Java 类javax.imageio.spi.IIOServiceProvider 实例源码

private void testSpi(IIOServiceProvider spi) {
    if (spi.getVendorName() == null) {
        error(spi + " getVendorName == null!");
    }
    if (spi.getVersion() == null) {
        error(spi + " getVersion == null!");
    }
}

private void testSpi(ImageReaderWriterSpi spi) {
    testSpi((IIOServiceProvider)spi);
    if (spi.getFormatNames() == null) {
        error("spi.getFormatNames == null!");
    }
    String[] suffixes = spi.getFileSuffixes();
    if (suffixes != null && suffixes.length == 0) {
        error("suffixes.length == 0!");
    }
    String[] MIMETypes = spi.getMIMETypes();
    if (MIMETypes != null && MIMETypes.length == 0) {
        error("MIMETypes.length == 0!");
    }
    if (spi.getPluginClassName() == null) {
        error("spi.getPluginClassName == null!");
    }
    String[] extraStreamMetadataFormatNames =
        spi.getExtraStreamMetadataFormatNames();
    if (extraStreamMetadataFormatNames != null &&
        extraStreamMetadataFormatNames.length == 0) {
        error("extraStreamMetadataFormatNames.length == 0!");
    }
    String[] extraImageMetadataFormatNames =
        spi.getExtraImageMetadataFormatNames();
    if (extraImageMetadataFormatNames != null &&
        extraImageMetadataFormatNames.length == 0) {
        error("extraImageMetadataFormatNames.length == 0!");
    }
}

private static void check(IIOServiceProvider spi) {
    String version = spi.getVersion();
    if (!version.equals("1.0")) {
        throw new RuntimeException("Provider " +
                                   spi.getClass().getName() +
                                   " has version " + version + "!");
    }
}

protected void clearImageIORegistry() {
    IIORegistry registry = IIORegistry.getDefaultInstance();
    Iterator<Class<?>> categories = registry.getCategories();
    final ClassLoader webClassLoader = getWebApplicationClassLoader();
    ServiceRegistry.Filter classLoaderFilter = provider -> {
        //remove all service provider loaded by the current ClassLoader
        return webClassLoader.equals(provider.getClass().getClassLoader());
    };
    while (categories.hasNext()) {
        @SuppressWarnings("unchecked")
        Class<IIOServiceProvider> category = (Class<IIOServiceProvider>) categories.next();
        Iterator<IIOServiceProvider> serviceProviders = registry.getServiceProviders(category,
            classLoaderFilter, true);
        if (serviceProviders.hasNext()) {
            info("removing service provider of category: " + category.getSimpleName());
            //copy to list
            LinkedList<IIOServiceProvider> serviceProviderList = new LinkedList<>();
            while (serviceProviders.hasNext()) {
                serviceProviderList.add(serviceProviders.next());
            }
            for (IIOServiceProvider serviceProvider : serviceProviderList) {
                info(" - removing: " + serviceProvider.getDescription(Locale.ROOT));
                registry.deregisterServiceProvider(serviceProvider);
            }
        }
    }
}

private void testSpi(IIOServiceProvider spi) {
    if (spi.getVendorName() == null) {
        error(spi + " getVendorName == null!");
    }
    if (spi.getVersion() == null) {
        error(spi + " getVersion == null!");
    }
}

private void testSpi(ImageReaderWriterSpi spi) {
    testSpi((IIOServiceProvider)spi);
    if (spi.getFormatNames() == null) {
        error("spi.getFormatNames == null!");
    }
    String[] suffixes = spi.getFileSuffixes();
    if (suffixes != null && suffixes.length == 0) {
        error("suffixes.length == 0!");
    }
    String[] MIMETypes = spi.getMIMETypes();
    if (MIMETypes != null && MIMETypes.length == 0) {
        error("MIMETypes.length == 0!");
    }
    if (spi.getPluginClassName() == null) {
        error("spi.getPluginClassName == null!");
    }
    String[] extraStreamMetadataFormatNames =
        spi.getExtraStreamMetadataFormatNames();
    if (extraStreamMetadataFormatNames != null &&
        extraStreamMetadataFormatNames.length == 0) {
        error("extraStreamMetadataFormatNames.length == 0!");
    }
    String[] extraImageMetadataFormatNames =
        spi.getExtraImageMetadataFormatNames();
    if (extraImageMetadataFormatNames != null &&
        extraImageMetadataFormatNames.length == 0) {
        error("extraImageMetadataFormatNames.length == 0!");
    }
}

private static void check(IIOServiceProvider spi) {
    String version = spi.getVersion();
    if (!version.equals("1.0")) {
        throw new RuntimeException("Provider " +
                                   spi.getClass().getName() +
                                   " has version " + version + "!");
    }
}