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package org.glassfish.jersey.message.internal;

import java.text.ParseException;

/**
 * An acceptable language tag.
 *
 * @author Paul Sandoz
 * @author Marek Potociar (marek.potociar at oracle.com)
 */
public class AcceptableLanguageTag extends LanguageTag implements Qualified {

    private final int quality;

    public AcceptableLanguageTag(String primaryTag, String subTags) {
        super(primaryTag, subTags);
        this.quality = Quality.DEFAULT;
    }

    public AcceptableLanguageTag(String header) throws ParseException {
        this(HttpHeaderReader.newInstance(header));
    }

    public AcceptableLanguageTag(HttpHeaderReader reader) throws ParseException {
        // Skip any white space
        reader.hasNext();

        tag = reader.nextToken().toString();
        if (!tag.equals("*")) {
            parse(tag);
        } else {
            primaryTag = tag;
        }

        if (reader.hasNext()) {
            quality = HttpHeaderReader.readQualityFactorParameter(reader);
        } else {
            quality = Quality.DEFAULT;
        }
    }

    @Override
    public int getQuality() {
        return quality;
    }

    @Override
    public boolean equals(Object obj) {
        if (!super.equals(obj)) {
            return false;
        }
        final AcceptableLanguageTag other = (AcceptableLanguageTag) obj;
        return this.quality == other.quality;
    }

    @Override
    public int hashCode() {
        int hash = super.hashCode();
        hash = 47 * hash + this.quality;
        return hash;
    }
}
