/*
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package com.sun.appserv.management.util.misc;
import java.util.Set;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.HashMap;
import java.util.Properties;
import com.sun.appserv.management.util.stringifier.SmartStringifier;
public final class MapUtil
{
private
MapUtil( )
{
// disallow instantiation
}
public static <K,V> V
getWithDefault( final Map<K,V> m, final K key, V defaultValue )
{
return m.containsKey( key ) ? m.get( key ) : defaultValue;
}
public static Object[]
getKeyObjects( final Map<?,?> m)
{
return( SetUtil.toArray( m.keySet() ) );
}
public static String[]
getKeyStrings( final Map<?,?> m)
{
return( GSetUtil.toSortedStringArray( m.keySet() ) );
}
/**
Create a new Map consisting of a single key/value pair.
*/
public static <V> Map<String,V>
newMap(
final String key,
final V value )
{
final Map<String,V> m = new HashMap<String,V>();
m.put( key, value );
return( m );
}
/**
Create a new Map consisting of a single key/value pair.
*/
public static <K,V> Map<K,V>
newMap(
final Map<K,V> m1,
final Map<K,V> m2 )
{
final Map<K,V> m = new HashMap<K,V>();
if ( m1 != null )
{
m.putAll( m1 );
}
if ( m2 != null )
{
m.putAll( m2 );
}
return( m );
}
/**
Create a new Map and insert the specified mappings as found in 'mappings'.
The even-numbered entries are the keys, and the odd-numbered entries are
the values.
*/
public static <T> Map<T,T>
newMap( final T[] mappings )
{
if ( (mappings.length % 2) != 0 )
{
throw new IllegalArgumentException( "mappings must have even length" );
}
final Map<T,T> m = new HashMap<T,T>();
for( int i = 0; i < mappings.length; i += 2 )
{
m.put( mappings[ i ], mappings[ i + 1 ] );
}
return( m );
}
/**
Create a new Map and insert the specified mappings as found in 'mappings'.
The even-numbered entries are the keys, and the odd-numbered entries are
the values.
*/
public static Map<String,String>
newMap( final String[] mappings )
{
if ( (mappings.length % 2) != 0 )
{
throw new IllegalArgumentException( "mappings must have even length" );
}
final Map<String,String> m = new HashMap<String,String>();
for( int i = 0; i < mappings.length; i += 2 )
{
m.put( mappings[ i ], mappings[ i + 1 ] );
}
return( m );
}
/**
Remove all entries keyed by 'keys'
*/
public static <T> void
removeAll(
final Map<T,?> m,
final T[] keys )
{
for( int i = 0; i < keys.length; ++i )
{
m.remove( keys[ i ] );
}
}
public static boolean
mapsEqual(
final Map<?,?> m1,
final Map<?,?> m2 )
{
if ( m1 == m2 )
{
return( true );
}
boolean equal = false;
if ( m1.size() == m2.size() &&
m1.keySet().equals( m2.keySet() ) )
{
equal = true;
for( final Object key : m1.keySet() )
{
final Object value1 = m1.get( key );
final Object value2 = m2.get( key );
if ( ! CompareUtil.objectsEqual( value1, value2 ) )
{
equal = false;
break;
}
}
}
return( equal );
}
public static <K,V> Map<K,V>
newMapNoNullValues( final Map<K,V> m )
{
final Map<K,V> result = new HashMap<K,V>();
for ( final K key : m.keySet() )
{
final V value = m.get( key );
if ( value != null )
{
result.put( key, value );
}
}
return( result );
}
public static String
toString( final Map<?,?> m )
{
return( toString( m, "," ) );
}
public static String
toString( final Map<?,?> m, final String separator )
{
if ( m == null )
{
return( "null" );
}
final StringBuffer buf = new StringBuffer();
final String[] keyStrings = getKeyStrings( m );
for( final String key : keyStrings )
{
final Object value = m.get( key );
buf.append( key );
buf.append( "=" );
buf.append( SmartStringifier.toString( value ) );
buf.append( separator );
}
if ( buf.length() != 0 )
{
// strip trailing separator
buf.setLength( buf.length() - separator.length() );
}
return( buf.toString() );
}
public static <K> Set<K>
getNullValueKeys( final Map<K,?> m)
{
final Set<K> s = new HashSet<K>();
for( final K key : m.keySet() )
{
if ( m.get( key ) == null )
{
s.add( key );
}
}
return( s );
}
public static <K,V> Map<K,V>
toMap( final Properties props, final Class<K> kClass, final Class<V> vClass)
{
return TypeCast.checkMap( props, kClass, vClass );
}
public static <K> void
removeAll( final Map<K,?> m, final Set<K> s )
{
for( final K key : s )
{
m.remove( key );
}
}
/**
@return true if non-null Map and all keys and values are of type java.lang.String
*/
public static boolean
isAllStrings( final Map<?,?> m )
{
return m != null && CollectionUtil.isAllStrings( m.keySet() ) &&
CollectionUtil.isAllStrings( m.values() );
}
/**
Convert an arbitrary Map to one whose keys and values
are both of type String.
*/
public static Map<String,String>
toStringStringMap( final Map<?,?> m )
{
if ( m == null )
{
return null;
}
Map<String,String> result = null;
if ( isAllStrings( m ) )
{
result = TypeCast.asMap( m );
}
else
{
result = new HashMap<String,String>();
for( final Object key : m.keySet() )
{
final Object value = m.get( key );
if ( (key instanceof String) && (value instanceof String) )
{
result.put( (String)key, (String)value );
}
else
{
result.put( "" + key, "" + value );
}
}
}
return result;
}
}
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