6

我有一个 Maven 项目，我在其中使用 Hibernate 元模型生成器生成 JPA 元模型。

<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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>xxx</groupId>
        <artifactId>xxx</artifactId>
        <version>1.0.0-SNAPSHOT</version>
    </parent>
    <artifactId>xxx</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.1-api</artifactId>
            <version>1.0.0.Final</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
        </dependency>

        <dependency>
            <!-- needed for meta model generation (see also compiler plugin config) -->
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-jpamodelgen</artifactId>
            <version>4.3.8.Final</version>
        </dependency>
    </dependencies>
</project>

AspectJ 编译器在父项目中配置。当我运行 Maven 时，首先调用 Java 编译器插件并target/generated-sources/generated-sources/annotations正确生成源代码。然后执行 AspectJ 插件，它再次生成源代码，现在进入我项目的根文件夹并引发以下错误：

D:\xxx\git\xxx>mvn clean install
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building xxx 1.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ xxx ---
[INFO] Deleting D:\...
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ xxx ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO]
[INFO] --- maven-compiler-plugin:3.2:compile (default-compile) @ xxx ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 63 source files to D:\xxx\git\xxx\target\classes
[INFO]
[INFO] --- aspectj-maven-plugin:1.7:compile (default) @ xxx ---
[INFO] Showing AJC message detail for messages of types: [error, warning, fail]
[WARNING] Hibernate JPA 2 Static-Metamodel Generator 4.3.8.Final
        <unknown source file>:<no line information>

[ERROR] The type Category_ is already defined
        D:\xxx\git\xxx\Category_.java:10
public abstract class Category_ extends com.xxx.AbstractEntity_ {
                      ^^^^^^^^

[ERROR] The type Attachment_Message_ is already defined
         D:\xxx\git\xxx\Attachment_Message_.java:9
public abstract class Attachment_Message_ extends com.xxx.AbstractEntity_ {
                      ^^^^^^^^^^^^^^^^^^

[ERROR] The type AbstractNamedEntity_ is already defined
         D:\xxx\git\xxx\AbstractNamedEntity_.java:9
public abstract class AbstractNamedEntity_ extends com.xxx.AbstractEntity_ {

...

如何阻止 AspectJ 编译器第二次执行模型生成器？

4

2 回答 2

4

关键是AspectJ 1.8.2 是第一个包含导致生成的注释处理功能的版本。

有两种方法可以禁用生成：

  • 1）升级你的Maven-AspectJ-Plugin 1.8版，它有一个新的参数：proc，将其设置none 为禁用生成。请参阅GitHub 问题 #5，

    <plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>aspectj-maven-plugin</artifactId>
    <version>1.8</version>
    ...
    <configuration>
        ...
       <proc>none</proc>
   </configuration>
</plugin>

    或者

  • 2) 另一种“解决方案”是使用 AspectJ 版本 1.8.1，而不是 1.8.2+。

于 2015-02-18T19:00:09.833 回答
1

我从 aspectj 编译器中排除了模型类。这会禁用模型类的 Aspects（目前不需要），但也会禁用元模型类的双重生成：

<build>
    <plugins>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>aspectj-maven-plugin</artifactId>
            <configuration>
                <sources>
                    <source>
                        <basedir>src/main/java</basedir>
                        <excludes>
                            <exclude>**/domain/*</exclude>
                        </excludes>
                    </source>
                </sources>
            </configuration>
            <executions>
                <execution>
                    <goals>
                        <goal>compile</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>

    </plugins>
</build>
于 2015-01-19T10:18:32.017 回答