Correctly parse property name in path "map[key[foo]]"

spring-beans/src/main/java/org/springframework/beans/AbstractNestablePropertyAccessor.java

@@ -933,7 +933,7 @@ public abstract class AbstractNestablePropertyAccessor extends AbstractPropertyA
 			int keyStart = propertyName.indexOf(PROPERTY_KEY_PREFIX, searchIndex);
 			searchIndex = -1;
 			if (keyStart != -1) {
-				int keyEnd = propertyName.indexOf(PROPERTY_KEY_SUFFIX, keyStart + PROPERTY_KEY_PREFIX.length());
+				int keyEnd = getPropertyNameKeyEnd(propertyName, keyStart + PROPERTY_KEY_PREFIX.length());
 				if (keyEnd != -1) {
 					if (actualName == null) {
 						actualName = propertyName.substring(0, keyStart);
@@ -958,6 +958,29 @@ public abstract class AbstractNestablePropertyAccessor extends AbstractPropertyA
 		return tokens;
 	}
 
+	private static int getPropertyNameKeyEnd(String propertyName, int startIndex) {
+		int unclosedPrefixes = 0;
+		int length = propertyName.length();
+		for (int i = startIndex; i < length; i++) {
+			switch (propertyName.charAt(i)) {
+				case PropertyAccessor.PROPERTY_KEY_PREFIX_CHAR:
+					// The property name contains opening prefix(es)
+					unclosedPrefixes++;
+					break;
+				case PropertyAccessor.PROPERTY_KEY_SUFFIX_CHAR:
+					if (unclosedPrefixes == 0) {
+						// No unclosed prefix(es) in the property name (left), this is the suffix we are looking for
+						return i;
+					} else {
+						// This suffix does not close the initial prefix, but one that occurred within the property name
+						unclosedPrefixes--;
+					}
+					break;
+			}
+		}
+		return -1;
+	}
+
 	@Override
 	public String toString() {
 		StringBuilder sb = new StringBuilder(getClass().getName());

spring-beans/src/test/java/org/springframework/beans/AbstractPropertyAccessorTests.java

@@ -1599,6 +1599,7 @@ public abstract class AbstractPropertyAccessorTests {
 		TestBean tb7 = ((TestBean) target.getSet().toArray()[1]);
 		TestBean tb4 = ((TestBean) target.getMap().get("key1"));
 		TestBean tb5 = ((TestBean) target.getMap().get("key.3"));
+		TestBean tb8 = ((TestBean) target.getMap().get("key5[foo]"));
 		assertEquals("name0", tb0.getName());
 		assertEquals("name1", tb1.getName());
 		assertEquals("name2", tb2.getName());
@@ -1607,6 +1608,7 @@ public abstract class AbstractPropertyAccessorTests {
 		assertEquals("name7", tb7.getName());
 		assertEquals("name4", tb4.getName());
 		assertEquals("name5", tb5.getName());
+		assertEquals("name8", tb8.getName());
 		assertEquals("name0", accessor.getPropertyValue("array[0].name"));
 		assertEquals("name1", accessor.getPropertyValue("array[1].name"));
 		assertEquals("name2", accessor.getPropertyValue("list[0].name"));
@@ -1619,6 +1621,9 @@ public abstract class AbstractPropertyAccessorTests {
 		assertEquals("name5", accessor.getPropertyValue("map[\"key.3\"].name"));
 		assertEquals("nameX", accessor.getPropertyValue("map[key4][0].name"));
 		assertEquals("nameY", accessor.getPropertyValue("map[key4][1].name"));
+		assertEquals("name8", accessor.getPropertyValue("map[key5[foo]].name"));
+		assertEquals("name8", accessor.getPropertyValue("map['key5[foo]'].name"));
+		assertEquals("name8", accessor.getPropertyValue("map[\"key5[foo]\"].name"));
 
 		MutablePropertyValues pvs = new MutablePropertyValues();
 		pvs.add("array[0].name", "name5");
@@ -1631,6 +1636,7 @@ public abstract class AbstractPropertyAccessorTests {
 		pvs.add("map['key.3'].name", "name0");
 		pvs.add("map[key4][0].name", "nameA");
 		pvs.add("map[key4][1].name", "nameB");
+		pvs.add("map[key5[foo]].name", "name10");
 		accessor.setPropertyValues(pvs);
 		assertEquals("name5", tb0.getName());
 		assertEquals("name4", tb1.getName());
@@ -1648,6 +1654,7 @@ public abstract class AbstractPropertyAccessorTests {
 		assertEquals("name0", accessor.getPropertyValue("map['key.3'].name"));
 		assertEquals("nameA", accessor.getPropertyValue("map[key4][0].name"));
 		assertEquals("nameB", accessor.getPropertyValue("map[key4][1].name"));
+		assertEquals("name10", accessor.getPropertyValue("map[key5[foo]].name"));
 	}
 
 	@Test

spring-beans/src/test/java/org/springframework/tests/sample/beans/IndexedTestBean.java

@@ -66,6 +66,7 @@ public class IndexedTestBean {
 		TestBean tb5 = new TestBean("name5", 0);
 		TestBean tb6 = new TestBean("name6", 0);
 		TestBean tb7 = new TestBean("name7", 0);
+		TestBean tb8 = new TestBean("name8", 0);
 		TestBean tbX = new TestBean("nameX", 0);
 		TestBean tbY = new TestBean("nameY", 0);
 		this.array = new TestBean[] {tb0, tb1};
@@ -83,6 +84,7 @@ public class IndexedTestBean {
 		list.add(tbX);
 		list.add(tbY);
 		this.map.put("key4", list);
+		this.map.put("key5[foo]", tb8);
 	}