/*

  * Copyright 2011 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 1.0 (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.opensource.org/licenses/ecl1.php

  *

  * 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 org.kuali.rice.kns.uif.util;

 import java.text.MessageFormat;

 import java.util.ArrayList;

 import java.util.EnumSet;

 import java.util.List;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.core.api.config.property.ConfigurationService;

 import org.kuali.rice.kns.datadictionary.validation.constraint.BaseConstraint;

 import org.kuali.rice.kns.datadictionary.validation.constraint.CaseConstraint;

 import org.kuali.rice.kns.datadictionary.validation.constraint.Constraint;

 import org.kuali.rice.kns.datadictionary.validation.constraint.MustOccurConstraint;

 import org.kuali.rice.kns.datadictionary.validation.constraint.PrerequisiteConstraint;

 import org.kuali.rice.kns.datadictionary.validation.constraint.SimpleConstraint;

 import org.kuali.rice.kns.datadictionary.validation.constraint.ValidCharactersConstraint;

 import org.kuali.rice.kns.datadictionary.validation.constraint.WhenConstraint;

 import org.kuali.rice.kns.service.KNSServiceLocator;

 import org.kuali.rice.kns.uif.UifConstants.ViewStatus;

 import org.kuali.rice.kns.uif.container.PageGroup;

 import org.kuali.rice.kns.uif.container.View;

 import org.kuali.rice.kns.uif.control.TextControl;

 import org.kuali.rice.kns.uif.field.AttributeField;

 /**

  * This class contains all the methods necessary for generating the js required to perform validation client side.

  * The processAndApplyConstraints(AttributeField field, View view) is the key method of this class used by

  * AttributeField to setup its client side validation mechanisms.

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class ClientValidationUtils {

         // used to give validation methods unique signatures

         private static int methodKey = 0;

         // list used to temporarily store mustOccurs field names for the error

         // message

         private static List<List<String>> mustOccursPathNames;

         public static final String LABEL_KEY_SPLIT_PATTERN = ",";

         public static final String VALIDATION_MSG_KEY_PREFIX = "validation.";

         public static final String PREREQ_MSG_KEY = "prerequisite";

         public static final String POSTREQ_MSG_KEY = "postrequisite";

         public static final String MUSTOCCURS_MSG_KEY = "mustOccurs";

         public static final String GENERIC_FIELD_MSG_KEY = "general.genericFieldName";

         public static final String ALL_MSG_KEY = "general.all";

         public static final String ATMOST_MSG_KEY = "general.atMost";

         public static final String AND_MSG_KEY = "general.and";

         public static final String OR_MSG_KEY = "general.or";

         private static ConfigurationService configService = KNSServiceLocator.getKualiConfigurationService();

         //Enum representing names of rules provided by the jQuery plugin

         public static enum ValidationMessageKeys{

                 REQUIRED("required"), 

                 MIN_EXCLUSIVE("minExclusive"), 

                 MAX_INCLUSIVE("maxInclusive"),

                 MIN_LENGTH("minLengthConditional"),

                 MAX_LENGTH("maxLengthConditional"),

                 EMAIL("email"),

                 URL("url"),

                 DATE("date"),

                 NUMBER("number"),

                 DIGITS("digits"),

                 CREDITCARD("creditcard"),

                 LETTERS_WITH_BASIC_PUNC("letterswithbasicpunc"),

                 ALPHANUMERIC("alphanumeric"),

                 LETTERS_ONLY("lettersonly"),

                 NO_WHITESPACE("nowhitespace"),

                 INTEGER("integer"),

                 PHONE_US("phoneUS"),

                 TIME("time");

                 private ValidationMessageKeys(String name) {

                         this.name = name;

                 }

                 private final String name;

                 @Override

                 public String toString() {

                         return name;

                 }

                 public static boolean contains(String name){

             for (ValidationMessageKeys element : EnumSet.allOf(ValidationMessageKeys.class)) {

                 if (element.toString().equalsIgnoreCase(name)) {

                     return true;

                 }

             }

             return false;

                 }

         }

         public static String generateMessageFromLabelKey(String labelKey){

                 String message = "NO MESSAGE";

                 if(StringUtils.isNotEmpty(labelKey)){

                         if(labelKey.contains(LABEL_KEY_SPLIT_PATTERN)){

                                 message = "";

                                 String[] tokens = labelKey.split(LABEL_KEY_SPLIT_PATTERN);

                                 int i = 0;

                                 for(String s: tokens){

                                         String ps = configService.getPropertyString(VALIDATION_MSG_KEY_PREFIX + s);

                                         i++;

                                         if(i != tokens.length){

                                                 message = message + ps + ", ";

                                         }

                                         else{

                                                 message = message + ps;

                                         }

                                 }

                         }

                         else{

                                 message = configService.getPropertyString(VALIDATION_MSG_KEY_PREFIX + labelKey);

                         }

                 }

                 return message;

         }

         /**

          * Generates the js object used to override all default messages for validator jquery plugin with custom

          * messages derived from the configService.

          * 

          * @return

          */

         public static String generateValidatorMessagesOption(){

                 String mOption = "";

                 String keyValuePairs = "";

                 for(ValidationMessageKeys element : EnumSet.allOf(ValidationMessageKeys.class)){

                         String key = element.toString();

                         String message = configService.getPropertyString(VALIDATION_MSG_KEY_PREFIX + key);

                         if(StringUtils.isNotEmpty(message)){

                                 keyValuePairs = keyValuePairs + "\n" + key + ": '"+ message + "',";

                         }

                 }

                 keyValuePairs = StringUtils.removeEnd(keyValuePairs, ",");

                 if(StringUtils.isNotEmpty(keyValuePairs)){

                         mOption="{" + keyValuePairs + "}";

                 }

                 return mOption;

         }

         /**

          * Returns the add method jquery validator call for the regular expression

          * stored in validCharactersConstraint.

          * 

          * @param validCharactersConstraint

          * @return js validator.addMethod script

          */

         public static String getRegexMethod(AttributeField field, ValidCharactersConstraint validCharactersConstraint) {

                 String message = generateMessageFromLabelKey(validCharactersConstraint.getLabelKey());

                 String key = "validChar-" + field.getBindingInfo().getBindingPath() + methodKey;

                 return "\njQuery.validator.addMethod(\"" + key

                                 + "\", function(value, element) {\n" + " return this.optional(element) || "

                                 + "/" + validCharactersConstraint.getValue() + "/.test(value); " + "}, \""

                                 + message + "\");";

         }

         /**

          * This method processes a single CaseConstraint. Internally it makes calls

          * to processWhenConstraint for each WhenConstraint that exists in this

          * constraint. It adds a "dependsOn" css class to this field for the field

          * which the CaseConstraint references.

          * 

          * @param view

          * @param andedCase

          *            the boolean logic to be anded when determining if this case is

          *            satisfied (used for nested CaseConstraints)

          */

         public static void processCaseConstraint(AttributeField field, View view, CaseConstraint constraint, String andedCase) {

                 if (constraint.getOperator() == null) {

                         constraint.setOperator("equals");

                 }

                 String operator = "==";

                 if (constraint.getOperator().equalsIgnoreCase("not_equals")) {

                         operator = "!=";

                 }

                 else if (constraint.getOperator().equalsIgnoreCase("greater_than_equal")) {

                         operator = ">=";

                 }

                 else if (constraint.getOperator().equalsIgnoreCase("less_than_equal")) {

                         operator = "<=";

                 }

                 else if (constraint.getOperator().equalsIgnoreCase("greater_than")) {

                         operator = ">";

                 }

                 else if (constraint.getOperator().equalsIgnoreCase("less_than")) {

                         operator = "<";

                 }

                 else if (constraint.getOperator().equalsIgnoreCase("has_value")) {

                         operator = "";

                 }

                 // add more operator types here if more are supported later

                 field.getControl().addStyleClass("dependsOn-" + constraint.getFieldPath());

                 if (constraint.getWhenConstraint() != null && !constraint.getWhenConstraint().isEmpty()) {

                         for (WhenConstraint wc : constraint.getWhenConstraint()) {

                                 processWhenConstraint(field, view, constraint, wc, constraint.getFieldPath(), operator, andedCase);

                         }

                 }

         }

         /**

          * This method processes the WhenConstraint passed in. The when constraint

          * is used to create a boolean statement to determine if the constraint will

          * be applied. The necessary rules/methods for applying this constraint are

          * created in the createRule call. Note the use of the use of coerceValue js

          * function call.

          * 

          * @param view

          * @param wc

          * @param fieldPath

          * @param operator

          * @param andedCase

          */

         private static void processWhenConstraint(AttributeField field, View view, CaseConstraint caseConstraint, WhenConstraint wc, String fieldPath,

                         String operator, String andedCase) {

                 String ruleString = "";

                 // prerequisite constraint

                 String booleanStatement = "";

                 if (wc.getValues() != null) {

                         String caseStr = "";

                         if (!caseConstraint.isCaseSensitive()) {

                                 caseStr = ".toUpperCase()";

                         }

                         for (int i = 0; i < wc.getValues().size(); i++) {

                                 if (operator.isEmpty()) {

                                         // has_value case

                                         if (wc.getValues().get(i) instanceof String

                                                         && ((String) wc.getValues().get(i)).equalsIgnoreCase("false")) {

                                                 booleanStatement = booleanStatement + "!(coerceValue('" + fieldPath + "'))";

                                         }

                                         else {

                                                 booleanStatement = booleanStatement + "(coerceValue('" + fieldPath + "'))";

                                         }

                                 }

                                 else {

                                         // everything else

                                         booleanStatement = booleanStatement + "(coerceValue('" + fieldPath + "')" + caseStr + " "

                                                         + operator + " \"" + wc.getValues().get(i) + "\"" + caseStr + ")";

                                 }

                                 if ((i + 1) != wc.getValues().size()) {

                                         booleanStatement = booleanStatement + " || ";

                                 }

                         }

                 }

                 if (andedCase != null) {

                         booleanStatement = "(" + booleanStatement + ") && (" + andedCase + ")";

                 }

                 if (wc.getConstraint() != null && StringUtils.isNotEmpty(booleanStatement)) {

                         ruleString = createRule(field, wc.getConstraint(), booleanStatement, view);

                 }

                 if (StringUtils.isNotEmpty(ruleString)) {

                         addScriptToPage(view, field, ruleString);

                 }

         }

         /**

          * Adds the script to the view to execute on a jQuery document ready event.

          * 

          * @param view

          * @param script

          */

         public static void addScriptToPage(View view, AttributeField field, String script) {

         String prefixScript = "";

         if (field.getOnDocumentReadyScript() != null) {

             prefixScript = field.getOnDocumentReadyScript();

         }

         field.setOnDocumentReadyScript(prefixScript + "\n" + "runValidationScript(function(){" + script + "});");

         }

         /**

          * Determines which fields are being evaluated in a boolean statement, so handlers can be

          * attached to them if needed, returns these names in a list.

          * 

          * @param statement

          * @return

          */

         private static List<String> parseOutFields(String statement){

             List<String> fieldNames = new ArrayList<String>();

             String[] splits = StringUtils.splitByWholeSeparator(statement, "coerceValue('");

             for(String s: splits){

                 String fieldName = StringUtils.substringBefore(s, "'");

                 fieldNames.add(fieldName);

             }

             return fieldNames;

         }

         /**

          * This method takes in a constraint to apply only when the passed in

          * booleanStatement is valid. The method will create the necessary addMethod

          * and addRule jquery validator calls for the rule to be applied to the

          * field when the statement passed in evaluates to true during runtime and

          * this field is being validated. Note the use of custom methods for min/max

          * length/value.

          * 

          * @param applyToField

          *            the field to apply the generated methods and rules to

          * @param constraint

          *            the constraint to be applied when the booleanStatement

          *            evaluates to true during validation

          * @param booleanStatement

          *            the booleanstatement in js - should return true when the

          *            validation rule should be applied

          * @param view

          * @return

          */

         @SuppressWarnings("boxing")

         private static String createRule(AttributeField field, Constraint constraint, String booleanStatement, View view) {

                 String rule = "";

                 int constraintCount = 0;

                 if (constraint instanceof BaseConstraint && ((BaseConstraint) constraint).getApplyClientSide()) {

                         if (constraint instanceof SimpleConstraint) {

                                 if (((SimpleConstraint) constraint).getRequired()) {

                                         rule = rule + "required: function(element){\nreturn (" + booleanStatement + ");}";

                                         //special requiredness indicator handling

                                         String showIndicatorScript = "";

                                         for(String checkedField: parseOutFields(booleanStatement)){

                                             showIndicatorScript = showIndicatorScript + 

                                                 "setupShowReqIndicatorCheck('"+ checkedField +"', '" + field.getBindingInfo().getBindingPath() + "', " + "function(){\nreturn (" + booleanStatement + ");});\n";

                                         }

                                         addScriptToPage(view, field, showIndicatorScript);

                                         constraintCount++;

                                 }

                                 if (((SimpleConstraint) constraint).getMinLength() != null) {

                                         if (constraintCount > 0) {

                                                 rule = rule + ",\n";

                                         }

                                         rule = rule + "minLengthConditional: [" + ((SimpleConstraint) constraint).getMinLength()

                                                         + ", function(){return " + booleanStatement + ";}]";

                                 }

                                 if (((SimpleConstraint) constraint).getMaxLength() != null) {

                                         if (constraintCount > 0) {

                                                 rule = rule + ",\n";

                                         }

                                         rule = rule + "maxLengthConditional: [" + ((SimpleConstraint) constraint).getMaxLength()

                                                         + ", function(){return " + booleanStatement + ";}]";

                                 }

                                 if (((SimpleConstraint) constraint).getExclusiveMin() != null) {

                                         if (constraintCount > 0) {

                                                 rule = rule + ",\n";

                                         }

                                         rule = rule + "minExclusive: [" + ((SimpleConstraint) constraint).getExclusiveMin()

                                                         + ", function(){return " + booleanStatement + ";}]";

                                 }

                                 if (((SimpleConstraint) constraint).getInclusiveMax() != null) {

                                         if (constraintCount > 0) {

                                                 rule = rule + ",\n";

                                         }

                                         rule = rule + "maxInclusive: [" + ((SimpleConstraint) constraint).getInclusiveMax()

                                                         + ", function(){return " + booleanStatement + ";}]";

                                 }

                                 rule = "jq('[name=\"" + field.getBindingInfo().getBindingPath() + "\"]').rules(\"add\", {" + rule + "\n});";

                         }

                         else if (constraint instanceof ValidCharactersConstraint) {

                                 String regexMethod = "";

                                 String methodName = "";

                                 if(StringUtils.isNotEmpty(((ValidCharactersConstraint)constraint).getValue())) {

                                         regexMethod = ClientValidationUtils.getRegexMethod(field, (ValidCharactersConstraint) constraint) + "\n";

                                         methodName = "validChar-" + field.getBindingInfo().getBindingPath() + methodKey;

                                         methodKey++;

                                 }

                                 else {

                                         if(StringUtils.isNotEmpty(((ValidCharactersConstraint)constraint).getLabelKey())){

                                                 methodName = ((ValidCharactersConstraint)constraint).getLabelKey();

                                         }

                                 }

                                 if (StringUtils.isNotEmpty(methodName)) {

                                         rule = regexMethod + "jq('[name=\"" + field.getBindingInfo().getBindingPath() + "\"]').rules(\"add\", {\n\"" + methodName

                                                         + "\" : function(element){return (" + booleanStatement + ");}\n});";

                                 }

                         }

                         else if (constraint instanceof PrerequisiteConstraint) {

                                 processPrerequisiteConstraint(field, (PrerequisiteConstraint) constraint, view, booleanStatement);

                         }

                         else if (constraint instanceof CaseConstraint) {

                                 processCaseConstraint(field, view, (CaseConstraint) constraint, booleanStatement);

                         }

                         else if (constraint instanceof MustOccurConstraint) {

                                 processMustOccurConstraint(field, view, (MustOccurConstraint) constraint, booleanStatement);

                         }

                 }

                 return rule;

         }

         /**

          * This method is a simpler version of processPrerequisiteConstraint

          * 

          * @see AttributeField#processPrerequisiteConstraint(PrerequisiteConstraint,

          *      View, String)

          * @param constraint

          * @param view

          */

         public static void processPrerequisiteConstraint(AttributeField field, PrerequisiteConstraint constraint, View view) {

                 processPrerequisiteConstraint(field, constraint, view, "true");

         }

         /**

          * This method processes a Prerequisite constraint that should be applied

          * when the booleanStatement passed in evaluates to true.

          * 

          * @param constraint

          *            prerequisiteConstraint

          * @param view

          * @param booleanStatement

          *            the booleanstatement in js - should return true when the

          *            validation rule should be applied

          */

         public static void processPrerequisiteConstraint(AttributeField field, PrerequisiteConstraint constraint, View view, String booleanStatement) {

                 if (constraint != null && constraint.getApplyClientSide().booleanValue()) {

                         addScriptToPage(view, field, getPrerequisiteStatement(field, view, constraint, booleanStatement)

                                         + getPostrequisiteStatement(field, constraint, booleanStatement));

                 //special requiredness indicator handling

                 String showIndicatorScript = "setupShowReqIndicatorCheck('"+ field.getBindingInfo().getBindingPath() +"', '" + constraint.getAttributePath() + "', " + "function(){\nreturn (coerceValue('" + field.getBindingInfo().getBindingPath() + "') && " + booleanStatement + ");});\n";

                 addScriptToPage(view, field, showIndicatorScript);

                 }

         }

         /**

          * This method creates the script necessary for executing a prerequisite

          * rule in which this field occurs after the field specified in the

          * prerequisite rule - since it requires a specific set of UI logic. Builds

          * an if statement containing an addMethod jquery validator call. Adds a

          * "dependsOn" css class to this field for the field specified.

          * 

          * @param constraint

          *            prerequisiteConstraint

          * @param booleanStatement

          *            the booleanstatement in js - should return true when the

          *            validation rule should be applied

          * @return

          */

         private static String getPrerequisiteStatement(AttributeField field, View view, PrerequisiteConstraint constraint, String booleanStatement) {

                 methodKey++;

                 String message = "";

                 if(StringUtils.isEmpty(constraint.getLabelKey())){

                         message = configService.getPropertyString(VALIDATION_MSG_KEY_PREFIX + "prerequisite");

                 }

                 else{

                         message = generateMessageFromLabelKey(constraint.getLabelKey());

                 }

                 if(StringUtils.isEmpty(message)){

                         message = "prerequisite - No message";

                 }

                 else{

                         AttributeField requiredField = view.getViewIndex().getAttributeFieldByPath(constraint.getAttributePath());

                         if(requiredField != null && StringUtils.isNotEmpty(requiredField.getLabel())){

                                 message = MessageFormat.format(message, requiredField.getLabel());

                         }

                         else{

                                 message = MessageFormat.format(message, configService.getPropertyString(GENERIC_FIELD_MSG_KEY));

                         }

                 }

                 // field occurs before case

                 String dependsClass = "dependsOn-" + constraint.getAttributePath();

                 String methodName = "prConstraint-" + field.getBindingInfo().getBindingPath()+ methodKey;

                 String addClass = "jq('[name=\""+ field.getBindingInfo().getBindingPath() + "\"]').addClass('" + dependsClass + "');\n" +

                         "jq('[name=\""+ field.getBindingInfo().getBindingPath() + "\"]').addClass('" + methodName + "');\n";

                 String method = "\njQuery.validator.addMethod(\""+ methodName +"\", function(value, element) {\n" +

                         " if(" + booleanStatement + "){ return (this.optional(element) || (coerceValue('" + constraint.getAttributePath() + "')));}else{return true;} " +

                         "}, \"" + message + "\");";

                 String ifStatement = "if(occursBefore('" + constraint.getAttributePath() + "','" + field.getBindingInfo().getBindingPath() + 

                 "')){" + addClass + method + "}";

                 return ifStatement;

         }

         /**

          * This method creates the script necessary for executing a prerequisite

          * rule in which this field occurs before the field specified in the

          * prerequisite rule - since it requires a specific set of UI logic. Builds

          * an if statement containing an addMethod jquery validator call.

          * 

          * @param constraint

          *            prerequisiteConstraint

          * @param booleanStatement

          *            the booleanstatement in js - should return true when the

          *            validation rule should be applied

          * @return

          */

         private static String getPostrequisiteStatement(AttributeField field, PrerequisiteConstraint constraint, String booleanStatement) {

                 // field occurs after case

                 String message = "";

                 if(StringUtils.isEmpty(constraint.getLabelKey())){

                         message = configService.getPropertyString(VALIDATION_MSG_KEY_PREFIX + "postrequisite");

                 }

                 else{

                         message = generateMessageFromLabelKey(constraint.getLabelKey());

                 }

                 if(StringUtils.isEmpty(constraint.getLabelKey())){

                         if(StringUtils.isNotEmpty(field.getLabel())){

                                 message = MessageFormat.format(message, field.getLabel());

                         }

                         else{

                                 message = MessageFormat.format(message, configService.getPropertyString(GENERIC_FIELD_MSG_KEY));

                         }

                 }

                 String function = "function(element){\n" +

                         "return (coerceValue('"+ field.getBindingInfo().getBindingPath() + "') && " + booleanStatement + ");}";

                 String postStatement = "\nelse if(occursBefore('" + field.getBindingInfo().getBindingPath() + "','" + constraint.getAttributePath() + 

                         "')){\njq('[name=\""+ constraint.getAttributePath() + 

                         "\"]').rules(\"add\", { required: \n" + function 

                         + ", \nmessages: {\nrequired: \""+ message +"\"}});}\n";

                 return postStatement;

         }

         /**

          * This method processes the MustOccurConstraint. The constraint is only

          * applied when the booleanStatement evaluates to true during validation.

          * This method creates the addMethod and add rule calls for the jquery

          * validation plugin necessary for applying this constraint to this field.

          * 

          * @param view

          * @param mc

          * @param booleanStatement

          *            the booleanstatement in js - should return true when the

          *            validation rule should be applied

          */

         public static void processMustOccurConstraint(AttributeField field, View view, MustOccurConstraint mc, String booleanStatement) {

                 methodKey++;

                 mustOccursPathNames = new ArrayList<List<String>>();

                 // TODO make this show the fields its requiring

                 String methodName = "moConstraint-" + field.getBindingInfo().getBindingPath() + methodKey;

                 String method = "\njQuery.validator.addMethod(\""+ methodName +"\", function(value, element) {\n" +

                 " if(" + booleanStatement + "){return (this.optional(element) || ("+ getMustOccurStatement(field, mc) + "));}else{return true;}" +

                 "}, \"" + getMustOccursMessage(view, mc) +"\");";

                 String rule = method + "jq('[name=\""+ field.getBindingInfo().getBindingPath() + "\"]').rules(\"add\", {\n\"" + methodName + "\": function(element){return (" + booleanStatement + ");}\n});";

                 addScriptToPage(view, field, rule);

         }

         /**

          * This method takes in a MustOccurConstraint and returns the statement used

          * in determining if the must occurs constraint has been satisfied when this

          * field is validated. Note the use of the mustOccurCheck method. Nested

          * mustOccurConstraints are ored against the result of the mustOccurCheck by

          * calling this method recursively.

          * 

          * @param constraint

          * @return

          */

         @SuppressWarnings("boxing")

         private static String getMustOccurStatement(AttributeField field, MustOccurConstraint constraint) {

                 String statement = "";

                 List<String> attributePaths = new ArrayList<String>();

                 if (constraint != null && constraint.getApplyClientSide()) {

                         String array = "[";

                         if (constraint.getPrerequisiteConstraints() != null) {

                                 for (int i = 0; i < constraint.getPrerequisiteConstraints().size(); i++) {

                                         field.getControl().addStyleClass("dependsOn-"

                                                         + constraint.getPrerequisiteConstraints().get(i).getAttributePath());

                                         array = array + "'" + constraint.getPrerequisiteConstraints().get(i).getAttributePath() + "'";

                                         attributePaths.add(constraint.getPrerequisiteConstraints().get(i).getAttributePath());

                                         if (i + 1 != constraint.getPrerequisiteConstraints().size()) {

                                                 array = array + ",";

                                         }

                                 }

                         }

                         array = array + "]";

                         statement = "mustOccurTotal(" + array + ", " + constraint.getMin() + ", " + constraint.getMax() + ")";

                         //add min to string list

                         if(constraint.getMin()!=null){

                                 attributePaths.add(constraint.getMin().toString());

                         }

                         else{

                                 attributePaths.add(null);

                         }

                         //add max to string list

                         if(constraint.getMax()!=null){

                                 attributePaths.add(constraint.getMax().toString());

                         }

                         else{

                                 attributePaths.add(null);

                         }

                         mustOccursPathNames.add(attributePaths);

                         if(StringUtils.isEmpty(statement)){

                                 statement = "0";

                         }

                         if (constraint.getMustOccurConstraints() != null) {

                                 for (MustOccurConstraint mc : constraint.getMustOccurConstraints()) {

                                         statement = "mustOccurCheck(" + statement + " + " + getMustOccurStatement(field, mc) +

                                                 ", " + constraint.getMin() + ", " + constraint.getMax() + ")";

                                 }

                         }

                         else{

                                 statement = "mustOccurCheck(" + statement +

                                 ", " + constraint.getMin() + ", " + constraint.getMax() + ")";

                         }

                 }

                 return statement;

         }

         /**

          * Generates a message for the must occur constraint (if no label key is specified).  

          * This message is most accurate when must occurs is a single

          * or double level constraint.  Beyond that, the message will still be accurate but may be confusing for

          * the user - this auto-generated message however will work in MOST use cases.

          * 

          * @param view

          * @return

          */

         private static String getMustOccursMessage(View view, MustOccurConstraint constraint){

                 String message = "";

                 if(StringUtils.isNotEmpty(constraint.getLabelKey())){

                         message = generateMessageFromLabelKey(constraint.getLabelKey());

                 }

                 else{

                         String and = configService.getPropertyString(AND_MSG_KEY);

                         String all = configService.getPropertyString(ALL_MSG_KEY);

                         String atMost = configService.getPropertyString(ATMOST_MSG_KEY);

                         String genericLabel = configService.getPropertyString(GENERIC_FIELD_MSG_KEY);

                         String mustOccursMsg = configService.getPropertyString(VALIDATION_MSG_KEY_PREFIX + MUSTOCCURS_MSG_KEY);

                         //String postfix = configService.getPropertyString(VALIDATION_MSG_KEY_PREFIX + MUSTOCCURS_POST_MSG_KEY);

                         String statement="";

                         for(int i=0; i< mustOccursPathNames.size(); i++){

                                 String andedString = "";

                                 List<String> paths = mustOccursPathNames.get(i);

                                 if(!paths.isEmpty()){

                                         //note that the last 2 strings are min and max and rest are attribute paths

                                         String min = paths.get(paths.size()-2);

                                         String max = paths.get(paths.size()-1);

                                         for(int j=0; j<paths.size()-2;j++){

                                                 AttributeField field = view.getViewIndex().getAttributeFieldByPath(paths.get(j).trim());

                                                 String label = genericLabel;

                                                 if(field != null && StringUtils.isNotEmpty(field.getLabel())){

                                                         label = field.getLabel();

                                                 }

                                                 if(min.equals(max)){

                                                         if(j==0){

                                                                 andedString = label;

                                                         }

                                                         else if(j==paths.size()-3){

                                                                 andedString = andedString + " " + and + " " + label;

                                                         }

                                                         else{

                                                                 andedString = andedString + ", " + label;

                                                         }

                                                 }

                                                 else{

                                                         andedString = andedString + "<li>" + label + "</li>";

                                                 }

                                         }

                                         if(min.equals(max)){

                                                 andedString = "<li>" + andedString + "</li>";

                                         }

                                         andedString="<ul>" + andedString + "</ul>";

                                         if(StringUtils.isNotEmpty(min) && StringUtils.isNotEmpty(max) && !min.equals(max)){

                                                 andedString = MessageFormat.format(mustOccursMsg, min + "-" + max) + "<br/>" +andedString;

                                         }

                                         else if(StringUtils.isNotEmpty(min) && StringUtils.isNotEmpty(max) && min.equals(max) && i==0){

                                                 andedString = MessageFormat.format(mustOccursMsg, all) + "<br/>" +andedString;

                                         }

                                         else if(StringUtils.isNotEmpty(min) && StringUtils.isNotEmpty(max) && min.equals(max) && i!=0){

                                                 //leave andedString as is

                                         }

                                         else if(StringUtils.isNotEmpty(min)){

                                                 andedString = MessageFormat.format(mustOccursMsg, min) + "<br/>" +andedString;

                                         }

                                         else if(StringUtils.isNotEmpty(max)){

                                                 andedString = MessageFormat.format(mustOccursMsg, atMost + " " + max) + "<br/>" +andedString;

                                         }

                                 }

                                 if(StringUtils.isNotEmpty(andedString)){

                                         if(i==0){

                                                 statement = andedString;

                                         }

                                         else{

                                                 statement = statement + andedString;

                                         }

                                 }

                         }

                         if(StringUtils.isNotEmpty(statement)){

                                 message = statement;

                         }

                 }

                 return message;

         }

         /**

          * This method processes all the constraints on the AttributeField passed in and adds all the necessary

          * jQuery and js required (validator's rules, methods, and messages) to the View's onDocumentReady call.

          * The result is js that will validate all the constraints contained on an AttributeField during user interaction

          * with the field using the jQuery validation plugin and custom code.

          * 

          * @param attributeField

          */

         @SuppressWarnings("boxing")

         public static void processAndApplyConstraints(AttributeField field, View view) {

                 methodKey = 0;

                 if ((field.getRequired() != null) && (field.getRequired().booleanValue())) {

                         field.getControl().addStyleClass("required");

                 }

                 if (field.getExclusiveMin() != null) {

                         if (field.getControl() instanceof TextControl && ((TextControl) field.getControl()).getDatePicker() != null) {

                                 ((TextControl) field.getControl()).getDatePicker().getComponentOptions().put("minDate", field.getExclusiveMin());

                         }

                         else{

                                 String rule = "jq('[name=\""+ field.getBindingInfo().getBindingPath() + "\"]').rules(\"add\", {\n minExclusive: ["+ field.getExclusiveMin() + "]});";

                                 addScriptToPage(view, field, rule);

                         }

                 }

                 if (field.getInclusiveMax() != null) {

                         if (field.getControl() instanceof TextControl && ((TextControl) field.getControl()).getDatePicker() != null) {

                                 ((TextControl) field.getControl()).getDatePicker().getComponentOptions().put("maxDate", field.getInclusiveMax());

                         }

                         else{

                                 String rule = "jq('[name=\""+ field.getBindingInfo().getBindingPath() + "\"]').rules(\"add\", {\n maxInclusive: ["+ field.getInclusiveMax() + "]});";

                                 addScriptToPage(view, field, rule);

                         }

                 }

                 if (field.getValidCharactersConstraint() != null && field.getValidCharactersConstraint().getApplyClientSide()) {

                         if(StringUtils.isNotEmpty(field.getValidCharactersConstraint().getValue())) {

                                 // set regex value takes precedence

                                 addScriptToPage(view, field, ClientValidationUtils.getRegexMethod(field, field.getValidCharactersConstraint()));

                                 field.getControl().addStyleClass("validChar-" + field.getBindingInfo().getBindingPath()+ methodKey);

                                 methodKey++;

                         }

                         else {

                                 //blindly assume that if there is no regex value defined that there must be a method by this name

                                 if(StringUtils.isNotEmpty(field.getValidCharactersConstraint().getLabelKey())){

                                         field.getControl().addStyleClass(field.getValidCharactersConstraint().getLabelKey());

                                 }

                         }

                 }

                 if (field.getCaseConstraint() != null && field.getCaseConstraint().getApplyClientSide()) {

                         processCaseConstraint(field, view, field.getCaseConstraint(), null);

                 }

                 if (field.getDependencyConstraints() != null) {

                         for (PrerequisiteConstraint prc : field.getDependencyConstraints()) {

                                 processPrerequisiteConstraint(field, prc, view);

                         }

                 }

                 if (field.getMustOccurConstraints() != null) {

                         for (MustOccurConstraint mc : field.getMustOccurConstraints()) {

                                 processMustOccurConstraint(field, view, mc, "true");

                         }

                 }

         }

 }