedule.installment." + "obligation.met", "Repayment schedule installment obligation met"); } } if (loanId != null) { List<LoanRescheduleRequestData> loanRescheduleRequestData = this.loanRescheduleRequestReadPlatformService .readLoanRescheduleRequests(loanId, LoanStatus.APPROVED.getValue()); if (loanRescheduleRequestData.size() > 0) { dataValidatorBuilder.reset().failWithCodeNoParameterAddedToErrorCode("loan.already.rescheduled", "The loan can only be rescheduled once."); } } } if (!dataValidationErrors.isEmpty()) { throw new PlatformApiDataValidationException(dataValidationErrors); } } /** * Validates a user request to reject a loan reschedule request * * @param jsonCommand * the JSON command object (instance of the JsonCommand class) * @return void **/ public void validateForRejectAction(final JsonCommand jsonCommand, LoanRescheduleRequest loanRescheduleRequest) { final String jsonString = jsonCommand.json(); if (StringUtils.isBlank(jsonString)) { throw new InvalidJsonException(); } final Type typeToken = new TypeToken<Map<String, Object>>() { }.getType(); this.fromJsonHelper.checkForUnsupportedParameters(typeToken, jsonString, RescheduleLoansApiConstants.REJECT_REQUEST_DATA_PARAMETERS); final List<ApiParameterError> dataValidationErrors = new ArrayList<>(); final DataValidatorBuilder dataValidatorBuilder = new DataValidatorBuilder(dataValidationErrors) .resource(StringUtils.lowerCase(RescheduleLoansApiConstants.ENTITY_NAME)); final JsonElement jsonElement = jsonCommand.parsedJson(); final LocalDate rejectedOnDate = this.fromJsonHelper .extractLocalDateNamed(RescheduleLoansApiConstants.rejectedOnDateParam, jsonElement); dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.rejectedOnDateParam) .value(rejectedOnDate).notNull(); if (rejectedOnDate != null && loanRescheduleRequest.getSubmittedOnDate().isAfter(rejectedOnDate)) { dataValidatorBuilder.reset().parameter(RescheduleLoansApiConstants.rejectedOnDateParam).failWithCode( "before.submission.date", "Rejection date cannot be before the request submission date."); } LoanRescheduleRequestStatusEnumData loanRescheduleRequestStatusEnumData = LoanRescheduleRequestEnumerations .status(loanRescheduleRequest.getStatusEnum()); if (!loanRescheduleRequestStatusEnumData.isPendingApproval()) { dataValidatorBuilder.reset().failWithCodeNoParameterAddedToErrorCode( "request.is.not.in.submitted.and.pending.state", "Loan reschedule request rejection is not allowed. " + "Loan reschedule request is not in submitted and pending approval state."); } if (!dataValidationErrors.isEmpty()) { throw new PlatformApiDataValidationException(dataValidationErrors); } } }