Refactor RPC handling (#2610)

Removed endpoints from ControllerApiBackend (edge --> backend):
 - UpdateUserLanguage (Threw error NotImplemented)
 - UpdateUserSettings (Threw error NotImplemented)

Added endpoint to RestApi:
 - queryHistoricTimeseriesEnergyPerPeriod
 - queryHistoricTimeseriesExportXlxs

Reviewed-by: Hueseyin Sahutoglu <34771592+huseyinsaht@users.noreply.github.com>
Co-authored-by: Michael Grill <59126309+michaelgrill@users.noreply.github.com>

cnf/checkstyle.xml

@@ -132,7 +132,7 @@
       <message key="name.invalidPattern" value="Method type name ''{0}'' must match pattern ''{1}''."/>
     </module>
     <module name="InterfaceTypeParameterName">
-      <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+      <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]$)"/>
       <message key="name.invalidPattern" value="Interface type name ''{0}'' must match pattern ''{1}''."/>
     </module>
     <module name="NoFinalizer"/>

io.openems.common/src/io/openems/common/exceptions/OpenemsRuntimeException.java

@@ -0,0 +1,28 @@
+package io.openems.common.exceptions;
+
+public class OpenemsRuntimeException extends RuntimeException {
+
+	private static final long serialVersionUID = -4509666272212124910L;
+
+	public OpenemsRuntimeException() {
+		super();
+	}
+
+	public OpenemsRuntimeException(String message, Throwable cause, boolean enableSuppression,
+			boolean writableStackTrace) {
+		super(message, cause, enableSuppression, writableStackTrace);
+	}
+
+	public OpenemsRuntimeException(String message, Throwable cause) {
+		super(message, cause);
+	}
+
+	public OpenemsRuntimeException(String message) {
+		super(message);
+	}
+
+	public OpenemsRuntimeException(Throwable cause) {
+		super(cause);
+	}
+
+}

io.openems.common/src/io/openems/common/jsonrpc/serialization/JsonArrayPath.java

@@ -0,0 +1,39 @@
+package io.openems.common.jsonrpc.serialization;
+
+import java.util.List;
+import java.util.function.Function;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+public interface JsonArrayPath extends JsonPath {
+
+	/**
+	 * Gets the elements as a list parsed to the object.
+	 * 
+	 * @param <T>    the type of the objects
+	 * @param mapper the {@link JsonElement} to object mapper
+	 * @return the list with the parsed values
+	 */
+	public <T> List<T> getAsList(Function<JsonElementPath, T> mapper);
+
+	/**
+	 * Gets the elements as a list parsed to the object.
+	 * 
+	 * @param <T>        the type of the objects
+	 * @param serializer the {@link JsonSerializer} to deserialize the elements
+	 * @return the list with the parsed values
+	 */
+	public default <T> List<T> getAsList(JsonSerializer<T> serializer) {
+		return this.getAsList(serializer::deserializePath);
+	}
+
+	/**
+	 * Gets the current element of the path.
+	 * 
+	 * @return the {@link JsonObject}
+	 */
+	public JsonArray get();
+
+}

io.openems.common/src/io/openems/common/jsonrpc/serialization/JsonArrayPathActual.java

@@ -0,0 +1,36 @@
+package io.openems.common.jsonrpc.serialization;
+
+import java.util.List;
+import java.util.function.Function;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+
+import io.openems.common.exceptions.OpenemsRuntimeException;
+import io.openems.common.utils.JsonUtils;
+
+public class JsonArrayPathActual implements JsonArrayPath {
+
+	private final JsonArray object;
+
+	public JsonArrayPathActual(JsonElement object) {
+		if (!object.isJsonArray()) {
+			throw new OpenemsRuntimeException(object + " is not a JsonArray!");
+		}
+		this.object = object.getAsJsonArray();
+	}
+
+	@Override
+	public <T> List<T> getAsList(Function<JsonElementPath, T> mapper) {
+		return JsonUtils.stream(this.object) //
+				.map(JsonElementPathActual::new) //
+				.map(mapper) //
+				.toList();
+	}
+
+	@Override
+	public JsonArray get() {
+		return this.object;
+	}
+
+}

io.openems.common/src/io/openems/common/jsonrpc/serialization/JsonArrayPathDummy.java

@@ -0,0 +1,38 @@
+package io.openems.common.jsonrpc.serialization;
+
+import static java.util.Collections.emptyList;
+
+import java.util.List;
+import java.util.function.Function;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+
+import io.openems.common.utils.JsonUtils;
+
+public class JsonArrayPathDummy implements JsonArrayPath, JsonPathDummy {
+
+	private JsonPathDummy elementType;
+
+	@Override
+	public <T> List<T> getAsList(Function<JsonElementPath, T> mapper) {
+		final var path = new JsonElementPathDummy();
+		mapper.apply(path);
+		this.elementType = path;
+		return emptyList();
+	}
+
+	@Override
+	public JsonArray get() {
+		return new JsonArray();
+	}
+
+	@Override
+	public JsonElement buildPath() {
+		return JsonUtils.buildJsonObject() //
+				.addProperty("type", "array") //
+				.onlyIf(this.elementType != null, t -> t.add("elementType", this.elementType.buildPath())) //
+				.build();
+	}
+
+}

io.openems.common/src/io/openems/common/jsonrpc/serialization/JsonElementPath.java

@@ -0,0 +1,48 @@
+package io.openems.common.jsonrpc.serialization;
+
+import com.google.gson.JsonElement;
+
+public interface JsonElementPath extends JsonPath {
+
+	/**
+	 * Gets the current {@link JsonElementPath} as a {@link JsonObjectPath}.
+	 * 
+	 * @return the current element as a {@link JsonObjectPath}
+	 */
+	public JsonObjectPath getAsJsonObjectPath();
+
+	/**
+	 * Gets the current {@link JsonElementPath} as a {@link JsonArrayPath}.
+	 * 
+	 * @return the current element as a {@link JsonArrayPath}
+	 */
+	public JsonArrayPath getAsJsonArrayPath();
+
+	/**
+	 * Gets the current {@link JsonElementPath} as a {@link StringPath}.
+	 * 
+	 * @return the current element as a {@link StringPath}
+	 */
+	public StringPath getAsStringPath();
+
+	/**
+	 * Gets the current {@link JsonElementPath} as a {@link String}.
+	 * 
+	 * @return the current element as a {@link String}
+	 */
+	public default String getAsString() {
+		return this.getAsStringPath().get();
+	}
+
+	/**
+	 * Gets the current {@link JsonElementPath} as a Object serialized with the
+	 * provided {@link JsonSerializer}.
+	 * 
+	 * @param <O>        the type of the final object
+	 * @param serializer the {@link JsonSerializer} to deserialize the
+	 *                   {@link JsonElement} to the object
+	 * @return the current element as a {@link StringPath}
+	 */
+	public <O> O getAsObject(JsonSerializer<O> serializer);
+
+}

io.openems.common/src/io/openems/common/jsonrpc/serialization/JsonElementPathActual.java

@@ -0,0 +1,32 @@
+package io.openems.common.jsonrpc.serialization;
+
+import com.google.gson.JsonElement;
+
+public class JsonElementPathActual implements JsonElementPath {
+	private final JsonElement element;
+
+	public JsonElementPathActual(JsonElement element) {
+		this.element = element;
+	}
+
+	@Override
+	public JsonArrayPath getAsJsonArrayPath() {
+		return new JsonArrayPathActual(this.element);
+	}
+
+	@Override
+	public JsonObjectPath getAsJsonObjectPath() {
+		return new JsonObjectPathActual(this.element);
+	}
+
+	@Override
+	public StringPath getAsStringPath() {
+		return new StringPathActual(this.element);
+	}
+
+	@Override
+	public <O> O getAsObject(JsonSerializer<O> deserializer) {
+		return deserializer.deserializePath(new JsonElementPathActual(this.element));
+	}
+
+}

io.openems.common/src/io/openems/common/jsonrpc/serialization/JsonElementPathDummy.java

@@ -0,0 +1,49 @@
+package io.openems.common.jsonrpc.serialization;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonNull;
+
+public class JsonElementPathDummy implements JsonElementPath, JsonPathDummy {
+
+	private JsonPathDummy dummyPath;
+
+	@Override
+	public JsonArrayPath getAsJsonArrayPath() {
+		return this.withDummyPath(new JsonArrayPathDummy());
+	}
+
+	@Override
+	public JsonObjectPath getAsJsonObjectPath() {
+		return this.withDummyPath(new JsonObjectPathDummy());
+	}
+
+	@Override
+	public StringPath getAsStringPath() {
+		return this.withDummyPath(new StringPathDummy());
+	}
+
+	@Override
+	public <O> O getAsObject(JsonSerializer<O> deserializer) {
+		final var dummyPath = new JsonElementPathDummy();
+		this.withDummyPath(dummyPath);
+		return deserializer.deserializePath(dummyPath);
+	}
+
+	private <T extends JsonPathDummy> T withDummyPath(T path) {
+		if (this.dummyPath != null) {
+			throw new RuntimeException("Path already set");
+		}
+		this.dummyPath = path;
+		return path;
+	}
+
+	public JsonPathDummy getDummyPath() {
+		return this.dummyPath;
+	}
+
+	@Override
+	public JsonElement buildPath() {
+		return this.dummyPath == null ? JsonNull.INSTANCE : this.dummyPath.buildPath();
+	}
+
+}