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.serializers;
  
  import java.nio.ByteBuffer;
  import java.nio.charset.CharacterCodingException;
  import java.nio.charset.Charset;
  
  import org.apache.commons.lang3.StringUtils;
  
  import org.apache.cassandra.db.marshal.ValueAccessor;
  import org.apache.cassandra.utils.ByteBufferUtil;
  
  public abstract class AbstractTextSerializer extends TypeSerializer<String>
  {
      private final Charset charset;
  
      protected AbstractTextSerializer(Charset charset)
      {
          this.charset = charset;
      }
  
      public <V> String deserialize(V value, ValueAccessor<V> accessor)
      {
          try
          {
              return accessor.toString(value, charset);
          }
          catch (CharacterCodingException e)
          {
              throw new MarshalException("Invalid " + charset + " bytes " + accessor.toHex(value));
          }
      }
  
      public ByteBuffer serialize(String value)
      {
          return ByteBufferUtil.bytes(value, charset);
      }
  
  
      @Override
      public String toString(String value)
      {
          return value;
      }
  
      public Class<String> getType()
      {
          return String.class;
      }
  
      @Override
      public boolean shouldQuoteCQLLiterals()
      {
          return true;
      }
  
      @Override
      public <V> boolean isNull(V buffer, ValueAccessor<V> accessor)
      {
          // !buffer.hasRemaining() is not "null" for string types, it is the empty string
          return buffer == null;
      }
  
      @Override
      protected String toCQLLiteralNonNull(ByteBuffer buffer)
      {
          return StringUtils.replace(deserialize(buffer), "'", "''");
      }
  }
  