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package org.litesoft.core.typeutils;
import java.util.*;
@SuppressWarnings("Convert2Diamond")
public class Maps
{
public static <K, V> Map<K, V> newHashMap()
{
return new HashMap<K, V>();
}
public static <K, V> Map<K, V> empty()
{
return Collections.emptyMap();
}
public static <K, V> Map<K, V> copyHashMap( Map<K, V> pSource )
{
if ( pSource == null || pSource.isEmpty() )
{
return empty();
}
Map<K, V> rv = newHashMap();
rv.putAll( pSource );
return rv;
}
public static <K, V> Map<K, V> deNull( Map<K, V> pToCheck )
{
if ( pToCheck == null )
{
pToCheck = empty();
}
return pToCheck;
}
public static String[] stringMapToStringArray( Map<String, String> pMap )
{
if ( pMap == null || pMap.isEmpty() )
{
return Strings.EMPTY_ARRAY;
}
String[] rv = new String[pMap.size() * 2];
int i = 0;
for ( Map.Entry<String, String> zEntry : pMap.entrySet() )
{
rv[i++] = zEntry.getKey();
rv[i++] = zEntry.getValue();
}
return rv;
}
public static Map<String, String> createHashMap( String... pKeyValuePairs )
throws IllegalArgumentException
{
Map<String, String> zMap = newHashMap();
return populate( zMap, pKeyValuePairs );
}
public static Map<String, String> populate( Map<String, String> pToPopulate, String... pNameValuePairs )
throws IllegalArgumentException
{
if ( pNameValuePairs != null )
{
if ( (pNameValuePairs.length & 1) == 1 )
{
throw new IllegalArgumentException( "NameValuePairs not paired" );
}
for ( int i = 0; i < pNameValuePairs.length; )
{
String name = pNameValuePairs[i++];
String value = pNameValuePairs[i++];
// noinspection unchecked
pToPopulate.put( name, value );
}
}
return pToPopulate;
}
public static void populate( Map pToPopulate, Map pNewContents )
{
if ( pNewContents != null )
{
//noinspection unchecked
pToPopulate.putAll( pNewContents );
}
}
public static String[] getSortedKeysAsStrings( Map pMap )
{
String[] names = Strings.toArray( pMap.keySet().toArray() );
Arrays.sort( names );
return names;
}
public static Map<String, String> addPropertiesTo( Map<String, String> pMap, String... pProperty_NameValues )
throws IllegalArgumentException
{
if ( Objects.isNotNullOrEmpty( pProperty_NameValues ) )
{
if ( (pProperty_NameValues.length & 1) != 0 )
{
throw new IllegalArgumentException( "Attempt to add Properties that were NOT Name/Value pairs" );
}
for ( int i = 0; i < pProperty_NameValues.length; i += 2 )
{
pMap.put( pProperty_NameValues[i], pProperty_NameValues[i + 1] );
}
}
return pMap;
}
}
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