Maven插件配置将参数设置为class

Question

I'm developing a maven plugin with a goal that has a parameter of a class.

I want to configure this goal to use a special class.

This is my Mojo of the maven plugin:

/**
 * The used parser.
 * 
 * @parameter expression="${parser}"
 */
private EndpointParser parser;

public void execute() throws MojoExecutionException {

This is my pom.xml of the project using the plugin:

...
<plugins>
        <plugin>
            <groupId>foo</groupId>
            <artifactId>bar</artifactId>
            <configuration>
                <parser>com.foo.bar.MyEndpointParser</parser>
            </configuration>
            <executions>
                <execution>
                    <goals>
                        <goal>generate</goal>
                    </goals>
                    <phase>generate-sources</phase>
                </execution>
            </executions>
        </plugin>
    </plugins>
...

How do I get it working.

Answer 1

If MyEndPointParser is not part of your plugin but another project (which is not isself a dependency of your plugin) you have to declare it as dependency not of your project but of your plugin eg

<plugins>
    <plugin>
        <groupId>foo</groupId>
        <artifactId>bar</artifactId>
        <configuration>
            <parser>com.foo.bar.MyEndpointParser</parser>
        </configuration>

        <dependencies>
            <dependency>
                <groupId>foo</groupId>
                <artifactId>contains-my-endpoint-parser</artifactId>
            </dependency>
        </dependencies>

        <executions>
            <execution>
                <goals>
                    <goal>generate</goal>
                </goals>
                <phase>generate-sources</phase>
            </execution>
        </executions>
    </plugin>
</plugins>

Answer 2

I think this should work:

<configuration>
  <parser implementation="com.foo.bar.MyEndpointParser"/>
</configuration>

However, it's probably easier if you configure MyEndpointParser as a Component . I can't find any up2date documentation for it. You could have a look at the sources of the maven-compiler-plugin. There you have a parameter for the compilerId to switch between implementations.