Examples of javax.xml.crypto.NoSuchMechanismException

javax.xml.crypto.NoSuchMechanismException
This exception is thrown when a particular XML mechanism is requested but is not available in the environment.
A NoSuchMechanismException can contain a cause: another throwable that caused this NoSuchMechanismException to get thrown. @author Sean Mullan @author JSR 105 Expert Group @see XMLSignatureFactory#getInstance XMLSignatureFactory.getInstance @see KeyInfoFactory#getInstance KeyInfoFactory.getInstance

        Instance instance;
        try {
            instance = GetInstance.getInstance
                ("KeyInfoFactory", null, mechanismType);
        } catch (NoSuchAlgorithmException nsae) {
            throw new NoSuchMechanismException(nsae);
        }
        KeyInfoFactory factory = (KeyInfoFactory) instance.impl;
        factory.mechanismType = mechanismType;
        factory.provider = instance.provider;
        return factory;

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        Instance instance;
        try {
            instance = GetInstance.getInstance
                ("KeyInfoFactory", null, mechanismType, provider);
        } catch (NoSuchAlgorithmException nsae) {
            throw new NoSuchMechanismException(nsae);
        }
        KeyInfoFactory factory = (KeyInfoFactory) instance.impl;
        factory.mechanismType = mechanismType;
        factory.provider = instance.provider;
        return factory;

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        Instance instance;
        try {
            instance = GetInstance.getInstance
                ("KeyInfoFactory", null, mechanismType, provider);
        } catch (NoSuchAlgorithmException nsae) {
            throw new NoSuchMechanismException(nsae);
        }
        KeyInfoFactory factory = (KeyInfoFactory) instance.impl;
        factory.mechanismType = mechanismType;
        factory.provider = instance.provider;
        return factory;

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        Instance instance;
        try {
            instance = GetInstance.getInstance
                ("XMLSignatureFactory", null, mechanismType);
        } catch (NoSuchAlgorithmException nsae) {
            throw new NoSuchMechanismException(nsae);
        }
        XMLSignatureFactory factory = (XMLSignatureFactory) instance.impl;
        factory.mechanismType = mechanismType;
        factory.provider = instance.provider;
        return factory;

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        Instance instance;
        try {
            instance = GetInstance.getInstance
                ("XMLSignatureFactory", null, mechanismType, provider);
        } catch (NoSuchAlgorithmException nsae) {
            throw new NoSuchMechanismException(nsae);
        }
        XMLSignatureFactory factory = (XMLSignatureFactory) instance.impl;
        factory.mechanismType = mechanismType;
        factory.provider = instance.provider;
        return factory;

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        Instance instance;
        try {
            instance = GetInstance.getInstance
                ("XMLSignatureFactory", null, mechanismType, provider);
        } catch (NoSuchAlgorithmException nsae) {
            throw new NoSuchMechanismException(nsae);
        }
        XMLSignatureFactory factory = (XMLSignatureFactory) instance.impl;
        factory.mechanismType = mechanismType;
        factory.provider = instance.provider;
        return factory;

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            provider = getProvider("KeyInfoFactory", mechanismType);
        }
        Provider.Service ps = provider.getService("KeyInfoFactory",
                                                  mechanismType);
        if (ps == null) {
            throw new NoSuchMechanismException("Cannot find " + mechanismType +
                                               " mechanism type");
        }
        try {
            KeyInfoFactory fac = (KeyInfoFactory)ps.newInstance(null);
            fac.mechanismType = mechanismType;
            fac.provider = provider;
            return fac;
        } catch (NoSuchAlgorithmException nsae) {
            throw new NoSuchMechanismException("Cannot find " + mechanismType +
                                               " mechanism type", nsae);
        }
    }

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    }


    private static Provider getProvider(String engine, String mech) {
        Provider[] providers = Security.getProviders(engine + "." + mech);
        if (providers == null) {
            throw new NoSuchMechanismException("Mechanism type " + mech +
                                               " not available");
        }
        return providers[0];
    }

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            provider = getProvider("XMLSignatureFactory", mechanismType);
        }
        Provider.Service ps = provider.getService("XMLSignatureFactory",
                                                  mechanismType);
        if (ps == null) {
            throw new NoSuchMechanismException("Cannot find " + mechanismType +
                                               " mechanism type");
        }
        try {
            XMLSignatureFactory fac = (XMLSignatureFactory)ps.newInstance(null);
            fac.mechanismType = mechanismType;
            fac.provider = provider;
            return fac;
        } catch (NoSuchAlgorithmException nsae) {
            throw new NoSuchMechanismException("Cannot find " + mechanismType +
                                               " mechanism type", nsae);
        }
    }

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    }


    private static Provider getProvider(String engine, String mech) {
        Provider[] providers = Security.getProviders(engine + "." + mech);
        if (providers == null) {
            throw new NoSuchMechanismException("Mechanism type " + mech +
                                               " not available");
        }
        return providers[0];
    }

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