Fix error handling for deserializers

Signed-off-by: Jacob Laursen <[email protected]>

bundles/org.openhab.binding.energidataservice/src/main/java/org/openhab/binding/energidataservice/internal/api/serialization/InstantDeserializer.java

@@ -14,6 +14,7 @@
 
 import java.lang.reflect.Type;
 import java.time.Instant;
+import java.time.format.DateTimeParseException;
 
 import org.eclipse.jdt.annotation.NonNullByDefault;
 import org.eclipse.jdt.annotation.Nullable;
@@ -35,8 +36,12 @@ public class InstantDeserializer implements JsonDeserializer<Instant> {
     public @Nullable Instant deserialize(JsonElement element, Type arg1, JsonDeserializationContext arg2)
             throws JsonParseException {
         String content = element.getAsString();
-        // When writing this, the format of the provided UTC strings lacks the trailing 'Z'.
-        // In case this would be fixed in the future, gracefully support both with and without this.
-        return Instant.parse(content.endsWith("Z") ? content : content + "Z");
+        try {
+            // When writing this, the format of the provided UTC strings lacks the trailing 'Z'.
+            // In case this would be fixed in the future, gracefully support both with and without this.
+            return Instant.parse(content.endsWith("Z") ? content : content + "Z");
+        } catch (DateTimeParseException e) {
+            throw new JsonParseException("Could not parse as Instant: " + content, e);
+        }
     }
 }

bundles/org.openhab.binding.energidataservice/src/main/java/org/openhab/binding/energidataservice/internal/api/serialization/LocalDateDeserializer.java

@@ -14,6 +14,7 @@
 
 import java.lang.reflect.Type;
 import java.time.LocalDate;
+import java.time.format.DateTimeParseException;
 
 import org.eclipse.jdt.annotation.NonNullByDefault;
 import org.eclipse.jdt.annotation.Nullable;
@@ -34,6 +35,10 @@ public class LocalDateDeserializer implements JsonDeserializer<LocalDate> {
     @Override
     public @Nullable LocalDate deserialize(JsonElement element, Type arg1, JsonDeserializationContext arg2)
             throws JsonParseException {
-        return LocalDate.parse(element.getAsString().substring(0, 10));
+        try {
+            return LocalDate.parse(element.getAsString().substring(0, 10));
+        } catch (DateTimeParseException e) {
+            throw new JsonParseException("Could not parse as LocalDate: " + element.getAsString(), e);
+        }
     }
 }

bundles/org.openhab.binding.energidataservice/src/main/java/org/openhab/binding/energidataservice/internal/api/serialization/LocalDateTimeDeserializer.java

@@ -14,6 +14,7 @@
 
 import java.lang.reflect.Type;
 import java.time.LocalDateTime;
+import java.time.format.DateTimeParseException;
 
 import org.eclipse.jdt.annotation.NonNullByDefault;
 import org.eclipse.jdt.annotation.Nullable;
@@ -34,6 +35,10 @@ public class LocalDateTimeDeserializer implements JsonDeserializer<LocalDateTime
     @Override
     public @Nullable LocalDateTime deserialize(JsonElement element, Type arg1, JsonDeserializationContext arg2)
             throws JsonParseException {
-        return LocalDateTime.parse(element.getAsString());
+        try {
+            return LocalDateTime.parse(element.getAsString());
+        } catch (DateTimeParseException e) {
+            throw new JsonParseException("Could not parse as LocalDateTime: " + element.getAsString(), e);
+        }
     }
 }

bundles/org.openhab.binding.energidataservice/src/test/java/org/openhab/binding/energidataservice/internal/api/serialization/InstantDeserializerTest.java

@@ -0,0 +1,58 @@
+/**
+ * Copyright (c) 2010-2023 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.binding.energidataservice.internal.api.serialization;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.is;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import java.time.Instant;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonParseException;
+
+/**
+ * Tests for {@link InstantDeserializer}.
+ * 
+ * @author Jacob Laursen - Initial contribution
+ */
+@NonNullByDefault
+@ExtendWith(MockitoExtension.class)
+public class InstantDeserializerTest {
+
+    private final Gson gson = new GsonBuilder().registerTypeAdapter(Instant.class, new InstantDeserializer()).create();
+
+    @Test
+    void instantWhenInvalidShouldThrowJsonParseException() {
+        assertThrows(JsonParseException.class, () -> {
+            gson.fromJson("\"invalid\"", Instant.class);
+        });
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = { "\"2023-04-17T20:38:01Z\"", "\"2023-04-17T20:38:01\"" })
+    void instantWhenValidShouldParse(String input) {
+        assertThat((@Nullable Instant) gson.fromJson(input, Instant.class),
+                is(equalTo(Instant.ofEpochSecond(1681763881))));
+    }
+}

bundles/org.openhab.binding.energidataservice/src/test/java/org/openhab/binding/energidataservice/internal/api/serialization/LocalDateDeserializerTest.java

@@ -0,0 +1,56 @@
+/**
+ * Copyright (c) 2010-2023 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.binding.energidataservice.internal.api.serialization;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.is;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import java.time.LocalDateTime;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonParseException;
+
+/**
+ * Tests for {@link LocalDateDeserializer}.
+ * 
+ * @author Jacob Laursen - Initial contribution
+ */
+@NonNullByDefault
+@ExtendWith(MockitoExtension.class)
+public class LocalDateDeserializerTest {
+
+    private final Gson gson = new GsonBuilder()
+            .registerTypeAdapter(LocalDateTime.class, new LocalDateTimeDeserializer()).create();
+
+    @Test
+    void localDateTimeWhenInvalidShouldThrowJsonParseException() {
+        assertThrows(JsonParseException.class, () -> {
+            gson.fromJson("\"invalid\"", LocalDateTime.class);
+        });
+    }
+
+    @Test
+    void instantWhenValidShouldParse() {
+        assertThat((@Nullable LocalDateTime) gson.fromJson("\"2023-04-17T20:38:01\"", LocalDateTime.class),
+                is(equalTo(LocalDateTime.of(2023, 4, 17, 20, 38, 1, 0))));
+    }
+}