feat(ContainerProvider): add PartitionContainerProvider (GitHub #122)

crane4j-core/src/main/java/cn/crane4j/core/container/PartitionContainerProvider.java

@@ -0,0 +1,65 @@
+package cn.crane4j.core.container;
+
+import lombok.Setter;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Function;
+
+/**
+ * <p>A {@link ContainerProvider} implementation for conveniently registering container.<br/>
+ * When get container by given namespace, it will return the container registered by {@link #registerContainer(Container)},
+ * if not exist, it will return the container created by {@link #defaultContainerFactory}.
+ *
+ * @author huangchengxing
+ */
+public class PartitionContainerProvider implements ContainerProvider {
+
+    /**
+     * Container map.
+     */
+    private final Map<String, Container<Object>> containerMap = new HashMap<>();
+
+    /**
+     * Default container factory for non-existent container.
+     */
+    @NonNull
+    @Setter
+    private Function<String, Container<Object>> defaultContainerFactory = namespace -> Containers.empty();
+
+    /**
+     * Get container comparator by given namespace
+     *
+     * @param namespace namespace of container
+     * @return container comparator
+     */
+    @SuppressWarnings("unchecked")
+    @Override
+    public @Nullable <K> Container<K> getContainer(String namespace) {
+        return (Container<K>)containerMap.getOrDefault(namespace, defaultContainerFactory.apply(namespace));
+    }
+
+    /**
+     * Register container.
+     *
+     * @param container container
+     */
+    public void registerContainer(@NonNull Container<Object> container) {
+        Objects.requireNonNull(container, "Container must not null");
+        containerMap.put(container.getNamespace(), container);
+    }
+
+    /**
+     * Whether this provider has container of given {@code namespace}.
+     *
+     * @param namespace namespace
+     * @return boolean
+     */
+    @Override
+    public boolean containsContainer(String namespace) {
+        return Objects.nonNull(getContainer(namespace));
+    }
+}

crane4j-core/src/main/java/cn/crane4j/core/parser/handler/AbstractAssembleAnnotationHandler.java

@@ -20,8 +20,10 @@
 import cn.crane4j.core.util.ReflectUtils;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
+import lombok.Setter;
 import lombok.experimental.Accessors;
 import lombok.extern.slf4j.Slf4j;
+import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 import java.lang.annotation.Annotation;
@@ -51,11 +53,13 @@ public abstract class AbstractAssembleAnnotationHandler<T extends Annotation> im
 
     protected final Class<T> annotationType;
     protected final AnnotationFinder annotationFinder;
-    protected final Comparator<KeyTriggerOperation> operationComparator;
+    @NonNull
+    @Setter
+    protected Comparator<KeyTriggerOperation> operationComparator;
     protected final Crane4jGlobalConfiguration globalConfiguration;
 
     /**
-     * Create an {@link AbstractAssembleAnnotationHandler} comparator.
+     * Create an {@link AbstractAssembleAnnotationHandler} instance.
      *
      * @param annotationType annotation type
      * @param annotationFinder annotation finder
@@ -64,13 +68,25 @@ public abstract class AbstractAssembleAnnotationHandler<T extends Annotation> im
      */
     protected AbstractAssembleAnnotationHandler(
         Class<T> annotationType, AnnotationFinder annotationFinder,
-        Comparator<KeyTriggerOperation> operationComparator, Crane4jGlobalConfiguration globalConfiguration) {
+        @NonNull Comparator<KeyTriggerOperation> operationComparator, Crane4jGlobalConfiguration globalConfiguration) {
         this.annotationType = annotationType;
         this.annotationFinder = annotationFinder;
         this.operationComparator = operationComparator;
         this.globalConfiguration = globalConfiguration;
     }
 
+    /**
+     * Create an {@link AbstractAssembleAnnotationHandler} instance.
+     *
+     * @param annotationType annotation type
+     * @param annotationFinder annotation finder
+     * @param globalConfiguration global configuration
+     */
+    protected AbstractAssembleAnnotationHandler(
+        Class<T> annotationType, AnnotationFinder annotationFinder, Crane4jGlobalConfiguration globalConfiguration) {
+        this(annotationType, annotationFinder, Crane4jGlobalSorter.comparator(), globalConfiguration);
+    }
+
     /**
      * Resolve operations from type
      *