/**
    * Copyright 2005-2013 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.krad.datadictionary.parse.BeanTag;
  import org.kuali.rice.krad.datadictionary.parse.BeanTagAttribute;
  import org.kuali.rice.krad.messages.MessageService;
  import org.kuali.rice.krad.service.KRADServiceLocatorWeb;
  import org.kuali.rice.krad.uif.UifConstants;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Validation pattern for matching floating point numbers, optionally matching negative numbers
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  @BeanTag(name = "floatingPointPatternConstraint-bean", parent = "FloatingPointPatternConstraint")
  public class FloatingPointPatternConstraint extends ConfigurationBasedRegexPatternConstraint {
  
      protected boolean allowNegative;
  
      /**
       * @see org.kuali.rice.krad.datadictionary.validation.constraint.ValidCharactersPatternConstraint#getRegexString()
       */
      @Override
      protected String getRegexString() {
          StringBuffer regex = new StringBuffer();
  
          if (isAllowNegative()) {
              regex.append("-?");
          }
          regex.append(super.getRegexString());
  
          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;
      }
  
      /**
       * @see org.kuali.rice.krad.datadictionary.validation.constraint.ValidDataPatternConstraint#getValidationMessageParams()
       */
      @Override
      public List<String> getValidationMessageParams() {
          if (validationMessageParams == null) {
              validationMessageParams = new ArrayList<String>();
              MessageService messageService = KRADServiceLocatorWeb.getMessageService();
              if (allowNegative) {
                  validationMessageParams.add(messageService.getMessageText(
                          UifConstants.Messages.VALIDATION_MSG_KEY_PREFIX + "positiveOrNegative"));
              } else {
                  validationMessageParams.add(messageService.getMessageText(
                          UifConstants.Messages.VALIDATION_MSG_KEY_PREFIX + "positive"));
              }
          }
          return validationMessageParams;
      }
  }