Java tutorial
/** * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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 com.gst.accounting.journalentry.serialization; import java.lang.reflect.Type; import java.math.BigDecimal; import java.util.HashSet; import java.util.Locale; import java.util.Map; import java.util.Set; import org.apache.commons.lang.StringUtils; import com.gst.accounting.journalentry.api.JournalEntryJsonInputParams; import com.gst.accounting.journalentry.command.JournalEntryCommand; import com.gst.accounting.journalentry.command.SingleDebitOrCreditEntryCommand; import com.gst.infrastructure.core.exception.InvalidJsonException; import com.gst.infrastructure.core.serialization.AbstractFromApiJsonDeserializer; import com.gst.infrastructure.core.serialization.FromApiJsonDeserializer; import com.gst.infrastructure.core.serialization.FromJsonHelper; import org.joda.time.LocalDate; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import com.google.gson.JsonArray; import com.google.gson.JsonElement; import com.google.gson.JsonObject; import com.google.gson.reflect.TypeToken; /** * Implementation of {@link FromApiJsonDeserializer} for * {@link JournalEntryCommand}'s. */ @Component public final class JournalEntryCommandFromApiJsonDeserializer extends AbstractFromApiJsonDeserializer<JournalEntryCommand> { private final FromJsonHelper fromApiJsonHelper; @Autowired public JournalEntryCommandFromApiJsonDeserializer(final FromJsonHelper fromApiJsonfromApiJsonHelper) { this.fromApiJsonHelper = fromApiJsonfromApiJsonHelper; } @Override public JournalEntryCommand commandFromApiJson(final String json) { if (StringUtils.isBlank(json)) { throw new InvalidJsonException(); } final Type typeOfMap = new TypeToken<Map<String, Object>>() { }.getType(); final Set<String> supportedParameters = JournalEntryJsonInputParams.getAllValues(); this.fromApiJsonHelper.checkForUnsupportedParameters(typeOfMap, json, supportedParameters); final JsonElement element = this.fromApiJsonHelper.parse(json); final Long officeId = this.fromApiJsonHelper .extractLongNamed(JournalEntryJsonInputParams.OFFICE_ID.getValue(), element); final String currencyCode = this.fromApiJsonHelper .extractStringNamed(JournalEntryJsonInputParams.CURRENCY_CODE.getValue(), element); final String comments = this.fromApiJsonHelper .extractStringNamed(JournalEntryJsonInputParams.COMMENTS.getValue(), element); final LocalDate transactionDate = this.fromApiJsonHelper .extractLocalDateNamed(JournalEntryJsonInputParams.TRANSACTION_DATE.getValue(), element); final String referenceNumber = this.fromApiJsonHelper .extractStringNamed(JournalEntryJsonInputParams.REFERENCE_NUMBER.getValue(), element); final Long accountingRuleId = this.fromApiJsonHelper .extractLongNamed(JournalEntryJsonInputParams.ACCOUNTING_RULE.getValue(), element); final JsonObject topLevelJsonElement = element.getAsJsonObject(); final Locale locale = this.fromApiJsonHelper.extractLocaleParameter(topLevelJsonElement); final BigDecimal amount = this.fromApiJsonHelper .extractBigDecimalNamed(JournalEntryJsonInputParams.AMOUNT.getValue(), element, locale); final Long paymentTypeId = this.fromApiJsonHelper .extractLongNamed(JournalEntryJsonInputParams.PAYMENT_TYPE_ID.getValue(), element); final String accountNumber = this.fromApiJsonHelper .extractStringNamed(JournalEntryJsonInputParams.ACCOUNT_NUMBER.getValue(), element); final String checkNumber = this.fromApiJsonHelper .extractStringNamed(JournalEntryJsonInputParams.CHECK_NUMBER.getValue(), element); final String receiptNumber = this.fromApiJsonHelper .extractStringNamed(JournalEntryJsonInputParams.RECEIPT_NUMBER.getValue(), element); final String bankNumber = this.fromApiJsonHelper .extractStringNamed(JournalEntryJsonInputParams.BANK_NUMBER.getValue(), element); final String routingCode = this.fromApiJsonHelper .extractStringNamed(JournalEntryJsonInputParams.ROUTING_CODE.getValue(), element); SingleDebitOrCreditEntryCommand[] credits = null; SingleDebitOrCreditEntryCommand[] debits = null; if (element.isJsonObject()) { if (topLevelJsonElement.has(JournalEntryJsonInputParams.CREDITS.getValue()) && topLevelJsonElement.get(JournalEntryJsonInputParams.CREDITS.getValue()).isJsonArray()) { credits = populateCreditsOrDebitsArray(topLevelJsonElement, locale, credits, JournalEntryJsonInputParams.CREDITS.getValue()); } if (topLevelJsonElement.has(JournalEntryJsonInputParams.DEBITS.getValue()) && topLevelJsonElement.get(JournalEntryJsonInputParams.DEBITS.getValue()).isJsonArray()) { debits = populateCreditsOrDebitsArray(topLevelJsonElement, locale, debits, JournalEntryJsonInputParams.DEBITS.getValue()); } } return new JournalEntryCommand(officeId, currencyCode, transactionDate, comments, credits, debits, referenceNumber, accountingRuleId, amount, paymentTypeId, accountNumber, checkNumber, receiptNumber, bankNumber, routingCode); } /** * @param comments * @param topLevelJsonElement * @param locale */ private SingleDebitOrCreditEntryCommand[] populateCreditsOrDebitsArray(final JsonObject topLevelJsonElement, final Locale locale, SingleDebitOrCreditEntryCommand[] debitOrCredits, final String paramName) { final JsonArray array = topLevelJsonElement.get(paramName).getAsJsonArray(); debitOrCredits = new SingleDebitOrCreditEntryCommand[array.size()]; for (int i = 0; i < array.size(); i++) { final JsonObject creditElement = array.get(i).getAsJsonObject(); final Set<String> parametersPassedInForCreditsCommand = new HashSet<>(); final Long glAccountId = this.fromApiJsonHelper.extractLongNamed("glAccountId", creditElement); final String comments = this.fromApiJsonHelper.extractStringNamed("comments", creditElement); final BigDecimal amount = this.fromApiJsonHelper.extractBigDecimalNamed("amount", creditElement, locale); debitOrCredits[i] = new SingleDebitOrCreditEntryCommand(parametersPassedInForCreditsCommand, glAccountId, amount, comments); } return debitOrCredits; } }