[Scilab-users] How to develop a Scilab-java application using apache-ant/apache-maven?

[scheiber]

How to develop a Scilab-java application using apache-ant/apache-maven?

Let us consider the following sample:
import org.scilab.modules.javasci.Scilab;
import org.scilab.modules.types.ScilabType;
import org.scilab.modules.types.ScilabDouble;

public class  TstJavaSci1{
  public static void main(String[] args){
    try{
      Scilab sci=new Scilab();
      if(sci.open()){       
        sci.exec(new String[]{"u=1","v=u+1","disp(v)"});
        sci.close();
      }
      else{
        System.out.println("Could not start Scilab ");
      }
    } 
    catch(org.scilab.modules.javasci.JavasciException e) {
      System.err.println("An exception occured: " +
e.getLocalizedMessage());
    }
  }
}
The execution may be carried out successfully with the following script
(Windows)
set SCILAB_HOME=c:\Program Files\scilab-5.4.0
set
SCILAB_PATH=%SCILAB_HOME%\modules\javasci\jar\org.scilab.modules.javasci.jar;%SCILAB_HOME%\modules\types\jar\org.scilab.modules.types.jar
set classpath=build;%SCILAB_PATH%;

rm build
md build
javac -d build src\TstJavaSci1.java
java TstJavaSci1
set SCILAB_HOME=c:\Program Files\scilab-5.4.0
set
SCILAB_PATH=%SCILAB_HOME%\modules\javasci\jar\org.scilab.modules.javasci.jar;%SCILAB_HOME%\modules\types\jar\org.scilab.modules.types.jar
set classpath=build;%SCILAB_PATH%;

rm build
md build
javac -d build src\TstJavaSci1.java
java TstJavaSci1
But if I tried to run with the apache-ant with the build.xml file
<?xml version='1.0' encoding='UTF-8'?>
<project name="proiect" basedir="." default="Run" > 
  <property name="lib.dir" value="lib"/>
  <property name="build.dir" value="build"/>
  
  <path id="pathref">
     <fileset dir="${lib.dir}">
       <include name="*.jar"/>
     </fileset> 
     <pathelement path="${build.dir}"/>
  </path>
  
  <target name="Init">
    <delete dir="${build.dir}"/>
    <mkdir dir="${build.dir}"/>
  </target>
  
  <target name="Compile" depends="Init">
     <javac srcdir="src" destdir="${build.dir}" 
        includeantruntime="false">
        <classpath refid="pathref" /> 
     </javac>
  </target>
  
  <target name="Run" depends="Compile" >
    <java classname="TstJavaSci1"  fork="true">
       <classpath refid="pathref" /> 
    </java>        
  </target> 
</project>
I get the following errors
Compile:
    [javac] Compiling 1 source file to
d:\mk\NumerJava\NumerJavaX\Cap_2\Scilabv540\ant\build

Run:
     [java] The native library javasci does not exist or cannot be found.
     [java] java.lang.UnsatisfiedLinkError: C:\Program
Files\scilab-5.4.0\bin\javasci.dll: The specified procedure could not be
found
     [java] 	at java.lang.ClassLoader$NativeLibrary.load(Native Method)
     [java] 	at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1939)
     [java] 	at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1864)
     [java] 	at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1854)
     [java] 	at java.lang.Runtime.loadLibrary0(Runtime.java:845)
     [java] 	at java.lang.System.loadLibrary(System.java:1084)
     [java] 	at org.scilab.modules.javasci.Call_ScilabJNI.<clinit>(Unknown
Source)
     [java] 	at
org.scilab.modules.javasci.Call_Scilab.SetFromJavaToON(Unknown Source)
     [java] 	at org.scilab.modules.javasci.Scilab.initScilab(Unknown Source)
     [java] 	at org.scilab.modules.javasci.Scilab.<init>(Unknown Source)
     [java] 	at org.scilab.modules.javasci.Scilab.<init>(Unknown Source)
     [java] 	at TstJavaSci1.main(Unknown Source)
     [java] Exception in thread "main" java.lang.UnsatisfiedLinkError:
org.scilab.modules.javasci.Call_ScilabJNI.SetFromJavaToON()V
     [java] 	at
org.scilab.modules.javasci.Call_ScilabJNI.SetFromJavaToON(Native Method)
     [java] 	at
org.scilab.modules.javasci.Call_Scilab.SetFromJavaToON(Unknown Source)
     [java] 	at org.scilab.modules.javasci.Scilab.initScilab(Unknown Source)
     [java] 	at org.scilab.modules.javasci.Scilab.<init>(Unknown Source)
     [java] 	at org.scilab.modules.javasci.Scilab.<init>(Unknown Source)
     [java] 	at TstJavaSci1.main(Unknown Source).
The PATH of the system contains the reference “C:\Program
Files\scilab-5.4.0\bin”, while the lib folder contains the two required
jars.

The same errors are obtained using apache-maven.




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