Menu
I have java method
void someMethod(String str, Map map) {
...
}
From JS call this method
var map = new Object()
map.key1 = "val1"
...someMethod(str, map)
Exception:
java.lang.NoSuchMethodException: None of the fixed arity signatures
[(java.lang.String, java.util.Map)] of method org.prjctor.shell.Bash.eval
match the argument types [java.lang.String, jdk.nashorn.internal.scripts.JO]
But in Nashorn docs "Mapping of Data Types Between Java and JavaScript" said "Every JavaScript object is also a java.util.Map so APIs receiving maps will receive them directly".
What am I doing wrong?
640
Nashorn: Nashorn is a JavaScript engine which is introduced in JDK 8. With the help of Nashorn, we can execute JavaScript code at Java Virtual Machine. Nashorn is introduced in JDK 8 to replace existing JavaScript engine i.e. Rhino.
While the Nashorn team didn't have time to deliver the complete ES6 feature set for the JDK 9 release, more ES6 features will follow in future updates. To activate ES6 support, use --language=es6 on the command line.
The Nashorn engine is included in the Java SE Development Kit (JDK). You can invoke Nashorn from a Java application using the Java Scripting API to interpret embedded scripts, or you can pass the script to the jjs or jrunscript tool. Note: Nashorn is the only JavaScript engine included in the JDK.
More specifically, a Java Map can store pairs of keys and values. Each key is linked to a specific value. Once stored in a Map , you can later look up the value using just the key. The Java Map interface is not a subtype of the Collection interface.
Agree with the previous answers that you cannot do this as the docs have implied. However you could create and pass a map as follows
..
var HashMap = Java.type('java.util.HashMap');
var map = new HashMap();
map.put('1', 'val1');
...someMethod(str, map)
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
