com.gst.organisation.holiday.data.HolidayDataValidator.java Source code

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Here is the source code for com.gst.organisation.holiday.data.HolidayDataValidator.java

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/**
 * 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.organisation.holiday.data;

import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.commons.lang.StringUtils;
import com.gst.infrastructure.core.data.ApiParameterError;
import com.gst.infrastructure.core.data.DataValidatorBuilder;
import com.gst.infrastructure.core.exception.InvalidJsonException;
import com.gst.infrastructure.core.exception.PlatformApiDataValidationException;
import com.gst.infrastructure.core.serialization.FromJsonHelper;
import com.gst.organisation.holiday.api.HolidayApiConstants;
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;

@Component
public class HolidayDataValidator {

    private final FromJsonHelper fromApiJsonHelper;

    @Autowired
    public HolidayDataValidator(final FromJsonHelper fromApiJsonHelper) {
        this.fromApiJsonHelper = fromApiJsonHelper;
    }

    public void validateForCreate(final String json) {

        if (StringUtils.isBlank(json)) {
            throw new InvalidJsonException();
        }

        final Type typeOfMap = new TypeToken<Map<String, Object>>() {
        }.getType();
        this.fromApiJsonHelper.checkForUnsupportedParameters(typeOfMap, json,
                HolidayApiConstants.HOLIDAY_CREATE_OR_UPDATE_REQUEST_DATA_PARAMETERS);
        final JsonElement element = this.fromApiJsonHelper.parse(json);

        final List<ApiParameterError> dataValidationErrors = new ArrayList<>();

        final DataValidatorBuilder baseDataValidator = new DataValidatorBuilder(dataValidationErrors)
                .resource(HolidayApiConstants.HOLIDAY_RESOURCE_NAME);

        final String name = this.fromApiJsonHelper.extractStringNamed(HolidayApiConstants.nameParamName, element);
        baseDataValidator.reset().parameter(HolidayApiConstants.nameParamName).value(name).notNull()
                .notExceedingLengthOf(100);

        final LocalDate fromDate = this.fromApiJsonHelper
                .extractLocalDateNamed(HolidayApiConstants.fromDateParamName, element);
        baseDataValidator.reset().parameter(HolidayApiConstants.fromDateParamName).value(fromDate).notNull();

        final LocalDate toDate = this.fromApiJsonHelper.extractLocalDateNamed(HolidayApiConstants.toDateParamName,
                element);
        baseDataValidator.reset().parameter(HolidayApiConstants.toDateParamName).value(toDate).notNull();

        final LocalDate repaymentsRescheduledTo = this.fromApiJsonHelper
                .extractLocalDateNamed(HolidayApiConstants.repaymentsRescheduledToParamName, element);
        baseDataValidator.reset().parameter(HolidayApiConstants.repaymentsRescheduledToParamName)
                .value(repaymentsRescheduledTo).notNull();

        Set<Long> offices = null;
        final JsonObject topLevelJsonElement = element.getAsJsonObject();

        if (topLevelJsonElement.has(HolidayApiConstants.officesParamName)
                && topLevelJsonElement.get(HolidayApiConstants.officesParamName).isJsonArray()) {

            final JsonArray array = topLevelJsonElement.get(HolidayApiConstants.officesParamName).getAsJsonArray();
            if (array.size() > 0) {
                offices = new HashSet<>(array.size());
                for (int i = 0; i < array.size(); i++) {
                    final JsonObject officeElement = array.get(i).getAsJsonObject();
                    final Long officeId = this.fromApiJsonHelper
                            .extractLongNamed(HolidayApiConstants.officeIdParamName, officeElement);
                    baseDataValidator.reset().parameter(HolidayApiConstants.officesParamName).value(officeId)
                            .notNull();
                    offices.add(officeId);
                }
            }
        }
        baseDataValidator.reset().parameter(HolidayApiConstants.officesParamName).value(offices).notNull();
        throwExceptionIfValidationWarningsExist(dataValidationErrors);
    }

    public void validateForUpdate(final String json) {

        if (StringUtils.isBlank(json)) {
            throw new InvalidJsonException();
        }

        final Type typeOfMap = new TypeToken<Map<String, Object>>() {
        }.getType();
        this.fromApiJsonHelper.checkForUnsupportedParameters(typeOfMap, json,
                HolidayApiConstants.HOLIDAY_CREATE_OR_UPDATE_REQUEST_DATA_PARAMETERS);
        final JsonElement element = this.fromApiJsonHelper.parse(json);

        final List<ApiParameterError> dataValidationErrors = new ArrayList<>();

        final DataValidatorBuilder baseDataValidator = new DataValidatorBuilder(dataValidationErrors)
                .resource(HolidayApiConstants.HOLIDAY_RESOURCE_NAME);

        if (this.fromApiJsonHelper.parameterExists(HolidayApiConstants.nameParamName, element)) {
            final String name = this.fromApiJsonHelper.extractStringNamed(HolidayApiConstants.nameParamName,
                    element);
            baseDataValidator.reset().parameter(HolidayApiConstants.nameParamName).value(name).notNull()
                    .notExceedingLengthOf(100);
        }

        if (this.fromApiJsonHelper.parameterExists(HolidayApiConstants.fromDateParamName, element)) {
            final LocalDate fromDate = this.fromApiJsonHelper
                    .extractLocalDateNamed(HolidayApiConstants.fromDateParamName, element);
            baseDataValidator.reset().parameter(HolidayApiConstants.fromDateParamName).value(fromDate).notNull();
        }

        if (this.fromApiJsonHelper.parameterExists(HolidayApiConstants.toDateParamName, element)) {
            final LocalDate toDate = this.fromApiJsonHelper
                    .extractLocalDateNamed(HolidayApiConstants.toDateParamName, element);
            baseDataValidator.reset().parameter(HolidayApiConstants.toDateParamName).value(toDate).notNull();
        }

        if (this.fromApiJsonHelper.parameterExists(HolidayApiConstants.repaymentsRescheduledToParamName, element)) {
            final LocalDate repaymentsRescheduledTo = this.fromApiJsonHelper
                    .extractLocalDateNamed(HolidayApiConstants.repaymentsRescheduledToParamName, element);
            baseDataValidator.reset().parameter(HolidayApiConstants.repaymentsRescheduledToParamName)
                    .value(repaymentsRescheduledTo).notNull();
        }

        Set<Long> offices = null;
        final JsonObject topLevelJsonElement = element.getAsJsonObject();
        if (this.fromApiJsonHelper.parameterExists(HolidayApiConstants.officesParamName, element)) {
            if (topLevelJsonElement.has(HolidayApiConstants.officesParamName)
                    && topLevelJsonElement.get(HolidayApiConstants.officesParamName).isJsonArray()) {

                final JsonArray array = topLevelJsonElement.get(HolidayApiConstants.officesParamName)
                        .getAsJsonArray();
                if (array.size() > 0) {
                    offices = new HashSet<>(array.size());
                    for (int i = 0; i < array.size(); i++) {
                        final JsonObject officeElement = array.get(i).getAsJsonObject();
                        final Long officeId = this.fromApiJsonHelper
                                .extractLongNamed(HolidayApiConstants.officeIdParamName, officeElement);
                        baseDataValidator.reset().parameter(HolidayApiConstants.officesParamName).value(officeId)
                                .notNull();
                        offices.add(officeId);
                    }
                }
            }
            baseDataValidator.reset().parameter(HolidayApiConstants.officesParamName).value(offices).notNull();
            throwExceptionIfValidationWarningsExist(dataValidationErrors);
        }
    }

    private void throwExceptionIfValidationWarningsExist(final List<ApiParameterError> dataValidationErrors) {
        if (!dataValidationErrors.isEmpty()) {
            //
            throw new PlatformApiDataValidationException(dataValidationErrors);
        }
    }
}