如何使用 YANG 编译器将 Yang 转换为 Java？

【问题标题】：How can I use YANG Compiler to convert Yang to Java?如何使用 YANG 编译器将 Yang 转换为 Java？
【发布时间】：2021-12-02 11:19:21
【问题描述】：

我正在尝试使用 ONOS YANG 编译器从 Yang 生成 Java 代码。 我按照 Wiki 上的说明进行编译，但出现编译错误，无法从 Yang 生成 Java 代码。

YANG Compiler

以下是错误信息。

●版本：

$ mvn -version
Apache Maven 3.8.2 (ea98e05a04480131370aa0c110b8c54cf726c06f)
Maven home: C:\tools\apache-maven-3.8.2
Java version: 1.8.0_202, vendor: Oracle Corporation, runtime: C:\pleiades\java\8\jre
Default locale: ja_JP, platform encoding: MS932
OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"

$ java -version
java version "1.8.0_311"
Java(TM) SE Runtime Environment (build 1.8.0_311-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.311-b11, mixed mode)

●pom.xml：

<!-- 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 https://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>
    
    <groupId>jp.co.test</groupId>
    <artifactId>test_yang</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>
    
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <maven.compiler.target>${java.version}</maven.compiler.target>
        <maven.compiler.source>${java.version}</maven.compiler.source>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.onosproject</groupId>
            <artifactId>onos-yang-maven-plugin</artifactId>
            <version>1.9</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.onosproject/onos-api -->
        <dependency>
            <groupId>org.onosproject</groupId>
            <artifactId>onos-api</artifactId>
            <version>2.6.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.felix/org.apache.felix.scr -->
        <dependency>
            <groupId>org.apache.felix</groupId>
            <artifactId>org.apache.felix.scr.annotations</artifactId>
            <version>1.12.0</version>
        </dependency>
        
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.onosproject</groupId>
                <artifactId>onos-yang-maven-plugin</artifactId>
                <version>1.9</version>
                <executions>
                    <execution>
                        <configuration>
                            <yangFilesDir>src/main/yang</yangFilesDir>
                            <classFileDir>src/main/java</classFileDir>
                         </configuration>
                        <goals>
                            <goal>yang2java</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

●目录：

└─test_yang
    ├─pom.xml
    │  
    ├─src
    │  └─main
    │      ├─java
    │      └─yang
    │          ├─ openconfig-terminal-device.yang
    │          └─ test.yang
    │              
    └─target
        ├─classes
        └─test-classes

●错误信息

$ mvn clean install -X

...

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  1.789 s
[INFO] Finished at: 2021-12-02T20:14:21+09:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.onosproject:onos-yang-maven-plugin:1.9:yang2java (default) on project test_yang: Execution default of goal org.onosproject:onos-yang-maven-plugin:1.9:yang2java failed: Unexpected internal error near index 1
[ERROR] \
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.onosproject:onos-yang-maven-plugin:1.9:yang2java (default) on project test_yang: Execution default of goal org.onosproject:onos-yang-maven-plugin:1.9:yang2java failed: Unexpected internal error near index 1
\
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:215)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:972)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:196)
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default of goal org.onosproject:onos-yang-maven-plugin:1.9:yang2java failed: Unexpected internal error near index 1
\
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:148)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:972)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:196)
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: java.util.regex.PatternSyntaxException: Unexpected internal error near index 1
\
    at java.util.regex.Pattern.error (Pattern.java:1957)
    at java.util.regex.Pattern.compile (Pattern.java:1704)
    at java.util.regex.Pattern.<init> (Pattern.java:1351)
    at java.util.regex.Pattern.compile (Pattern.java:1028)
    at java.lang.String.split (String.java:2380)
    at java.lang.String.split (String.java:2422)
    at org.onosproject.yangutils.utils.io.impl.YangIoUtils.getDirectory (YangIoUtils.java:294)
    at org.onosproject.yangutils.plugin.manager.YangUtilManager.execute (YangUtilManager.java:200)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:972)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:196)
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException

我是否错误地使用了 YANG 编译器？

如果您对此有任何了解，请告诉我。

谢谢。

【问题讨论】：

    标签： java maven sdn onos yang


    【解决方案1】：

    这是我的pom

    <plugin>
<groupId>org.onosproject</groupId>
<artifactId>onos-yang-maven-plugin</artifactId>
<version>1.11</version>
<executions>
    <execution>
        <configuration>
            <classFileDir>src/main/java</classFileDir>
        </configuration>
        <goals>
            <goal>yang2java</goal>
        </goals>
    </execution>
</executions>
<configuration>
    <yangFilesDir>src/main/yang</yangFilesDir>
    <classFileDir>src/main/java</classFileDir>
</configuration>

    而我的 pom 没有

    <dependency>
        <groupId>org.onosproject</groupId>
        <artifactId>onos-yang-maven-plugin</artifactId>
        <version>1.9</version>
    </dependency>

    【讨论】：

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