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 com.datastax.oss.driver.internal.querybuilder;
  
  import com.datastax.oss.driver.api.core.CqlIdentifier;
  import com.datastax.oss.driver.api.core.type.codec.TypeCodec;
  import com.datastax.oss.driver.api.querybuilder.Literal;
  import com.datastax.oss.driver.api.querybuilder.select.Selector;
  import com.datastax.oss.driver.shaded.guava.common.base.Preconditions;
  import edu.umd.cs.findbugs.annotations.NonNull;
  import edu.umd.cs.findbugs.annotations.Nullable;
  import net.jcip.annotations.Immutable;
  
  @Immutable
  public class DefaultLiteral<ValueT> implements Literal {
  
    private final ValueT value;
    private final TypeCodec<ValueT> codec;
    private final CqlIdentifier alias;
  
    public DefaultLiteral(@Nullable ValueT value, @Nullable TypeCodec<ValueT> codec) {
      this(value, codec, null);
    }
  
    public DefaultLiteral(
        @Nullable ValueT value, @Nullable TypeCodec<ValueT> codec, @Nullable CqlIdentifier alias) {
      Preconditions.checkArgument(
          value == null || codec != null, "Must provide a codec if the value is not null");
      this.value = value;
      this.codec = codec;
      this.alias = alias;
    }
  
    @Override
    public void appendTo(@NonNull StringBuilder builder) {
      if (value == null) {
        builder.append("NULL");
      } else {
        builder.append(codec.format(value));
      }
      if (alias != null) {
        builder.append(" AS ").append(alias.asCql(true));
      }
    }
  
    @Override
    public boolean isIdempotent() {
      return true;
    }
  
    @NonNull
    @Override
    public Selector as(@NonNull CqlIdentifier alias) {
      return new DefaultLiteral<>(value, codec, alias);
    }
  
    @Nullable
    public ValueT getValue() {
      return value;
    }
  
    @Nullable
    public TypeCodec<ValueT> getCodec() {
      return codec;
    }
  
    @Nullable
    @Override
    public CqlIdentifier getAlias() {
      return alias;
    }
  }
  