Please help complete below java code. I have already have Tuples, Schema classes and other interfaces. package heapdb;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

public class Table implements ITable $\{$

private List tuples;

private Schema schema;

public Table$($Schema schema$)\{$

this.schema $=$ schema;

tuples $=$ new ArrayList$<>()$;

$\}$

@Override

public Schema getSchema$()\{$

return schema;

$\}$

@Override

public int size$()\{$

return tuples.size$()$;

$\}$

@Override

public void close$()\{$

$//$ do nothing

$\}$

@Override

public boolean insert$($Tuple rec$)\{$

if $(!$ rec.getSchema$().$equals$($schema$))\{$

throw new IllegalStateException$("$Error: tuple schema does not match table schema."$)$;

$\}$

$//$ if schema has no key, then just add the tuple.

$//$ if schema has key, see if key already exists in table

$//$ TODO

throw new UnsupportedOperationException$()$;

$\}$

@Override

public boolean delete$($Object key$)\{$

if $($schema$.$getKey$()==$ null$)\{$

throw new IllegalStateException$("$Error: table does not have a primary key. Can not delete."$)$;

$\}$

$//$ TODO

throw new UnsupportedOperationException$()$;

$\}$

@Override

public Tuple lookup$($Object key$)\{$

if $($schema$.$getKey$()==$ null$)\{$

throw new IllegalStateException$("$Error: table does not have a primary key. Can not lookup by key."$)$;

$\}$

$//$ TODO

throw new UnsupportedOperationException$()$;

$\}$

@Override

public ITable lookup$($String colname, Object value$)\{$

if $($schema$.$getColumnIndex$($colname$)<0)\{$

throw new IllegalStateException$("$Error: table does not contain column $"+$colname$)$;

$\}$

Table result $=$ new Table$($this$.$getSchema$())$;

$//$ find all tuples that satisfy the predicate colname$=$value

$//$ and insert the tuples to result table.

$//$ return the result

$//$ TODO

throw new UnsupportedOperationException$()$;

$\}$

@Override

public Iterator iterator$()\{$

return tuples.iterator$()$;

$\}$

public String toString$()\{$

if $($tuples$.$isEmpty$())\{$

return "Empty Table";

$\}$ else $\{$

StringBuilder sb $=$ new StringBuilder$()$;

for $($Tuple t : this$)\{$

sb$.$append$($t$.$toString$())$;

sb$.$append$("$

$")$;

$\}$

return sb$.$toString$()$;

$\}$

$\}$

$\}$