/**
 * 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.hadoop.nfs.nfs3.request;

import java.io.IOException;
import java.nio.charset.StandardCharsets;

import org.apache.hadoop.nfs.nfs3.FileHandle;
import org.apache.hadoop.nfs.nfs3.Nfs3Constant;
import org.apache.hadoop.oncrpc.XDR;

/**
 * CREATE3 Request
 */
public class CREATE3Request extends RequestWithHandle {
  private final String name;
  private final int mode;
  private final SetAttr3 objAttr;
  private long verf = 0;

  public CREATE3Request(FileHandle handle, String name, int mode,
      SetAttr3 objAttr, long verf) {
    super(handle);
    this.name = name;
    this.mode = mode;
    this.objAttr = objAttr;
    this.verf = verf;
  }
  
  public static CREATE3Request deserialize(XDR xdr) throws IOException {
    FileHandle handle = readHandle(xdr);
    String name = xdr.readString();
    int mode = xdr.readInt();
    SetAttr3 objAttr = new SetAttr3();
    long verf = 0;
    if ((mode == Nfs3Constant.CREATE_UNCHECKED)
        || (mode == Nfs3Constant.CREATE_GUARDED)) {
      objAttr.deserialize(xdr);
    } else if (mode == Nfs3Constant.CREATE_EXCLUSIVE) {
      verf = xdr.readHyper();
    } else {
      throw new IOException("Wrong create mode:" + mode);
    }
    return new CREATE3Request(handle, name, mode, objAttr, verf);
  }

  public String getName() {
    return name;
  }

  public int getMode() {
    return mode;
  }

  public SetAttr3 getObjAttr() {
    return objAttr;
  }

  public long getVerf() {
    return verf;
  }
  
  @Override
  public void serialize(XDR xdr) {
    handle.serialize(xdr);
    xdr.writeInt(name.length());
    xdr.writeFixedOpaque(name.getBytes(StandardCharsets.UTF_8), name.length());
    xdr.writeInt(mode);
    objAttr.serialize(xdr);
  }

}
