public class UserRepositoryImpl extends JpaTemplate implements UserRepository {

   public UserProfile getUser(String email) {
      List<UserProfile> users = find("from userProfile u where u.email = " + email);
      if (users == null || users.size() == 0) {
         return null;
      }
      if (users.size() == 1) {
         return users.get(0);
      }
      throw new RuntimeException("More than one user registered with the same email");
   }


}

org.springframework.dao.InvalidDataAccessApiUsageException: org.hibernate.QueryException: unexpected char: '@' [from no.elo.product.tipsystem.domain.UserProfile u where u.email = john.doe@email.com]; nested exception is java.lang.IllegalArgumentException: org.hibernate.QueryException: unexpected char: '@' [from no.elo.product.tipsystem.domain.UserProfile u where u.email = john.doe@email.com]
   at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:229)
   at org.springframework.orm.jpa.DefaultJpaDialect.translateExceptionIfPossible(DefaultJpaDialect.java:114)
   at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:212)
   at org.springframework.orm.jpa.JpaAccessor.translateIfNecessary(JpaAccessor.java:152)
   at org.springframework.orm.jpa.JpaTemplate.execute(JpaTemplate.java:190)
   at org.springframework.orm.jpa.JpaTemplate.executeFind(JpaTemplate.java:152)
   at org.springframework.orm.jpa.JpaTemplate.find(JpaTemplate.java:299)
   at org.springframework.orm.jpa.JpaTemplate.find(JpaTemplate.java:295)
   at no.elo.product.tipsystem.repository.SaleTipRepositoryImpl.getUser(SaleTipRepositoryImpl.java:24)
   at no.elo.product.tipsystem.repository.SaleTipRepositoryImpl.save(SaleTipRepositoryImpl.java:55)
   at no.elo.product.tipsystem.repository.RepostitoryTest.onSetUpInTransaction(RepostitoryTest.java:27)
   at org.springframework.test.AbstractTransactionalSpringContextTests.onSetUp(AbstractTransactionalSpringContextTests.java:176)
   at org.springframework.test.AbstractSingleSpringContextTests.setUp(AbstractSingleSpringContextTests.java:89)
   at junit.framework.TestCase.runBare(TestCase.java:125)
   at org.springframework.test.ConditionalTestCase.runBare(ConditionalTestCase.java:69)
   at org.springframework.test.annotation.AbstractAnnotationAwareTransactionalTests.access$001(AbstractAnnotationAwareTransactionalTests.java:47)
   at org.springframework.test.annotation.AbstractAnnotationAwareTransactionalTests$1.run(AbstractAnnotationAwareTransactionalTests.java:113)
   at org.springframework.test.annotation.AbstractAnnotationAwareTransactionalTests.runTest(AbstractAnnotationAwareTransactionalTests.java:176)
   at org.springframework.test.annotation.AbstractAnnotationAwareTransactionalTests.runTestTimed(AbstractAnnotationAwareTransactionalTests.java:150)
   at org.springframework.test.annotation.AbstractAnnotationAwareTransactionalTests.runBare(AbstractAnnotationAwareTransactionalTests.java:109)
   at org.springframework.test.jpa.AbstractJpaTests.runBare(AbstractJpaTests.java:174)
   at org.springframework.test.jpa.AbstractJpaTests.runBare(AbstractJpaTests.java:254)
   at junit.framework.TestResult$1.protect(TestResult.java:106)
   at junit.framework.TestResult.runProtected(TestResult.java:124)
   at junit.framework.TestResult.run(TestResult.java:109)
   at junit.framework.TestCase.run(TestCase.java:118)
   at junit.framework.TestSuite.runTest(TestSuite.java:208)
   at junit.framework.TestSuite.run(TestSuite.java:203)
   at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
   at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
   at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.lang.IllegalArgumentException: org.hibernate.QueryException: unexpected char: '@' [from no.elo.product.tipsystem.domain.UserProfile u where u.email = john.doe@email.com]
   at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:616)
   at org.hibernate.ejb.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:95)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.springframework.orm.jpa.JpaTemplate$CloseSuppressingInvocationHandler.invoke(JpaTemplate.java:394)
   at $Proxy13.createQuery(Unknown Source)
   at org.springframework.orm.jpa.JpaTemplate$9.doInJpa(JpaTemplate.java:301)
   at org.springframework.orm.jpa.JpaTemplate.execute(JpaTemplate.java:185)
   ... 29 more
Caused by: org.hibernate.QueryException: unexpected char: '@' [from no.elo.product.tipsystem.domain.UserProfile u where u.email = john.doe@email.com]
   at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:204)
   at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:111)
   at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:77)
   at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:56)
   at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:72)
   at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:133)
   at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:112)
   at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1623)
   at org.hibernate.ejb.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:92)
   ... 37 more