sdks/java/core/src/main/java/org/apache/beam/sdk/state/StateKeySpec.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.beam.sdk.state;

import org.apache.beam.sdk.annotations.Experimental;
import org.apache.beam.sdk.annotations.Experimental.Kind;
import org.apache.beam.sdk.schemas.FieldAccessDescriptor;

@Experimental(Kind.SCHEMAS)
public class StateKeySpec {
  private final FieldAccessDescriptor keyDescriptor;

  private StateKeySpec(FieldAccessDescriptor keyDescriptor) {
    this.keyDescriptor = keyDescriptor;
  }

  public static StateKeySpec fields(String fieldNames) {
    return new StateKeySpec(FieldAccessDescriptor.withFieldNames(fieldNames));
  }

  public static StateKeySpec fields(FieldAccessDescriptor fieldAccessDescriptor) {
    return new StateKeySpec(fieldAccessDescriptor);
  }
}