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Polish SpEL documentation
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sbrannen committed Nov 18, 2024
1 parent a12d40e commit 7196f3f
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Expand Up @@ -12,12 +12,12 @@ Java::
+
[source,java,indent=0,subs="verbatim,quotes"]
----
Inventor einstein = p.parseExpression(
"new org.spring.samples.spel.inventor.Inventor('Albert Einstein', 'German')")
Inventor einstein = parser.parseExpression(
"new org.spring.samples.spel.inventor.Inventor('Albert Einstein', 'German')")
.getValue(Inventor.class);
// create new Inventor instance within the add() method of List
p.parseExpression(
parser.parseExpression(
"Members.add(new org.spring.samples.spel.inventor.Inventor('Albert Einstein', 'German'))")
.getValue(societyContext);
----
Expand All @@ -26,13 +26,13 @@ Kotlin::
+
[source,kotlin,indent=0,subs="verbatim,quotes"]
----
val einstein = p.parseExpression(
"new org.spring.samples.spel.inventor.Inventor('Albert Einstein', 'German')")
val einstein = parser.parseExpression(
"new org.spring.samples.spel.inventor.Inventor('Albert Einstein', 'German')")
.getValue(Inventor::class.java)
// create new Inventor instance within the add() method of List
p.parseExpression(
"Members.add(new org.spring.samples.spel.inventor.Inventor('Albert Einstein', 'German'))")
parser.parseExpression(
"Members.add(new org.spring.samples.spel.inventor.Inventor('Albert Einstein', 'German'))")
.getValue(societyContext)
----
======
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Expand Up @@ -151,10 +151,10 @@ Kotlin::
----
======

As hinted above, binding a `MethodHandle` and registering the bound `MethodHandle` is also
supported. This is likely to be more performant if both the target and all the arguments
are bound. In that case no arguments are necessary in the SpEL expression, as the
following example shows:
As mentioned above, binding a `MethodHandle` and registering the bound `MethodHandle` is
also supported. This is likely to be more performant if both the target and all the
arguments are bound. In that case no arguments are necessary in the SpEL expression, as
the following example shows:

[tabs]
======
Expand All @@ -168,9 +168,10 @@ Java::
String template = "This is a %s message with %s words: <%s>";
Object varargs = new Object[] { "prerecorded", 3, "Oh Hello World!", "ignored" };
MethodHandle mh = MethodHandles.lookup().findVirtual(String.class, "formatted",
MethodType.methodType(String.class, Object[].class))
MethodType.methodType(String.class, Object[].class))
.bindTo(template)
.bindTo(varargs); //here we have to provide arguments in a single array binding
// Here we have to provide the arguments in a single array binding:
.bindTo(varargs);
context.setVariable("message", mh);
// evaluates to "This is a prerecorded message with 3 words: <Oh Hello World!>"
Expand All @@ -189,9 +190,10 @@ Kotlin::
val varargs = arrayOf("prerecorded", 3, "Oh Hello World!", "ignored")
val mh = MethodHandles.lookup().findVirtual(String::class.java, "formatted",
MethodType.methodType(String::class.java, Array<Any>::class.java))
MethodType.methodType(String::class.java, Array<Any>::class.java))
.bindTo(template)
.bindTo(varargs) //here we have to provide arguments in a single array binding
// Here we have to provide the arguments in a single array binding:
.bindTo(varargs)
context.setVariable("message", mh)
// evaluates to "This is a prerecorded message with 3 words: <Oh Hello World!>"
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Expand Up @@ -36,6 +36,8 @@
* Tests invocation of constructors.
*
* @author Andy Clement
* @see MethodInvocationTests
* @see VariableAndFunctionTests
*/
class ConstructorInvocationTests extends AbstractExpressionTests {

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Expand Up @@ -48,6 +48,8 @@
* @author Andy Clement
* @author Phillip Webb
* @author Sam Brannen
* @see ConstructorInvocationTests
* @see VariableAndFunctionTests
*/
class MethodInvocationTests extends AbstractExpressionTests {

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Expand Up @@ -658,7 +658,8 @@ void registerFunctionViaMethodHandleFullyBound() throws Exception {
MethodHandle methodHandle = MethodHandles.lookup().findVirtual(String.class, "formatted",
MethodType.methodType(String.class, Object[].class))
.bindTo(template)
.bindTo(varargs); // here we have to provide arguments in a single array binding
// Here we have to provide the arguments in a single array binding:
.bindTo(varargs);
context.registerFunction("message", methodHandle);

String message = parser.parseExpression("#message()").getValue(context, String.class);
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Expand Up @@ -32,6 +32,8 @@
*
* @author Andy Clement
* @author Sam Brannen
* @see ConstructorInvocationTests
* @see MethodInvocationTests
*/
class VariableAndFunctionTests extends AbstractExpressionTests {

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