How to describe a hbase table with Column family and column qualifiers

package m7example;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.NavigableMap;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.util.Bytes;
/*
 * command to run the program
java -cp  m7example-0.0.1-jar-with-dependencies.jar:`hbase classpath` m7example.RetrieveData2 <tableName>
 */

public class RetrieveData2{

   public static void main(String[] args) throws IOException, Exception{
 

  String tableName=null;

if(args.length>0)
{
if(args[0] != null)
{
System.out.println("Table Name is "+args[0]);
tableName=args[0];
}
}
else
{
System.out.println("Please input table name (with full path) as argument");
System.exit(0);
}



      // Instantiating Configuration class
      Configuration config = HBaseConfiguration.create();

      // Instantiating HTable class
      //HTable table = new HTable(config, "/path/students");

   
      HTable table = new HTable(config,tableName);

      // Instantiating configuration class
      Configuration conf = HBaseConfiguration.create();

      // Instantiating HBaseAdmin class
      HBaseAdmin admin = new HBaseAdmin(conf);

      // Verifying the existance of the table
      boolean bool = admin.tableExists(tableName);
   
      if(!bool)
      {
      System.out.println(tableName+" does n't exist");
      System.exit(0);
      }
   

   
   
       Scan scan = new Scan();
      //Scan scan = new Scan(Bytes.toBytes("000"),Bytes.toBytes("001")); //use start-row/stop-row if you want to limit the full table scan
       ResultScanner scanner = table.getScanner(scan);

 

ArrayList<String> cf =new ArrayList<String>();

System.out.println("Please be patient, I am doing a full table scan");
System.out.print("=");

for (Result rr = scanner.next(); rr != null; rr = scanner.next()) {



System.out.print(".");

//String rowKey= Bytes.toString(rr.getRow());

Iterator<KeyValue> iter = rr.list().iterator();
while (iter.hasNext()) {
KeyValue kv = iter.next();

if(!cf.contains(Bytes.toString(kv.getFamily())))
{
cf.add(Bytes.toString(kv.getFamily()));
System.out.print("=");
}





}//while


}

ArrayList<String> qf[] = new ArrayList[cf.size()]; //Put the length of the array you need

   for(int x = 0; x < qf.length; x++){
       qf[x] = new ArrayList<>();
   }
 


scan = new Scan();
            scanner = table.getScanner(scan);

int index=0;

System.out.println("Scanning qualifiers of Column family ");
System.out.print("=");

for (Result rr = scanner.next(); rr != null; rr = scanner.next()) {

index=0;

for(String y:cf)
{
//System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
//System.out.println("Scanning qualifiers of Column family " + y);
//System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");

//index=cf.indexOf(y);

for (String p: getColumnsOfCF(rr,y))
     {

    if(!qf[index].contains(p))
    {
    qf[index].add(p);
    System.out.print("=");
    }

     }

index++;
}

}


System.out.println("ColumnFamily and ColumnQualifiers of "+tableName);
System.out.println("============================================================================");
index=0;

for(index=0;index<cf.size();index++)
{
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~");
System.out.println(cf.get(index));
System.out.println("~~~~~~~~~~~~~~~~~~~~~~~");


for(String x:qf[index])
{
System.out.println(cf.get(index)+":"+x);
}

}

   
      table.close();
   }
 
   public static String[]  getColumnsOfCF(Result r, String ColumnFamily)
   {

         NavigableMap<byte[], byte[]> familyMap = r.getFamilyMap(Bytes.toBytes(ColumnFamily));
         String[] qfs = new String[familyMap.size()];

         int counter = 0;
         for(byte[] bytqfs : familyMap.keySet())
         {
             qfs [counter++] = Bytes.toString(bytqfs );

         }

         return qfs ;
       

   }
 
 
}


Pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.mapr.support</groupId>
  <artifactId>m7example</artifactId>
  <version>0.0.1</version>


  <repositories>
<repository>
<id>mapr-maven</id>
<url>http://repository.mapr.com/maven</url>
<releases><enabled>true</enabled></releases>
<snapshots><enabled>false</enabled></snapshots>
</repository>
  </repositories>

 
  <dependencies>


<dependency>
  <groupId>org.apache.hbase</groupId>
  <artifactId>hbase</artifactId>
  <version>0.94.13-mapr-1401-m7-3.1.0</version>
  </dependency>

  </dependencies>


<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>5</source>
<target>5</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>m7example.M7Demo</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

</project>


Shell script to call the java program

hbase-describe-All.sh
~~~~~~~~~~~~~~~~
#!/bin/bash

ARGS_EXPECTED=1

if [ $# -ne $ARGS_EXPECTED ]
then
  echo "[$HOSTNAME]: Usage: `basename $0` table_name(with full path)"
  exit 1
fi

java -cp  /path-to-jar/m7example-0.0.1-jar-with-dependencies.jar:`hbase classpath` m7example.RetrieveData2 $1