init: 仓库初始化.

src/main/java/com/serliunx/statemanagement/manager/DefaultUnidirectionalStateManager.java

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+package com.serliunx.statemanagement.manager;
+
+import java.util.List;
+
+/**
+ * 单向流转的状态管理器的默认实现
+ *
+ * @author <a href="mailto:serliunx@yeah.net">SerLiunx</a>
+ * @version 1.0.0
+ * @since 2024/12/28
+ */
+public class DefaultUnidirectionalStateManager<S> extends AbstractStateManager<S>
+		implements UnidirectionalStateManager<S> {
+
+	/**
+	 * @param stateList 状态列表
+	 */
+	public DefaultUnidirectionalStateManager(List<S> stateList) {
+		super(stateList);
+	}
+
+	/**
+	 * @param states 状态数组
+	 */
+	public DefaultUnidirectionalStateManager(S[] states) {
+		super(states);
+	}
+
+	@Override
+	public S switchNextAndGet() {
+		try {
+			writeLock.lock();
+			next();
+			return get();
+		} finally {
+			writeLock.unlock();
+		}
+	}
+
+	@Override
+	public S getAndSwitchNext() {
+		try {
+			writeLock.lock();
+			S current = get();
+			next();
+			return current;
+		} finally {
+			writeLock.unlock();
+		}
+	}
+
+	@Override
+	public void switchNext() {
+		try {
+			writeLock.lock();
+			next();
+		} finally {
+			writeLock.unlock();
+		}
+	}
+
+	@Override
+	public boolean switchTo(S state) {
+		try {
+			writeLock.lock();
+			final int i;
+			if ((i = indexOf(state)) == -1 ||
+					(!isLast() && i < currentIndex()) ||
+					(isLast() && i != getDefault())) {
+				return false;
+			}
+			updateCurrentIndex(i);
+		} finally {
+			writeLock.unlock();
+		}
+		return true;
+	}
+
+	/**
+	 * 保留默认的切换方式供子类使用
+	 */
+	protected boolean defaultSwitchTo(S state) {
+		return super.switchTo(state);
+	}
+}