// This Source Code is in the Public Domain per: http://litesoft.org/License.txt
package org.litesoft.codec;

import org.litesoft.commonfoundation.charstreams.*;
import org.litesoft.commonfoundation.annotations.*;

/**
 * Convert a Non Null String value to/from a self-terminating string representation
 */
public class NonNullStringTerminatingCodec
{
    public static final NonNullStringTerminatingCodec INSTANCE = new NonNullStringTerminatingCodec();

    public @NotNull void encode( CharSink pCharSink, String pValue )
    {
        PrimitiveIntegerCodec.NON_NEGATIVE.encode( pCharSink, pValue.length() );
        for ( int i = 0; i < pValue.length(); i++ )
        {
            pCharSink.add( pValue.charAt( i ) );
        }
    }

    public @NotNull String decode( CharSource pCharSource )
    {
        int zLength = PrimitiveIntegerCodec.NON_NEGATIVE.decode( pCharSource );
        if ( zLength == 0 )
        {
            return "";
        }
        StringBuilder zSB = new StringBuilder( zLength );
        while ( zLength-- > 0 )
        {
            zSB.append( pCharSource.getRequired() );
        }
        return zSB.toString();
    }
}