DATADOC-90 - Refactored PartTreeJpaQuery to create new JpaQueryCreator on every query recreation.

JpaQueryCreator is stateful as we create a list of ParameterExpressions and iterate over them. So we have to re-instantiate the JpaQueryCreator to not create an exception on the second attempt.

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

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2011 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.jpa.repository.query;
+
+import java.lang.reflect.Method;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.jpa.domain.sample.User;
+import org.springframework.data.jpa.repository.support.PersistenceProvider;
+import org.springframework.data.repository.Repository;
+import org.springframework.data.repository.core.support.DefaultRepositoryMetadata;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+
+/**
+ * Integration tests for {@link PartTreeJpaQuery}.
+ * 
+ * @author Oliver Gierke
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration("classpath:infrastructure.xml")
+public class PartTreeJpaQueryIntegrationTests {
+
+    @PersistenceContext
+    EntityManager entityManager;
+
+
+    /**
+     * @see DATADOC-90
+     * @throws Exception
+     */
+    @Test
+    public void test() throws Exception {
+
+        Method method =
+                UserRepository.class.getMethod("findByFirstname", String.class,
+                        Pageable.class);
+        JpaQueryMethod queryMethod =
+                new JpaQueryMethod(method, new DefaultRepositoryMetadata(
+                        UserRepository.class),
+                        PersistenceProvider.fromEntityManager(entityManager));
+        PartTreeJpaQuery jpaQuery =
+                new PartTreeJpaQuery(queryMethod, entityManager);
+
+        jpaQuery.createQuery(new Object[] { "Matthews", new PageRequest(0, 1) });
+        jpaQuery.createQuery(new Object[] { "Matthews", new PageRequest(0, 1) });
+    }
+
+    interface UserRepository extends Repository<User, Long> {
+
+        Page<User> findByFirstname(String firstname, Pageable pageable);
+    }
+}