/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.el;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import jakarta.el.ELBaseTest;
import jakarta.el.ELContext;
import jakarta.el.ExpressionFactory;
import jakarta.el.ValueExpression;
import jakarta.el.ValueReference;
import org.junit.Assert;
import org.junit.Test;
import org.apache.jasper.el.ELContextImpl;
public class TestValueExpressionImpl extends ELBaseTest {
@Test
public void testGetValueReference() {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
TesterBeanB beanB = new TesterBeanB();
beanB.setName("Tomcat");
ValueExpression var = factory.createValueExpression(beanB, TesterBeanB.class);
context.getVariableMapper().setVariable("beanB", var);
ValueExpression ve = factory.createValueExpression(context, "${beanB.name}", String.class);
// First check the basics work
String result = (String) ve.getValue(context);
Assert.assertEquals("Tomcat", result);
// Now check the value reference
ValueReference vr = ve.getValueReference(context);
Assert.assertNotNull(vr);
Assert.assertEquals(beanB, vr.getBase());
Assert.assertEquals("name", vr.getProperty());
}
@Test
public void testGetValueReferenceVariable() {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
TesterBeanB beanB = new TesterBeanB();
beanB.setName("Tomcat");
ValueExpression var = factory.createValueExpression(beanB, TesterBeanB.class);
context.getVariableMapper().setVariable("beanB", var);
ValueExpression var2 = factory.createValueExpression(context, "${beanB.name}", String.class);
context.getVariableMapper().setVariable("foo", var2);
ValueExpression ve = factory.createValueExpression(context, "${foo}", ValueExpression.class);
// Now check the value reference
ValueReference vr = ve.getValueReference(context);
Assert.assertNotNull(vr);
Assert.assertEquals(beanB, vr.getBase());
Assert.assertEquals("name", vr.getProperty());
}
@Test
public void testBug49345() {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
TesterBeanA beanA = new TesterBeanA();
TesterBeanB beanB = new TesterBeanB();
beanB.setName("Tomcat");
beanA.setBean(beanB);
ValueExpression var = factory.createValueExpression(beanA, TesterBeanA.class);
context.getVariableMapper().setVariable("beanA", var);
ValueExpression ve = factory.createValueExpression(context, "${beanA.bean.name}", String.class);
// First check the basics work
String result = (String) ve.getValue(context);
Assert.assertEquals("Tomcat", result);
// Now check the value reference
ValueReference vr = ve.getValueReference(context);
Assert.assertNotNull(vr);
Assert.assertEquals(beanB, vr.getBase());
Assert.assertEquals("name", vr.getProperty());
}
@Test
public void testBug50105() {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
TesterEnum testEnum = TesterEnum.APPLE;
ValueExpression var = factory.createValueExpression(testEnum, TesterEnum.class);
context.getVariableMapper().setVariable("testEnum", var);
// When coercing an Enum to a String, name() should always be used.
ValueExpression ve1 = factory.createValueExpression(context, "${testEnum}", String.class);
String result1 = (String) ve1.getValue(context);
Assert.assertEquals("APPLE", result1);
ValueExpression ve2 = factory.createValueExpression(context, "foo${testEnum}bar", String.class);
String result2 = (String) ve2.getValue(context);
Assert.assertEquals("fooAPPLEbar", result2);
}
@Test
public void testBug51177ObjectMap() {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
Object o1 = "String value";
Object o2 = Integer.valueOf(32);
Map<Object, Object> map = new HashMap<>();
map.put("key1", o1);
map.put("key2", o2);
ValueExpression var = factory.createValueExpression(map, Map.class);
context.getVariableMapper().setVariable("map", var);
ValueExpression ve1 = factory.createValueExpression(context, "${map.key1}", Object.class);
ve1.setValue(context, o2);
Assert.assertEquals(o2, ve1.getValue(context));
ValueExpression ve2 = factory.createValueExpression(context, "${map.key2}", Object.class);
ve2.setValue(context, o1);
Assert.assertEquals(o1, ve2.getValue(context));
}
@Test
public void testBug51177ObjectList() {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
Object o1 = "String value";
Object o2 = Integer.valueOf(32);
List<Object> list = new ArrayList<>();
list.add(0, o1);
list.add(1, o2);
ValueExpression var = factory.createValueExpression(list, List.class);
context.getVariableMapper().setVariable("list", var);
ValueExpression ve1 = factory.createValueExpression(context, "${list[0]}", Object.class);
ve1.setValue(context, o2);
Assert.assertEquals(o2, ve1.getValue(context));
ValueExpression ve2 = factory.createValueExpression(context, "${list[1]}", Object.class);
ve2.setValue(context, o1);
Assert.assertEquals(o1, ve2.getValue(context));
}
/*
* Test returning an empty list as a bean property.
*/
@Test
public void testBug51544Bean() throws Exception {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
TesterBeanA beanA = new TesterBeanA();
beanA.setValList(Collections.emptyList());
ValueExpression var = factory.createValueExpression(beanA, TesterBeanA.class);
context.getVariableMapper().setVariable("beanA", var);
ValueExpression ve = factory.createValueExpression(context, "${beanA.valList.size()}", Integer.class);
Integer result = (Integer) ve.getValue(context);
Assert.assertEquals(Integer.valueOf(0), result);
}
/*
* Test using list directly as variable.
*/
@Test
public void testBug51544Direct() throws Exception {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
List<?> list = Collections.emptyList();
ValueExpression var = factory.createValueExpression(list, List.class);
context.getVariableMapper().setVariable("list", var);
ValueExpression ve = factory.createValueExpression(context, "${list.size()}", Integer.class);
Integer result = (Integer) ve.getValue(context);
Assert.assertEquals(Integer.valueOf(0), result);
}
@Test
public void testBug56522SetNullValue() {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
TesterBeanB beanB = new TesterBeanB();
beanB.setName("Tomcat");
ValueExpression var = factory.createValueExpression(beanB, TesterBeanB.class);
context.getVariableMapper().setVariable("beanB", var);
ValueExpression ve = factory.createValueExpression(context, "${beanB.name}", String.class);
// First check the basics work
String result = (String) ve.getValue(context);
Assert.assertEquals("Tomcat", result);
// Now set the value to null
ve.setValue(context, null);
Assert.assertEquals("", beanB.getName());
}
@Test
public void testOptional01() {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
final String data = "some data";
TesterBeanJ beanJ = new TesterBeanJ();
TesterBeanJ beanJ2 = new TesterBeanJ();
beanJ2.setData(data);
beanJ.setBean(beanJ2);
ValueExpression var = factory.createValueExpression(beanJ, TesterBeanJ.class);
context.getVariableMapper().setVariable("beanJ", var);
ValueExpression ve = factory.createValueExpression(context, "${beanJ.optionalBean.map(b -> b.data)}",
Optional.class);
@SuppressWarnings("unchecked")
Optional<String> result = (Optional<String>) ve.getValue(context);
Assert.assertEquals(data, result.get());
}
@Test
public void testOptional02() {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
TesterBeanJ beanJ = new TesterBeanJ();
ValueExpression var = factory.createValueExpression(beanJ, TesterBeanJ.class);
context.getVariableMapper().setVariable("beanJ", var);
ValueExpression ve = factory.createValueExpression(context, "${beanJ.optionalBean.map(b -> b.data)}",
Optional.class);
@SuppressWarnings("unchecked")
Optional<String> result = (Optional<String>) ve.getValue(context);
Assert.assertTrue(result.isEmpty());
}
@Test
public void testOptional03() {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
final String data = "some data";
TesterBeanJ beanJ = new TesterBeanJ();
TesterBeanJ beanJ2 = new TesterBeanJ();
beanJ2.setData(data);
beanJ.setBean(beanJ2);
ValueExpression var = factory.createValueExpression(beanJ, TesterBeanJ.class);
context.getVariableMapper().setVariable("beanJ", var);
ValueExpression ve = factory.createValueExpression(context, "${beanJ.optionalBean.get().data}", String.class);
String result = (String) ve.getValue(context);
Assert.assertEquals(data, result);
}
@Test
public void testOptional04() {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
TesterBeanJ beanJ = new TesterBeanJ();
ValueExpression var = factory.createValueExpression(beanJ, TesterBeanJ.class);
context.getVariableMapper().setVariable("beanJ", var);
ValueExpression ve = factory.createValueExpression(context,
"${beanJ.optionalBean.map(b -> b.data).orElse(null)}", String.class);
String result = (String) ve.getValue(context);
// Result is null but is coerced to String which makes it ""
Assert.assertNotNull(result);
Assert.assertTrue(result.isEmpty());
}
@Test
public void testArrayLength01() {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
TesterBeanA beanA = new TesterBeanA();
beanA.setValArray(new String[3]);
ValueExpression var = factory.createValueExpression(beanA, TesterBeanA.class);
context.getVariableMapper().setVariable("beanA", var);
ValueExpression ve = factory.createValueExpression(context, "${beanA.valArray.length}", Integer.class);
// Check the result
Integer result = (Integer) ve.getValue(context);
Assert.assertEquals(Integer.valueOf(3), result);
}
@Test
public void testArrayLength02() {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
TesterBeanA beanA = new TesterBeanA();
beanA.setValArray(new String[0]);
ValueExpression var = factory.createValueExpression(beanA, TesterBeanA.class);
context.getVariableMapper().setVariable("beanA", var);
ValueExpression ve = factory.createValueExpression(context, "${beanA.valArray.length}", Integer.class);
// Check the result
Integer result = (Integer) ve.getValue(context);
Assert.assertEquals(Integer.valueOf(0), result);
}
@Test
public void testArrayLength03() {
ExpressionFactory factory = ExpressionFactory.newInstance();
ELContext context = new ELContextImpl();
TesterBeanA beanA = new TesterBeanA();
ValueExpression var = factory.createValueExpression(beanA, TesterBeanA.class);
context.getVariableMapper().setVariable("beanA", var);
ValueExpression ve = factory.createValueExpression(context, "${beanA.valArray.length}", Integer.class);
// Check the result
Integer result = (Integer) ve.getValue(context);
Assert.assertNull(result);
}
}