content: /*
   * 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.testing;
  
  import com.fasterxml.jackson.core.JsonParser;
  import com.fasterxml.jackson.core.JsonProcessingException;
  import com.fasterxml.jackson.databind.DeserializationContext;
  import com.fasterxml.jackson.databind.JsonDeserializer;
  import com.fasterxml.jackson.databind.node.ObjectNode;
  import java.io.IOException;
  import org.apache.beam.sdk.util.SerializableUtils;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.io.BaseEncoding;
  
  /** MatcherDeserializer is used with Jackson to enable deserialization of SerializableMatchers. */
  class MatcherDeserializer extends JsonDeserializer<SerializableMatcher<?>> {
    @Override
    public SerializableMatcher<?> deserialize(
        JsonParser jsonParser, DeserializationContext deserializationContext)
        throws IOException, JsonProcessingException {
      ObjectNode node = jsonParser.readValueAsTree();
      String matcher = node.get("matcher").asText();
      byte[] in = BaseEncoding.base64().decode(matcher);
      return (SerializableMatcher<?>)
          SerializableUtils.deserializeFromByteArray(in, "SerializableMatcher");
    }
  }
  