123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197 |
- /*
- @VaadinApache2LicenseForJavaFiles@
- */
-
- package com.vaadin.terminal.gwt.widgetsetutils;
-
- import java.io.PrintWriter;
- import java.util.ArrayList;
- import java.util.Date;
- import java.util.List;
-
- import com.google.gwt.core.ext.Generator;
- import com.google.gwt.core.ext.GeneratorContext;
- import com.google.gwt.core.ext.TreeLogger;
- import com.google.gwt.core.ext.TreeLogger.Type;
- import com.google.gwt.core.ext.UnableToCompleteException;
- import com.google.gwt.core.ext.typeinfo.JClassType;
- import com.google.gwt.core.ext.typeinfo.JMethod;
- import com.google.gwt.core.ext.typeinfo.JType;
- import com.google.gwt.core.ext.typeinfo.TypeOracle;
- import com.google.gwt.user.rebind.ClassSourceFileComposerFactory;
- import com.google.gwt.user.rebind.SourceWriter;
- import com.vaadin.terminal.gwt.client.ServerConnector;
- import com.vaadin.terminal.gwt.client.ConnectorMap;
- import com.vaadin.terminal.gwt.client.communication.ClientRpc;
- import com.vaadin.terminal.gwt.client.communication.MethodInvocation;
- import com.vaadin.terminal.gwt.client.communication.RpcManager;
-
- /**
- * GWT generator that creates an implementation for {@link RpcManager} on the
- * client side classes for executing RPC calls received from the the server.
- *
- * @since 7.0
- */
- public class RpcManagerGenerator extends Generator {
-
- @Override
- public String generate(TreeLogger logger, GeneratorContext context,
- String typeName) throws UnableToCompleteException {
-
- String packageName = null;
- String className = null;
- try {
- TypeOracle typeOracle = context.getTypeOracle();
-
- // get classType and save instance variables
- JClassType classType = typeOracle.getType(typeName);
- packageName = classType.getPackage().getName();
- className = classType.getSimpleSourceName() + "Impl";
- // Generate class source code for SerializerMapImpl
- generateClass(logger, context, packageName, className);
- } catch (Exception e) {
- logger.log(TreeLogger.ERROR,
- "SerializerMapGenerator creation failed", e);
- }
- // return the fully qualifed name of the class generated
- return packageName + "." + className;
- }
-
- /**
- * Generate source code for RpcManagerImpl
- *
- * @param logger
- * Logger object
- * @param context
- * Generator context
- * @param packageName
- * package name for the class to generate
- * @param className
- * class name for the class to generate
- */
- private void generateClass(TreeLogger logger, GeneratorContext context,
- String packageName, String className) {
- // get print writer that receives the source code
- PrintWriter printWriter = null;
- printWriter = context.tryCreate(logger, packageName, className);
- // print writer if null, source code has ALREADY been generated
- if (printWriter == null) {
- return;
- }
- logger.log(Type.INFO,
- "Detecting server to client RPC interface types...");
- Date date = new Date();
- TypeOracle typeOracle = context.getTypeOracle();
- JClassType serverToClientRpcType = typeOracle.findType(ClientRpc.class
- .getName());
- JClassType[] rpcInterfaceSubtypes = serverToClientRpcType.getSubtypes();
-
- // init composer, set class properties, create source writer
- ClassSourceFileComposerFactory composer = null;
- composer = new ClassSourceFileComposerFactory(packageName, className);
- composer.addImport("com.google.gwt.core.client.GWT");
- composer.addImplementedInterface(RpcManager.class.getName());
- SourceWriter sourceWriter = composer.createSourceWriter(context,
- printWriter);
- sourceWriter.indent();
-
- List<JClassType> rpcInterfaces = new ArrayList<JClassType>();
-
- // iterate over RPC interfaces and create helper methods for each
- // interface
- for (JClassType type : rpcInterfaceSubtypes) {
- if (null == type.isInterface()) {
- // only interested in interfaces here, not implementations
- continue;
- }
- rpcInterfaces.add(type);
- // generate method to call methods of an RPC interface
- sourceWriter.println("private void " + getInvokeMethodName(type)
- + "(" + MethodInvocation.class.getName() + " invocation, "
- + ConnectorMap.class.getName() + " connectorMap) {");
- sourceWriter.indent();
-
- // loop over the methods of the interface and its superinterfaces
- // methods
- for (JClassType currentType : type.getFlattenedSupertypeHierarchy()) {
- for (JMethod method : currentType.getMethods()) {
- sourceWriter.println("if (\"" + method.getName()
- + "\".equals(invocation.getMethodName())) {");
- sourceWriter.indent();
- // construct parameter string with appropriate casts
- String paramString = "";
- JType[] parameterTypes = method.getParameterTypes();
- for (int i = 0; i < parameterTypes.length; ++i) {
- paramString = paramString + "("
- + parameterTypes[i].getQualifiedSourceName()
- + ") invocation.getParameters()[" + i + "]";
- if (i < parameterTypes.length - 1) {
- paramString = paramString + ", ";
- }
- }
- sourceWriter
- .println(ServerConnector.class.getName()
- + " connector = connectorMap.getConnector(invocation.getConnectorId());");
- sourceWriter
- .println("for ("
- + ClientRpc.class.getName()
- + " rpcImplementation : connector.getRpcImplementations(\""
- + type.getQualifiedSourceName() + "\")) {");
- sourceWriter.indent();
- sourceWriter.println("((" + type.getQualifiedSourceName()
- + ") rpcImplementation)." + method.getName() + "("
- + paramString + ");");
- sourceWriter.outdent();
- sourceWriter.println("}");
- sourceWriter.println("return;");
- sourceWriter.outdent();
- sourceWriter.println("}");
- }
- }
-
- sourceWriter.outdent();
- sourceWriter.println("}");
-
- logger.log(Type.DEBUG,
- "Constructed helper method for server to client RPC for "
- + type.getName());
- }
-
- // generate top-level "switch-case" method to select the correct
- // previously generated method based on the RPC interface
- sourceWriter.println("public void applyInvocation("
- + MethodInvocation.class.getName() + " invocation, "
- + ConnectorMap.class.getName() + " connectorMap) {");
- sourceWriter.indent();
-
- for (JClassType type : rpcInterfaces) {
- sourceWriter.println("if (\"" + type.getQualifiedSourceName()
- + "\".equals(invocation.getInterfaceName())) {");
- sourceWriter.indent();
- sourceWriter.println(getInvokeMethodName(type)
- + "(invocation, connectorMap);");
- sourceWriter.println("return;");
- sourceWriter.outdent();
- sourceWriter.println("}");
-
- logger.log(Type.INFO,
- "Configured server to client RPC for " + type.getName());
- }
- sourceWriter.outdent();
- sourceWriter.println("}");
-
- // close generated class
- sourceWriter.outdent();
- sourceWriter.println("}");
- // commit generated class
- context.commit(logger, printWriter);
- logger.log(Type.INFO,
- "Done. (" + (new Date().getTime() - date.getTime()) / 1000
- + "seconds)");
-
- }
-
- private String getInvokeMethodName(JClassType type) {
- return "invoke" + type.getQualifiedSourceName().replaceAll("\\.", "_");
- }
- }
|