I have a bean that implements JSObject ( & Map ) interface as shown below. I have removed some overridden methods to make it easy to read.
package test.nashorn;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import jdk.nashorn.api.scripting.JSObject;
public class JSBean implements JSObject, Map<String,Object>{
/**
* The current values for this object.
*/
private HashMap<String, Object> values = new HashMap<>();
#Override
public String toString() {
System.out.println("ToString");
Set<Entry<String,Object>> entries = values.entrySet();
StringBuilder sb = new StringBuilder();
for(Entry<String,Object> entry:entries){
sb.append(entry.getKey()+ " "+(String)entry.getValue());
}
System.out.println("Completed ToString");
return sb.toString();
}
#Override
public boolean hasMember(String name) {
return has(name);
}
// get the value of that named property
#Override
public Object getMember(String name) {
return get(name);
}
// get the value of that named property
#Override
public void setMember(String name,Object value) {
put(name,value);
}
public Object get(String name) {
System.out.println("JAVA Get is called."+name);
System.out.println("Called for this"+name+" and returned"
+":"+values.get(name));
return values.get(name);
}
#Override
public Object put(String name, Object value) {
System.out.println("JAVA Put is called. Input name: " + name + "\n Input values: " + value);
return values.put(name, value);
}
public boolean has(String name) {
System.out.println("JAVA Has is called. Input name: " + name);
return values.containsKey(name);
}
public JSBean() {
// TODO Auto-generated constructor stub
}
#Override
public Object call(Object arg0, Object... arg1) {
// TODO Auto-generated method stub
return null;
}
#Override
public Object eval(String arg0) {
// TODO Auto-generated method stub
return null;
}
#Override
public String getClassName() {
// TODO Auto-generated method stub
return null;
}
#Override
public Object getSlot(int arg0) {
// TODO Auto-generated method stub
return null;
}
#Override
public boolean hasSlot(int arg0) {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean isArray() {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean isFunction() {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean isInstance(Object arg0) {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean isInstanceOf(Object arg0) {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean isStrictFunction() {
// TODO Auto-generated method stub
return false;
}
}
When i run the test shown below
#Test
public void testDefaultValMethod(){
JSBean bean = new JSBean();
bean.setMember("hello", " Sport ");
//Add stuff to engine.
engine.put("jsBean", bean);
String source = "(function(){\n"
+ "print(jsBean);"
+ "} )();";
Object obj=null;
try {
obj = engine.eval(source);
} catch (ScriptException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("Returned : " + String.valueOf(obj));
}
I see the below error in the console. Ideally Nashorn should have directly called the toString() method of the bean to get the String implementation. Not sure what is going wrong here. I did try adding a call to 'toString()' explicitly in the getMember() method call but that did not fix the problem.
JAVA Put is called. Input name: hello
Input values: Sport
JAVA Get is called.toString
Called for thistoString and returned:null
JAVA Get is called.valueOf
Called for thisvalueOf and returned:null
javax.script.ScriptException: TypeError: cannot.get.default.string in <eval> at line number 2
at jdk.nashorn.api.scripting.NashornScriptEngine.throwAsScriptException(NashornScriptEngine.java:467)
at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:451)
at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:403)
at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:399)
at jdk.nashorn.api.scripting.NashornScriptEngine.eval(NashornScriptEngine.java:155)
at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264)
at test.nashorn.NashornTest.testDefaultValMethod(NashornTest.java:386)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: <eval>:2 TypeError: cannot.get.default.string
at jdk.nashorn.internal.runtime.JSType.toPrimitive(JSType.java:514)
at jdk.nashorn.internal.runtime.JSType.toPrimitive(JSType.java:480)
at jdk.nashorn.internal.runtime.JSType.toStringImpl(JSType.java:1391)
at jdk.nashorn.internal.runtime.JSType.toString(JSType.java:589)
at jdk.nashorn.internal.objects.Global.printImpl(Global.java:2782)
at jdk.nashorn.internal.objects.Global.println(Global.java:1497)
at jdk.nashorn.internal.scripts.Script$Recompilation$1$11$\^eval\_.L:1(<eval>:2)
at jdk.nashorn.internal.scripts.Script$\^eval\_.:program(<eval>:1)
at jdk.nashorn.internal.runtime.ScriptFunctionData.invoke(ScriptFunctionData.java:640)
at jdk.nashorn.internal.runtime.ScriptFunction.invoke(ScriptFunction.java:228)
at jdk.nashorn.internal.runtime.ScriptRuntime.apply(ScriptRuntime.java:393)
at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:446)
... 29 more
Caused by: java.lang.UnsupportedOperationException: cannot.get.default.string
at jdk.nashorn.api.scripting.DefaultValueImpl.getDefaultValue(DefaultValueImpl.java:53)
at jdk.nashorn.api.scripting.AbstractJSObject.getDefaultValue(AbstractJSObject.java:289)
at jdk.nashorn.internal.runtime.JSType.toPrimitive(JSType.java:512)
... 40 more
Returned : null
print or "toString" conversions from scripts call "toString" method on the script object. Any property access (including function valued property) on a JSObject is routed to getMember method. So, to make "valueOf" or "toString" you've to implement appropriate getMember in your JSObject subtype.
Example:
import jdk.nashorn.api.scripting.*;
import javax.script.*;
public class Main {
static class MyJSObject extends AbstractJSObject {
#Override
public Object getMember(String name) {
if (name.equals("toString")) {
// return a "function" object for "toString" property
return new AbstractJSObject() {
#Override
public boolean isFunction() {
return true;
}
#Override
public Object call(Object self, Object...args) {
return self.toString();
}
};
}
return null; // other properties here
}
#Override
public String toString() {
return "my js object";
}
}
public static void main(String[] a) throws Exception {
ScriptEngineManager m = new ScriptEngineManager();
ScriptEngine e = m.getEngineByName("nashorn");
e.put("myObj", new MyJSObject());
e.eval("print(myObj)");
}
}
Alternatively, you can also override
Object getDefaultValue(final Class<?> hint) throws UnsupportedOperationException
method in your AbstractJSObject subclass.
import jdk.nashorn.api.scripting.*;
import javax.script.*;
public class Main2 {
static class MyJSObject extends AbstractJSObject {
#Override
public Object getDefaultValue(Class<?> hint) {
if (hint == String.class) {
return toString();
}
throw new UnsupportedOperationException("no conversion for " + hint);
}
#Override
public String toString() {
return "my js object";
}
}
public static void main(String[] a) throws Exception {
ScriptEngineManager m = new ScriptEngineManager();
ScriptEngine e = m.getEngineByName("nashorn");
e.put("myObj", new MyJSObject());
e.eval("print(myObj)");
}
}
Related
Now I face with some problems about principal data. Maybe it sounds like a fool. But I'm new to Spring..
I wanted to get some specific data from principal data, but it occured an error, So I cant.
this is my customUserDetails that implement UserDetails.
private String id;
private String pw;
private String name;
private String auth;
private String level;
private String label;
private int enabled;
#Override
public Collection<? extends GrantedAuthority> getAuthorities() {
ArrayList<GrantedAuthority> authList = new ArrayList<GrantedAuthority>();
authList.add(new SimpleGrantedAuthority(auth));
return authList;
}
#Override
public String getPassword() {
return pw;
}
#Override
public String getUsername() {
return id;
}
#Override
public boolean isAccountNonExpired() {
return true;
}
#Override
public boolean isAccountNonLocked() {
return true;
}
#Override
public boolean isCredentialsNonExpired() {
return true;
}
#Override
public boolean isEnabled() {
return enabled==1?true:false;
}
public String getName() {
return name;
}
public String getLabel() { return label;} // 4월 19일 동현 추가
public void setName(String name) {
this.name = name;
}
public String getAuth() {
return auth;
}
And this is principal data I got from console.log
CustomUserDetails(id=admin, pw=$2a$10$Z9C0gTGV0weknBvNi4YFY.l41vjrYo4UgO3MlPwgmIn4uDeYlepFq, name=Admin, auth=ROLE_ADMIN, level=null, label=N, enabled=1)
I want to extract label value from Principal, so I tried to do this code, but I can't.
console.log('${sessionScope.SPRING_SECURITY_CONTEXT.authentication.principal.label}');
How can I get 'label' data from principal?
Thank you for your kind support :)
In your Controller or any other bean, autowire user details like
public String doSomething(#AuthenticationPrincipal CustomUserDetails userDetails) {
String label = userDetails.getLabel();
}
I can"t understand the problem because i found nowhere the same problem.
i tried to insert product with type "pièces détachées". On the browser path /Produits the product doesn't show up but when i remove the accents from the string it's inserting in the mysql db. I tried to insert accents in the db the query is ok. But with my code it's impossible to do the same. here's a sample of my code for Produit :
//ajouter un produit
#PostMapping(value = "/Produits")
public ResponseEntity<Void> ajouterProduit(#RequestBody ProduitDTO produit) {
Produit produitCK = new Produit();
produitCK.setIdPM(new ProduitMagasin(produit.getId(), produit.getIdMagasin()));
produitCK.setDateAjout(produit.getDateAjout());
produitCK.setEtatProduit(produit.getEtatProduit());
produitCK.setIdReference(produit.getIdReference());
produitCK.setNumeroSerie(produit.getNumeroSerie());
produitCK.setPrixVente(produit.getPrixVente());
produitCK.setTVA(produit.getTVA());
produitCK.setType(produit.getType());
Produit produitAdded = produitDao.save(produitCK);
if (produitAdded == null)
return ResponseEntity.noContent().build();
else
return new ResponseEntity<>(HttpStatus.CREATED);
}
ProduitDTO :
package com.stationphone.db.model;
import java.sql.Timestamp;
/**
*
* #author Administrateur
*/
public class ProduitDTO {
private int id;
public enum Type {
PIECES {
public String getString() {
return "pièces detachées";
}
},
VENTE {
public String getString() {
return "vente en magasin";
}
};
public abstract String getString();
}
private String type;
private int id_reference;
private String numero_serie;
private Timestamp date_ajout;
private String marque;
private String modele;
private float prix_vente;
private double prixHT;
private float tva;
private String etat_produit;
private int id_magasin;
public int getId(){
return this.id;
}
public void setId(int id){
this.id=id;
}
public int getIdOnline(){
return this.id;
}
public void setIdOnline(int id){
this.id=id;
}
public String getType(){
return this.type;
}
public void setType(String type){
this.type=type;
}
public int getIdReference(){
return this.id_reference;
}
public void setIdReference(int id_reference){
this.id_reference=id_reference;
}
public String getNumeroSerie(){
return this.numero_serie;
}
public void setNumeroSerie(String numero_serie){
this.numero_serie=numero_serie;
}
public Timestamp getDateAjout(){
return this.date_ajout;
}
public void setDateAjout(Timestamp date_ajout){
this.date_ajout=date_ajout;
}
public String getMarque(){
return this.marque;
}
public void setMarque(String marque){
this.marque=marque;
}
public String getModele(){
return this.modele;
}
public void setModele(String modele){
this.modele=modele;
}
public float getPrixVente(){
return this.prix_vente;
}
public void setPrixVente(float prix){
this.prix_vente=prix;
}
public double getPrixHT(){
return this.prixHT;
}
public void setPrixHT(double prix){
this.prixHT=prix;
}
public float getTVA(){
return this.tva;
}
public void setTVA(float tva){
this.tva=tva;
}
public String getEtatProduit(){
return this.etat_produit;
}
public void setEtatProduit(String etat){
this.etat_produit=etat;
}
public int getIdMagasin(){
return this.id_magasin;
}
public void setIdMagasin(int id_magasin){
this.id_magasin=id_magasin;
}
}
class Produit :
package com.stationphone.db.model;
import java.io.Serializable;
import java.sql.Timestamp;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinColumns;
import javax.persistence.ManyToOne;
import javax.persistence.OneToOne;
/**
*
* #author Administrateur
*/
#Entity
public class Produit implements Serializable {
#EmbeddedId
private ProduitMagasin idPM;
#OneToOne
#JoinColumn(name = "id_magasin", insertable=false, updatable=false)
Magasin magasin;
public enum Type {
PIECES {
public String getString() {
return "pièces detachées";
}
},
VENTE {
public String getString() {
return "vente en magasin";
}
};
public abstract String getString();
}
private String type;
private int id_reference;
private String numero_serie;
private Timestamp date_ajout;
private float prix_vente;
private float tva;
private String etat_produit;
public ProduitMagasin getIdPM(){
return this.idPM;
}
public void setIdPM(ProduitMagasin id){
this.idPM=id;
}
public String getType(){
return this.type;
}
public void setType(String type){
this.type=type;
}
public int getIdReference(){
return this.id_reference;
}
public void setIdReference(int id_reference){
this.id_reference=id_reference;
}
public String getNumeroSerie(){
return this.numero_serie;
}
public void setNumeroSerie(String numero_serie){
this.numero_serie=numero_serie;
}
public Timestamp getDateAjout(){
return this.date_ajout;
}
public void setDateAjout(Timestamp date_ajout){
this.date_ajout=date_ajout;
}
public float getPrixVente(){
return this.prix_vente;
}
public void setPrixVente(float prix){
this.prix_vente=prix;
}
public float getTVA(){
return this.tva;
}
public void setTVA(float tva){
this.tva=tva;
}
public String getEtatProduit(){
return this.etat_produit;
}
public void setEtatProduit(String etat){
this.etat_produit=etat;
}
}
I hope i'll find an answer here. Thanks.
EDIT : the post method :
public static HttpResponse post(Object object, String type){
HttpResponse response=null;
try{
CloseableHttpClient client = HttpClientBuilder.create().build();
HttpPost postRequest = new HttpPost(getUrl(type));
System.out.println(getUrl(type));
ObjectMapper mapper= new ObjectMapper();
String jsonInString = mapper.writeValueAsString(object);
System.out.println(jsonInString);
StringEntity input = new StringEntity(jsonInString);
input.setContentType("application/json");
postRequest.setEntity(input);
response = client.execute(postRequest);
if (response.getStatusLine().getStatusCode() != 201) {
throw new RuntimeException("Failed : HTTP error code : "
+ response.getStatusLine().getStatusCode());
}
BufferedReader br = new BufferedReader(
new InputStreamReader((response.getEntity().getContent())));
String output;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}
System.out.println(response.getStatusLine().getStatusCode()+" ");
client.close();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally{
return response;
}
EDIT 2 : the error on tomcat local :
018-07-24 18:55:32.196 WARN 10860 --- [nio-8084-exec-3] .w.s.m.s.DefaultHandlerExceptionResolver : Failed to read HTTP
message:
org.springframework.http.converter.HttpMessageNotReadableException:
JSON parse error: Invalid UTF-8 middle byte 0x63
at [Source: (PushbackInputStream); line: 1, column: 21]; nested
exception is com.fasterxml.jackson.databind.JsonMappingException:
Invalid UTF-8 middle byte 0x63
at [Source: (PushbackInputStream); line: 1, column: 21]
at [Source: (PushbackInputStream); line: 1, column: 16] (through
reference
chain: com.stationphone.db.model.ProduitDTO["type"])
Thanks tp billy frost what to do 2 things :
HttpPost postRequest = new HttpPost(getUrl(type));
postRequest.setHeader("Content-Type", "application/json;charset=UTF-8");
StringEntity input = new StringEntity(jsonInString, "UTF-8");
I'm learning GWT and currently I'm struggeling with RPC. I have a simple Project: a Label, a Textbox, an outputLabel and a Button.
I want when the user enters his Name in the TextBox and press the "send" Button he will get a Message from the Server "Hello "+name+"Here speaks the Server" - stupid example.
However in my CLient I have a package GUI and a Package Service and my entrypoint class
public class TestGwt270 implements EntryPoint {
public void onModuleLoad()
{
TestGwt270ClientImpl clientImpls = new TestGwt270ClientImpl("/TestGwt270/testgwt270service");
GWT.log("Main "+GWT.getModuleBaseURL() );
RootPanel.get().add(clientImpls.getMainGUI());
}
MyGui:
public class MainGUI extends Composite
{
private TestGwt270ClientImpl serviceImpl;
private VerticalPanel vPanel;
private TextBox inputTB;
private Label outputLbl;
public MainGUI(TestGwt270ClientImpl serviceImpl)
{
this.vPanel = new VerticalPanel();
initWidget(vPanel);
this.inputTB = new TextBox();
this.inputTB.setText("Gib deinen Namen ein");
this.outputLbl = new Label("Hier kommt der output");
this.vPanel.add(this.inputTB);
this.vPanel.add(this.outputLbl);
Button sendBtn = new Button("send");
sendBtn.addClickHandler(new MyClickhandler());
this.vPanel.add(sendBtn);
}
public void updateOutputLbl(String output)
{
this.outputLbl.setText(output);
}
private class MyClickhandler implements ClickHandler
{
#Override
public void onClick(ClickEvent event) {
// TODO Auto-generated method stub
serviceImpl.sayHello(inputTB.getText());
}
}
}
TheService:
#RemoteServiceRelativePath("testgwt270service")
public interface TestGwt270Service extends RemoteService
{
String sayHello(String name);
}
AsyncService:
public interface TestGwt270ServiceAsync
{
void sayHello(String name, AsyncCallback<String> callback);
}
ClientInterface:
public interface TestGwt270ServiceClientInt
{
void sayHello(String name);
}
Client Implementation:
public class TestGwt270ClientImpl implements TestGwt270ServiceClientInt
{
private TestGwt270ServiceAsync service;
private MainGUI maingui;
public TestGwt270ClientImpl(String url)
{
GWT.log(url);
// TODO Auto-generated constructor stub
this.service = GWT.create(TestGwt270Service.class);
ServiceDefTarget endpoint = (ServiceDefTarget) this.service;
endpoint.setServiceEntryPoint(url);
this.maingui = new MainGUI(this);
}
public MainGUI getMainGUI()
{
return this.maingui;
}
#Override
public void sayHello(String name) {
// TODO Auto-generated method stub
this.service.sayHello(name, new MyCallback());
}
private class MyCallback implements AsyncCallback<String>
{
#Override
public void onFailure(Throwable arg0) {
// TODO Auto-generated method stub
GWT.log("Failure");
maingui.updateOutputLbl("An Error has occured");
}
#Override
public void onSuccess(String arg0) {
// TODO Auto-generated method stub
GWT.log("Success");
maingui.updateOutputLbl(arg0);
}
}
}
ServerSideCode:
public class TestGwt270ServiceImpl extends RemoteServiceServlet implements TestGwt270Service
{
#Override
public String sayHello(String name) {
// TODO Auto-generated method stub
GWT.log("Hello " + name + "\nHier spricht der Server mit dir");
return "Hello " + name + "\nHier spricht der Server mit dir";
}
}
My Problem is, when I press the Button to send my Name to the server I get following Error:
HandlerManager.java:129 Uncaught com.google.gwt.event.shared.UmbrellaException: Exception caught: (TypeError) : Cannot read property 'sayHello_2_g$' of undefined
I don't know where this Error comes from and I hope you can help me.
I found the answer myself - I made a simple mistake:
In the class MyGUI I got this:
public class MainGUI extends Composite
{
private TestGwt270ClientImpl serviceImpl;
...
public MainGUI(TestGwt270ClientImpl serviceImpl)
{
...
I forgot to assign the serviceImpl
the Fix:
public class MainGUI extends Composite
{
private TestGwt270ClientImpl serviceImpl;
...
public MainGUI(TestGwt270ClientImpl serviceImpl)
{
this.serviceImpl = serviceImpl; //this line is the solution to my problem
...
In Rhino, I have a Scriptable bean like below
/**
*
*/
package test.rhino;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import org.mozilla.javascript.FunctionObject;
import org.mozilla.javascript.Scriptable;
/**
* #author
*
*/
public class SomeBean implements Scriptable, Map<String,Object> {
/**
* The current values for this object.
*/
private HashMap<String, Object> values = new HashMap<>();
/**
*
*/
public SomeBean() {
System.out.println("SomeBean();");
}
/*
* #see org.mozilla.javascript.Scriptable#getClassName()
*/
#Override
public String getClassName() {
return "SomeBean";
}
/*
* #see org.mozilla.javascript.Scriptable#get(java.lang.String,
* org.mozilla.javascript.Scriptable)
*/
#Override
public Object get(String name, Scriptable start) {
System.out.println("Get is called.");
System.out.println("Called for this" + name + " and returned :" + values.get(name));
return values.get(name);
}
/*
* #see org.mozilla.javascript.Scriptable#put(java.lang.String,
* org.mozilla.javascript.Scriptable, java.lang.Object)
*/
#Override
public void put(String name, Scriptable start, Object value) {
System.out.println("Put is called. Input name: " + name + "\n Input values: " + value);
values.put(name, value);
}
#Override
public Object get(int index, Scriptable start) {
// TODO Auto-generated method stub
return null;
}
#Override
public boolean has(String name, Scriptable start) {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean has(int index, Scriptable start) {
// TODO Auto-generated method stub
return false;
}
#Override
public void put(int index, Scriptable start, Object value) {
// TODO Auto-generated method stub
}
#Override
public void delete(String name) {
// TODO Auto-generated method stub
}
#Override
public void delete(int index) {
// TODO Auto-generated method stub
}
#Override
public Scriptable getPrototype() {
// TODO Auto-generated method stub
return null;
}
#Override
public void setPrototype(Scriptable prototype) {
// TODO Auto-generated method stub
}
#Override
public Scriptable getParentScope() {
// TODO Auto-generated method stub
return null;
}
#Override
public void setParentScope(Scriptable parent) {
// TODO Auto-generated method stub
}
#Override
public Object[] getIds() {
// TODO Auto-generated method stub
return null;
}
#Override
public Object getDefaultValue(Class<?> hint) {
// TODO Auto-generated method stub
return null;
}
#Override
public boolean hasInstance(Scriptable instance) {
// TODO Auto-generated method stub
return false;
}
#Override
public int size() {
// TODO Auto-generated method stub
return 0;
}
#Override
public boolean isEmpty() {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean containsKey(Object key) {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean containsValue(Object value) {
// TODO Auto-generated method stub
return false;
}
#Override
public Object get(Object key) {
System.out.println("MAP -- Get is called.");
// TODO Auto-generated method stub
return values.get(key);
}
#Override
public Object put(String key, Object value) {
values.put(key, value);
System.out.println("MAP -- Put is called.");
// TODO Auto-generated method stub
return value;
}
#Override
public Object remove(Object key) {
// TODO Auto-generated method stub
return null;
}
#Override
public void putAll(Map<? extends String, ? extends Object> m) {
// TODO Auto-generated method stub
}
#Override
public void clear() {
// TODO Auto-generated method stub
}
#Override
public Set<String> keySet() {
// TODO Auto-generated method stub
return null;
}
#Override
public Collection<Object> values() {
// TODO Auto-generated method stub
return null;
}
#Override
public Set<java.util.Map.Entry<String, Object>> entrySet() {
// TODO Auto-generated method stub
return null;
}
private static Scriptable globalPrototype;
public static void finishInit(Scriptable scope, FunctionObject constructor, Scriptable prototype) {
System.out.println("finishInit is called.");
globalPrototype = prototype;
}
}
I can retrieve this bean as a Scriptable object and pass it to the eval() function of a compiled script like below.
String src5 = "(function(){return Name;})();\n";
Script sc = getCompiledScript(src5);
SomeBean sb = new SomeBean();
sb.put("Name", "Matt Murdock");
Scriptable sp = (Scriptable) sb;
result = script.exec(context, sp);
The result print Matt Murdock. We can refer to properties directly here since SomeBean instance is passed as scope to the script execution.
I am unable to find an equivalent way in Nashorn. I can use the source to get a CompiledScript instance but i cannot add SomeBean to the binding without giving it a key and i cannot call its members ( Name ) directly in my JavaScript function. The below code throws error which is obvious since we cannot access the properties without the prefix key.
NSomeOtherBean nsob = new NSomeOtherBean(); // extends AbstractJSObject
nsob.setMember("Name", "Bruce Wayne");
Bindings binding = engine.createBindings();
binding.put("nsob", nsob);
engine.setBindings(binding, ScriptContext.GLOBAL_SCOPE);
result = engine.eval("(function(){return Name;})();\n",binding);
Is there a way in Nashorn to add properties of NSomeOtherBean instance to the scope and access them without using a prefix? like how we can do it in Rhino.
Nashorn equivalent of Rhino Scriptable is jdk.nashorn.api.scripting.JSObject
See javadoc:
https://docs.oracle.com/javase/8/docs/jdk/api/nashorn/jdk/nashorn/api/scripting/JSObject.html
https://docs.oracle.com/javase/8/docs/jdk/api/nashorn/jdk/nashorn/api/scripting/AbstractJSObject.html
Examples:
http://hg.openjdk.java.net/jdk9/dev/nashorn/file/efeb16c75392/samples/jsobj_example.js
http://hg.openjdk.java.net/jdk9/dev/nashorn/file/efeb16c75392/samples/BufferArray.java
http://hg.openjdk.java.net/jdk9/dev/nashorn/file/efeb16c75392/samples/jsobject_mapreduce.js
That said, java.util.Map instances are treated as "special" by Nashorn. i.e., Map keys can be accessed like object properties in Nashorn.
I am trying to define a javascript type using JsInterop but could not figure out how to define an array propery inside a type.
#JsType
public interface Task
{
// this works
#JsProperty String getTitle();
#JsProperty void setTitle(String title);
}
#JsType
public interface ViewModelInterface
{
// the following works
#JsProperty String getValue();
#JsProperty void setValue(String val);
// this does not work
#JsProperty Task[] getTasks();
#JsProperty void setTasks(Task[] tasks);
}
Is there any special syntax I should use?
Update:
I have come up with a temporary solution to the problem. I tried to use JNSI together with JsInterop and because the type define is javascript type we can add any property in that type after it is initialized.
The code is here
public class ViewModel implements ViewModelInterface
{
private String value;
public ViewModel()
{
value = "";
initTasksArray();
}
public String getValue() { return value; }
public void setValue(String val) { this.value = val; }
private native void initTasksArray()
/*-{
this.tasks =
[
{ title: 'Get high enough to grab the flag' },
{ title: 'Find the Princess' }
];
}*-/;
}
This way, the tasks property can be accessed from javascript as if it is defined as a #JsProperty. This is only a temporary solution and I am sure there will be a more proper one when JsInterop formally come out.
It should work as described.
Here is an example:
#JsType
public interface Task {
#JsProperty
String getTitle();
#JsProperty
void setTitle(String title);
public static Task getTask(String title) {
return new Task() {
private String title;
#Override
public String getTitle() {
return title;
}
#Override
public void setTitle(String title) {
this.title = title;
}
};
}
}
and
#JsType
public interface ViewModel {
#JsProperty
Task[] getTasks();
#JsProperty
void setTasks(Task[] tasks);
public static ViewModel getModel() {
return new ViewModel() {
Task[] tasks;
#Override
public void setTasks(Task[] tasks) {
this.tasks = tasks;
}
#Override
public Task[] getTasks() {
return tasks;
}
};
}
}
and the Javascript:
var model = ViewModel.getModel();
model.tasks = [Task.getTask('title1'), Task.getTask('title2')];
alert(model.tasks);