/**

  * Copyright 2005-2011 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;

 /**

  * Validation pattern for matching floating point numbers, optionally matching negative numbers

  * 

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

  */

 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

      */

     public boolean isAllowNegative() {

         return this.allowNegative;

     }

     /**

      * @param allowNegative the allowNegative to set

      */

     public void setAllowNegative(boolean allowNegative) {

         this.allowNegative = allowNegative;

     }

     /**

      * 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"));

             }

         }

         return validationMessageParams;

     }

 }