From 4085c975934aa2df85717e3010b90f9630e1692c Mon Sep 17 00:00:00 2001
From: Looly <loolly@gmail.com>
Date: Tue, 5 Jul 2022 21:27:51 +0800
Subject: [PATCH] add methods

---
 CHANGELOG.md                                  |  4 +-
 .../copier/provider/BeanValueProvider.java    | 97 +++++++++++++++++++
 2 files changed, 100 insertions(+), 1 deletion(-)
 create mode 100644 hutool-core/src/main/java/cn/hutool/core/bean/copier/provider/BeanValueProvider.java

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f923c679d..8d597b6df 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,11 +3,13 @@
 
 -------------------------------------------------------------------------------------------------------------
 
-# 5.8.5.M1 (2022-06-30)
+# 5.8.5.M1 (2022-07-05)
 
 ### 🐣新特性
 * 【core   】     NumberUtil新增isIn方法（pr#669@Gitee）
 * 【core   】     修复注解工具类getAnnotations的NPE问题，注解扫描器添新功能（pr#671@Gitee）
+* 【core   】     合成注解SyntheticAnnotation提取为接口，并为实现类添加注解选择器和属性处理器（pr#678@Gitee）
+* 【core   】     增加BeanValueProvider（issue#I5FBHV@Gitee）
 * 
 ### 🐞Bug修复
 
diff --git a/hutool-core/src/main/java/cn/hutool/core/bean/copier/provider/BeanValueProvider.java b/hutool-core/src/main/java/cn/hutool/core/bean/copier/provider/BeanValueProvider.java
new file mode 100644
index 000000000..9b0d6e956
--- /dev/null
+++ b/hutool-core/src/main/java/cn/hutool/core/bean/copier/provider/BeanValueProvider.java
@@ -0,0 +1,97 @@
+package cn.hutool.core.bean.copier.provider;
+
+import cn.hutool.core.bean.BeanUtil;
+import cn.hutool.core.bean.PropDesc;
+import cn.hutool.core.bean.copier.ValueProvider;
+import cn.hutool.core.lang.Editor;
+import cn.hutool.core.map.FuncKeyMap;
+import cn.hutool.core.util.StrUtil;
+
+import java.lang.reflect.Type;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Bean的值提供者
+ *
+ * @author looly
+ */
+public class BeanValueProvider implements ValueProvider<String> {
+
+	private final Object source;
+	private final boolean ignoreError;
+	final Map<String, PropDesc> sourcePdMap;
+
+	/**
+	 * 构造
+	 *
+	 * @param bean        Bean
+	 * @param ignoreCase  是否忽略字段大小写
+	 * @param ignoreError 是否忽略字段值读取错误
+	 */
+	public BeanValueProvider(Object bean, boolean ignoreCase, boolean ignoreError) {
+		this(bean, ignoreCase, ignoreError, null);
+	}
+
+	/**
+	 * 构造
+	 *
+	 * @param bean        Bean
+	 * @param ignoreCase  是否忽略字段大小写
+	 * @param ignoreError 是否忽略字段值读取错误
+	 * @param keyEditor   键编辑器
+	 */
+	public BeanValueProvider(Object bean, boolean ignoreCase, boolean ignoreError, Editor<String> keyEditor) {
+		this.source = bean;
+		this.ignoreError = ignoreError;
+		final Map<String, PropDesc> sourcePdMap = BeanUtil.getBeanDesc(source.getClass()).getPropMap(ignoreCase);
+		// issue#2202@Github
+		// 如果用户定义了键编辑器，则提供的map中的数据必须全部转换key
+		this.sourcePdMap = new FuncKeyMap<>(new HashMap<>(sourcePdMap.size(), 1), (key) -> {
+			if (ignoreCase && key instanceof CharSequence) {
+				key = key.toString().toLowerCase();
+			}
+			if (null != keyEditor) {
+				key = keyEditor.edit(key.toString());
+			}
+			return key.toString();
+		});
+		this.sourcePdMap.putAll(sourcePdMap);
+	}
+
+	@Override
+	public Object value(String key, Type valueType) {
+		final PropDesc sourcePd = getPropDesc(key, valueType);
+
+		Object result = null;
+		if (null != sourcePd) {
+			result = sourcePd.getValue(this.source, valueType, this.ignoreError);
+		}
+		return result;
+	}
+
+	@Override
+	public boolean containsKey(String key) {
+		final PropDesc sourcePd = getPropDesc(key, null);
+
+		// 字段描述不存在或忽略读的情况下，表示不存在
+		return null != sourcePd && sourcePd.isReadable(false);
+	}
+
+	/**
+	 * 获得属性描述
+	 *
+	 * @param key       字段名
+	 * @param valueType 值类型，用于判断是否为Boolean，可以为null
+	 * @return 属性描述
+	 */
+	private PropDesc getPropDesc(String key, Type valueType) {
+		PropDesc sourcePd = sourcePdMap.get(key);
+		if (null == sourcePd && (null == valueType || Boolean.class == valueType || boolean.class == valueType)) {
+			//boolean类型字段字段名支持两种方式
+			sourcePd = sourcePdMap.get(StrUtil.upperFirstAndAddPre(key, "is"));
+		}
+
+		return sourcePd;
+	}
+}