package org.apache.tapestry5.internal.services.assets;
   
   import java.util.Map;
   
   import org.apache.tapestry5.services.assets.CompressionAnalyzer;
   
   public class CompressionAnalyzerImpl implements CompressionAnalyzer
   {
       private final Map<String, Boolean> configuration;
  
      public CompressionAnalyzerImpl(Map<String, Boolean> configuration)
      {
          this.configuration = configuration;
      }
  
      public boolean isCompressable(String contentType)
      {
          if (contentType == null) {
              throw new IllegalStateException("Content type provided to CompressionAnalyzer is null, which is not allowed.");
          }
  
          int x = contentType.indexOf(';');
  
          String key = x < 0 ? contentType : contentType.substring(0, x);
  
          Boolean result = configuration.get(key);
  
          if (result != null) {
              return result;
          }
  
          // Now look for a wild card.
  
          x = contentType.indexOf('/');
  
          String wildKey = contentType.substring(0, x) + "/*";
  
          result = configuration.get(wildKey);
  
          return result == null ? true : result;
      }
  }