Executing tiny programming language compiled byte code with the JVM

Hello,
For a project, I am developing a simple programming language, with a syntax not unlike Pascal, which compiles to Java Byte Code. Currently I execute the compiled byte code using my own interpreter. This works OK, but what I'd like to do now is to execute the compiled byte code using the actual existing JVM. The compiled byte code resides in a text file upon compilation of a sample program written in my tiny programming language. Does anyone know how I may start to go about this? Thanks in advance.
adam

The only way of getting a standard Java virtual machine to execute your java byte code, is to wrap it up into a completely valid java class file.
Any constants you use, must be put into the classes constant pool.
Any local variables will have to go into the local variable table of the method which uses them... etc, etc.
Something like ASM, would let you dynamically create a Java class file.
http://asm.objectweb.org/
regards,
Owen

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Edited by: Polat on 14.Mar.2012 09:09

>
Is pl/sql programming language compiler or interpreter language?
>
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See Compiling PL/SQL Units for Native Execution in the PL/SQL Language Doc
http://docs.oracle.com/cd/E18283_01/appdev.112/e17126/tuning.htm#sthref1023
>
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>
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>
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g++ -o DOMSample -I../include DOMSample.cpp -L../lib/xml8 -L../lib/core8 -L../lib/nls8 -L../lib/xmlc8 -L../lib/nsl -L../lib/socket
Undefined first referenced
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Node::getName(void) /var/tmp/ccarlA8y.o
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XMLParser::xmlparse(unsigned char *, unsigned char *, unsigned int)/var/tmp/ccarlA8y.o
Node::getType(void) /var/tmp/ccarlA8y.o
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null

I have the similar problem when I tried to compile sample code with C++ parser on WinNT4. I am using Micrsoft Visual Studio V6.0. I added the include file and lib file in the path.
Here are the error messages:
Linking...
FullDOM.obj : error LNK2001: unresolved external symbol "public: void __thiscall XMLParser::xmlterm(void)" (?xmlterm@XMLParser@@QAEXXZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class NamedNodeMap * __thiscall DocumentType::getEntities(void)" (?getEntities@DocumentType@@QAEPAVNamedNodeMap@@XZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Node * __thiscall NamedNodeMap::item(unsigned int)" (?item@NamedNodeMap@@QAEPAVNode@@I@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: unsigned int __thiscall NamedNodeMap::getLength(void)" (?getLength@NamedNodeMap@@QAEIXZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class NamedNodeMap * __thiscall DocumentType::getNotations(void)" (?getNotations@DocumentType@@QAEPAVNamedNodeMap@@XZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class DocumentType * __thiscall XMLParser::getDocType(void)" (?getDocType@XMLParser@@QAEPAVDocumentType@@XZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: unsigned int __thiscall XMLParser::xmlparse(unsigned char *,unsigned char *,unsigned int)" (?xmlparse@XMLParser@@QAEIPAE0I@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: void __thiscall XMLParser::xmlclean(void)" (?xmlclean@XMLParser@@QAEXXZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: void __thiscall CharacterData::replaceData(unsigned long,unsigned long,unsigned char *)" (?replaceData@CharacterData@@QAEXKKPAE@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: void __thiscall CharacterData::deleteData(unsigned long,unsigned long)" (?deleteData@CharacterData@@QAEXKK@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: void __thiscall CharacterData::insertData(unsigned long,unsigned char *)" (?insertData@CharacterData@@QAEXKPAE@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: void __thiscall CharacterData::appendData(unsigned char *)" (?appendData@CharacterData@@QAEXPAE@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: unsigned char * __thiscall CharacterData::substringData(unsigned long,unsigned long)" (?substringData@CharacterData@@QAEPAEKK@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: unsigned int __thiscall CharacterData::getLength(void)" (?getLength@CharacterData@@QAEIXZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: void __thiscall CharacterData::setData(unsigned char *)" (?setData@CharacterData@@QAEXPAE@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: unsigned char * __thiscall CharacterData::getData(void)" (?getData@CharacterData@@QAEPAEXZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Node * __thiscall Text::splitText(unsigned long)" (?splitText@Text@@QAEPAVNode@@K@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Node * __thiscall Node::cloneNode(int)" (?cloneNode@Node@@QAEPAV1@H@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Node * __thiscall NamedNodeMap::removeNamedItem(unsigned char *)" (?removeNamedItem@NamedNodeMap@@QAEPAVNode@@PAE@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: int __thiscall NamedNodeMap::setNamedItem(class Node *,class Node * *)" (?setNamedItem@NamedNodeMap@@QAEHPAVNode@@PAPAV2@@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class NamedNodeMap * __thiscall Node::getAttributes(void)" (?getAttributes@Node@@QAEPAVNamedNodeMap@@XZ)
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FullDOM.obj : error LNK2001: unresolved external symbol "public: class Attr * __thiscall Element::setAttribute(unsigned char *,unsigned char *)" (?setAttribute@Element@@QAEPAVAttr@@PAE0@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: void __thiscall Element::removeAttribute(unsigned char *)" (?removeAttribute@Element@@QAEXPAE@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Attr * __thiscall Element::getAttributeNode(unsigned char *)" (?getAttributeNode@Element@@QAEPAVAttr@@PAE@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: void __thiscall Attr::setValue(unsigned char *)" (?setValue@Attr@@QAEXPAE@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: int __thiscall Element::setAttributeNode(class Attr *,class Attr * *)" (?setAttributeNode@Element@@QAEHPAVAttr@@PAPAV2@@Z)
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FullDOM.obj : error LNK2001: unresolved external symbol "public: class DocumentFragment * __thiscall Document::createDocumentFragment(void)" (?createDocumentFragment@Document@@QAEPAVDocumentFragment@@XZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: void __thiscall Element::normalize(void)" (?normalize@Element@@QAEXXZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Node * __thiscall Node::removeChild(void)" (?removeChild@Node@@QAEPAV1@XZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Node * __thiscall Node::replaceChild(class Node *)" (?replaceChild@Node@@QAEPAV1@PAV1@@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Document * __thiscall Node::getOwnerDocument(void)" (?getOwnerDocument@Node@@QAEPAVDocument@@XZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Node * __thiscall Node::getParentNode(void)" (?getParentNode@Node@@QAEPAV1@XZ)
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FullDOM.obj : error LNK2001: unresolved external symbol "public: void __thiscall Node::setValue(unsigned char *)" (?setValue@Node@@QAEXPAE@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Node * __thiscall Node::getPreviousSibling(void)" (?getPreviousSibling@Node@@QAEPAV1@XZ)
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FullDOM.obj : error LNK2001: unresolved external symbol "public: class Node * __thiscall Node::getNextSibling(void)" (?getNextSibling@Node@@QAEPAV1@XZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Node * __thiscall Node::getFirstChild(void)" (?getFirstChild@Node@@QAEPAV1@XZ)
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FullDOM.obj : error LNK2001: unresolved external symbol "public: class EntityReference * __thiscall Document::createEntityReference(unsigned char *)" (?createEntityReference@Document@@QAEPAVEntityReference@@PAE@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class CDATASection * __thiscall Document::createCDATASection(unsigned char *)" (?createCDATASection@Document@@QAEPAVCDATASection@@PAE@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class ProcessingInstruction * __thiscall Document::createProcessingInstruction(unsigned char *,unsigned char *)" (?createProcessingInstruction@Document@@QAEPAVProcessingInstruction@@PA
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FullDOM.obj : error LNK2001: unresolved external symbol "public: class Comment * __thiscall Document::createComment(unsigned char *)" (?createComment@Document@@QAEPAVComment@@PAE@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Text * __thiscall Document::createTextNode(unsigned char *)" (?createTextNode@Document@@QAEPAVText@@PAE@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Element * __thiscall XMLParser::getDocumentElement(void)" (?getDocumentElement@XMLParser@@QAEPAVElement@@XZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Node * __thiscall Node::appendChild(class Node *)" (?appendChild@Node@@QAEPAV1@PAV1@@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Element * __thiscall Document::createElement(unsigned char *)" (?createElement@Document@@QAEPAVElement@@PAE@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Document * __thiscall XMLParser::getDocument(void)" (?getDocument@XMLParser@@QAEPAVDocument@@XZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class Document * __thiscall XMLParser::createDocument(void)" (?createDocument@XMLParser@@QAEPAVDocument@@XZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: unsigned int __thiscall XMLParser::xmlinit(unsigned char *,void (__cdecl*)(void *,unsigned char const *,unsigned int),void *,struct xmlsaxcb *,void *,unsigned char *)" (?xmlinit@XMLPar
ser@@QAEIPAEP6AXPAXPBEI@Z1PAUxmlsaxcb@@10@Z)
FullDOM.obj : error LNK2001: unresolved external symbol "public: unsigned int __thiscall Node::numChildNodes(void)" (?numChildNodes@Node@@QAEIXZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: class NodeList * __thiscall Node::getChildNodes(void)" (?getChildNodes@Node@@QAEPAVNodeList@@XZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: int __thiscall Node::hasChildNodes(void)" (?hasChildNodes@Node@@QAEHXZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: unsigned char * __thiscall Attr::getValue(void)" (?getValue@Attr@@QAEPAEXZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: int __thiscall Attr::getSpecified(void)" (?getSpecified@Attr@@QAEHXZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: unsigned char * __thiscall Attr::getName(void)" (?getName@Attr@@QAEPAEXZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: unsigned char * __thiscall Node::getValue(void)" (?getValue@Node@@QAEPAEXZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: unsigned char * __thiscall Node::getName(void)" (?getName@Node@@QAEPAEXZ)
FullDOM.obj : error LNK2001: unresolved external symbol "public: short __thiscall Node::getType(void)" (?getType@Node@@QAEFXZ)
LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16
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orafulldom.exe - 65 error(s), 0 warning(s)
null

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>
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Last edited by SpeedVin (2010-03-01 17:30:56)

drcouzelis wrote:
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     public static void main(String[] args) {
          System.out.println("Hello World");
          Rectangle pageSize = new Rectangle(916, 1592);
                    pageSize.setBackgroundColor(new java.awt.Color(0xFF, 0xFF, 0xDE));
          // step 1: creation of a document-object
          //Document document = new Document(pageSize);
          Document document = new Document(pageSize, 132, 164, 108, 108);
          try {
               // step 2:
               // we create a writer that listens to the document
               // and directs a PDF-stream to a file
               PdfWriter writer =PdfWriter.getInstance(document,new FileOutputStream("c:\\weeklystatus.pdf"));
               writer.setEncryption(PdfWriter.STRENGTH128BITS, "Hello", "World", PdfWriter.AllowCopy | PdfWriter.AllowPrinting);
//               step 3: we open the document
                         document.open();
               Paragraph paragraph = new Paragraph("",new Font(Font.TIMES_ROMAN, 13, Font.BOLDITALIC, new Color(0, 0, 255)));
               POIFSFileSystem pofilesystem=new POIFSFileSystem(new FileInputStream("D:\\ESM\\plans\\weekly report(31-01..04-02).xls"));
               HSSFWorkbook hbook=new HSSFWorkbook(pofilesystem);
               HSSFSheet hsheet=hbook.getSheetAt(0);//.createSheet();
               Iterator rows = hsheet.rowIterator();
                              while( rows.hasNext() ) {
                                   Phrase phrase=new Phrase();
                                   HSSFRow row = (HSSFRow) rows.next();
                                   //System.out.println( "Row #" + row.getRowNum());
                                   // Iterate over each cell in the row and print out the cell's content
                                   Iterator cells = row.cellIterator();
                                   while( cells.hasNext() ) {
                                        HSSFCell cell = (HSSFCell) cells.next();
                                        //System.out.println( "Cell #" + cell.getCellNum() );
                                        switch ( cell.getCellType() ) {
                                             case HSSFCell.CELL_TYPE_STRING:
                                             String stringcell=cell.getStringCellValue ()+" ";
                                             writer.setSpaceCharRatio(PdfWriter.NO_SPACE_CHAR_RATIO);
                                             phrase.add(stringcell);
                                        // document.add(new Phrase(string));
                                                  System.out.print( cell.getStringCellValue () );
                                                  break;
                                             case HSSFCell.CELL_TYPE_FORMULA:
                                                       String stringdate=cell.getCellFormula()+" ";
                                                       writer.setSpaceCharRatio(PdfWriter.NO_SPACE_CHAR_RATIO);
                                                       phrase.add(stringdate);
                                             System.out.print( cell.getCellFormula() );
                                                       break;
                                             case HSSFCell.CELL_TYPE_NUMERIC:
                                             String string=String.valueOf(cell.getNumericCellValue())+" ";
                                                  writer.setSpaceCharRatio(PdfWriter.NO_SPACE_CHAR_RATIO);
                                                  phrase.add(string);
                                                  System.out.print( cell.getNumericCellValue() );
                                                  break;
                                             default:
                                                  //System.out.println( "unsuported sell type" );
                                                  break;
                                   document.add(new Paragraph(phrase));
                                   document.add(new Paragraph("\n \n \n"));
               // step 4: we add a paragraph to the document
          } catch (DocumentException de) {
               System.err.println(de.getMessage());
          } catch (IOException ioe) {
               System.err.println(ioe.getMessage());
          // step 5: we close the document
          document.close();
My Input from MS-Excel file is:
     Planning and Tracking Template for Interns
     Name of the Intern     N.Kesavulu Reddy
     Project Name     Enterprise Sales and Marketing
     Description     Estimated Effort in Hrs     Planned/Replanned          Actual          Actual Effort in Hrs     Complexity     Priority     LOC written new & modified     % work completion     Status     Rework     Remarks
S.No               Start Date     End Date     Start Date     End Date
1     setup the configuration          31/01/2005     1/2/2005     31/01/2005     1/2/2005
2     Deploying an application through Tapestry, Spring, Hibernate          2/2/2005     2/2/2005     2/2/2005     2/2/2005
3     Gone through Componentization and Cxprice application          3/2/2005     3/2/2005     3/2/2005     3/2/2005
4     Attend the sessions(tapestry,spring, hibernate), QBA          4/2/2005     4/2/2005     4/2/2005     4/2/2005
     The o/p I'm gettint in .pdf file is:
Planning and Tracking Template for Interns
N.Kesavulu Reddy Name of the Intern
Enterprise Sales and Marketing Project Name
Remarks Rework Status % work completion LOC written new & modified Priority
Complexity Actual Effort in Hrs Actual Planned/Replanned Estimated Effort in Hrs Description
End Date Start Date End Date Start Date S.No
38354.0 31/01/2005 38354.0 31/01/2005 setup the configuration 1.0
38385.0 38385.0 38385.0 38385.0 Deploying an application through Tapestry, Spring, Hibernate
2.0
38413.0 38413.0 38413.0 38413.0 Gone through Componentization and Cxprice application
3.0
38444.0 38444.0 38444.0 38444.0 Attend the sessions(tapestry,spring, hibernate), QBA 4.0
                                   The issues i'm facing are:
When it is reading a row from MS-Excel it is writing to the .pdf file from last cell to first cell.( 2 cell in 1 place, 1 cell in 2 place like if the row has two cells with data as : Name of the Intern: Kesavulu Reddy then it is writing to the .pdf file as Kesavulu Reddy Name of Intern)
and the second issue is:
It is not recognizing the date format..it is recognizing the date in first row only......
Plz Tell me wht is the solution for this...
Regards
[email protected]

Don't double post your question:
http://forum.java.sun.com/thread.jspa?threadID=617605&messageID=3450899#3450899
/Kaj

Strange issue with POF: byte array with the value 94

This is a somewhat strange issue we’ve managed to reduce to this test case. We’ve also seen similar issues with chars and shorts as well. It’s only a problem if the byte value inside the byte array is equal to 94! A value of 93, 95, etc, seems to be ok.
Given the below class, the byte values both in the array and the single byte value are wrong when deserializing. The value inside the byte array isn’t what we put in (get [75] instead of [94]) and the single byte value is null (not 114).
Pof object code:
package com.test;
import java.io.IOException;
import java.util.Arrays;
import com.tangosol.io.pof.PofReader;
import com.tangosol.io.pof.PofWriter;
import com.tangosol.io.pof.PortableObject;
public class PofObject1 implements PortableObject {
     private byte[] byteArray;
     private byte byteValue;
     public void setValues() {
          byteArray = new byte[] {94};
          byteValue = 114;
     @Override
     public void readExternal(PofReader reader) throws IOException {
          Object byteArray = reader.readObjectArray(0, null);
          Object byteValue = reader.readObject(1);
          System.out.println(Arrays.toString((Object[])byteArray));
          System.out.println(byteValue);
          if (byteValue == null) throw new IOException("byteValue is null!");
     @Override
     public void writeExternal(PofWriter writer) throws IOException {
          writer.writeObject(0, byteArray);
          writer.writeObject(1, byteValue);
Using writer.writeObjectArray(0, byteArray); instead of writer.writeObject(0, byteArray); doesn't help. In this case byteArray would be of type Object[] (as accessed through reflection).
This is simply put in to a distributed cache and then fetched back. No EPs, listeners or stuff like that involved:
     public static void main(String... args) throws Exception {
          NamedCache cache = CacheFactory.getCache("my-cache");
          PofObject1 o = new PofObject1();
          o.setValues();
          cache.put("key1", o);
          cache.get("key1");
Only tried it with Coherecne 3.7.1.3.
Cache config file:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE cache-config SYSTEM "cache-config.dtd">
<cache-config>
     <caching-scheme-mapping>
          <cache-mapping>
               <cache-name>my-cache</cache-name>
               <scheme-name>my-cache</scheme-name>
          </cache-mapping>
     </caching-scheme-mapping>
     <caching-schemes>
          <distributed-scheme>
               <scheme-name>my-cache</scheme-name>
               <service-name>my-cache</service-name>
               <serializer>
                    <class-name>
                         com.tangosol.io.pof.ConfigurablePofContext
                    </class-name>
                    <init-params>
                         <init-param>
                              <param-type>string</param-type>
                              <param-value>pof-config.xml</param-value>
                         </init-param>
                    </init-params>
               </serializer>
               <lease-granularity>thread</lease-granularity>
               <thread-count>10</thread-count>
               <backing-map-scheme>
                    <local-scheme>
                    </local-scheme>
               </backing-map-scheme>
               <autostart>true</autostart>
          </distributed-scheme>
     </caching-schemes>
</cache-config>
POF config file:
<?xml version="1.0"?>
<pof-config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="http://xmlns.oracle.com/coherence/coherence-pof-config"
     xsi:schemaLocation="http://xmlns.oracle.com/coherence/coherence-pof-config coherence-pof-config.xsd">
     <user-type-list>
          
          <include>coherence-pof-config.xml</include>
          <user-type>
               <type-id>1460</type-id>
               <class-name>com.test.PofObject1</class-name>
          </user-type>
     </user-type-list>
</pof-config>

Hi,
POF uses certain byte values as an optimization to represent well known values of certain Object types - e.g. boolean True and False, some very small numbers, null etc... When you do read/write Object instead of using the correct method I suspect POF gets confused over the type and value that the field should be.
There are a number of cases where POF does not know what the type is - Numbers would be one of these, for example if I stored a long of value 10 on deserialization POF would not know if that was an int, long double etc... so you have to use the correct method to get it back. Collections are another - If you serialize a Set all POF knows is that you have serialized some sort of Collection so unless you are specific when deserializing you will get back a List.
JK

Executing tiny programming language compiled byte code with the JVM

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