content: /*
   * Copyright 2020 Alibaba Group Holding Limited.
   *
   * 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
   *
   * 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.alibaba.graphscope.common.jna.type;
  
  import com.alibaba.graphscope.common.jna.IrCoreLibrary;
  import com.sun.jna.Pointer;
  import com.sun.jna.PointerType;
  
  import org.apache.commons.lang3.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class FfiString extends PointerType {
      private static final Logger logger = LoggerFactory.getLogger(FfiString.class);
      private final String value;
  
      public FfiString(Pointer cstr) {
          super(cstr);
          this.value = (cstr == null) ? StringUtils.EMPTY : cstr.getString(0);
          release();
      }
  
      public String getValue() {
          return this.value;
      }
  
      private void release() {
          Pointer cstr = getPointer();
          if (cstr != null) {
              logger.debug("free ffi str pointed by {}", cstr);
              IrCoreLibrary.INSTANCE.destroyCstrPointer(cstr);
          }
      }
  }
  