add component decoder

api/src/main/java/net/kyori/adventure/text/serializer/ComponentDecoder.java

@@ -0,0 +1,80 @@
+/*
+ * This file is part of adventure, licensed under the MIT License.
+ *
+ * Copyright (c) 2017-2023 KyoriPowered
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package net.kyori.adventure.text.serializer;
+
+import net.kyori.adventure.text.Component;
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * A {@link Component} decoder, which provides deserialization, but without serialization.
+ *
+ * <p>For both serialization and deserialization, use {@link ComponentSerializer}</p>
+ *
+ * @param <S> the serialized type
+ * @param <O> the output component type
+ * @since 4.16.0
+ */
+public interface ComponentDecoder<S, O extends Component> {
+  /**
+   * Deserialize a component from input of type {@code R}.
+   *
+   * @param input the input
+   * @return the component
+   * @since 4.16.0
+   */
+  @NotNull O deserialize(final @NotNull S input);
+
+  /**
+   * Deserialize a component from input of type {@code R}.
+   *
+   * <p>If {@code input} is {@code null}, then {@code null} will be returned.</p>
+   *
+   * @param input the input
+   * @return the component if {@code input} is non-null, otherwise {@code null}
+   * @since 4.16.0
+   */
+  @Contract(value = "!null -> !null; null -> null", pure = true)
+  default @Nullable O deserializeOrNull(final @Nullable S input) {
+    return this.deserializeOr(input, null);
+  }
+
+  /**
+   * Deserialize a component from input of type {@code R}.
+   *
+   * <p>If {@code input} is {@code null}, then {@code fallback} will be returned.</p>
+   *
+   * @param input the input
+   * @param fallback the fallback value
+   * @return the component if {@code input} is non-null, otherwise {@code fallback}
+   * @since 4.16.0
+   */
+  @Contract(value = "!null, _ -> !null; null, _ -> param2", pure = true)
+  default @Nullable O deserializeOr(final @Nullable S input, final @Nullable O fallback) {
+    if (input == null) return fallback;
+
+    return this.deserialize(input);
+  }
+}

api/src/main/java/net/kyori/adventure/text/serializer/ComponentSerializer.java

@@ -37,14 +37,15 @@
  * @param <R> the serialized type
  * @since 4.0.0
  */
-public interface ComponentSerializer<I extends Component, O extends Component, R> extends ComponentEncoder<I, R> {
+public interface ComponentSerializer<I extends Component, O extends Component, R> extends ComponentEncoder<I, R>, ComponentDecoder<R, O> {
   /**
    * Deserialize a component from input of type {@code R}.
    *
    * @param input the input
    * @return the component
    * @since 4.0.0
    */
+  @Override
   @NotNull O deserialize(final @NotNull R input);
 
   /**
@@ -61,7 +62,7 @@ public interface ComponentSerializer<I extends Component, O extends Component, R
   @Contract(value = "!null -> !null; null -> null", pure = true)
   @Deprecated
   default @Nullable O deseializeOrNull(final @Nullable R input) {
-    return this.deserializeOrNull(input);
+    return ComponentDecoder.super.deserializeOrNull(input);
   }
 
   /**
@@ -74,8 +75,9 @@ public interface ComponentSerializer<I extends Component, O extends Component, R
    * @since 4.8.0
    */
   @Contract(value = "!null -> !null; null -> null", pure = true)
+  @Override
   default @Nullable O deserializeOrNull(final @Nullable R input) {
-    return this.deserializeOr(input, null);
+    return ComponentDecoder.super.deserializeOr(input, null);
   }
 
   /**
@@ -89,10 +91,9 @@ public interface ComponentSerializer<I extends Component, O extends Component, R
    * @since 4.7.0
    */
   @Contract(value = "!null, _ -> !null; null, _ -> param2", pure = true)
+  @Override
   default @Nullable O deserializeOr(final @Nullable R input, final @Nullable O fallback) {
-    if (input == null) return fallback;
-
-    return this.deserialize(input);
+    return ComponentDecoder.super.deserializeOr(input, fallback);
   }
 
   /**