/**
    * 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 java.util.ArrayList;
  import java.util.List;
  
  import org.kuali.rice.core.api.config.property.ConfigurationService;
  import org.kuali.rice.krad.service.KRADServiceLocator;
  import org.kuali.rice.krad.uif.UifConstants;
  
  /**
   * TODO delyea don't forget to fill this in.
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class FixedPointPatternConstraint extends ValidDataPatternConstraint {
  
      protected boolean allowNegative;
      protected int precision;
      protected int scale;
  
      /**
       * Overriding retrieval of
       * 
       * @see org.kuali.rice.krad.datadictionary.validation.constraint.ValidCharactersPatternConstraint#getRegexString()
       */
      @Override
      protected String getRegexString() {
          StringBuilder regex = new StringBuilder();
  
          if (isAllowNegative()) {
              regex.append("-?");
          }
          // final patter will be: -?([0-9]{0,p-s}\.[0-9]{1,s}|[0-9]{1,p-s}) where p = precision, s=scale
          regex.append("(");
          regex.append("[0-9]{0," + (getPrecision() - getScale()) + "}");
          regex.append("\\.");
          regex.append("[0-9]{1," + getScale() + "}");
          regex.append("|[0-9]{1," + (getPrecision() - getScale()) + "}");
          regex.append(")");
          return regex.toString();
      }
  
      /**
       * @return the allowNegative
       */
      public boolean isAllowNegative() {
          return this.allowNegative;
      }
  
      /**
       * @param allowNegative the allowNegative to set
       */
      public void setAllowNegative(boolean allowNegative) {
          this.allowNegative = allowNegative;
      }
  
      /**
       * @return the precision
       */
      public int getPrecision() {
          return this.precision;
      }
  
      /**
       * @param precision the precision to set
       */
      public void setPrecision(int precision) {
          this.precision = precision;
      }
  
      /**
       * @return the scale
       */
      public int getScale() {
          return this.scale;
      }
  
      /**
       * @param scale the scale to set
       */
      public void setScale(int scale) {
          this.scale = scale;
      }
  
     /**
      * 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) {
                 validationMessageParams.add(configService.getPropertyValueAsString(UifConstants.Messages.VALIDATION_MSG_KEY_PREFIX
                         + "positiveOrNegative"));
             } else {
                 validationMessageParams.add(configService.getPropertyValueAsString(UifConstants.Messages.VALIDATION_MSG_KEY_PREFIX
                         + "positive"));
             }
     
             validationMessageParams.add(Integer.toString(precision));
             validationMessageParams.add(Integer.toString(scale));
         }
         return validationMessageParams;
     }
 
 }