content: /*
   * Copyright 2024-2025 the original author or authors.
   *
   * Licensed 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 com.alibaba.cloud.ai.graph.serializer.plain_text.jackson;
  
  import java.util.HashSet;
  import java.util.Objects;
  import java.util.Optional;
  import java.util.Set;
  
  import com.fasterxml.jackson.core.type.TypeReference;
  
  public class TypeMapper {
  
  	public static String TYPE_PROPERTY = "@type";
  
  	private final Set<Reference<?>> references = new HashSet<>();
  
  	public <T> TypeMapper register(Reference<T> reference) {
  		Objects.requireNonNull(reference, "reference cannot be null");
  		references.add(reference);
  		return this;
  	}
  
  	public <T> boolean unregister(Reference<T> reference) {
  		Objects.requireNonNull(reference, "reference cannot be null");
  		return references.remove(reference);
  	}
  
  	public Optional<Reference<?>> getReference(String type) {
  		Objects.requireNonNull(type, "type cannot be null");
  		return references.stream().filter(ref -> Objects.equals(ref.getTypeName(), type)).findFirst();
  	}
  
  	public static abstract class Reference<T> extends TypeReference<T> {
  
  		private final String typeName;
  
  		public Reference(String typeName) {
  			super();
  			this.typeName = Objects.requireNonNull(typeName, "typeName cannot be null");
  		}
  
  		public String getTypeName() {
  			return typeName;
  		}
  
  	}
  
  }
  