[x3d-public] Calling JavaScript from Java to return an X3D object for manipulation

[John Carlson]

Here's some steps for calling JavaScript from Java which calls JavaScript

Use these imports:

import org.graalvm.polyglot.Context;
import org.graalvm.polyglot.HostAccess;
import org.graalvm.polyglot.Engine;
import org.web3d.x3d.jsail.Core.X3D;

Here is example Java to load and execute JavaScript.  It is based on
DISWebGateway code, but VERY different!

    public X3D JavaScriptExec(String javaScriptString)
      {
          X3D X3D0 = null;
          try
          {
            Engine engine = Engine.newBuilder("js").build();
            Context context = Context.newBuilder("js")
                .engine(engine)
                .allowHostAccess(HostAccess.ALL)
                .allowHostClassLookup(className -> true)
                .arguments("js", new String[]{"--jvm",
"--vm.classpath=lib/X3DJSAIL.4.0.full.jar;lib/saxon-he-12.1.jar"})
                .option("js.ecmascript-version", "2022").build();
            context.eval("js", javaScriptString).asHostObject();
            X3D0 = context.eval("js", "X3D0").asHostObject();
            context.close();
            engine.close();
          } catch(Exception e) {
              e.printStackTrace(System.err);
          }
          return X3D0;
      }
    private void loadJsFile(GenericTableModel model, File selectedFile) {
         this.model = model;
         System.err.println("Opening file "+selectedFile);
         try (FileInputStream fis = new FileInputStream(selectedFile)){
            try (BufferedReader br = new BufferedReader(new
InputStreamReader(fis, "UTF-8"))) {
                StringBuilder sb = new StringBuilder();
                String line;
                while ((line = br.readLine()) != null) {
                    sb.append(line);
                    sb.append("\n");
                }
                String jsCode = sb.toString();
                X3D X3D0 = this.JavaScriptExec(jsCode);
                System.err.println("Version: "+X3D0.getVersion());
                System.err.println("Profile: "+X3D0.getProfile());

            } catch (IOException e) {
                e.printStackTrace(System.err);
            }
            System.err.println("Number of rows in reader
"+model.getModel().getRowCount());
        } catch (IOException e) {
            e.printStackTrace(System.err);
        }
    }

============================================================
I compile with Gradle, but don't run inside Gradle.

Here's some Gradle config:

// https://mvnrepository.com/artifact/org.graalvm.sdk/graal-sdk
    implementation 'org.graalvm.sdk:graal-sdk:24.0.0'
    // https://mvnrepository.com/artifact/org.graalvm.js/js-launcher
    implementation 'org.graalvm.js:js-launcher:24.0.0'
    // https://mvnrepository.com/artifact/org.graalvm.js/js-scriptengine
    implementation 'org.graalvm.js:js-scriptengine:24.0.0'
    // https://mvnrepository.com/artifact/org.graalvm.js/js
    implementation 'org.graalvm.js:js:23.0.3'
    // implementation 'org.graalvm.js:js:24.0.0'
    // https://mvnrepository.com/artifact/org.graalvm.truffle/truffle-api
    implementation 'org.graalvm.truffle:truffle-api:24.0.0'
    // https://mvnrepository.com/artifact/org.graalvm.shadowed/icu4j
    implementation 'org.graalvm.shadowed:icu4j:24.0.0'
    // https://mvnrepository.com/artifact/org.graalvm/launcher-common
    implementation 'org.graalvm:launcher-common:1.0.0-rc7'

                                                             //
https://mvnrepository.com/artifact/org.graalvm.regex/regex

                                                      implementation
'org.graalvm.regex:regex:24.0.0'

                                          implementation
'org.web3d.x3d:X3DJSAIL:4.0-SNAPSHOT'







     //implementation 'org.graalvm.tools:profiler:24.0.0'


 //implementation 'org.graalvm.tools:chromeinspector:24.0.0'

                                                          // needs newer


                                       //implementation
'org.graalvm.compiler:compiler:24.0.0'

                                            //
https://mvnrepository.com/artifact/org.graalvm.truffle/truffle-compiler

                                                       implementation
'org.graalvm.truffle:truffle-compiler:24.0.0'







     implementation 'org.graalvm.polyglot:polyglot:24.0.0'


implementation 'org.graalvm.sdk:collections:24.0.0'

                                                          // implementation
'org.graalvm.sdk:nativeimage:24.0.0'




                    // implementation 'org.graalvm.polyglot:js:24.0.0'


 // Select tools: profiler, inspect, coverage, dap, tools

                                                           implementation
'org.graalvm.polyglot:tools:24.0.0'




                        //
https://mvnrepository.com/artifact/org.graalvm.polyglot/js-community

                                                      implementation
'org.graalvm.polyglot:js-community:24.0.0'
============================================================
Here's how I run my program:

/c/graalvm-jdk-22_windows-x64_bin/graalvm-jdk-22+36.1/bin/java.exe -cp
"build/classes/java/main;C:/Users/john/pythonSAI/X3DJSAIL.4.0.full.jar;build/install/app/lib/tagsoup-1.2.1.jar;lib/graal/collections-24.0.0.jar;lib/graal/graaljs.jar;lib/graal/graaljs-launcher.jar;lib/graal/graaljs-scriptengine.jar;lib/graal/graal-sdk.jar;lib/graal/launcher-common.jar;lib/graal/nativeimage-24.0.0.jar;lib/graal/polyglot-24.0.0.jar;lib/graal/tregex.jar;lib/graal/truffle-api.jar;lib/graal/truffle-compiler-24.0.0.jar;lib/graal/truffle-icu4j.jar;lib/graal/truffle-runtime-24.0.0.jar;."
net.coderextreme.jaminate.TableLoadSave

Here's my lib folder:

lib/graal/collections-24.0.0.jar
lib/graal/graal-sdk.jar
lib/graal/graaljs-launcher.jar
lib/graal/graaljs-scriptengine.jar
lib/graal/graaljs.jar
lib/graal/launcher-common.jar
lib/graal/nativeimage-24.0.0.jar
lib/graal/polyglot-24.0.0.jar
lib/graal/tregex.jar
lib/graal/truffle-api.jar
lib/graal/truffle-compiler-24.0.0.jar
lib/graal/truffle-icu4j.jar
lib/graal/truffle-runtime-24.0.0.jar
lib/saxon-he-12.1.jar
lib/X3DJSAIL.4.0.full.jar

===========================================================
Once I get this working in Gradle, I will repost.

Note that I've not been able to load a JavaScript file from JavaScript in
this scenario, so I've incorporated the X3DJSAIL-JavaScript interface
directly in JavaScript code.

John
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