Add i18n-maven-plugin to make internationalization easier

tools/i18n-plugin/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" output="target/classes" path="src/main/java">
+		<attributes>
+			<attribute name="optional" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry excluding="**" kind="src" output="target/classes" path="src/main/resources">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" output="target/test-classes" path="src/test/java">
+		<attributes>
+			<attribute name="optional" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry excluding="**" kind="src" output="target/test-classes" path="src/test/resources">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+			<attribute name="test" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="output" path="target/classes"/>
+</classpath>

tools/i18n-plugin/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>i18n-maven-plugin</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
+	</natures>
+</projectDescription>

tools/i18n-plugin/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<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>
+
+  <parent>
+    <groupId>org.openhab.core.tools</groupId>
+    <artifactId>org.openhab.core.reactor.tools</artifactId>
+    <version>3.2.0-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>i18n-maven-plugin</artifactId>
+
+  <packaging>maven-plugin</packaging>
+
+  <name>Internationalization Maven Plugin</name>
+  <description>Generates translations files</description>
+
+  <properties>
+    <maven.core.version>3.6.0</maven.core.version>
+    <maven.plugin.api.version>3.6.0</maven.plugin.api.version>
+    <maven.plugin.annotations.version>3.6.0</maven.plugin.annotations.version>
+    <maven.plugin.plugin.version>3.6.0</maven.plugin.plugin.version>
+    <maven.plugin.compiler.version>3.8.1</maven.plugin.compiler.version>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>com.thoughtworks.xstream</groupId>
+      <artifactId>xstream</artifactId>
+      <version>1.4.18</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-plugin-api</artifactId>
+      <version>${maven.plugin.api.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven.plugin-tools</groupId>
+      <artifactId>maven-plugin-annotations</artifactId>
+      <version>${maven.plugin.annotations.version}</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven.plugins</groupId>
+      <artifactId>maven-plugin-plugin</artifactId>
+      <version>${maven.plugin.plugin.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.eclipse.jdt</groupId>
+      <artifactId>org.eclipse.jdt.annotation</artifactId>
+      <version>2.2.100</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.openhab.core.bundles</groupId>
+      <artifactId>org.openhab.core.binding.xml</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.openhab.core.bundles</groupId>
+      <artifactId>org.openhab.core.config.xml</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.openhab.core.bundles</groupId>
+      <artifactId>org.openhab.core.thing.xml</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.openhab.core.bom</groupId>
+      <artifactId>org.openhab.core.bom.test</artifactId>
+      <version>${project.version}</version>
+      <type>pom</type>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.openhab.core.bom</groupId>
+      <artifactId>org.openhab.core.bom.test-index</artifactId>
+      <version>${project.version}</version>
+      <type>pom</type>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <artifactId>maven-plugin-plugin</artifactId>
+        <version>${maven.plugin.plugin.version}</version>
+        <executions>
+          <execution>
+            <id>default-addPluginArtifactMetadata</id>
+            <goals>
+              <goal>addPluginArtifactMetadata</goal>
+            </goals>
+            <phase>package</phase>
+          </execution>
+          <execution>
+            <id>default-descriptor</id>
+            <goals>
+              <goal>descriptor</goal>
+            </goals>
+            <phase>process-classes</phase>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+</project>

tools/i18n-plugin/src/main/java/org/openhab/core/tools/i18n/plugin/AbstractI18nMojo.java

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+/**
+ * Copyright (c) 2010-2021 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.core.tools.i18n.plugin;
+
+import java.io.File;
+import java.io.IOException;
+
+import org.apache.maven.plugin.AbstractMojo;
+import org.apache.maven.plugins.annotations.Parameter;
+import org.eclipse.jdt.annotation.NonNullByDefault;
+
+/**
+ * Base class for internationalization mojos using openHAB XML information.
+ *
+ * @author Wouter Born - Initial contribution
+ */
+@NonNullByDefault
+public abstract class AbstractI18nMojo extends AbstractMojo {
+
+    /**
+     * The directory containing the bundle openHAB information
+     */
+    @Parameter(property = "i18n.ohinf.dir", defaultValue = "${project.basedir}/src/main/resources/OH-INF")
+    protected @NonNullByDefault({}) File ohinfDirectory;
+
+    protected BundleInfo bundleInfo = new BundleInfo();
+
+    protected boolean ohinfExists() {
+        return ohinfDirectory.exists();
+    }
+
+    protected void readAddonInfo() throws IOException {
+        BundleInfoReader bundleInfoReader = new BundleInfoReader(getLog());
+        bundleInfo = bundleInfoReader.readBundleInfo(ohinfDirectory.toPath());
+    }
+
+    void setOhinfDirectory(File ohinfDirectory) {
+        this.ohinfDirectory = ohinfDirectory;
+    }
+}

tools/i18n-plugin/src/main/java/org/openhab/core/tools/i18n/plugin/BundleInfo.java

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+/**
+ * Copyright (c) 2010-2021 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.core.tools.i18n.plugin;
+
+import java.net.URI;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.openhab.core.binding.xml.internal.BindingInfoXmlResult;
+import org.openhab.core.config.core.ConfigDescription;
+import org.openhab.core.thing.xml.internal.ChannelGroupTypeXmlResult;
+import org.openhab.core.thing.xml.internal.ChannelTypeXmlResult;
+import org.openhab.core.thing.xml.internal.ThingTypeXmlResult;
+
+/**
+ * The bundle information provided by the openHAB XML files in the <code>OH-INF</code> directory.
+ *
+ * @author Wouter Born - Initial contribution
+ */
+@NonNullByDefault
+public class BundleInfo {
+
+    private @Nullable BindingInfoXmlResult bindingInfoXml;
+    private List<ConfigDescription> configDescriptions = new ArrayList<>(5);
+    private List<ChannelGroupTypeXmlResult> channelGroupTypesXml = new ArrayList<>(5);
+    private List<ChannelTypeXmlResult> channelTypesXml = new ArrayList<>(5);
+    private List<ThingTypeXmlResult> thingTypesXml = new ArrayList<>(5);
+
+    public @Nullable BindingInfoXmlResult getBindingInfoXml() {
+        return bindingInfoXml;
+    }
+
+    public void setBindingInfoXml(BindingInfoXmlResult bindingInfo) {
+        this.bindingInfoXml = bindingInfo;
+    }
+
+    public List<ConfigDescription> getConfigDescriptions() {
+        return configDescriptions;
+    }
+
+    public void setConfigDescriptions(List<ConfigDescription> configDescriptions) {
+        this.configDescriptions = configDescriptions;
+    }
+
+    public List<ChannelGroupTypeXmlResult> getChannelGroupTypesXml() {
+        return channelGroupTypesXml;
+    }
+
+    public void setChannelGroupTypesXml(List<ChannelGroupTypeXmlResult> channelGroupTypesXml) {
+        this.channelGroupTypesXml = channelGroupTypesXml;
+    }
+
+    public List<ChannelTypeXmlResult> getChannelTypesXml() {
+        return channelTypesXml;
+    }
+
+    public void setChannelTypesXml(List<ChannelTypeXmlResult> channelTypesXml) {
+        this.channelTypesXml = channelTypesXml;
+    }
+
+    public List<ThingTypeXmlResult> getThingTypesXml() {
+        return thingTypesXml;
+    }
+
+    public void setThingTypesXml(List<ThingTypeXmlResult> thingTypesXml) {
+        this.thingTypesXml = thingTypesXml;
+    }
+
+    public String getBindingId() {
+        BindingInfoXmlResult localBindingInfoXml = bindingInfoXml;
+        return localBindingInfoXml == null ? "" : localBindingInfoXml.getBindingInfo().getUID();
+    }
+
+    public Optional<ConfigDescription> getConfigDescription(@Nullable URI uri) {
+        if (uri == null) {
+            return Optional.empty();
+        }
+
+        return configDescriptions.stream().filter(configDescription -> configDescription.getUID().equals(uri))
+                .findFirst();
+    }
+}