ESH Constants Generator Maven Plugin

What?

This plugin generates Java constants classes with all namings defined in the ESH_INF folder files.

Why?

Because it's hard to write this classes on your own, if you have a lot of content. Also, the XML files should be in the lead and your code base is in sync all the time.

How?

The plugin scans for all XML files in the given input directory. It parses every file (DOM parsing, so do not put extremely large files there) and looks for the nodes listed below. The text content of those matching nodes are collected and put together to a Java constant class.

Constant Type	XPath	Constant Prefix	Description
Binding ID	//thing-descriptions/@bindingId	BINDING_ID_	The ID of the binding
Thing Type ID	//thing-type/@id	THING_TYPE_ID_	The ID of a thing type
Bridge Type ID	//bridge-type/@id	BRIDGE_TYPE_ID_	The ID of a bridge type
Channel ID	//channel/@id	CID_	The ID of a channel
Channel Type ID	//channel-type/@id	CHANNEL_TYPE_ID_	The ID of a channel type
Channel Group Type ID	//channel-group-type/@id	CHANNEL_GROUP_TYPE_ID_	The ID of a channel group type
Channel Group ID	//channel-group/@id	GID_	The ID of a channel group

Next to a file containing all the constant string values, the plugin also generates another file containing ThingTypeUID and ChannelUID constants. The latter are separated from the strings to allow importing the strings into non-ESH environments.

Usage

Plugin Goals:

Goal	Default Phase	Description
generate-esh-constants	generate-sources	Generates the constants Java class

Plugin Configuration:

Configuration	Default Value	Description
packageName	-	Java package name
stringsClassName	-	Name of the Java class containing all string constants
openhabClassName	-	Name of the Java class containing all UID constants
inputDirectory	src/main/resources/ESH-INF	Input directory
outputDirectory	target/generated-sources	Output directory

Example:

<plugins>
 <plugin>
  <groupId>io.kokuwa.edge</groupId>
  <artifactId>esh-constants-maven-plugin</artifactId>
  <version>RELEASE</version>
  <executions>
   <execution>
    <id>generate-esh-constants</id>
    <goals>
     <goal>generate-esh-constants</goal>
    </goals>
    <phase>generate-sources</phase>
    <configuration>
     <packageName>io.kokuwa.examples</packageName>
     <stringsClassName>StringConstants</stringsClassName>
     <openhabClassName>OHConstants</openhabClassName>
     <inputDirectory>${project.basedir}/src/main/resources/ESH-INF</inputDirectory>
     <outputDirectory>${project.build.directory}/generated-sources</outputDirectory>
    </configuration>
   </execution>
  </executions>
 </plugin>
</plugins>

Contribution

Feel free to add every missing constant XPath as a pull request or kick off an issue on every trouble.

TODOs

• Generate all UIDs
• Generate channel group association
• Generate XMLs / Constants (even parts of handler?) form OpenAPI file