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.extensions.protobuf;
  
  import com.google.protobuf.DynamicMessage;
  import com.google.protobuf.Message;
  import org.hamcrest.BaseMatcher;
  import org.hamcrest.Description;
  
  /**
   * Is the DynamicMessage equal to another message. This special matcher exist because the
   * DynamicMessage is protobuf does a object equality in it's equals operator.
   *
   * <p>Follow https://github.com/protocolbuffers/protobuf/issues/6100 for tracking the issue. If this
   * is resolved we can remove this code.
   */
  public class IsDynamicMessageEqual extends BaseMatcher<DynamicMessage> {
    private final DynamicMessage expectedValue;
  
    public IsDynamicMessageEqual(DynamicMessage equalArg) {
      expectedValue = equalArg;
    }
  
    public static IsDynamicMessageEqual equalTo(DynamicMessage operand) {
      return new IsDynamicMessageEqual(operand);
    }
  
    @Override
    public boolean matches(Object actualValue) {
  
      if (actualValue == null) {
        return expectedValue == null;
      }
  
      if (!(actualValue instanceof Message)) {
        return false;
      }
      final Message actualMessage = (Message) actualValue;
  
      if (!actualMessage.toByteString().equals(expectedValue.toByteString())) {
        return false;
      }
  
      return actualMessage
          .getDescriptorForType()
          .getFullName()
          .equals(expectedValue.getDescriptorForType().getFullName());
    }
  
    @Override
    public void describeTo(Description description) {
      description.appendValue(expectedValue);
    }
  }
  