SPR-5847: require quotes for dotted map key names, eg. map['a.b.c']

org.springframework.expression/src/main/java/org/springframework/expression/spel/ast/Indexer.java

@@ -57,8 +57,15 @@ public class Indexer extends SpelNodeImpl {
 			index = reference.getName();
 			indexValue = new TypedValue(index,CommonTypeDescriptors.STRING_TYPE_DESCRIPTOR);
 		} else {
+			// In case the map key is unqualified, we want it evaluated against the root object so 
+			// temporarily push that on whilst evaluating the key
+			try {
+				state.pushActiveContextObject(state.getRootContextObject());
 				indexValue = children[0].getValueInternal(state);
 				index = indexValue.getValue();
+			} finally {
+				state.popActiveContextObject();
+			}
 		}
 
 		// Indexing into a Map

org.springframework.expression/src/test/java/org/springframework/expression/spel/SpringEL300Tests.java

@@ -152,17 +152,35 @@ public class SpringEL300Tests extends ExpressionTestCase {
 		name = expr.getValue(eContext,String.class);
 		Assert.assertEquals("Dave",name);
 
+		// MapAccessor required for this to work
 		expr = new SpelExpressionParser().parse("jdbcProperties.username");
 		eContext.addPropertyAccessor(new MapAccessor());
 		name = expr.getValue(eContext,String.class);
 		Assert.assertEquals("Dave",name);
+		
+		// --- dotted property names
+
+		// lookup foo on the root, then bar on that, then use that as the key into jdbcProperties
+		expr = new SpelExpressionParser().parse("jdbcProperties[foo.bar]"); 
+		eContext.addPropertyAccessor(new MapAccessor());
+		name = expr.getValue(eContext,String.class);
+		Assert.assertEquals("Dave2",name);
+
+		// key is foo.bar
+		expr = new SpelExpressionParser().parse("jdbcProperties['foo.bar']");
+		eContext.addPropertyAccessor(new MapAccessor());
+		name = expr.getValue(eContext,String.class);
+		Assert.assertEquals("Elephant",name);	
 	}
 	
 	static class TestProperties {
 		public Properties jdbcProperties = new Properties();
+		public Properties foo = new Properties();
 		TestProperties() {
 			jdbcProperties.put("username","Dave");
-			jdbcProperties.put("foo.bar","Dave");
+			jdbcProperties.put("alias","Dave2");
+			jdbcProperties.put("foo.bar","Elephant");
+			foo.put("bar","alias");
 		}
 	}