/**
* 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.ambari.view.huetoambarimigration.utils;
import org.apache.ambari.view.ViewContext;
import org.apache.hadoop.fs.FSDataInputStream;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.Arrays;
import static java.lang.Math.ceil;
/**
* Pagination for HDFS file implementation
*/
public class FilePaginator {
private static int PAGE_SIZE = 1*1024*1024; // 1MB
private String filePath;
private ViewContext context;
/**
* Constructor
* @param filePath Path to file on HDFS
* @param context View Context instance
*/
public FilePaginator(String filePath, ViewContext context) {
this.filePath = filePath;
this.context = context;
}
/**
* Set page size
* @param PAGE_SIZE size
*/
public static void setPageSize(int PAGE_SIZE) {
FilePaginator.PAGE_SIZE = PAGE_SIZE;
}
/**
* Get page count
* @return page count
* @throws IOException
* @throws InterruptedException
*/
/**
* Read one page of size PAGE_SIZE
* @param page page index
* @return data in UTF-8
* @throws IOException
* @throws InterruptedException
*/
}