// This Source Code is in the Public Domain per: http://litesoft.org/License.txt
package org.litesoft.GWT.forms.server.support.nonpublic;

import org.litesoft.commonfoundation.typeutils.Objects;
import java.util.*;

import org.litesoft.core.simpletypes.*;
import java.io.*;

public abstract class AbstractSendableKeyValuePairConverter extends AbstractSendableDataConverter
{
    protected Serializable convertNotNullToPassable( Object pValue )
    {
        return createSimpleKeyValuePair( pValue );
    }

    protected Object convertNotNullNotBoxedTypeFromPassable( Serializable pValue )
    {
        return (pValue instanceof SimpleKeyValuePair) ? //
               convertSimpleKeyValuePairKey( ((SimpleKeyValuePair) pValue).getKey() ) : //
               pValue.toString();
    }

    protected Object convertSimpleKeyValuePairKey( Object pKey )
    {
        return pKey;
    }

    abstract protected SimpleKeyValuePair createSimpleKeyValuePair( Object pOption );

    public SimpleKeyValuePair[] createValidOptions( Object[] pValidOptions,
                                                    String[] pAltOrLimitingValidOptions )
    {
        if ( Objects.isNullOrEmpty( pValidOptions ) )
        {
            if ( Objects.isNullOrEmpty( pValidOptions = pAltOrLimitingValidOptions ) )
            {
                return SimpleKeyValuePair.EMPTY_ARRAY;
            }
        }
        if ( (pValidOptions == pAltOrLimitingValidOptions) || (pAltOrLimitingValidOptions == null) )
        {
            SimpleKeyValuePair[] rv = new SimpleKeyValuePair[pValidOptions.length];
            for ( int i = 0; i < pValidOptions.length; i++ )
            {
                rv[i] = createSimpleKeyValuePair( pValidOptions[i] );
            }
            return rv;
        }
        Set<String> zLimitTo = new HashSet<String>();
        for ( String option : pAltOrLimitingValidOptions )
        {
            zLimitTo.add( createSimpleKeyValuePair( option ).toStringValue() );
        }
        List<SimpleKeyValuePair> rv = new ArrayList<SimpleKeyValuePair>();
        for ( Object option : pValidOptions )
        {
            SimpleKeyValuePair possibleEntry = createSimpleKeyValuePair( option );
            if ( zLimitTo.contains( possibleEntry.toStringValue() ) )
            {
                rv.add( possibleEntry );
            }
        }
        return rv.toArray( new SimpleKeyValuePair[rv.size()] );
    }
}