I'm trying to use Mozilla Rhino in my Java application for Android to evaluate some JavaScript. I am using Eclipse + ADT plugin.
First I tried simply downloading the Rhino .jar file from Mozilla's website and adding it to the project as a library in Eclipse. Eclipse recognised it fine and compiled the application. However, when running it I get an exception when calling Context.evaluateReader() (see below for stack trace).
Then I tried adding the Rhino source code as a separate Android project in Eclipse, marking it as a library and referencing it in my project, which was enough to get Eclipse to get it to compile, but led to the same error.
This is the stacktrace I get (java.lang.UnsupportedOperationException: can't load this type of class file)
Thread [<7> Thread-8] (Suspended (exception UnsupportedOperationException))
DefiningClassLoader(ClassLoader).defineClass(String, byte[], int, int, ProtectionDomain) line: 338
DefiningClassLoader.defineClass(String, byte[]) line: 62
Codegen.defineClass(Object, Object) line: 159
Codegen.createScriptObject(Object, Object) line: 114
Context.compileImpl(Scriptable, Reader, String, String, int, Object, boolean, Evaluator, ErrorReporter) line: 2440
Context.compileReader(Reader, String, int, Object) line: 1326
Context.compileReader(Scriptable, Reader, String, int, Object) line: 1298
Context.evaluateReader(Scriptable, Reader, String, int, Object) line: 1137
TimetableProcessor.evaluate(InputStream, String, String[]) line: 31
TimetableProcessor.processBasicData(InputStream, String) line: 58
TimetableProcessor.process(InputStream, String) line: 52
TimetableUpdater.update() line: 53
Main$1$1.run() line: 22
The bit of my code that hits the exception looks like this:
Context cx = Context.enter();
cx.setLanguageVersion(Context.VERSION_1_7);
Scriptable scope = cx.initStandardObjects();
try {
Object result = cx.evaluateReader(scope, new InputStreamReader(data), /* <<< exception here */
filename, 0, null);
} catch (IOException e) {
// ...
}
I also found this blog post which contains similar code and says it works. The author says he used a jar file from the Android Scripting site. The only jar file I found there was in rhino_extras_r3.zip. However, it doesn't contain .class files but rather a classes.dex file. When I added this as a library in Eclipse, it didn't recognise the classes it contains and thus failed to compile my project because of the missing references to Rhino classes.
Any help at all on how to get this to work is appreciated!
I finally got it to work. I should have paid more close attention to that blog post I linked.
If I add the line
cx.setOptimizationLevel(-1);
to disable optimisations, everything works perfectly.
An Android-compatible edition of rhino1_7R2.jar is available on the SL4A site, in the version control system. Here is a sample project that wraps up Rhino and BeanShell into an Android interpreter service.
I've written a library which allows to run Rhino on Android.
Advantages include:
Rhino can only run on optimization level -1. The library supports all levels.
The library supports the use of JavaAdapter, which is not possible with base Rhino.
Altough i did not benchmark this, it should give a performance increase. (Compiled code is faster than interpreted code)
https://github.com/F43nd1r/rhino-android
Related
When I package my stand-alone-java-application, that compiles, renders and prints Jasper-Reports, in a fat jar with all dependencies, I get the error that the function TEXT – a function used in the report and defined in the net.sf.jasperreports-functions-library is not found.
The method TEXT(Integer, String) is undefined for the type [...]
value = IF(LEN(TEXT(((java.lang.Integer)parameter_X.getValue()),"#"))==2,"***",REPT("*",6-LEN(TEXT(((java.lang.Integer)parameter_X.getValue()),"#")))) //$JR_EXPR_ID=58$
Other functions from the same library work. When I run the application with gradle run, the function is found and the report can be printed. The library is on my classpath.
There are several similar questions on this site and Stackoverflow, but neither provided answers, that worked for me. In the following, I will explain what I tried:
In my build.gradle-File I defined dependencies to the following libraries:
implementation('net.sf.jasperreports:jasperreports:6.18.1')
implementation('net.sf.jasperreports:jasperreports-functions:6.18.1')
In my java-Files, I created a DesignFile and statically imported the functions into it. I tried two methods:
Method 1 as given in an answer in this thread: Unresolved symbols when compiling jasper report
/*…*/
designFile = JRXmlLoader.load(sourceFile.getAbsolutePath());
designFile.addImport("static net.sf.jasperreports.functions.standard.TextFunctions.*");
designFile.addImport("static net.sf.jasperreports.functions.standard.MathFunctions.*");
designFile.addImport("static net.sf.jasperreports.functions.standard.DateTimeFunctions.*");
designFile.addImport("static net.sf.jasperreports.functions.standard.LogicalFunctions.*");
JasperReport compiledReport = JasperCompileManager.getInstance(ctx).compile(designFile);
/*…*/
Method 2: importing each function on its own
public static String[] textFunctions(){
return new String[]{"BASE", "CHAR", "CLEAN", "CODE", "CONCATENATE", "DOUBLE_VALUE",
"EXACT", "FIND", /*"FIXED", */"FLOAT_VALUE", "INTEGER_VALUE", "LEFT", "LEN", "LONG_VALUE",
"LOWER", "LTRIM", "MID", "PROPER", "REPLACE", "REPT", "RIGHT", "RTRIM", "SEARCH", "SUBSTITUTE",
"T", /*"TEXT",*/ "TRIM", "UPPER"};
}}
/*…*/
designFile = JRXmlLoader.load(sourceFile.getAbsolutePath());
for (String textFunction : textFunctions()){
designFile.addImport("static net.sf.jasperreports.functions.standard.TextFunctions." + textFunction);
}/* similarly for logical functions, numeric functions and datetime functions*/
}
JasperReport compiledReport = JasperCompileManager.getInstance(ctx).compile(designFile);
/*…*/
As you can see, the function TEXT is commented out. That’s because the program fails at runtime when run with “gradle run”, when I comment it in:
net.sf.jasperreports.engine.JRException: Errors were encountered when compiling report expressions class file:
1. The import net.sf.jasperreports.functions.standard.TextFunctions.TEXT cannot be resolved
import static net.sf.jasperreports.functions.standard.TextFunctions.TEXT;
The same thing is true with most datetime-functions, in fact, only TIME can be imported to the DesignObject without error at runtime
In addition to that, when I type net.sf.jasperreports.functions.standard.TextFunctions. in my IDE, the content-assist shows a list of available functions, yet TEXT is missing.
I suspected, that the function is simply missing in the library, but it is there. In the .gradle/cache/modules-2/files-2.1/… directory, there is the jar with the TextFunctions.java, that contains the function TEXT:
When building the FatJar with dependencies, I have a TextFunctions.class-File in it, that contains the TEXT-Function as well.
In my jar, there are two jasperreports_extension.properties on the root level:
with the smaller one (from the jasperreport-functions-dependency) containing the following lines:
net.sf.jasperreports.extension.registry.factory.functions=net.sf.jasperreports.functions.FunctionsRegistryFactory
net.sf.jasperreports.extension.functions.datetime=net.sf.jasperreports.functions.standard.DateTimeFunctions
net.sf.jasperreports.extension.functions.math=net.sf.jasperreports.functions.standard.MathFunctions, net.sf.jasperreports.functions.standard.LogicalFunctions
net.sf.jasperreports.extension.functions.text=net.sf.jasperreports.functions.standard.TextFunctions
net.sf.jasperreports.extension.functions.report=net.sf.jasperreports.functions.standard.ReportFunctions
Funnily enough, commenting out TEXT, running it locally with gradle run, it works without problems. But packaging it and running it with java -jar it fails to find this function. And statically importing this function leads to gradle run failing as well.
What is happening and how can I fix this? I want to distribute my FatJar on a server and run it, but this problems makes it impossible for me.
With reference to my previous question,
Executing a lisp function from Java
I was able to call lisp code from Java using ABCL.
But the problem is, the already existing lisp code uses CL-PPCRE package.
I can not compile the code as it says 'CL-PPCRE not found'.
I have tried different approaches to add that package,
including
1) how does one compile a clisp program which uses cl-ppcre?
2)https://groups.google.com/forum/#!topic/cl-ppcre/juSfOhEDa1k
Doesnot work!
Other thing is, that executing (compile-file aima.asd) works perfectly fine although it does also require cl-pprce
(defpackage #:aima-asd
(:use :cl :asdf))
(in-package :aima-asd)
(defsystem aima
:name "aima"
:version "0.1"
:components ((:file "defpackage")
(:file "main" :depends-on ("defpackage")))
:depends-on (:cl-ppcre))
The final java code is
interpreter.eval("(load \"aima/asdf.lisp\")");
interpreter.eval("(compile-file \"aima/aima.asd\")");
interpreter.eval("(compile-file \"aima/defpackage.lisp\")");
interpreter.eval("(in-package :aima)");
interpreter.eval("(load \"aima/aima.lisp\")");
interpreter.eval("(aima-load 'all)");
The error message is
Error loading C:/Users/Administrator.NUIG-1Z7HN12/workspace/aima/probability/domains/edit-nets.lisp at line 376 (offset 16389)
#<THREAD "main" {3A188AF2}>: Debugger invoked on condition of type READER-ERROR
The package "CL-PPCRE" can't be found.
[1] AIMA(1):
Can anyone help me?
You need to load cl-ppcre before you can use it. You can do that by using (asdf:load-system :aima), provided that you put both aima and cl-ppcre into locations that your ASDF searches.
I used QuickLisp to add cl-ppcre (because nothing else worked for me).
Here is what I did
(load \"~/QuickLisp.lisp\")")
(quicklisp-quickstart:install)
(load "~/quicklisp/setup.lisp")
(ql:quickload :cl-ppcre)
First 2 lines are only a one time things. Once quickLisp is installed you can start from line 3.
I have a problem while transforming the xslt to pdf in java, i am following the same process posted in this link
"Java Transformation to PDF".
Error:
`
Caused by: java.lang.NoSuchMethodError: org.apache.xmlgraphics.java2d.GraphicContext.<init>(Lorg/apache/xmlgraphics/java2d/GraphicContext;)V
at org.apache.fop.render.intermediate.IFGraphicContext.<init>(IFGraphicContext.java:50)
at org.apache.fop.render.intermediate.IFGraphicContext.clone(IFGraphicContext.java:56)
at org.apache.fop.render.intermediate.IFRenderer.saveGraphicsState(IFRenderer.java:632)
at org.apache.fop.render.intermediate.IFRenderer.startViewport(IFRenderer.java:885)
at org.apache.fop.render.intermediate.IFRenderer.startVParea(IFRenderer.java:878)
at org.apache.fop.render.AbstractRenderer.renderRegionViewport(AbstractRenderer.java:289)
at org.apache.fop.render.intermediate.IFRenderer.renderRegionViewport(IFRenderer.java:731)
at org.apache.fop.render.AbstractRenderer.renderPageAreas(AbstractRenderer.java:249)
at org.apache.fop.render.AbstractRenderer.renderPage(AbstractRenderer.java:230)
at org.apache.fop.render.intermediate.IFRenderer.renderPage(IFRenderer.java:580)
at org.apache.fop.area.RenderPagesModel.addPage(RenderPagesModel.java:114)
at org.apache.fop.layoutmgr.AbstractPageSequenceLayoutManager.finishPage(AbstractPageSequenceLayoutManager.java:312)
at org.apache.fop.layoutmgr.PageSequenceLayoutManager.finishPage(PageSequenceLayoutManager.java:167)
at org.apache.fop.layoutmgr.PageSequenceLayoutManager.activateLayout(PageSequenceLayoutManager.java:109)
at org.apache.fop.area.AreaTreeHandler.endPageSequence(AreaTreeHandler.java:238)
at org.apache.fop.fo.pagination.PageSequence.endOfNode(PageSequence.java:120)
at org.apache.fop.fo.FOTreeBuilder$MainFOHandler.endElement(FOTreeBuilder.java:349)
at org.apache.fop.fo.FOTreeBuilder.endElement(FOTreeBuilder.java:177)
at net.sf.saxon.event.ContentHandlerProxy.endElement(ContentHandlerProxy.java:391)
at net.sf.saxon.event.ProxyReceiver.endElement(ProxyReceiver.java:174)
at net.sf.saxon.event.NamespaceReducer.endElement(NamespaceReducer.java:213)
at net.sf.saxon.event.ComplexContentOutputter.endElement(ComplexContentOutputter.java:417)
at net.sf.saxon.instruct.ElementCreator.processLeavingTail(ElementCreator.java:301)
at net.sf.saxon.instruct.Block.processLeavingTail(Block.java:409)
at net.sf.saxon.instruct.Instruction.process(Instruction.java:94)
at net.sf.saxon.instruct.ElementCreator.processLeavingTail(ElementCreator.java:298)
at net.sf.saxon.instruct.Template.applyLeavingTail(Template.java:175)
at net.sf.saxon.instruct.ApplyTemplates.applyTemplates(ApplyTemplates.java:343)
at net.sf.saxon.Controller.transformDocument(Controller.java:1736)
at net.sf.saxon.Controller.transform(Controller.java:1560)
at mypackage.v2.business.pdf.XMLtoPDF.convertXMLPDF(XMLtoPDF.java:103)
... 51 more
java.lang.ClassCastException: java.lang.NoSuchMethodError cannot be cast to java.lang.Exception
`
Please let me know what could be the problem.
As described in the documentation
Thrown if an application tries to call a specified method of a class (either static or instance), and that class no longer has a definition of that method.
Here's how this can happen. Imagine you built some code that used a library with a method called foo(). You compiled your project and then later decided to upgrade the library. You do this by overwriting the old jar file with the new one. You don't recompile your code.
But what you didn't know is the new library removed the foo() method. Now if you run your code, it will throw this exception because your compile code calls this method and it's no longer there.
In your specific case, this isn't necessarily your code with the problem. It could be that you have one library that uses another library and the problem is there (for example, Library X uses version 2 of Library Y, but you only have Library Y version 1 in your classpath). If this is happening, you need to make sure the libraries are using the version they expect.
For your specific problem, you need to find the version of the jar that has org.apache.xmlgraphics.java2d.GraphicContext in it and it needs to have a constructor that takes a... list of org/apache/xmlgraphics/java2d/GraphicContext... maybe. I forget what (L...;)V means.
I've seen other posts about this but I still couldn't get it to work.
http://snowball.tartarus.org/dist/libstemmer_java.tgz <<- this contains the java implementation of the porter2 algorithm.
What I did was extract the contents on my desktop (for easy access) and opened its .java file using Netbeans IDE. I ran it but it returned an error.
Netbeans doesn't read the other java files. Since all the java files are connected to each other, one error from javaX file produces error on javaY file and so on.
TestApp.java is the one which should be ran. But the following errors occur. See the screenshots.
Here are the screenshots:
http://img248.imageshack.us/img248/290/java1.jpg
http://img4.imageshack.us/img4/5196/java2l.jpg
http://img441.imageshack.us/img441/8625/java3i.jpg
I cannot see your images any longer. The ext folder will not compile because of 3 unreachable statements in frenchStemmer.java. They can easily be removed, or just delete the entire file if you are not using french.
case 13:
// (, line 155
// call RV, line 155
if (!r_RV())
{
return false;
}
// fail, line 155
// (, line 155
// <-, line 155
slice_from("ant");
return false;
break; <<<- remove this
I compiled and ran in the free Community Edition of Intellij, and also using the command line.
I have received a project with many lines like the following ones:
HtmlOutputText content = new HtmlOutputText();
ValueBinding vb = dashBoardBean.getApplication()
.createValueBinding(columnas[cont][1]);
content.setValueBinding("value", vb);
Eclipse, with Java 5, marks them as deprecated (both class ValueBindingand the method setValueBinding).
So I looked the API for HtmlCommandLink.setValueBinding() (it actually is at UIComponentBase) and found this:
Deprecated. This has been replaced by UIComponent.setValueExpression(java.lang.String, javax.el.ValueExpression).
So I changed the last line code to the following:
content.setValueExpression("value", null);
But now I get a compiler error.
I also tried:
UIComponent uic;
uic.setValueExpression("", null);
And get the same error:
The type javax.el.ValueExpression cannot be resolved. It is indirectly referenced from
required .class files
What's the meaning of that error? How can I solve it?
You need the JSF 1.2 (or greater) jars on your classpath.