/**
    * 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.web.bind;
  
  import org.apache.log4j.Logger;
  import org.kuali.rice.core.api.util.RiceKeyConstants;
  import org.kuali.rice.core.api.util.type.KualiDecimal;
  import org.kuali.rice.core.api.util.type.KualiInteger;
  import org.kuali.rice.core.web.format.FormatException;
  
  import java.beans.PropertyEditorSupport;
  import java.text.DecimalFormat;
  import java.text.NumberFormat;
  import java.text.ParseException;
  
  /**
   * This class is used to format
   * <code>org.kuali.rice.core.api.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.api.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.api.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;
     }
 
 }