TupleMarshalledBinding.java

package com.sleepycat.bind.tuple;
import com.sleepycat.util.RuntimeExceptionWrapper;
import de.ovgu.cide.jakutil.*;
/** 
 * A concrete <code>TupleBinding</code> that delegates to the
 * <code>MarshalledTupleEntry</code> interface of the data or key object.
 * <p>
 * This class works by calling the methods of the {@link MarshalledTupleEntry}interface, which must be implemented by the key or data class, to convert
 * between the key or data entry and the object.
 * </p>
 * @author Mark Hayes
 */
public class TupleMarshalledBinding extends TupleBinding {
  private Class cls;
  /** 
 * Creates a tuple marshalled binding object.
 * <p>
 * The given class is used to instantiate key or data objects using{@link Class#forName}, and therefore must be a public class and have a
 * public no-arguments constructor. It must also implement the {@link MarshalledTupleEntry} interface.
 * </p>
 * @param clsis the class of the key or data objects.
 */
  public TupleMarshalledBinding(  Class cls){
    this.cls=cls;
    if (!MarshalledTupleEntry.class.isAssignableFrom(cls)) {
      throw new IllegalArgumentException(cls.toString() + " does not implement MarshalledTupleEntry");
    }
  }
  public Object entryToObject(  TupleInput input){
    try {
      MarshalledTupleEntry obj=(MarshalledTupleEntry)cls.newInstance();
      obj.unmarshalEntry(input);
      return obj;
    }
 catch (    IllegalAccessException e) {
      throw new RuntimeExceptionWrapper(e);
    }
catch (    InstantiationException e) {
      throw new RuntimeExceptionWrapper(e);
    }
  }
  public void objectToEntry(  Object object,  TupleOutput output){
    MarshalledTupleEntry obj=(MarshalledTupleEntry)object;
    obj.marshalEntry(output);
  }
}