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.cassandra.cql3.functions.types;
  
  import java.util.*;
  
  import com.google.common.reflect.TypeParameter;
  import com.google.common.reflect.TypeToken;
  
  /**
   * Utility methods to create {@code TypeToken} instances.
   */
  public final class TypeTokens
  {
      private TypeTokens()
      {
      }
  
      /**
       * Create a {@link TypeToken} that represents a {@link List} whose elements are of the given type.
       *
       * @param eltType The list element type.
       * @param <T>     The list element type.
       * @return A {@link TypeToken} that represents a {@link List} whose elements are of the given
       * type.
       */
      public static <T> TypeToken<List<T>> listOf(Class<T> eltType)
      {
          // @formatter:off
          return new TypeToken<List<T>>()
          {
          }.where(new TypeParameter<T>()
          {
          }, eltType);
          // @formatter:on
      }
  
      /**
       * Create a {@link TypeToken} that represents a {@link List} whose elements are of the given type.
       *
       * @param eltType The list element type.
       * @param <T>     The list element type.
       * @return A {@link TypeToken} that represents a {@link List} whose elements are of the given
       * type.
       */
      public static <T> TypeToken<List<T>> listOf(TypeToken<T> eltType)
      {
          // @formatter:off
          return new TypeToken<List<T>>()
          {
          }.where(new TypeParameter<T>()
          {
          }, eltType);
          // @formatter:on
      }
  
      /**
       * Create a {@link TypeToken} that represents a {@link Set} whose elements are of the given type.
       *
       * @param eltType The set element type.
       * @param <T>     The set element type.
       * @return A {@link TypeToken} that represents a {@link Set} whose elements are of the given type.
       */
      public static <T> TypeToken<Set<T>> setOf(Class<T> eltType)
      {
          // @formatter:off
          return new TypeToken<Set<T>>()
          {
          }.where(new TypeParameter<T>()
          {
          }, eltType);
          // @formatter:on
      }
  
      /**
       * Create a {@link TypeToken} that represents a {@link Set} whose elements are of the given type.
       *
       * @param eltType The set element type.
       * @param <T>     The set element type.
       * @return A {@link TypeToken} that represents a {@link Set} whose elements are of the given type.
       */
      public static <T> TypeToken<Set<T>> setOf(TypeToken<T> eltType)
      {
          // @formatter:off
          return new TypeToken<Set<T>>()
          {
          }.where(new TypeParameter<T>()
          {
          }, eltType);
          // @formatter:on
      }
  
      /**
       * Create a {@link TypeToken} that represents a {@link Map} whose keys and values are of the given
       * key and value types.
       *
       * @param keyType   The map key type.
       * @param valueType The map value type
       * @param <K>       The map key type.
       * @param <V>       The map value type
       * @return A {@link TypeToken} that represents a {@link Map} whose keys and values are of the
       * given key and value types
       */
      public static <K, V> TypeToken<Map<K, V>> mapOf(Class<K> keyType, Class<V> valueType)
      {
          // @formatter:off
          return new TypeToken<Map<K, V>>()
          {
          }.where(new TypeParameter<K>()
          {
          }, keyType)
           .where(new TypeParameter<V>()
           {
           }, valueType);
          // @formatter:on
      }
  
      /**
       * Create a {@link TypeToken} that represents a {@link Map} whose keys and values are of the given
       * key and value types.
       *
       * @param keyType   The map key type.
       * @param valueType The map value type
       * @param <K>       The map key type.
       * @param <V>       The map value type
       * @return A {@link TypeToken} that represents a {@link Map} whose keys and values are of the
       * given key and value types
       */
      public static <K, V> TypeToken<Map<K, V>> mapOf(TypeToken<K> keyType, TypeToken<V> valueType)
      {
          // @formatter:off
          return new TypeToken<Map<K, V>>()
          {
          }.where(new TypeParameter<K>()
          {
          }, keyType)
           .where(new TypeParameter<V>()
           {
           }, valueType);
          // @formatter:on
      }
  
      /**
       * Create a {@link TypeToken} that represents a {@link TypeToken} whose elements are of the given type.
       *
       * @param eltType The vector element type.
       * @param <T>     The vector element type.
       * @return A {@link TypeToken} that represents a {@link TypeToken} whose elements are of the given
       * type.
       */
      public static <T> TypeToken<List<T>> vectorOf(TypeToken<T> eltType)
      {
          // @formatter:off
          return new TypeToken<List<T>>()
          {
          }.where(new TypeParameter<T>()
          {
          }, eltType);
          // @formatter:on
      }
  }
  