com.gst.portfolio.self.loanaccount.data.SelfLoansDataValidator.java Source code

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Here is the source code for com.gst.portfolio.self.loanaccount.data.SelfLoansDataValidator.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.portfolio.self.loanaccount.data;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import javax.ws.rs.core.UriInfo;

import org.apache.commons.lang.StringUtils;
import com.gst.infrastructure.core.api.ApiParameterHelper;
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.exception.UnsupportedParameterException;
import com.gst.infrastructure.core.serialization.FromJsonHelper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.google.gson.JsonElement;

@Component
public class SelfLoansDataValidator {
    private static final Set<String> allowedAssociationParameters = new HashSet<>(
            Arrays.asList("repaymentSchedule", "futureSchedule", "originalSchedule", "transactions", "charges",
                    "guarantors", "collateral", "linkedAccount", "multiDisburseDetails"));
    private final FromJsonHelper fromApiJsonHelper;

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

    public void validateRetrieveLoan(final UriInfo uriInfo) {
        List<String> unsupportedParams = new ArrayList<>();

        Set<String> associationParameters = ApiParameterHelper
                .extractAssociationsForResponseIfProvided(uriInfo.getQueryParameters());
        if (!associationParameters.isEmpty()) {
            associationParameters.removeAll(allowedAssociationParameters);
            if (!associationParameters.isEmpty()) {
                unsupportedParams.addAll(associationParameters);
            }
        }

        if (uriInfo.getQueryParameters().getFirst("exclude") != null) {
            unsupportedParams.add("exclude");
        }

        throwExceptionIfReqd(unsupportedParams);
    }

    public void validateRetrieveTransaction(UriInfo uriInfo) {
        List<String> unsupportedParams = new ArrayList<>();

        validateTemplate(uriInfo, unsupportedParams);

        throwExceptionIfReqd(unsupportedParams);

    }

    public HashMap<String, Object> validateLoanApplication(final String json) {
        if (StringUtils.isBlank(json)) {
            throw new InvalidJsonException();
        }

        final List<ApiParameterError> dataValidationErrors = new ArrayList<>();
        final DataValidatorBuilder baseDataValidator = new DataValidatorBuilder(dataValidationErrors)
                .resource("loan");

        final JsonElement element = this.fromApiJsonHelper.parse(json);

        final String loanTypeParameterName = "loanType";
        final String loanTypeStr = this.fromApiJsonHelper.extractStringNamed(loanTypeParameterName, element);
        baseDataValidator.reset().parameter(loanTypeParameterName).value(loanTypeStr).notNull()
                .equals("individual");

        final String clientIdParameterName = "clientId";
        final String clientId = this.fromApiJsonHelper.extractStringNamed(clientIdParameterName, element);
        baseDataValidator.reset().parameter(clientIdParameterName).value(clientId).notNull().longGreaterThanZero();

        if (!dataValidationErrors.isEmpty()) {
            throw new PlatformApiDataValidationException(dataValidationErrors);
        }

        HashMap<String, Object> retAttr = new HashMap<>();
        retAttr.put("clientId", Long.parseLong(clientId));

        return retAttr;

    }

    public HashMap<String, Object> validateModifyLoanApplication(final String json) {
        final List<ApiParameterError> dataValidationErrors = new ArrayList<>();
        final DataValidatorBuilder baseDataValidator = new DataValidatorBuilder(dataValidationErrors)
                .resource("loan");

        final JsonElement element = this.fromApiJsonHelper.parse(json);

        final String loanTypeParameterName = "loanType";
        if (this.fromApiJsonHelper.parameterExists(loanTypeParameterName, element)) {
            final String loanTypeStr = this.fromApiJsonHelper.extractStringNamed(loanTypeParameterName, element);
            baseDataValidator.reset().parameter(loanTypeParameterName).value(loanTypeStr).notNull()
                    .equals("individual");
        }

        final String clientIdParameterName = "clientId";
        String clientId = null;
        if (this.fromApiJsonHelper.parameterExists(clientIdParameterName, element)) {
            clientId = this.fromApiJsonHelper.extractStringNamed(clientIdParameterName, element);
            baseDataValidator.reset().parameter(clientIdParameterName).value(clientId).notNull()
                    .longGreaterThanZero();
        }

        if (!dataValidationErrors.isEmpty()) {
            throw new PlatformApiDataValidationException(dataValidationErrors);
        }

        HashMap<String, Object> retAttr = new HashMap<>();
        if (clientId != null) {
            retAttr.put("clientId", Long.parseLong(clientId));
        }

        return retAttr;
    }

    private void throwExceptionIfReqd(List<String> unsupportedParams) {
        if (unsupportedParams.size() > 0) {
            throw new UnsupportedParameterException(unsupportedParams);
        }
    }

    private void validateTemplate(final UriInfo uriInfo, List<String> unsupportedParams) {
        final boolean templateRequest = ApiParameterHelper.template(uriInfo.getQueryParameters());
        if (templateRequest) {
            unsupportedParams.add("template");
        }
    }

}