DATAJPA-545 - Fixed regression in discovery of StringQuery parameters.

Special characters like french accents (e.g., abonnés) were not allowed anymore (was in SD JPA 1.2) in named parameter bindings. Adjusted regex in StringQuery to cover a broader list of characters.

Original pull request: #93.

src/main/java/org/springframework/data/jpa/repository/query/StringQuery.java

@@ -165,7 +165,7 @@ class StringQuery {
 			builder.append("(");
 			builder.append("%?(\\?(\\d+))%?"); // position parameter
 			builder.append("|"); // or
-			builder.append("%?(:(\\w+))%?"); // named parameter;
+			builder.append("%?(:([\\p{L}\\w]+))%?"); // named parameter;
 			builder.append(")");
 			builder.append("\\)?"); // optional braces around paramters
 

src/test/java/org/springframework/data/jpa/repository/query/StringQueryUnitTests.java

@@ -246,6 +246,62 @@ public class StringQueryUnitTests {
 		query.getBindingFor(null);
 	}
 
+	/**
+	 * @see DATAJPA-545
+	 */
+	@Test
+	public void detectsInBindingWithSpecialFrenchCharactersInParentheses() {
+
+		StringQuery query = new StringQuery("select * from MyEntity where abonnés in (:abonnés)");
+
+		List<ParameterBinding> bindings = query.getParameterBindings();
+
+		assertThat(bindings, hasSize(1));
+		assertNamedBinding(InParameterBinding.class, "abonnés", bindings.get(0));
+	}
+
+	/**
+	 * @see DATAJPA-545
+	 */
+	@Test
+	public void detectsInBindingWithSpecialCharactersInParentheses() {
+
+		StringQuery query = new StringQuery("select * from MyEntity where øre in (:øre)");
+
+		List<ParameterBinding> bindings = query.getParameterBindings();
+
+		assertThat(bindings, hasSize(1));
+		assertNamedBinding(InParameterBinding.class, "øre", bindings.get(0));
+	}
+
+	/**
+	 * @see DATAJPA-545
+	 */
+	@Test
+	public void detectsInBindingWithSpecialAsianCharactersInParentheses() {
+
+		StringQuery query = new StringQuery("select * from MyEntity where 생일 in (:생일)");
+
+		List<ParameterBinding> bindings = query.getParameterBindings();
+
+		assertThat(bindings, hasSize(1));
+		assertNamedBinding(InParameterBinding.class, "생일", bindings.get(0));
+	}
+
+	/**
+	 * @see DATAJPA-545
+	 */
+	@Test
+	public void detectsInBindingWithSpecialCharactersAndWordCharactersMixedInParentheses() {
+
+		StringQuery query = new StringQuery("select * from MyEntity where foo in (:ab1babc생일233)");
+
+		List<ParameterBinding> bindings = query.getParameterBindings();
+
+		assertThat(bindings, hasSize(1));
+		assertNamedBinding(InParameterBinding.class, "ab1babc생일233", bindings.get(0));
+	}
+
 	private void assertPositionalBinding(Class<? extends ParameterBinding> bindingType, Integer position,
 			ParameterBinding expectedBinding) {