/*
* Copyright 2002-2014 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.cache.interceptor;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import org.junit.Test;
import org.springframework.cache.annotation.AnnotationCacheOperationSource;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.cache.annotation.Caching;
import org.springframework.cache.concurrent.ConcurrentMapCache;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.util.ReflectionUtils;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
/**
* @author Costin Leau
* @author Phillip Webb
* @author Sam Brannen
* @author Stephane Nicoll
*/
public class ExpressionEvaluatorTests {
private ExpressionEvaluator eval = new ExpressionEvaluator();
private AnnotationCacheOperationSource source = new AnnotationCacheOperationSource();
private Collection<CacheOperation> getOps(String name) {
Method method = ReflectionUtils.findMethod(AnnotatedClass.class, name, Object.class, Object.class);
return source.getCacheOperations(method, AnnotatedClass.class);
}
@Test
public void testMultipleCachingSource() throws Exception {
Collection<CacheOperation> ops = getOps("multipleCaching");
assertEquals(2, ops.size());
Iterator<CacheOperation> it = ops.iterator();
CacheOperation next = it.next();
assertTrue(next instanceof CacheableOperation);
assertTrue(next.getCacheNames().contains("test"));
assertEquals("#a", next.getKey());
next = it.next();
assertTrue(next instanceof CacheableOperation);
assertTrue(next.getCacheNames().contains("test"));
assertEquals("#b", next.getKey());
}
@Test
public void testMultipleCachingEval() throws Exception {
AnnotatedClass target = new AnnotatedClass();
Method method = ReflectionUtils.findMethod(AnnotatedClass.class, "multipleCaching", Object.class,
Object.class);
Object[] args = new Object[] { new Object(), new Object() };
Collection<ConcurrentMapCache> caches = Collections.singleton(new ConcurrentMapCache("test"));
EvaluationContext evalCtx = eval.createEvaluationContext(caches, method, args, target, target.getClass());
Collection<CacheOperation> ops = getOps("multipleCaching");
Iterator<CacheOperation> it = ops.iterator();
MethodCacheKey key = new MethodCacheKey(method, AnnotatedClass.class);
Object keyA = eval.key(it.next().getKey(), key, evalCtx);
Object keyB = eval.key(it.next().getKey(), key, evalCtx);
assertEquals(args[0], keyA);
assertEquals(args[1], keyB);
}
@Test
public void withReturnValue() throws Exception {
EvaluationContext context = createEvaluationContext("theResult");
Object value = new SpelExpressionParser().parseExpression("#result").getValue(context);
assertThat(value, equalTo((Object) "theResult"));
}
@Test
public void withNullReturn() throws Exception {
EvaluationContext context = createEvaluationContext(null);
Object value = new SpelExpressionParser().parseExpression("#result").getValue(context);
assertThat(value, nullValue());
}
@Test
public void withoutReturnValue() throws Exception {
EvaluationContext context = createEvaluationContext(ExpressionEvaluator.NO_RESULT);
Object value = new SpelExpressionParser().parseExpression("#result").getValue(context);
assertThat(value, nullValue());
}
@Test
public void unavailableReturnValue() throws Exception {
EvaluationContext context = createEvaluationContext(ExpressionEvaluator.RESULT_UNAVAILABLE);
try {
new SpelExpressionParser().parseExpression("#result").getValue(context);
fail("Should have failed to parse expression, result not available");
}
catch (VariableNotAvailableException e) {
assertEquals("wrong variable name", "result", e.getName());
}
}
private EvaluationContext createEvaluationContext(Object result) {
AnnotatedClass target = new AnnotatedClass();
Method method = ReflectionUtils.findMethod(AnnotatedClass.class, "multipleCaching", Object.class,
Object.class);
Object[] args = new Object[] { new Object(), new Object() };
Collection<ConcurrentMapCache> caches = Collections.singleton(new ConcurrentMapCache("test"));
EvaluationContext context = eval.createEvaluationContext(caches, method, args, target, target.getClass(), result);
return context;
}
private static class AnnotatedClass {
@Caching(cacheable = { @Cacheable(value = "test", key = "#a"), @Cacheable(value = "test", key = "#b") })
public void multipleCaching(Object a, Object b) {
}
}
}