是否可以在同一 Maven 项目的源文件中动态生成和引用类？

在 Maven Build 中，我使用字节代码生成库 （Byte Buddy） 动态生成一些 Java 类型。当然，这些类文件没有相应的源文件。以这种方式只会生成几个类。这个项目的大部分代码将是Java源代码。理想情况下，Java源代码将以静态方式引用生成的类型，而不是使用反射或运行时代码生成，这意味着类需要位于javac的编译类路径上。我是否可以在同一 Maven 项目的编译类路径上获取生成的类，即没有单独的 Maven 项目和工件来保存包含源代码的 Maven 项目引用的生成的字节代码？

更新：我已经尝试过将生成的类直接放入Maven构建生命周期的早期，但似乎不在类路径上。生成的类型无法由 Maven 编译器插件或 IDE 解析。我还尝试使用Build Helper Maven插件在包含生成的类下添加一个额外的资源目录，然后将其自动复制到.此配置表现出相同的问题。target/classesproject.build.outputDirectorytargettarget/classes

更新：我在GitHub上创建了一个完整的公共存储库：https://github.com/mches/so-42376851

以下是我想要的项目的Maven POM，我希望具有引用字节码增强类的静态类：

<?xml version="1.0" encoding="UTF-8"?>
<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>demo</groupId>
        <artifactId>demo</artifactId>
        <version>1.0-SNAPSHOT</version>
        <relativePath>../pom.xml</relativePath>
    </parent>

    <artifactId>demo-enhanced</artifactId>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <executions>
                    <execution>
                        <phase>generate-resources</phase>
                        <goals>
                            <goal>unpack</goal>
                        </goals>
                        <configuration>
                            <artifactItems>
                                <artifactItem>
                                    <groupId>demo</groupId>
                                    <artifactId>demo-original</artifactId>
                                    <version>${project.version}</version>
                                    <overWrite>true</overWrite>
                                    <outputDirectory>${project.build.outputDirectory}</outputDirectory>
                                    <includes>**/*.class</includes>
                                    <excludes>META-INF/</excludes>
                                </artifactItem>
                            </artifactItems>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>net.bytebuddy</groupId>
                <artifactId>byte-buddy-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <phase>process-resources</phase>
                        <goals>
                            <goal>transform</goal>
                        </goals>
                        <configuration>
                            <initialization>
                                <entryPoint>net.bytebuddy.test.SimpleEntryPoint</entryPoint>
                                <groupId>demo</groupId>
                                <artifactId>demo-transformer</artifactId>
                            </initialization>
                            <transformations>
                                <transformation>
                                    <plugin>net.bytebuddy.test.SimplePlugin</plugin>
                                    <groupId>demo</groupId>
                                    <artifactId>demo-transformer</artifactId>
                                </transformation>
                            </transformations>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

这是父 POM：

<?xml version="1.0" encoding="UTF-8"?>
<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>

    <groupId>demo</groupId>
    <artifactId>demo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>

    <modules>
        <module>demo-original</module>
        <module>demo-transformer</module>
        <module>demo-enhanced</module>
    </modules>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <byte-buddy.version>1.6.9</byte-buddy.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>net.bytebuddy</groupId>
                <artifactId>byte-buddy</artifactId>
                <version>${byte-buddy.version}</version>
            </dependency>
            <dependency>
                <groupId>demo</groupId>
                <artifactId>demo-original</artifactId>
                <version>${project.version}</version>
            </dependency>
            <dependency>
                <groupId>demo</groupId>
                <artifactId>demo-transformer</artifactId>
                <version>${project.version}</version>
            </dependency>
            <dependency>
                <groupId>demo</groupId>
                <artifactId>demo-enhanced</artifactId>
                <version>${project.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>net.bytebuddy</groupId>
                    <artifactId>byte-buddy-maven-plugin</artifactId>
                    <version>${byte-buddy.version}</version>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>

</project>

foo/Bar.java（原始来源）：

package foo;

public class Bar {
}

net/bytebuddy/test/SimplePlugin.java （byte code enhancer）：

package net.bytebuddy.test;

import net.bytebuddy.build.Plugin;
import net.bytebuddy.description.modifier.Visibility;


import net.bytebuddy.description.type.TypeDescription;
import net.bytebuddy.dynamic.DynamicType;
import net.bytebuddy.implementation.FieldAccessor;

public class SimplePlugin implements Plugin {
    @Override
    public boolean matches(TypeDescription target) {
        return target.getName().equals("foo.Bar");
    }

    @Override
    public DynamicType.Builder<?> apply(DynamicType.Builder<?> builder, TypeDescription typeDescription) {
        if (typeDescription.getTypeName().equals("foo.Bar")) {
            builder = builder.defineField("qux", String.class, Visibility.PRIVATE)
                    .defineMethod("getQux", String.class, Visibility.PUBLIC)
                    .intercept(FieldAccessor.ofField("qux"))
                    .defineMethod("setQux", void.class, Visibility.PUBLIC)
                    .withParameter(String.class)
                    .intercept(FieldAccessor.ofField("qux"));
        }
        return builder;
    }
}

foo/Baz.java（引用动态类型的静态源文件）：

package foo;

public class Baz {
    private Bar bar = new Bar();

    public String getQuux() {
        return bar.getQux();
    }

    public void setQuux(String quux) {
        bar.setQux(quux);
    }
}

更新：Maven 似乎理解一个结构，该结构涉及一个具有增强字节代码和静态类源代码的合并模块，以及每个模块的单独模块，但是 IDE，IntelliJ 和 Eclipse 无法像 Maven 那样理解任何一种结构的类路径。