org.zodiac.netty.http.headers.CharsetHeader Maven / Gradle / Ivy

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package org.zodiac.netty.http.headers;

import java.nio.charset.Charset;
import java.util.Objects;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.zodiac.sdk.toolkit.constants.CharsetConstants;

final class CharsetHeader extends AbstractHeader {

    private Logger log = LoggerFactory.getLogger(getClass());

    CharsetHeader(CharSequence name) {
        super(Charset.class, name);
    }

    @Override
    public String toString(Charset value) {
        return value.name().toLowerCase();
    }

    @Override
    public Charset toValue(CharSequence value) {
        try {
            return Charset.forName(Objects.requireNonNull(value, "value").toString());
        } catch (Exception ex) {
            log.warn(String.format("invalid charset header '%s' for %s", value, name()), ex);
            return CharsetConstants.UTF_8;
        }
    }
}