package org.springmodules.validation.bean.context.web;
   
   import java.beans.PropertyEditorSupport;
   
   import org.springframework.util.StringUtils;
   
   /**
    * A property editor for the {@link ValidationContextUrlMapping} class.
    * <p/>
   * This editor expects text in the following format:
   * <p/>
   *              <center><i>url_pattern=context1,context2,...,contextN</i></center>
   * <p/>
   * Where <i>url_pattern</i> is the URL pattern to be mapped to the context tokens and
   * <i>context1,context2,...,contextN</i> is the comma-separated list of validation context tokens.
   *
   * @author Uri Boness
   */
  public class ValidationContextUrlMappingArrayPropertyEditor extends PropertyEditorSupport {
  
      private final static String MAPPINGS_SEPARATORS = "\n\r";
      private final static char MAPPING_OPERATOR = '=';
  
      public String getAsText() {
          throw new UnsupportedOperationException("This property edito only supports one way conversion (text to value)");
      }
  
      public void setAsText(String text) throws IllegalArgumentException {
          text = text.trim();
          String[] mappingLines = StringUtils.tokenizeToStringArray(text, MAPPINGS_SEPARATORS);
          ValidationContextUrlMapping[] mappings = new ValidationContextUrlMapping[mappingLines.length];
          for (int i=0; i<mappings.length; i++) {
              String mappingLine = mappingLines[i].trim();
              int index = mappingLine.lastIndexOf(MAPPING_OPERATOR);
              String pattern = mappingLine.substring(0, index);
              String tokensString = mappingLine.substring(index+1, mappingLine.length());
              String[] tokens = StringUtils.commaDelimitedListToStringArray(tokensString);
              mappings[i] = new ValidationContextUrlMapping(pattern, tokens);
          }
          setValue(mappings);
      }
  
  }