如何使用OpenJDK 7编译mavenized OSGi 4.3软件包？

Question

我正在尝试使用OpenJDK7针对OSGi规范4.3编译我的OSGi包但我收到错误:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5:compile (default-compile) on project example: Compilation failure
[ERROR] /tmp/baka/example/src/main/java/org/example/Activator.java:[14,24] error: type ServiceReference does not take parameters

这是我的Activator.java:

package org.example;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;

public class Activator implements BundleActivator {
    @Override
    public void start(BundleContext bundleContext) throws Exception {
        ServiceReference<Runnable> ref = bundleContext.getServiceReference(Runnable.class);
    }

    @Override
    public void stop(BundleContext bundleContext) throws Exception {
    }
}

和我的pom.xml:

<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>org.example</groupId>
    <artifactId>example</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>bundle</packaging>

    <name>example</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.osgi</groupId>
            <artifactId>org.osgi.core</artifactId>
            <version>4.3.0</version>
        </dependency>
    </dependencies>


    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.felix</groupId>
                <artifactId>maven-bundle-plugin</artifactId>
                <version>2.3.7</version>
                <extensions>true</extensions>
                <configuration>
                    <instructions>
                        <Private-Package>org.example</Private-Package>
                        <Bundle-Activator>org.example.Activator</Bundle-Activator>
                    </instructions>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

当我使用OpenJDK 6时,不会出现此错误.任何提示如何使用OpenJDK 7？

Answer 1

您需要使用Java 7中的javac重新编译OSGi源代码.OSGi使用-target jsr14使用Java 6 javac编译代码.Java 7 javac删除了对这些类文件进行编译的支持:http://bugs.sun.com/bugdatabase/view_bug.do？video_id = 7078419

从R5开始,OSGi将不再发布-target jsr14类文件.

[2012年10月31日更新]

OSGi现在为Java 7提供了重新编译的4.3 jar文件.请参阅http://blog.osgi.org/2012/10/43-companion-code-for-java-7.html