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DATACMNS-533 - Expose special parameters in SpEL expressions.

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We now expose special parameters like Pageable and Sort to be used in SpEL expressions if they don't collide with existing named parameters.

Related pull request: spring-projects/spring-data-jpa#101
Related ticket: DATAJPA-564
This commit is contained in:
Thomas Darimont
2014-07-07 17:58:44 +02:00
committed by Oliver Gierke
parent d23e7baa2c
commit 31848f87eb
3 changed files with 96 additions and 8 deletions
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48
src/test/java/org/springframework/data/repository/query/ExtensibleEvaluationContextProviderUnitTests.java
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@@ -27,6 +27,10 @@ import java.util.Map;
import org.junit.Before;
import org.junit.Test;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.domain.Sort.Direction;
import org.springframework.data.repository.query.spi.EvaluationContextExtension;
import org.springframework.data.repository.query.spi.EvaluationContextExtensionSupport;
import org.springframework.expression.EvaluationContext;
@@ -134,6 +138,40 @@ public class ExtensibleEvaluationContextProviderUnitTests {
assertThat(evaluateExpression("_first.DUMMY_KEY", provider), is((Object) "dummy"));
}
/**
* @see DATACMNS-533
*/
@Test
public void exposesPageableParameter() throws Exception {
this.parameters = new DefaultParameters(SampleRepo.class.getMethod("findByFirstname", String.class, Pageable.class));
ExtensionAwareEvaluationContextProvider provider = new ExtensionAwareEvaluationContextProvider(
Collections.<EvaluationContextExtension> emptyList());
PageRequest pageable = new PageRequest(2, 3, new Sort(Direction.DESC, "lastname"));
assertThat(evaluateExpression("#pageable.offset", provider, new Object[] { "test", pageable }), is((Object) 6));
assertThat(evaluateExpression("#pageable.pageSize", provider, new Object[] { "test", pageable }), is((Object) 3));
assertThat(evaluateExpression("#pageable.sort.toString()", provider, new Object[] { "test", pageable }),
is((Object) "lastname: DESC"));
}
/**
* @see DATACMNS-533
*/
@Test
public void exposesSortParameter() throws Exception {
this.parameters = new DefaultParameters(SampleRepo.class.getMethod("findByFirstname", String.class, Sort.class));
ExtensionAwareEvaluationContextProvider provider = new ExtensionAwareEvaluationContextProvider(
Collections.<EvaluationContextExtension> emptyList());
Sort sort = new Sort(Direction.DESC, "lastname");
assertThat(evaluateExpression("#sort.toString()", provider, new Object[] { "test", sort }),
is((Object) "lastname: DESC"));
}
public static class DummyExtension extends EvaluationContextExtensionSupport {
public static String DUMMY_KEY = "dummy";
@@ -196,13 +234,21 @@ public class ExtensibleEvaluationContextProviderUnitTests {
}
private Object evaluateExpression(String expression, EvaluationContextProvider provider) {
return evaluateExpression(expression, provider, new Object[] { "parameterValue" });
}
EvaluationContext evaluationContext = provider.getEvaluationContext(parameters, new Object[] { "parameterValue" });
private Object evaluateExpression(String expression, EvaluationContextProvider provider, Object[] args) {
EvaluationContext evaluationContext = provider.getEvaluationContext(parameters, args);
return new SpelExpressionParser().parseExpression(expression).getValue(evaluationContext);
}
interface SampleRepo {
List<Object> findByFirstname(@Param("firstname") String firstname);
List<Object> findByFirstname(@Param("firstname") String firstname, Pageable pageable);
List<Object> findByFirstname(@Param("firstname") String firstname, Sort sort);
}
}