Stop swallowing compile errors ApplicationControllerGenerator!

gwtp-core/gwtp-mvp-client/src/main/java/com/gwtplatform/mvp/client/fallback/ApplicationControllerFallback.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2015 ArcBees Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.gwtplatform.mvp.client.fallback;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.core.client.Scheduler;
+import com.google.gwt.user.client.ui.HTML;
+import com.google.gwt.user.client.ui.RootPanel;
+import com.gwtplatform.mvp.client.ApplicationController;
+
+public class ApplicationControllerFallback implements ApplicationController {
+
+    public static final String REASON = "There must have been an issue generating " +
+            "the ApplicationController. Please check your module configuration, ensure there " +
+            "are no compile errors in your source code and ensure you are not importing sources " +
+            "that cannot be compiled by GWT.";
+
+    @Override
+    public void init() {
+        GWT.log(REASON);
+
+        Scheduler.get().scheduleDeferred(new Scheduler.ScheduledCommand() {
+            @Override
+            public void execute() {
+                RootPanel.get().add(new HTML("<h3>" + REASON + "</h3>"));
+            }
+        });
+    }
+
+    @Override
+    public void onModuleLoad() {
+        init();
+    }
+}

gwtp-core/gwtp-mvp-client/src/main/java/com/gwtplatform/mvp/client/fallback/BootstrapperFallback.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2015 ArcBees Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.gwtplatform.mvp.client.fallback;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.core.client.Scheduler;
+import com.google.gwt.user.client.ui.HTML;
+import com.google.gwt.user.client.ui.RootPanel;
+import com.gwtplatform.mvp.client.Bootstrapper;
+
+public class BootstrapperFallback implements Bootstrapper {
+
+    private static final String REASON = "There must have been an issue generating the Bootstrapper. " +
+            "Please check your module configuration, ensure there are no compile errors in your source code " +
+            "and ensure you are not importing sources that cannot be compiled by GWT.";
+
+    @Override
+    public void onBootstrap() {
+        GWT.log(REASON);
+
+        Scheduler.get().scheduleDeferred(new Scheduler.ScheduledCommand() {
+            @Override
+            public void execute() {
+                RootPanel.get().add(new HTML("<h3>" + REASON + "</h3>"));
+            }
+        });
+    }
+}

gwtp-core/gwtp-mvp-client/src/main/java/com/gwtplatform/mvp/client/fallback/PreBootstrapperFallback.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2015 ArcBees Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.gwtplatform.mvp.client.fallback;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.core.client.Scheduler;
+import com.google.gwt.user.client.ui.HTML;
+import com.google.gwt.user.client.ui.RootPanel;
+import com.gwtplatform.mvp.client.PreBootstrapper;
+
+public class PreBootstrapperFallback implements PreBootstrapper {
+
+    private static final String REASON = "There must have been an issue generating the PreBootstrapper. " +
+            "Please check your module configuration, ensure there are no compile errors in your source code " +
+            "and ensure you are not importing sources that cannot be compiled by GWT.";
+
+    @Override
+    public void onPreBootstrap() {
+        GWT.log(REASON);
+
+        Scheduler.get().scheduleDeferred(new Scheduler.ScheduledCommand() {
+            @Override
+            public void execute() {
+                RootPanel.get().add(new HTML("<h3>" + REASON + "</h3>"));
+            }
+        });
+    }
+}

gwtp-core/gwtp-mvp-client/src/main/java/com/gwtplatform/mvp/rebind/ApplicationControllerGenerator.java

@@ -31,17 +31,23 @@
 import com.gwtplatform.mvp.client.Bootstrapper;
 import com.gwtplatform.mvp.client.DelayedBindRegistry;
 import com.gwtplatform.mvp.client.PreBootstrapper;
+import com.gwtplatform.mvp.client.fallback.ApplicationControllerFallback;
+import com.gwtplatform.mvp.client.fallback.BootstrapperFallback;
+import com.gwtplatform.mvp.client.fallback.PreBootstrapperFallback;
 
 /**
  * Will generate a {@link com.gwtplatform.mvp.client.ApplicationController}. If the user wants his Generator to be
  * generated by GWTP, this Application controller will make sure that the Ginjector is used to trigger the initial
  * revealCurrentPlace() from the place manager.
  */
 public class ApplicationControllerGenerator extends AbstractGenerator {
+    private static final String PROBLEM_GENERATING = "There was a problem generating the ApplicationController," +
+            " this can be caused by bad GWT module configuration or compile errors in your source code.";
     private static final String PROPERTY_BOOTSTRAPPER_EMPTY =
             "Required configuration property 'gwtp.bootstrapper' can not be empty!.";
     private static final String PROPERTY_NOT_FOUND = "Undefined configuration property '%s'.";
-    private static final String TYPE_NOT_FOUND = "The type '%s' was not found.";
+    private static final String TYPE_NOT_FOUND = "The type '%s' was not found, either the class name is " +
+            "wrong or there are compile errors in your code.";
     private static final String HINT_URL = "https://github.com/ArcBees/GWTP/wiki/Bootstrapping";
     private static final String DOES_NOT_EXTEND_INTERFACE = "'%s' doesn't implement the '%s' interface. See "
             + HINT_URL;
@@ -73,7 +79,6 @@ public String generate(TreeLogger treeLogger, GeneratorContext generatorContext,
             return typeName + SUFFIX;
         }
         try {
-
             JClassType preBootstrapper = getPreBootstrapper();
 
             ClassSourceFileComposerFactory composer = initComposer(preBootstrapper);
@@ -89,6 +94,15 @@ public String generate(TreeLogger treeLogger, GeneratorContext generatorContext,
             closeDefinition(sw);
 
             return getPackageName() + "." + getClassName();
+        } catch (UnableToCompleteException e) {
+            // Java compile errors can cause problems during compilation
+            // for tasks like TypeOracle#findType will return null if there
+            // are compile errors, we should at least hint this possibility.
+            getTreeLogger().log(TreeLogger.ERROR, PROBLEM_GENERATING);
+
+            // Return ApplicationControllerFallback class to avoid
+            // swallowing the actual compiler issues if there are any.
+            return ApplicationControllerFallback.class.getName();
         } finally {
             printWriter.close();
         }
@@ -117,12 +131,17 @@ private ClassSourceFileComposerFactory initComposer(JClassType preBootstrapper)
     private JClassType getBootstrapper() throws UnableToCompleteException {
         String typeName = lookupTypeNameByProperty(PROPERTY_NAME_BOOTSTRAPPER);
         if (typeName == null) {
-            getTreeLogger()
-                    .log(TreeLogger.ERROR, PROPERTY_BOOTSTRAPPER_EMPTY);
-            throw new UnableToCompleteException();
+
+            getTreeLogger().log(TreeLogger.ERROR, PROPERTY_BOOTSTRAPPER_EMPTY);
         }
 
-        return findAndVerifyType(typeName, Bootstrapper.class);
+        JClassType type;
+        try {
+            type = findAndVerifyType(typeName, Bootstrapper.class);
+        } catch (UnableToCompleteException ex) {
+            type = findAndVerifyType(typeName, BootstrapperFallback.class);
+        }
+        return type;
     }
 
     /**
@@ -134,7 +153,13 @@ private JClassType getPreBootstrapper() throws UnableToCompleteException {
             return null;
         }
 
-        return findAndVerifyType(typeName, PreBootstrapper.class);
+        JClassType type;
+        try {
+            type = findAndVerifyType(typeName, PreBootstrapper.class);
+        } catch (UnableToCompleteException ex) {
+            type = findAndVerifyType(typeName, PreBootstrapperFallback.class);
+        }
+        return type;
     }
 
     /**
@@ -162,7 +187,8 @@ private String lookupTypeNameByProperty(String propertyName) throws UnableToComp
     /**
      * Find the Java type by the given class name and verify that it extends the given interface.
      */
-    private JClassType findAndVerifyType(String typeName, Class<?> interfaceClass) throws UnableToCompleteException {
+    private JClassType findAndVerifyType(String typeName, Class<?> interfaceClass)
+            throws UnableToCompleteException {
         JClassType type = getTypeOracle().findType(typeName);
         if (type == null) {
             getTreeLogger().log(TreeLogger.ERROR, String.format(TYPE_NOT_FOUND, typeName));

pom.xml

@@ -179,6 +179,10 @@
             <name>Richard Wallis</name>
             <email>rdwallis@gmail.com</email>
         </contributor>
+        <contributor>
+            <name>Ben Dol</name>
+            <email>dolb90@gmail.com</email>
+        </contributor>
     </contributors>
 
     <scm>