// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
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// modification, are permitted provided that the following conditions are
// met:
//
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// notice, this list of conditions and the following disclaimer.
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// in the documentation and/or other materials provided with the
// distribution.
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//
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package com.google.protobuf;

import java.lang.reflect.Field;

/** Information for a oneof within a protobuf message. */
// TODO(nathanmittler): make this private once all of experimental code is migrated to protobuf.
@ExperimentalApi
@CheckReturnValue
final class OneofInfo {
  private final int id;
  private final Field caseField;
  private final Field valueField;

  public OneofInfo(int id, Field caseField, Field valueField) {
    this.id = id;
    this.caseField = caseField;
    this.valueField = valueField;
  }

  /**
   * Returns the unique identifier of the oneof within the message. This is really just an index
   * starting at zero.
   */
  public int getId() {
    return id;
  }

  /** The {@code int} field containing the field number of the currently active member. */
  public Field getCaseField() {
    return caseField;
  }

  /** The {@link Object} field containing the value of the currently active member. */
  public Field getValueField() {
    return valueField;
  }
}