List of usage examples for com.google.gwt.user.server.rpc.impl ServerSerializationStreamReaderCopy_GWT16 getSerializationPolicy
public SerializationPolicy getSerializationPolicy()
From source file:us.gibb.dev.gwt.server.remote.RPCAppengine.java
License:Apache License
/** * Returns an {@link RPCRequest} that is built by decoding the contents of an * encoded RPC request and optionally validating that type can handle the * request. If the type parameter is not <code>null</code>, the * implementation checks that the type is assignable to the * {@link RemoteService} interface requested in the encoded request string. * /*ww w .j a v a 2 s. com*/ * <p> * If the serializationPolicyProvider parameter is not <code>null</code>, * it is asked for a {@link SerializationPolicy} to use to restrict the set of * types that can be decoded from the request. If this parameter is * <code>null</code>, then only subtypes of * {@link com.google.gwt.user.client.rpc.IsSerializable IsSerializable} or * types which have custom field serializers can be decoded. * </p> * * <p> * Invoking this method with <code>null</code> for the type parameter, * <code>decodeRequest(encodedRequest, null)</code>, is equivalent to * calling <code>decodeRequest(encodedRequest)</code>. * </p> * * @param encodedRequest a string that encodes the {@link RemoteService} * interface, the service method, and the arguments to pass to the * service method * @param type if not <code>null</code>, the implementation checks that the * type is assignable to the {@link RemoteService} interface encoded * in the encoded request string. * @param serializationPolicyProvider if not <code>null</code>, the * implementation asks this provider for a * {@link SerializationPolicy} which will be used to restrict the set * of types that can be decoded from this request * @return an {@link RPCRequest} instance * * @throws NullPointerException if the encodedRequest is <code>null</code> * @throws IllegalArgumentException if the encodedRequest is an empty string * @throws IncompatibleRemoteServiceException if any of the following * conditions apply: * <ul> * <li>if the types in the encoded request cannot be deserialized</li> * <li>if the {@link ClassLoader} acquired from * <code>Thread.currentThread().getContextClassLoader()</code> * cannot load the service interface or any of the types specified * in the encodedRequest</li> * <li>the requested interface is not assignable to * {@link RemoteService}</li> * <li>the service method requested in the encodedRequest is not a * member of the requested service interface</li> * <li>the type parameter is not <code>null</code> and is not * assignable to the requested {@link RemoteService} interface * </ul> */ public static RPCRequest decodeRequest(String encodedRequest, Class<?> type, SerializationPolicyProvider serializationPolicyProvider) { if (encodedRequest == null) { throw new NullPointerException("encodedRequest cannot be null"); } if (encodedRequest.length() == 0) { throw new IllegalArgumentException("encodedRequest cannot be empty"); } ClassLoader classLoader = Thread.currentThread().getContextClassLoader(); try { ServerSerializationStreamReaderCopy_GWT16 streamReader = new ServerSerializationStreamReaderCopy_GWT16( classLoader, serializationPolicyProvider); streamReader.prepareToRead(encodedRequest); // Read the name of the RemoteService interface String serviceIntfName = streamReader.readString(); if (type != null) { if (!implementsInterface(type, serviceIntfName)) { // The service does not implement the requested interface throw new IncompatibleRemoteServiceException("Blocked attempt to access interface '" + serviceIntfName + "', which is not implemented by '" + printTypeName(type) + "'; this is either misconfiguration or a hack attempt"); } } SerializationPolicy serializationPolicy = streamReader.getSerializationPolicy(); Class<?> serviceIntf; try { serviceIntf = getClassFromSerializedName(serviceIntfName, classLoader); if (!RemoteService.class.isAssignableFrom(serviceIntf)) { // The requested interface is not a RemoteService interface throw new IncompatibleRemoteServiceException("Blocked attempt to access interface '" + printTypeName(serviceIntf) + "', which doesn't extend RemoteService; this is either misconfiguration or a hack attempt"); } } catch (ClassNotFoundException e) { throw new IncompatibleRemoteServiceException( "Could not locate requested interface '" + serviceIntfName + "' in default classloader", e); } String serviceMethodName = streamReader.readString(); int paramCount = streamReader.readInt(); Class<?>[] parameterTypes = new Class[paramCount]; for (int i = 0; i < parameterTypes.length; i++) { String paramClassName = streamReader.readString(); try { parameterTypes[i] = getClassFromSerializedName(paramClassName, classLoader); } catch (ClassNotFoundException e) { throw new IncompatibleRemoteServiceException( "Parameter " + i + " of is of an unknown type '" + paramClassName + "'", e); } } try { Method method = serviceIntf.getMethod(serviceMethodName, parameterTypes); Object[] parameterValues = new Object[parameterTypes.length]; for (int i = 0; i < parameterValues.length; i++) { parameterValues[i] = streamReader.deserializeValue(parameterTypes[i]); } return new RPCRequest(method, parameterValues, serializationPolicy, 0); } catch (NoSuchMethodException e) { throw new IncompatibleRemoteServiceException( formatMethodNotFoundErrorMessage(serviceIntf, serviceMethodName, parameterTypes)); } } catch (SerializationException ex) { throw new IncompatibleRemoteServiceException(ex.getMessage(), ex); } }