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*/
package com.sun.appserv.management.util.misc;
import java.util.Set;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
/**
@deprecated use GSetUtil
*/
public final class SetUtil
{
private
SetUtil( )
{
// disallow instantiation
}
public static <T> T
getSingleton( final Set<T> s )
{
if ( s.size() != 1 )
{
throw new IllegalArgumentException( s.toString() );
}
return( s.iterator().next() );
}
/**
Add all items in an array to a set.
*/
public static <T> void
addArray(
final Set<T> set,
final T[] array )
{
for( int i = 0; i < array.length; ++i )
{
set.add( array[ i ] );
}
}
/**
Convert a Set to a String[]
*/
public static String[]
toStringArray( final Set set )
{
final String[] strings = new String[ set.size() ];
final Iterator iter = set.iterator();
int i = 0;
while ( iter.hasNext() )
{
strings[ i ] = iter.next().toString();
++i;
}
return( strings );
}
/**
Convert a Set to a String[]
*/
public static Object[]
toArray( final Set<?> set )
{
final Object[] names = new Object[ set.size() ];
set.toArray( names );
return( names );
}
/**
Create a new Set with one member.
*/
public static <T> Set<T>
newSet( final Collection<T> c )
{
final Set<T> set = new HashSet<T>();
set.addAll( c );
return( set );
}
/**
Create a new Set with one member. Additional items
may be added.
*/
public static <T> Set<T>
newSingletonSet( final T m1 )
{
final Set<T> set = new HashSet<T>();
set.add( m1 );
return( set );
}
/**
Create a new Set containing all members of another.
The returned Set is always a HashSet.
*/
public static <T> HashSet<T>
copySet( final Set<T> s1 )
{
final HashSet<T> set = new HashSet<T>();
set.addAll( s1 );
return( set );
}
/**
Create a new Set containing all array elements.
*/
public static <T> Set<T>
newSet( final Set<? extends T>[] sets )
{
final Set<T> s = new HashSet<T>();
for( int i = 0; i < sets.length; ++i )
{
s.addAll( sets[ i ] );
}
return( s );
}
/*
private void
doIt()
{
final Set<String> strings = new HashSet<String>();
*
final Set<String>[] stringSets = new Set[] { strings, strings};
final Set<String> test = newSet( stringSets );
final Set<Integer> n1 = new HashSet<Integer>();
final Set<Float> n2 = new HashSet<Float>();
final Set<Number>[] numberSets = new Set[] { n1, n2 };
final Set<Number> nn = newSet( numberSets );
final Set<? extends java.io.Serializable> x = newSet(s1, n1);
*
final Set<String> xx = newSet(strings, strings);
final Set<String> xxx = newSet(strings, strings, strings);
final Set<String> xxxx = newSet(strings, strings, strings, strings);
final Set<String> aa = newSet( "1", "2" );
final Set<String> aaa = newSet( "1", "2", "3" );
// final Set<String> aaaa = newSet( "1", "2", "3", new Integer(10) );
final Set<String> zzzz = newSet( "1", "2", "3", "4", "6", "7");
}
*/
/**
Create a new Set consisting of the contents of two sets.
*/
public static <T> Set<T>
newSet(
final Set<? extends T> s1,
final Set<? extends T> s2)
{
final Set<T> result = new HashSet<T>();
result.addAll( s1 );
result.addAll( s2 );
return result;
}
/**
Create a new Set consisting of the contents of three sets.
*/
public static <T> Set<T>
newSet(
final Set<? extends T> s1,
final Set<? extends T> s2,
final Set<? extends T> s3 )
{
return newSet( newSet( s1, s2 ), s3 );
}
/**
Create a new Set consisting of the contents of four sets.
*/
public static <T> Set<T>
newSet(
final Set<? extends T> s1,
final Set<? extends T> s2,
final Set<? extends T> s3,
final Set<? extends T> s4 )
{
return newSet( newSet( s1, s2 ), newSet( s3, s4) );
}
public static Set<String>
newUnmodifiableSet( final String[] objects )
{
return GSetUtil.newUnmodifiableStringSet( objects );
}
/**
Create a new Set containing all array elements.
*/
public static <T> Set<T>
newSet( final T... objects )
{
return( newSet( objects, 0, objects.length ) );
}
/**
Create a new Set containing all array elements.
*/
public static <T> Set<T>
newSet(
final T [] objects,
final int startIndex,
final int numItems )
{
final Set<T> set = new HashSet<T>();
for( int i = 0; i < numItems; ++i )
{
set.add( objects[ startIndex + i ] );
}
return( set );
}
/**
Return a new Set of all items in both set1 and set2.
*/
public static <T> Set<T>
intersectSets(
final Set<T> set1,
final Set<T> set2 )
{
final Set<T> result = SetUtil.newSet( set1 );
result.retainAll( set2 );
return( result );
}
/**
Return a new Set of all items in set1 not in set2.
*/
public static <T> Set<T>
removeSet(
final Set<T> set1,
final Set<T> set2 )
{
final Set<T> result = SetUtil.newSet( set1 );
result.removeAll( set2 );
return( result );
}
/**
Return a new Set of all items not common to both sets.
*/
public static <T> Set<T>
newNotCommonSet(
final Set<T> set1,
final Set<T> set2 )
{
final Set<T> result = SetUtil.newSet( set1, set2 );
final Set<T> common = intersectSets( set1, set2);
result.removeAll( common );
return( result );
}
}
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