// Copyright (c) 2009 The Chromium Authors. All rights reserved.

// Use of this source code is governed by a BSD-style license that can be

// found in the LICENSE file.

package org.chromium.sdk.internal.protocolparser.dynamicimpl;

import org.chromium.sdk.internal.protocolparser.JsonProtocolParseException;

/**

 * An internal facility for navigating from object of base type to object of subtype. Used only

 * when user wants to parse JSON object as subtype.

 * It works in terms of {@link ObjectData}.

 */

abstract class SubtypeCaster {

  private final Class<?> baseType;

  private final RefToType<?> subtypeRef;

  SubtypeCaster(Class<?> baseType, RefToType<?> subtypeRef) {

    this.baseType = baseType;

    this.subtypeRef = subtypeRef;

  }

  abstract ObjectData getSubtypeObjectData(ObjectData baseObjectData)

      throws JsonProtocolParseException;

  Class<?> getSubtype() {

    return subtypeRef.getTypeClass();

  }

  TypeHandler<?> getSubtypeHandler() {

    return subtypeRef.get();

  }

  Class<?> getBaseType() {

    return baseType;

  }

}