package org.lcsim.conditions.readers;
   
   import java.io.File;
   import java.io.IOException;
   import java.io.InputStream;
   import java.util.zip.ZipEntry;
   import java.util.zip.ZipFile;
   
   import org.lcsim.conditions.ConditionsReader;
  
  public class ZipConditionsReader extends ConditionsReader {
  
      private ZipFile zip;
  
      public ZipConditionsReader(File file) throws IOException {
          this.zip = new ZipFile(file, ZipFile.OPEN_READ);
      }
  
      public InputStream open(String name, String type) throws IOException {
          ZipEntry entry = zip.getEntry(name + "." + type);
          if (entry == null) {
              throw new IOException("Conditions " + name + "." + type + " not found");
          }
          return zip.getInputStream(entry);
      }
  
      public void close() throws IOException {
          zip.close();
      }
  }