Added GSON test case

src/main/java/spoon/reflect/factory/TypeFactory.java

@@ -565,9 +565,9 @@ public <T> CtType<T> get(Class<?> cl) {
 				} catch (Throwable e) {
 					throw new SpoonClassNotFoundException("cannot create shadow class: " + cl.getName(), e);
 				}
-				if (newShadowClass == null) {
+				/* if (newShadowClass == null) {
 					return null;
-				}
+				} */
 				newShadowClass.setFactory(factory);
 				newShadowClass.accept(new CtScanner() {
 					@Override

src/test/java/spoon/test/factory/TypeFactoryTest.java

@@ -19,17 +19,31 @@
 import com.mysema.query.types.expr.ComparableExpressionBase;
 import org.junit.Test;
 import spoon.Launcher;
+import spoon.MavenLauncher;
+import spoon.reflect.code.CtFieldRead;
+import spoon.reflect.code.CtInvocation;
 import spoon.reflect.code.CtJavaDoc;
+import spoon.reflect.code.CtVariableRead;
+import spoon.reflect.cu.position.NoSourcePosition;
+import spoon.reflect.declaration.CtElement;
+import spoon.reflect.declaration.CtField;
 import spoon.reflect.declaration.CtMethod;
+import spoon.reflect.declaration.CtParameter;
 import spoon.reflect.declaration.CtType;
 import spoon.reflect.factory.Factory;
 import spoon.reflect.factory.TypeFactory;
 import spoon.reflect.reference.CtTypeReference;
+import spoon.reflect.visitor.CtScanner;
 import spoon.test.factory.testclasses3.Cooking;
 import spoon.test.factory.testclasses3.Prepare;
 import spoon.testing.utils.ModelUtils;
 
 import java.io.File;
+import java.lang.annotation.Annotation;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -56,6 +70,51 @@ public void testCreateTypeRef() {
 		assertEquals("spoon.reflect.code.CtComment$CommentType", ctTypeReference.getQualifiedName());
 	}
 
+	@Test
+	public void gsonTestCase() throws ClassNotFoundException {
+		String projectRoot = "./src/test/resources/gsontest";
+		Launcher launcher = new MavenLauncher(projectRoot, MavenLauncher.SOURCE_TYPE.ALL_SOURCE);
+		launcher.getEnvironment().setIgnoreDuplicateDeclarations(true);
+		launcher.getEnvironment().setComplianceLevel(9);
+		launcher.buildModel();
+
+		Map<String, CtElement> typeByFile = new HashMap<>();
+        for (CtElement el : launcher.getModel().getAllTypes()) {
+            typeByFile.put(el.getPosition().getFile().getPath(), el);
+        }
+
+        Map<String, DocumentIndexer> indexers = new HashMap<>();
+        for (Map.Entry<String, CtElement> pathname : typeByFile.entrySet()) {
+            indexers.put(pathname.getKey(), new DocumentIndexer(pathname.getValue()));
+		}
+
+		for (DocumentIndexer indexer : indexers.values()) {
+            indexer.visitReferences();
+        }
+	}
+
+	public class DocumentIndexer {
+		private CtElement spoonElement;
+
+		public DocumentIndexer(CtElement spoonElement) {
+			this.spoonElement = spoonElement;
+		}
+
+		public void visitReferences() {
+			this.spoonElement.accept(new ReferencesVisitor());
+		}
+
+		private class ReferencesVisitor extends CtScanner {
+			@Override
+			public <T> void visitCtVariableRead(CtVariableRead<T> el) {
+				super.visitCtVariableRead(el);
+				if (el.getVariable().getDeclaration() == null) {
+					return;
+				}
+			}
+		}
+	}
+
 	@Test
 	public void reflectionAPI() {
 		// Spoon can be used as reflection API

src/test/resources/gsontest/.gitignore

@@ -0,0 +1,22 @@
+.classpath
+.project
+.settings
+eclipsebin
+target
+*/target
+pom.xml.*
+release.properties
+
+.idea
+*.iml
+*.ipr
+*.iws
+classes
+
+.gradle
+local.properties
+build
+
+.DS_Store
+
+examples/android-proguard-example/gen

src/test/resources/gsontest/codegen/pom.xml

@@ -0,0 +1,182 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.google.code.gson</groupId>
+  <artifactId>gson-codegen</artifactId>
+  <packaging>jar</packaging>
+  <version>1.0-SNAPSHOT</version>
+  <inceptionYear>2008</inceptionYear>
+  <name>Gson Code Gen</name>
+  <parent>
+    <groupId>org.sonatype.oss</groupId>
+    <artifactId>oss-parent</artifactId>
+    <version>7</version>
+  </parent>
+  <url>http://code.google.com/p/google-gson/</url>
+  <description>Google Gson grab bag of utilities, type adapters, etc.</description>
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+  <licenses>
+    <license>
+      <name>The Apache Software License, Version 2.0</name>
+      <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
+      <distribution>repo</distribution>
+    </license>
+  </licenses>
+  <scm>
+    <connection>scm:svn:http://google-gson.googlecode.com/svn/trunk/extras</connection>
+    <developerConnection>scm:svn:https://google-gson.googlecode.com/svn/trunk/extras</developerConnection>
+    <url>http://google-gson.codegoogle.com/svn/trunk/extras</url>
+  </scm>
+  <issueManagement>
+    <system>Google Code Issue Tracking</system>
+    <url>http://code.google.com/p/google-gson/issues/list</url>
+  </issueManagement>
+  <organization>
+    <name>Google, Inc.</name>
+    <url>http://www.google.com</url>
+  </organization>
+  <dependencies>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>3.8.2</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+  <profiles>
+    <!-- Activate PGP signing only when performing a release -->
+    <profile>
+      <id>release-sign-artifacts</id>
+      <activation>
+        <property>
+          <name>performRelease</name>
+          <value>true</value>
+        </property>
+      </activation>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-gpg-plugin</artifactId>
+            <version>1.4</version>
+            <executions>
+              <execution>
+                <id>sign-artifacts</id>
+                <phase>verify</phase>
+                <goals>
+                  <goal>sign</goal>
+                </goals>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
+  </profiles>  
+  <build>
+    <defaultGoal>package</defaultGoal>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>2.5.1</version>
+        <configuration>
+          <source>1.6</source>
+          <target>1.6</target>
+          <compilerArgument>-proc:none</compilerArgument>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+        <version>2.4</version>
+        <executions>
+          <execution>
+            <phase>package</phase>
+            <goals>
+              <goal>jar</goal>
+            </goals>
+          </execution>
+        </executions>
+        <configuration>
+          <archive>
+            <addMavenDescriptor>false</addMavenDescriptor>
+          </archive>
+        </configuration>
+      </plugin>
+      <plugin>
+         <groupId>org.apache.maven.plugins</groupId>
+         <artifactId>maven-source-plugin</artifactId>
+         <version>2.1.2</version>
+         <executions>
+           <execution>
+             <id>attach-sources</id>
+             <phase>verify</phase>
+             <goals>
+               <goal>jar</goal>
+             </goals>
+           </execution>
+         </executions>
+       </plugin>
+       <plugin>
+         <groupId>org.apache.maven.plugins</groupId>
+         <artifactId>maven-javadoc-plugin</artifactId>
+         <version>2.8.1</version>
+         <executions>
+           <execution>
+             <id>attach-javadocs</id>
+             <goals>
+               <goal>jar</goal>
+             </goals>
+           </execution>
+         </executions>
+         <configuration>
+           <links>
+             <link>http://download.oracle.com/javase/1.5.0/docs/api/</link>
+           </links>
+           <version>true</version>
+           <show>public</show>
+         </configuration>
+       </plugin>
+       <plugin>
+         <groupId>org.apache.maven.plugins</groupId>
+         <artifactId>maven-eclipse-plugin</artifactId>
+         <version>2.9</version>
+         <configuration>
+           <downloadSources>true</downloadSources>
+           <downloadJavadocs>true</downloadJavadocs>
+           <workspace>
+             ../eclipse-ws/
+           </workspace>
+           <workspaceCodeStylesURL>
+             file:///${basedir}/../lib/gson-formatting-styles.xml
+           </workspaceCodeStylesURL>
+         </configuration>
+       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-release-plugin</artifactId>
+        <!--  version>2.3.2</version -->
+        <configuration>
+          <arguments>-DenableCiProfile=true</arguments>
+          <tagBase>https://google-gson.googlecode.com/svn/tags/</tagBase>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <developers>
+    <developer>
+      <name>Inderjeet Singh</name>
+      <organization>Trymph Inc.</organization>
+    </developer>
+    <developer>
+      <name>Joel Leitch</name>
+      <organization>Google Inc.</organization>
+    </developer>
+    <developer>
+      <name>Jesse Wilson</name>
+      <organization>Square Inc.</organization>
+    </developer>
+  </developers>
+</project>

src/test/resources/gsontest/codegen/src/main/java/com/google/gson/codegen/CodeGen.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2012 Square, 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.google.gson.codegen;
+
+import javax.lang.model.element.Element;
+import javax.lang.model.element.ElementKind;
+import javax.lang.model.element.PackageElement;
+import javax.lang.model.element.TypeElement;
+
+public class CodeGen {
+  private CodeGen() {
+  }
+
+  public static PackageElement getPackage(Element type) {
+    while (type.getKind() != ElementKind.PACKAGE) {
+      type = type.getEnclosingElement();
+    }
+    return (PackageElement) type;
+  }
+
+  /**
+   * Returns a fully qualified class name to complement {@code type}.
+   */
+  public static String adapterName(TypeElement typeElement, String suffix) {
+    StringBuilder builder = new StringBuilder();
+    rawTypeToString(builder, typeElement, '$');
+    builder.append(suffix);
+    return builder.toString();
+  }
+
+  static void rawTypeToString(StringBuilder result, TypeElement type, char innerClassSeparator) {
+    String packageName = getPackage(type).getQualifiedName().toString();
+    String qualifiedName = type.getQualifiedName().toString();
+    result.append(packageName);
+    result.append('.');
+    result.append(
+        qualifiedName.substring(packageName.length() + 1).replace('.', innerClassSeparator));
+  }
+}

src/test/resources/gsontest/codegen/src/main/java/com/google/gson/codegen/GeneratedTypeAdapter.java

@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2012 Google 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.google.gson.codegen;
+
+public @interface GeneratedTypeAdapter {
+  Class<?>[] value() default {};
+}