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JAVA-18148 Create a new java-nashorn project from the existing langua… (#14268)

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* JAVA-18148 Create a new java-nashorn project from the existing language-interop

* JAVA-18148 Cleanup the project to contain just the python related language interop

---------

Co-authored-by: timis1 <noreplay@yahoo.com>
This commit is contained in:
timis1
2023-06-21 06:52:00 +03:00
committed by GitHub
parent 9c18d908f9
commit c1c1fb2c2d
15 changed files with 89 additions and 4 deletions
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1
language-interop/README.md
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@@ -5,4 +5,3 @@ This module contains articles about Java interop with other language integration
### Relevant Articles:
- [How to Call Python From Java](https://www.baeldung.com/java-working-with-python)
- [Introduction to Nashorn](http://www.baeldung.com/java-nashorn)

2
language-interop/pom.xml
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@@ -41,7 +41,7 @@
</build>
<properties>
<jython.version>2.7.2</jython.version>
<jython.version>2.7.3b1</jython.version>
<commons-exec.version>1.3</commons-exec.version>
</properties>

15
language-interop/src/main/resources/js/bind.js
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@@ -1,15 +0,0 @@
var first = {
name: "Whiskey",
age: 5
};
var second = {
volume: 100
};
Object.bindProperties(first, second);
print(first.volume);
second.volume = 1000;
print(first.volume);

1
language-interop/src/main/resources/js/locations.js
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@@ -1 +0,0 @@
print(__FILE__, __LINE__, __DIR__);

19
language-interop/src/main/resources/js/math_module.js
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@@ -1,19 +0,0 @@
var math = {
increment: function (num) {
return ++num;
},
failFunc: function () {
try {
throw "BOOM";
} catch (e if typeof e === 'string') {
print("String thrown: " + e);
}
catch (e) {
print("this shouldn't happen!");
}
}
};
math;

11
language-interop/src/main/resources/js/no_such.js
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@@ -1,11 +0,0 @@
var demo = {
__noSuchProperty__: function (propName) {
print("Accessed non-existing property: " + propName);
},
__noSuchMethod__: function (methodName) {
print("Invoked non-existing method: " + methodName);
}
};
demo;

1
language-interop/src/main/resources/js/script.js
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@@ -1 +0,0 @@
function increment(num) ++num;

2
language-interop/src/main/resources/js/trim.js
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@@ -1,2 +0,0 @@
print(" hello world".trimLeft());
print("hello world ".trimRight());

9
language-interop/src/main/resources/js/typed_arrays.js
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@@ -1,9 +0,0 @@
function arrays(arr) {
var javaIntArray = Java.to(arr, "int[]");
print(javaIntArray[0]);
print(javaIntArray[1]);
print(javaIntArray[2]);
}
arrays([100, "1654", true]);

109
language-interop/src/test/java/com/baeldung/language/interop/javascript/NashornUnitTest.java
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@@ -1,109 +0,0 @@
package com.baeldung.language.interop.javascript;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import javax.script.*;
import java.io.InputStreamReader;
import java.util.List;
import java.util.Map;
public class NashornUnitTest {
private ScriptEngine engine;
@Before
public void setUp() {
engine = new ScriptEngineManager().getEngineByName("nashorn");
}
@Test
public void trim() throws ScriptException {
engine.eval(new InputStreamReader(NashornUnitTest.class.getResourceAsStream("/js/trim.js")));
}
@Test
public void locations() throws ScriptException {
engine.eval(new InputStreamReader(NashornUnitTest.class.getResourceAsStream("/js/locations.js")));
}
@Test
public void bindProperties() throws ScriptException {
engine.eval(new InputStreamReader(NashornUnitTest.class.getResourceAsStream("/js/bind.js")));
}
@Test
public void magicMethods() throws ScriptException {
engine.eval("var demo = load('classpath:js/no_such.js');" + "var tmp = demo.doesNotExist;" + "var none = demo.callNonExistingMethod()");
}
@Test
public void typedArrays() throws ScriptException {
engine.eval(new InputStreamReader(NashornUnitTest.class.getResourceAsStream("/js/typed_arrays.js")));
}
@Test
public void basicUsage() throws ScriptException {
Object result = engine.eval("var greeting='hello world';" + "print(greeting);" + "greeting");
Assert.assertEquals("hello world", result);
}
@Test
public void jsonObjectExample() throws ScriptException {
Object obj = engine.eval("Java.asJSONCompatible({ number: 42, greet: 'hello', primes: [2,3,5,7,11,13] })");
Map<String, Object> map = (Map<String, Object>) obj;
Assert.assertEquals("hello", map.get("greet"));
Assert.assertTrue(List.class.isAssignableFrom(map.get("primes").getClass()));
}
@Test
public void tryCatchGuard() throws ScriptException {
engine.eval("var math = loadWithNewGlobal('classpath:js/math_module.js');" + "math.failFunc();");
}
@Test
public void extensionsExamples() throws ScriptException {
String script = "var list = [1, 2, 3, 4, 5];" + "var result = '';" + "for each (var i in list) {" + "result+=i+'-';" + "};" + "print(result);";
engine.eval(script);
}
@Test
public void bindingsExamples() throws ScriptException {
Bindings bindings = engine.createBindings();
bindings.put("count", 3);
bindings.put("name", "baeldung");
String script = "var greeting='Hello ';" + "for(var i=count;i>0;i--) { " + "greeting+=name + ' '" + "}" + "greeting";
Object bindingsResult = engine.eval(script, bindings);
Assert.assertEquals("Hello baeldung baeldung baeldung ", bindingsResult);
}
@Test
public void jvmBoundaryExamples() throws ScriptException, NoSuchMethodException {
engine.eval("function composeGreeting(name) {" + "return 'Hello ' + name" + "}");
Invocable invocable = (Invocable) engine;
Object funcResult = invocable.invokeFunction("composeGreeting", "baeldung");
Assert.assertEquals("Hello baeldung", funcResult);
Object map = engine.eval("var HashMap = Java.type('java.util.HashMap');" + "var map = new HashMap();" + "map.put('hello', 'world');" + "map");
Assert.assertTrue(Map.class.isAssignableFrom(map.getClass()));
}
@Test
public void loadExamples() throws ScriptException {
Object loadResult = engine.eval("load('classpath:js/script.js');" + "increment(5)");
Assert.assertEquals(6, ((Double) loadResult).intValue());
Object math = engine.eval("var math = loadWithNewGlobal('classpath:js/math_module.js');" + "math.increment(5);");
Assert.assertEquals(6.0, math);
}
}