lang/java/avro/src/main/java/org/apache/avro/path/MapKeyPredicate.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
 *
 *     https://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.avro.path;

/**
 * Returns items by their position (string key under which they are stored) in a
 * map
 */
public class MapKeyPredicate implements PositionalPathPredicate {
  private final String key;

  public MapKeyPredicate(String key) {
    this.key = key;
  }

  public String getKey() {
    return key;
  }

  @Override
  public String toString() {
    if (key == null) {
      return "";
    }
    return "[\"" + key + "\"]";
  }
}