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

import org.litesoft.core.annotations.*;
import org.litesoft.core.util.*;

/**
 * Convert String value to/from a self-terminating string representation
 */
public class StringCodec extends AbstractCodec<String>
{
    public static final StringCodec INSTANCE = new StringCodec();

    @Override
    protected @NotNull String encodeNonNull( String pValue )
    {
        return IntegerCodec.NonNegativePrimitive.INSTANCE.encode( pValue.length() ) + pValue;
    }

    @Override
    protected @NotNull String decodeNonNull( CharSource pCharSource )
    {
        int zLength = IntegerCodec.NonNegativePrimitive.INSTANCE.decode( pCharSource );
        if ( zLength == 0 )
        {
            return "";
        }
        StringBuilder zSB = new StringBuilder( zLength );
        while ( zLength-- > 0 )
        {
            zSB.append( pCharSource.getRequired() );
        }
        return zSB.toString();
    }
}