/*

  * 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.web.spring;

 import java.beans.PropertyEditorSupport;

 import java.text.DecimalFormat;

 import java.text.NumberFormat;

 import java.text.ParseException;

 import org.apache.log4j.Logger;

 import org.kuali.rice.core.util.RiceKeyConstants;

 import org.kuali.rice.core.util.type.KualiDecimal;

 import org.kuali.rice.core.util.type.KualiInteger;

 import org.kuali.rice.core.web.format.FormatException;

 /**

  * This class is used to format

  * <code>org.kuali.rice.core.util.type.KualiDecimal</code> in the local

  * currency.

  * 

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

  */

 public class UifCurrencyEditor extends PropertyEditorSupport {

     private static Logger LOG = Logger.getLogger(UifCurrencyEditor.class);

     /**

      * This overridden method ...

      * 

      * @see java.beans.PropertyEditorSupport#getAsText()

      */

     @Override

     public String getAsText() {

         Object obj = this.getValue();

         LOG.debug("format '" + obj + "'");

         if (obj == null)

             return null;

         NumberFormat formatter = getCurrencyInstanceUsingParseBigDecimal();

         String string = null;

         try {

             Number number = (Number) obj;

             if (obj instanceof KualiInteger) {

                 formatter.setMaximumFractionDigits(0);

             }

             string = formatter.format(number.doubleValue());

         } catch (IllegalArgumentException e) {

             throw new FormatException("formatting", RiceKeyConstants.ERROR_CURRENCY, obj.toString(), e);

         } catch (ClassCastException e) {

             throw new FormatException("formatting", RiceKeyConstants.ERROR_CURRENCY, obj.toString(), e);

         }

         return string;

     }

     /**

      * retrieves a currency formatter instance and sets ParseBigDecimal to true

      * to fix [KULEDOCS-742]

      * 

      * @return CurrencyInstance

      */

     private NumberFormat getCurrencyInstanceUsingParseBigDecimal() {

         NumberFormat formatter = NumberFormat.getCurrencyInstance();

         if (formatter instanceof DecimalFormat) {

             ((DecimalFormat) formatter).setParseBigDecimal(true);

         }

         return formatter;

     }

     /**

      * This overridden method sets the property value by parsing a given String.

      * It uses the <code>convertToObject</code> method to make the code

      * available to sub classes.

      * 

      * @see java.beans.PropertyEditorSupport#setAsText(java.lang.String)

      */

     @Override

     public void setAsText(String text) {

         this.setValue(convertToObject(text));

     }

     /**

      * Converts the string to a

      * <code>org.kuali.rice.core.util.type.KualiDecimal</code> object using the

      * local currency format.

      * 

      * @param text

      *            the text from the UI to convert

      * @return the <code>org.kuali.rice.core.util.type.KualiDecimal</code>

      *         object to be set on the bean

      */

     protected Object convertToObject(String text) {

         KualiDecimal value = null;

         LOG.debug("convertToObject '" + text + "'");

         if (text != null) {

             text = text.trim();

             NumberFormat formatter = getCurrencyInstanceUsingParseBigDecimal();

             // Add the currency symbol suffix/prefix to the text to change to

             // correct format

             if (formatter instanceof DecimalFormat) {

                 String prefix = ((DecimalFormat) formatter).getPositivePrefix();

                 String suffix = ((DecimalFormat) formatter).getPositiveSuffix();

                 if (!prefix.equals("") && !text.startsWith(prefix)) {

                     text = prefix.concat(text);

                 }

                 if (!suffix.equals("") && !text.endsWith(suffix)) {

                     text = text.concat(suffix);

                 }

             }

             try {

                 Number parsedNumber = formatter.parse(text);

                 value = new KualiDecimal(parsedNumber.toString());

             } catch (NumberFormatException e) {

                 throw new FormatException("parsing", RiceKeyConstants.ERROR_CURRENCY, text, e);

             } catch (ParseException e) {

                 throw new FormatException("parsing", RiceKeyConstants.ERROR_CURRENCY, text, e);

             }

         }

         return value;

     }

 }