config option provider for language & region settings

Signed-off-by: Simon Kaufmann <simon.kfm@googlemail.com>

bundles/config/org.eclipse.smarthome.config.core.test/.classpath

@@ -3,6 +3,7 @@
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="src" path="src/test/groovy"/>
+	<classpathentry kind="src" path="src/test/java"/>
 	<classpathentry exported="true" kind="con" path="GROOVY_DSL_SUPPORT"/>
 	<classpathentry kind="output" path="target/test-classes"/>
 </classpath>

bundles/config/org.eclipse.smarthome.config.core.test/src/test/java/org/eclipse/smarthome/config/core/internal/i18n/I18nConfigOptionsProviderTest.java

@@ -0,0 +1,59 @@
+/**
+ * Copyright (c) 2014-2017 by the respective copyright holders.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.eclipse.smarthome.config.core.internal.i18n;
+
+import static org.junit.Assert.*;
+
+import java.net.URI;
+import java.util.Locale;
+
+import org.eclipse.smarthome.config.core.ParameterOption;
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * Tests for {@link I18nConfigOptionsProvider}
+ *
+ * @author Simon Kaufmann - initial contribution and API
+ *
+ */
+public class I18nConfigOptionsProviderTest {
+
+    private I18nConfigOptionsProvider provider;
+    private ParameterOption expectedLangEN = new ParameterOption("en", "English");
+    private ParameterOption expectedLangFR = new ParameterOption("en", "anglais");
+    private ParameterOption expectedCntryEN = new ParameterOption("US", "United States");
+    private ParameterOption expectedCntryFR = new ParameterOption("US", "Etats-Unis");
+    private URI uriI18N;
+
+    @Before
+    public void setup() throws Exception {
+        provider = new I18nConfigOptionsProvider();
+        uriI18N = new URI("system:i18n");
+    }
+
+    @Test
+    public void testLanguage() throws Exception {
+        assertTrue(provider.getParameterOptions(uriI18N, "language", Locale.US).contains(expectedLangEN));
+        assertTrue(provider.getParameterOptions(uriI18N, "language", Locale.FRENCH).contains(expectedLangFR));
+        assertFalse(provider.getParameterOptions(uriI18N, "language", null).isEmpty());
+    }
+
+    @Test
+    public void testRegion() throws Exception {
+        assertTrue(provider.getParameterOptions(uriI18N, "region", Locale.US).contains(expectedCntryEN));
+        assertTrue(provider.getParameterOptions(uriI18N, "region", Locale.FRENCH).contains(expectedCntryFR));
+        assertFalse(provider.getParameterOptions(uriI18N, "region", null).isEmpty());
+    }
+
+    @Test
+    public void testUnknownParameter() throws Exception {
+        assertNull(provider.getParameterOptions(uriI18N, "unknown", Locale.US));
+    }
+
+}

bundles/config/org.eclipse.smarthome.config.core/META-INF/MANIFEST.MF

@@ -15,6 +15,7 @@ Import-Package: com.google.common.base,
  org.eclipse.smarthome.core.i18n,
  org.osgi.framework,
  org.osgi.service.component,
+ org.osgi.service.component.annotations;resolution:=optional,
  org.slf4j
 Export-Package: org.eclipse.smarthome.config.core,
  org.eclipse.smarthome.config.core.dto,

bundles/config/org.eclipse.smarthome.config.core/OSGI-INF/.gitignore

@@ -0,0 +1 @@
+/org.eclipse.smarthome.config.core.internal.i18n.I18nConfigOptionsProvider.xml

bundles/config/org.eclipse.smarthome.config.core/src/main/java/org/eclipse/smarthome/config/core/ParameterOption.java

@@ -45,4 +45,42 @@ public String toString() {
         return this.getClass().getSimpleName() + " [value=\"" + value + "\", label=\"" + label + "\"]";
     }
 
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((label == null) ? 0 : label.hashCode());
+        result = prime * result + ((value == null) ? 0 : value.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        ParameterOption other = (ParameterOption) obj;
+        if (label == null) {
+            if (other.label != null) {
+                return false;
+            }
+        } else if (!label.equals(other.label)) {
+            return false;
+        }
+        if (value == null) {
+            if (other.value != null) {
+                return false;
+            }
+        } else if (!value.equals(other.value)) {
+            return false;
+        }
+        return true;
+    }
+
 }

bundles/config/org.eclipse.smarthome.config.core/src/main/java/org/eclipse/smarthome/config/core/internal/i18n/I18nConfigOptionsProvider.java

@@ -0,0 +1,51 @@
+/**
+ * Copyright (c) 2014-2017 by the respective copyright holders.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.eclipse.smarthome.config.core.internal.i18n;
+
+import java.net.URI;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Comparator;
+import java.util.Locale;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+import org.eclipse.smarthome.config.core.ConfigOptionProvider;
+import org.eclipse.smarthome.config.core.ParameterOption;
+import org.osgi.service.component.annotations.Component;
+
+/**
+ * {@link ConfigOptionProvider} that provides a list of
+ *
+ * @author Simon Kaufmann - initial contribution and API
+ *
+ */
+@Component(immediate = true)
+public class I18nConfigOptionsProvider implements ConfigOptionProvider {
+
+    @Override
+    public Collection<ParameterOption> getParameterOptions(URI uri, String param, Locale locale) {
+        if (uri.toString().equals("system:i18n")) {
+            Locale translation = locale != null ? locale : Locale.getDefault();
+            if (param.equals("language")) {
+                return getAvailable(locale, l -> new ParameterOption(l.getLanguage(), l.getDisplayLanguage(translation)));
+            } else if (param.equals("region")) {
+                return getAvailable(locale, l -> new ParameterOption(l.getCountry(), l.getDisplayCountry(translation)));
+            } else if (param.equals("variant")) {
+                return getAvailable(locale, l -> new ParameterOption(l.getVariant(), l.getDisplayVariant(translation)));
+            }
+        }
+        return null;
+    }
+
+    private Collection<ParameterOption> getAvailable(Locale locale, Function<Locale, ParameterOption> mapFunction) {
+        return Arrays.stream(Locale.getAvailableLocales()).map(l -> mapFunction.apply(l)).distinct()
+                .sorted(Comparator.comparing(a -> a.getLabel())).collect(Collectors.toList());
+    }
+
+}