/**
    * Copyright 2005-2012 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.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.krad.datadictionary.validation.constraint;
  
  import org.kuali.rice.core.api.config.property.ConfigurationService;
  import org.kuali.rice.krad.datadictionary.parse.BeanTag;
  import org.kuali.rice.krad.datadictionary.parse.BeanTagAttribute;
  import org.kuali.rice.krad.service.KRADServiceLocator;
  import org.kuali.rice.krad.uif.UifConstants;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * TODO Administrator don't forget to fill this in.
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  @BeanTag(name = "integerPatternConstraint")
  public class IntegerPatternConstraint extends ValidDataPatternConstraint {
      protected boolean allowNegative;
      protected boolean onlyNegative;
      protected boolean omitZero;
  
      /**
       * @see org.kuali.rice.krad.datadictionary.validation.constraint.ValidCharactersPatternConstraint#getRegexString()
       */
      @Override
      protected String getRegexString() {
          StringBuffer regex = new StringBuffer();
  
          if (isAllowNegative() && !onlyNegative) {
              regex.append("((-?");
          } else if (onlyNegative) {
              regex.append("((-");
          } else {
              regex.append("((");
          }
          if (omitZero) {
              regex.append("[1-9][0-9]*))");
          } else {
              regex.append("[1-9][0-9]*)|[0]*)");
          }
  
          return regex.toString();
      }
  
      /**
       * @return the allowNegative
       */
      @BeanTagAttribute(name = "allowNegative")
      public boolean isAllowNegative() {
          return this.allowNegative;
      }
  
      /**
       * @param allowNegative the allowNegative to set
       */
      public void setAllowNegative(boolean allowNegative) {
          this.allowNegative = allowNegative;
      }
  
      @BeanTagAttribute(name = "onlyNegative")
      public boolean isOnlyNegative() {
          return onlyNegative;
      }
  
      /**
       * When set to true, only allows negative numbers (and zero if allowZero is still true)
       *
       * @param onlyNegative
       */
      public void setOnlyNegative(boolean onlyNegative) {
          this.onlyNegative = onlyNegative;
      }
  
      @BeanTagAttribute(name = "omitZero")
      public boolean isOmitZero() {
          return omitZero;
      }
  
      /**
       * When set to true, zero is not allowed in the set of allowed numbers.
       *
       * @param omitZero
       */
     public void setOmitZero(boolean omitZero) {
         this.omitZero = omitZero;
     }
 
     /**
      * This overridden method ...
      *
      * @see org.kuali.rice.krad.datadictionary.validation.constraint.ValidDataPatternConstraint#getValidationMessageParams()
      */
     @Override
     public List<String> getValidationMessageParams() {
         if (validationMessageParams == null) {
             validationMessageParams = new ArrayList<String>();
             ConfigurationService configService = KRADServiceLocator.getKualiConfigurationService();
             if (allowNegative && !onlyNegative) {
                 if (omitZero) {
                     validationMessageParams.add(configService.getPropertyValueAsString(
                             UifConstants.Messages.VALIDATION_MSG_KEY_PREFIX + "positiveOrNegative"));
                 } else {
                     validationMessageParams.add(configService.getPropertyValueAsString(
                             UifConstants.Messages.VALIDATION_MSG_KEY_PREFIX + "positiveOrNegativeOrZero"));
                 }
             } else if (onlyNegative) {
                 if (omitZero) {
                     validationMessageParams.add(configService.getPropertyValueAsString(
                             UifConstants.Messages.VALIDATION_MSG_KEY_PREFIX + "negative"));
                 } else {
                     validationMessageParams.add(configService.getPropertyValueAsString(
                             UifConstants.Messages.VALIDATION_MSG_KEY_PREFIX + "negativeOrZero"));
                 }
             } else {
                 if (omitZero) {
                     validationMessageParams.add(configService.getPropertyValueAsString(
                             UifConstants.Messages.VALIDATION_MSG_KEY_PREFIX + "positive"));
                 } else {
                     validationMessageParams.add(configService.getPropertyValueAsString(
                             UifConstants.Messages.VALIDATION_MSG_KEY_PREFIX + "positiveOrZero"));
                 }
             }
         }
         return validationMessageParams;
     }
 }