/*

  * 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.commons.compress.changes;

 import java.io.InputStream;

 import org.apache.commons.compress.archivers.ArchiveEntry;

 /**

  * Change holds meta information about a change.

  * 

  * @Immutable

  */

 class Change {

     private final String targetFile; // entry name to delete

     private final ArchiveEntry entry; // new entry to add

     private final InputStream input; // source for new entry

     private final boolean replaceMode; // change should replaceMode existing entries

     // Type of change

     private final int type;

     // Possible type values

     static final int TYPE_DELETE = 1;

     static final int TYPE_ADD = 2;

     static final int TYPE_MOVE = 3; // NOT USED

     static final int TYPE_DELETE_DIR = 4;

     /**

      * Constructor. Takes the filename of the file to be deleted

      * from the stream as argument.

      * @param pFilename the filename of the file to delete

      */

     Change(final String pFilename, int type) {

         if(pFilename == null) {

             throw new NullPointerException();

         }

         this.targetFile = pFilename;

         this.type = type;

         this.input = null;

         this.entry = null;

         this.replaceMode = true;

     }

     /**

      * Construct a change which adds an entry.

      * 

      * @param pEntry the entry details

      * @param pInput the InputStream for the entry data

      */

     Change(final ArchiveEntry pEntry, final InputStream pInput, boolean replace) {

         if(pEntry == null || pInput == null) {

             throw new NullPointerException();

         }

         this.entry = pEntry;

         this.input = pInput;

         type = TYPE_ADD;

         targetFile = null;

         this.replaceMode = replace;

     }

     ArchiveEntry getEntry() {

         return entry;

     }

     InputStream getInput() {

         return input;

     }

     String targetFile() {

         return targetFile;

     }

     int type() {

         return type;

     }

     boolean isReplaceMode() {

         return replaceMode;

     }

 }