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

import org.litesoft.charstreams.*;
import org.litesoft.core.annotations.*;
import org.litesoft.core.typeutils.*;
import org.litesoft.memobeansupport.*;

/**
 * Convert Memoable value to/from a self-terminating string representation
 */
public class MemoableTypedTerminatingCodec<T extends Memoable<T>> extends AbstractTypedTerminatingCodec<T>
{
    private T mDefaultInstance;

    public MemoableTypedTerminatingCodec( T pDefaultInstance )
    {
        Objects.assertNotNull( "DefaultInstance", mDefaultInstance = pDefaultInstance );
    }

    @Override
    protected @NotNull void encodeNonNull( CharSink pCharSink, T pValue )
    {
        pCharSink.add( NOT_NULL_FOLLOWS_AS_CHAR ); // This is needed as the first subfield of the Value could be a null and that would confuse the Null checker
        pValue.toMemo( pCharSink );
    }

    @Override
    protected @NotNull T decodeNonNull( CharSource pCharSource )
    {
        if ( NOT_NULL_FOLLOWS_AS_CHAR != pCharSource.getRequired() ) // This is needed as the first subfield of the Value could be a null and that would confuse the Null checker
        {
            throw new IllegalArgumentException( "Malformed Memoable protocol" );
        }
        return mDefaultInstance.fromMemo( pCharSource );
    }
}