Use jacoco instead of cobertura for coverage rate collectiong (#1575)

.travis.yml

@@ -2,12 +2,12 @@ language: java
 sudo: false # faster builds
 
 jdk:
+    - oraclejdk9
     - oraclejdk8
     - openjdk7
 
 script:
     - travis_wait 30 mvn clean package
-    - travis_wait 30 mvn cobertura:cobertura
 
 after_success:
   - bash <(curl -s https://codecov.io/bash)

dubbo-common/src/main/java/com/alibaba/dubbo/common/utils/ReflectUtils.java

@@ -910,6 +910,9 @@ public final class ReflectUtils {
                 while (cls != null && cls != Object.class) {
                     Field[] fields = cls.getDeclaredFields();
                     for (Field field : fields) {
+                        if (field.isSynthetic()) {
+                            continue;
+                        }
                         Object property = getEmptyObject(field.getType(), emptyInstances, level + 1);
                         if (property != null) {
                             try {

pom.xml

@@ -111,10 +111,10 @@
         <maven_deploy_version>2.8.2</maven_deploy_version>
         <maven_compiler_version>3.6.0</maven_compiler_version>
         <maven_source_version>3.0.1</maven_source_version>
-        <maven_cobertura_version>2.7</maven_cobertura_version>
         <maven_javadoc_version>3.0.0</maven_javadoc_version>
         <maven_jetty_version>6.1.26</maven_jetty_version>
         <maven_checkstyle_version>3.0.0</maven_checkstyle_version>
+        <maven_jacoco_version>0.8.1</maven_jacoco_version>
     </properties>
 
     <modules>
@@ -184,7 +184,6 @@
                 <maven_deploy_version>2.7</maven_deploy_version>
                 <maven_compiler_version>3.1</maven_compiler_version>
                 <maven_source_version>3.0.1</maven_source_version>
-                <maven_cobertura_version>2.7</maven_cobertura_version>
                 <maven_javadoc_version>2.10.1</maven_javadoc_version>
             </properties>
         </profile>
@@ -338,7 +337,7 @@
                 <configuration>
                     <useSystemClassLoader>true</useSystemClassLoader>
                     <forkMode>once</forkMode>
-                    <argLine>${argline}</argLine>
+                    <argLine>${argline} ${jacocoArgLine}</argLine>
                     <systemProperties>
                         <!-- common shared -->
                         <property>
@@ -422,16 +421,27 @@
                 </configuration>
             </plugin>
             <plugin>
-                <groupId>org.codehaus.mojo</groupId>
-                <artifactId>cobertura-maven-plugin</artifactId>
-                <version>${maven_cobertura_version}</version>
-                <configuration>
-                    <formats>
-                        <format>html</format>
-                        <format>xml</format>
-                    </formats>
-                    <check/>
-                </configuration>
+                <groupId>org.jacoco</groupId>
+                <artifactId>jacoco-maven-plugin</artifactId>
+                <version>${maven_jacoco_version}</version>
+                <executions>
+                    <execution>
+                        <id>jacoco-initialize</id>
+                        <goals>
+                            <goal>prepare-agent</goal>
+                        </goals>
+                        <configuration>
+                            <propertyName>jacocoArgLine</propertyName>
+                        </configuration>
+                    </execution>
+                    <execution>
+                        <id>jacoco-site</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>report</goal>
+                        </goals>
+                    </execution>
+                </executions>
             </plugin>
         </plugins>