Examples of com.sleepycat.persist.model.PersistentProxy

com.sleepycat.persist.model.PersistentProxy
ALLOWED String text; }
A proxy for proxied class P does not handle instances of subclasses of P. To proxy a subclass of P, a separate proxy class is needed.

Several {@link built in proxy types}are used implicitly. An application defined proxy will be used instead of a built-in proxy, if both exist for the same proxied class.

With respect to class evolution, a proxy instance is no different than any other persistent instance. When using a {@link RawStore} or {@link Converter}, only the raw data of the proxy instance will be visible. Raw data for the proxied instance never exists.

Currently a proxied object may not contain a reference to itself. For simple proxied objects such as the Locale class shown above, this naturally won't occur. But for proxied objects that are containers -- the built-in Collection and Map classes for example -- this can occur if the container is added as an element of itself. This should be avoided. If an attempt to store such an object is made, an {@code IllegalArgumentException} will bethrown.

Note that a proxy class may not be a subclass of an entity class.
@author Mark Hayes

        throws RefreshException {


        if (rawAccess) {
            proxyFormat.writeObject(o, output, true);
        } else {
            PersistentProxy proxy =
                (PersistentProxy) proxyFormat.newInstance(null, false);
            proxy.initializeProxy(o);
            proxyFormat.writeObject(proxy, output, false);
        }
    }

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                            boolean rawAccess,
                            RawObject rawObject,
                            IdentityHashMap converted)
        throws RefreshException {


        PersistentProxy proxy = (PersistentProxy) proxyFormat.convertRawObject
            (catalog, rawAccess, rawObject, converted);
        Object o = proxy.convertProxy();
        converted.put(rawObject, o);
        return o;
    }

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    public Object newInstance(EntityInput input, boolean rawAccess) {
        Reader reader = proxyFormat.getReader();
        if (rawAccess) {
            return reader.newInstance(null, true);
        } else {
            PersistentProxy proxy =
                (PersistentProxy) reader.newInstance(null, false);
            proxy = (PersistentProxy) reader.readObject(proxy, input, false);
            return proxy.convertProxy();
        }
    }

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    @Override
    void writeObject(Object o, EntityOutput output, boolean rawAccess) {
        if (rawAccess) {
            proxyFormat.writeObject(o, output, true);
        } else {
            PersistentProxy proxy =
                (PersistentProxy) proxyFormat.newInstance(null, false);
            proxy.initializeProxy(o);
            proxyFormat.writeObject(proxy, output, false);
        }
    }

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    @Override
    Object convertRawObject(Catalog catalog,
                            boolean rawAccess,
                            RawObject rawObject,
                            IdentityHashMap converted) {
        PersistentProxy proxy = (PersistentProxy) proxyFormat.convertRawObject
            (catalog, rawAccess, rawObject, converted);
        Object o = proxy.convertProxy();
        converted.put(rawObject, o);
        return o;
    }

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    public Object newInstance(EntityInput input, boolean rawAccess) {
        Reader reader = proxyFormat.getReader();
        if (rawAccess) {
            return reader.newInstance(null, true);
        } else {
            PersistentProxy proxy =
                (PersistentProxy) reader.newInstance(null, false);
            proxy = (PersistentProxy) reader.readObject(proxy, input, false);
            return proxy.convertProxy();
        }
    }

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    @Override
    void writeObject(Object o, EntityOutput output, boolean rawAccess) {
        if (rawAccess) {
            proxyFormat.writeObject(o, output, true);
        } else {
            PersistentProxy proxy =
                (PersistentProxy) proxyFormat.newInstance(null, false);
            proxy.initializeProxy(o);
            proxyFormat.writeObject(proxy, output, false);
        }
    }

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    @Override
    Object convertRawObject(Catalog catalog,
                            boolean rawAccess,
                            RawObject rawObject,
                            IdentityHashMap converted) {
        PersistentProxy proxy = (PersistentProxy) proxyFormat.convertRawObject
            (catalog, rawAccess, rawObject, converted);
        Object o = proxy.convertProxy();
        converted.put(rawObject, o);
        return o;
    }

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Related Classes of com.sleepycat.persist.model.PersistentProxy

com.sleepycat.persist.impl.ProxiedFormat

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