[英]Android annotation processing - generate different code for different build flavor
I'm building a library that requires some annotation processing to generate code. 我正在建立一个需要一些注释处理才能生成代码的库。 I now run into an issue that the release build doesn't need to have as much code as the debug build does (since this is a library for modifying configuration variants - primarily used for testing purposes).
我现在遇到一个问题,即发行版本不需要像调试版本那样具有那么多的代码(因为这是一个用于修改配置变量的库,主要用于测试目的)。 The following code illustrates the situations.
以下代码说明了这种情况。 Let's say I want to create a class ConfigManager from some annotated classes and properties.
假设我想从一些带注释的类和属性创建一个类ConfigManager。 In debug builds, I need this much:
在调试版本中,我非常需要:
public class ConfigManager {
public Class getConfigClass() {
return abc.class;
}
public void method1() {
doSomething1();
}
public void method2() {
doSomething2();
}
public void method3() {
doSomething3();
}
}
While in release builds, I only need this much: 在发布版本中,我只需要这么多:
public class ConfigManager {
public Class getConfigClass() {
return abc.class;
}
}
I have a feeling it may be possible by writing a Gradle plugin to check for build flavor at compile time and invoke a different processor/or somehow pass a parameter to a processor to generate different code. 我感觉有可能通过编写Gradle插件在编译时检查构建风格并调用不同的处理器/或以某种方式将参数传递给处理器以生成不同的代码来实现。 However this topic is pretty new to me so I'm not sure how to achieve this.
但是,这个主题对我来说还很陌生,所以我不确定如何实现。 A couple hours of googling also didnt help.
几个小时的谷歌搜索也没有帮助。 So I'm wondering if anyone could give me a direction or example?
所以我想知道是否有人可以给我一个方向或例子? Thanks
谢谢
Pass an option (release=true/false) to your processor. 将选项(release = true / false)传递给处理器。
From javac https://docs.oracle.com/javase/8/docs/technotes/tools/windows/javac.html 从javac https://docs.oracle.com/javase/8/docs/technotes/tools/windows/javac.html
-Akey[=value] Specifies options to pass to annotation processors.
-Akey [= value]指定要传递给注释处理器的选项。 These options are not interpreted by javac directly, but are made available for use by individual processors.
这些选项不是由javac直接解释的,而是可供单个处理器使用的。 The key value should be one or more identifiers separated by a dot (.).
键值应该是一个或多个用点(。)分隔的标识符。
In combination with Processor.html#getSupportedOptions https://docs.oracle.com/javase/8/docs/api/javax/annotation/processing/Processor.html#getSupportedOptions 结合Processor.html#getSupportedOptions https://docs.oracle.com/javase/8/docs/api/javax/annotation/processing/Processor.html#getSupportedOptions
Returns the options recognized by this processor.
返回此处理器识别的选项。 An implementation of the processing tool must provide a way to pass processor-specific options distinctly from options passed to the tool itself, see getOptions.
处理工具的实现必须提供一种与传递给工具本身的选项不同的,传递处理器特定选项的方法,请参见getOptions。
Implementation outline: 实施纲要:
public Set<String> getSupportedOptions() {
Set<String> set = new HashSet<>();
set.add("release");
return set;
}
// -Arelease=true
boolean isRelease(ProcessingEnvironment env) {
return Boolean.parseBoolean(env.getOptions().get("release"));
}
See Pass options to JPAAnnotationProcessor from Gradle for how to pass options in a gradle build. 请参阅从Gradle将选项传递给JPAAnnotationProcessor,以了解如何在gradle构建中传递选项。
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