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  package org.apache.cayenne.crypto.transformer;
  
  import org.apache.cayenne.access.translator.DbAttributeBinding;
  import org.apache.cayenne.access.types.ExtendedType;
  import org.apache.cayenne.access.types.ExtendedTypeMap;
  import org.apache.cayenne.crypto.transformer.bytes.BytesEncryptor;
  import org.apache.cayenne.crypto.transformer.value.ValueEncryptor;
  
  /**
   * @since 4.0
   */
  public class DefaultBindingsTransformer implements BindingsTransformer {
  
      private int[] positions;
      private ValueEncryptor[] transformers;
      private BytesEncryptor encryptor;
      private ExtendedTypeMap extendedTypeMap;
  
      public DefaultBindingsTransformer(int[] positions,
                                        ValueEncryptor[] transformers,
                                        BytesEncryptor encryptor,
                                        ExtendedTypeMap extendedTypeMap) {
          this.positions = positions;
          this.transformers = transformers;
          this.encryptor = encryptor;
          this.extendedTypeMap = extendedTypeMap;
      }
  
      @Override
      public void transform(DbAttributeBinding[] bindings) {
  
          int len = positions.length;
  
          for (int i = 0; i < len; i++) {
              DbAttributeBinding b = bindings[positions[i]];
              Object transformed = transformers[i].encrypt(encryptor, b.getValue());
              b.setValue(transformed);
  
              ExtendedType extendedType = transformed != null
                      ? extendedTypeMap.getRegisteredType(transformed.getClass())
                      : extendedTypeMap.getDefaultType();
  
              b.setExtendedType(extendedType);
          }
      }
  
  }
  