eu.bitwalker.useragentutils.version.fetcher.VersionFetcherFromMap Maven / Gradle / Ivy

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Utility classes to handle user-agents.

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package eu.bitwalker.useragentutils.version.fetcher;

import eu.bitwalker.useragentutils.Version;

import java.util.Collections;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Sometimes version of something is not written clearly in User-Agent string.
 * However it is possible to extract version of other component that can be
 * mapped to needed version. Concrete example is discovery of version of Safari
 * browser by version of Webkit.
 *
 * @author alexr
 */
public class VersionFetcherFromMap extends PatternBasedVersionFetcher {
    private final Map versions;

    public VersionFetcherFromMap(Pattern pattern, Map versions) {
        super(pattern);
        this.versions = Collections.unmodifiableMap(versions);
    }

    protected Version createVersion(Matcher matcher) {
        return versions.get(matcher.group(1));
    }
}