[weaver-pojo] Implement first prototype of POJO weaving

tweed5-serde-extension/src/main/java/de/siphalor/tweed5/data/extension/api/TweedReaderWriterProvider.java

@@ -0,0 +1,48 @@
+package de.siphalor.tweed5.data.extension.api;
+
+import de.siphalor.tweed5.data.extension.api.readwrite.TweedEntryReaderWriter;
+import lombok.RequiredArgsConstructor;
+
+/**
+ * An interface that allows to register {@link TweedEntryReader}s and {@link TweedEntryWriter}s.
+ * Implementing classes should be Java services, e.g. using {@link com.google.auto.service.AutoService}.
+ */
+public interface TweedReaderWriterProvider {
+	void provideReaderWriters(ProviderContext context);
+
+	/**
+	 * The context where reader and writer factories may be registered.<br />
+	 * The reader and writer ids must be globally unique. It is therefore recommended to scope custom reader and writer ids in your own namespace (e.g. "de.siphalor.custom.blub")
+	 */
+	interface ProviderContext {
+		void registerReaderFactory(String id, ReaderWriterFactory<? extends TweedEntryReader<?, ?>> readerFactory);
+		void registerWriterFactory(String id, ReaderWriterFactory<? extends TweedEntryWriter<?, ?>> writerFactory);
+		default void registerReaderWriterFactory(String id, ReaderWriterFactory<? extends TweedEntryReaderWriter<?, ?>> readerWriterFactory) {
+			registerReaderFactory(id, readerWriterFactory);
+			registerWriterFactory(id, readerWriterFactory);
+		}
+	}
+
+	/**
+	 * A factory that creates a new reader or writer using delegate readers/writers as its arguments.
+	 * @param <T>
+	 */
+	@FunctionalInterface
+	interface ReaderWriterFactory<T> {
+		T create(T... delegateReaderWriters);
+	}
+
+	@RequiredArgsConstructor
+	final class StaticReaderWriterFactory<T> implements ReaderWriterFactory<T> {
+		private final T readerWriter;
+
+		@SafeVarargs
+		@Override
+		public final T create(T... delegateReaderWriters) {
+			if (delegateReaderWriters.length != 0) {
+				throw new IllegalArgumentException("Reader writer factory must not be passed any delegates as arguments");
+			}
+			return readerWriter;
+		}
+	}
+}

tweed5-serde-extension/src/main/java/de/siphalor/tweed5/data/extension/impl/DefaultTweedEntryReaderWriterImplsProvider.java

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+package de.siphalor.tweed5.data.extension.impl;
+
+import com.google.auto.service.AutoService;
+import de.siphalor.tweed5.data.extension.api.TweedReaderWriterProvider;
+
+import static de.siphalor.tweed5.data.extension.api.readwrite.TweedEntryReaderWriters.*;
+
+@AutoService(TweedReaderWriterProvider.class)
+public class DefaultTweedEntryReaderWriterImplsProvider implements TweedReaderWriterProvider {
+	@Override
+	public void provideReaderWriters(ProviderContext context) {
+		context.registerReaderWriterFactory("boolean", new StaticReaderWriterFactory<>(booleanReaderWriter()));
+		context.registerReaderWriterFactory("byte", new StaticReaderWriterFactory<>(byteReaderWriter()));
+		context.registerReaderWriterFactory("short", new StaticReaderWriterFactory<>(shortReaderWriter()));
+		context.registerReaderWriterFactory("int", new StaticReaderWriterFactory<>(intReaderWriter()));
+		context.registerReaderWriterFactory("long", new StaticReaderWriterFactory<>(longReaderWriter()));
+		context.registerReaderWriterFactory("float", new StaticReaderWriterFactory<>(floatReaderWriter()));
+		context.registerReaderWriterFactory("double", new StaticReaderWriterFactory<>(doubleReaderWriter()));
+		context.registerReaderWriterFactory("string", new StaticReaderWriterFactory<>(stringReaderWriter()));
+		context.registerReaderWriterFactory("coherent_collection", new StaticReaderWriterFactory<>(coherentCollectionReaderWriter()));
+		context.registerReaderWriterFactory("compound", new StaticReaderWriterFactory<>(compoundReaderWriter()));
+
+		context.registerReaderWriterFactory("nullable", delegateReaderWriters -> {
+			if (delegateReaderWriters.length != 1) {
+				throw new IllegalArgumentException("Nullable reader writer requires a single delegate argument, got " + delegateReaderWriters.length);
+			}
+			return nullableReaderWriter(delegateReaderWriters[0]);
+		});
+	}
+}