public void TestBraceAccess()
{
var rootObject = new ServiceExpressionContext(serviceProvider.GetService <IApplicationContext>());
var context = new StandardEvaluationContext(rootObject);
context.AddPropertyAccessor(new ServiceExpressionContextAccessor());
context.AddPropertyAccessor(new ConfigurationAccessor());
var sep = new SpelExpressionParser();
// basic
var ex = sep.ParseExpression("configuration['my.name']");
Assert.Equal("myservice", ex.GetValue <string>(context));
}
public void TestAddingSpecificPropertyAccessor()
{
var parser = new SpelExpressionParser();
var ctx = new StandardEvaluationContext();
// Even though this property accessor is added after the reflection one, it specifically
// names the String class as the type it is interested in so is chosen in preference to
// any 'default' ones
ctx.AddPropertyAccessor(new StringyPropertyAccessor());
var expr = parser.ParseRaw("new String('hello').flibbles");
var i = expr.GetValue(ctx, typeof(int));
Assert.Equal(7, (int)i);
// The reflection one will be used for other properties...
expr = parser.ParseRaw("new String('hello').Length");
var o = expr.GetValue(ctx);
Assert.NotNull(o);
var flibbleexpr = parser.ParseRaw("new String('hello').flibbles");
flibbleexpr.SetValue(ctx, 99);
i = flibbleexpr.GetValue(ctx, typeof(int));
Assert.Equal(99, (int)i);
// Cannot set it to a string value
Assert.Throws <SpelEvaluationException>(() => flibbleexpr.SetValue(ctx, "not allowed"));
// message will be: EL1063E:(pos 20): A problem occurred whilst attempting to set the property
// 'flibbles': 'Cannot set flibbles to an object of type 'class java.lang.String''
// System.out.println(e.getMessage());
}
public void TestScenario02_ComparingNames()
{
var parser = new SpelExpressionParser();
var ctx = new StandardEvaluationContext();
ctx.AddPropertyAccessor(new SecurityPrincipalAccessor());
// Multiple options for supporting this expression: "p.name == principal.name"
// (1) If the right person is the root context object then "name==principal.name" is good enough
var expr = parser.ParseRaw("Name == Principal.Name");
ctx.SetRootObject(new Person("Andy"));
var value = expr.GetValue(ctx, typeof(bool));
Assert.True((bool)value);
ctx.SetRootObject(new Person("Christian"));
value = expr.GetValue(ctx, typeof(bool));
Assert.False((bool)value);
// (2) Or register an accessor that can understand 'p' and return the right person
expr = parser.ParseRaw("P.Name == Principal.Name");
var pAccessor = new PersonAccessor();
ctx.AddPropertyAccessor(pAccessor);
ctx.SetRootObject(null);
pAccessor.ActivePerson = new Person("Andy");
value = expr.GetValue(ctx, typeof(bool));
Assert.True((bool)value);
pAccessor.ActivePerson = new Person("Christian");
value = expr.GetValue(ctx, typeof(bool));
Assert.False((bool)value);
}
public void TestScenario_AddingYourOwnPropertyResolvers_2()
{
// Create a parser
var parser = new SpelExpressionParser();
// Use the standard evaluation context
var ctx = new StandardEvaluationContext();
ctx.AddPropertyAccessor(new VegetableColourAccessor());
var expr = parser.ParseRaw("Pea");
var value = expr.GetValue(ctx);
Assert.Equal(Color.Green, value);
var ex = Assert.Throws <SpelEvaluationException>(() => expr.SetValue(ctx, Color.Blue));
Assert.Equal(SpelMessage.PROPERTY_OR_FIELD_NOT_WRITABLE_ON_NULL, ex.MessageCode);
}
public void ShouldAlwaysUsePropertyAccessorFromEvaluationContext()
{
var parser = new SpelExpressionParser();
var expression = parser.ParseExpression("name");
var context = new StandardEvaluationContext();
context.AddPropertyAccessor(new ConfigurablePropertyAccessor(new Dictionary <string, object>()
{
{ "name", "Ollie" }
}));
Assert.Equal("Ollie", expression.GetValue(context));
context = new StandardEvaluationContext();
context.AddPropertyAccessor(new ConfigurablePropertyAccessor(new Dictionary <string, object>()
{
{ "name", "Jens" }
}));
Assert.Equal("Jens", expression.GetValue(context));
}
public void IndexIntoGenericPropertyContainingMapobject()
{
var property = new Dictionary <string, Dictionary <string, string> >();
var map = new Dictionary <string, string>();
map.Add("foo", "bar");
property.Add("property", map);
var parser = new SpelExpressionParser();
var context = new StandardEvaluationContext();
context.AddPropertyAccessor(new MapAccessor());
context.SetRootObject(property);
var expression = parser.ParseExpression("property");
Assert.Equal(typeof(Dictionary <string, string>), expression.GetValueType(context));
Assert.Equal(map, expression.GetValue(context));
Assert.Equal(map, expression.GetValue(context, typeof(IDictionary)));
expression = parser.ParseExpression("property['foo']");
Assert.Equal("bar", expression.GetValue(context));
}
public void MapAccessorCompilable()
{
var testMap = GetSimpleTestDictionary();
var sec = new StandardEvaluationContext();
sec.AddPropertyAccessor(new DictionaryAccessor());
var sep = new SpelExpressionParser();
// basic
var ex = sep.ParseExpression("foo");
Assert.Equal("bar", ex.GetValue(sec, testMap));
// assertThat(SpelCompiler.compile(ex)).isTrue();
// assertThat(ex.getValue(sec, testMap)).isEqualTo("bar");
// compound expression
ex = sep.ParseExpression("foo.ToUpper()");
Assert.Equal("BAR", ex.GetValue(sec, testMap));
// assertThat(SpelCompiler.compile(ex)).isTrue();
// assertThat(ex.getValue(sec, testMap)).isEqualTo("BAR");
// nested map
var nestedMap = GetNestedTestDictionary();
ex = sep.ParseExpression("aaa.foo.ToUpper()");
Assert.Equal("BAR", ex.GetValue(sec, nestedMap));
// assertThat(SpelCompiler.compile(ex)).isTrue();
// assertThat(ex.getValue(sec, nestedMap)).isEqualTo("BAR");
// avoiding inserting checkcast because first part of expression returns a Map
ex = sep.ParseExpression("Map.foo");
MapGetter mapGetter = new MapGetter();
Assert.Equal("bar", ex.GetValue(sec, mapGetter));
// assertThat(SpelCompiler.compile(ex)).isTrue();
// assertThat(ex.getValue(sec, mapGetter)).isEqualTo("bar");
}
public void TestAddingRemovingAccessors()
{
var ctx = new StandardEvaluationContext();
// reflective property accessor is the only one by default
var propertyAccessors = ctx.PropertyAccessors;
Assert.Single(propertyAccessors);
var spa = new StringyPropertyAccessor();
ctx.AddPropertyAccessor(spa);
Assert.Equal(2, ctx.PropertyAccessors.Count);
var copy = new List <IPropertyAccessor>(ctx.PropertyAccessors);
Assert.True(ctx.RemovePropertyAccessor(spa));
Assert.False(ctx.RemovePropertyAccessor(spa));
Assert.Single(ctx.PropertyAccessors);
ctx.PropertyAccessors = copy;
Assert.Equal(2, ctx.PropertyAccessors.Count);
}
