Helper InThrow

Jan Burse, created Sep 15. 2018
package example02;
import jekpro.platform.headless.ToolkitLibrary;
import jekpro.tools.call.Interpreter;
import jekpro.tools.call.InterpreterException;
import jekpro.tools.call.InterpreterMessage;
import jekpro.tools.term.Knowledgebase;
import jekpro.tools.term.TermCompound;
import java.io.IOException;
import java.io.Writer;
/**
* <p>Java code for the Call-in Exception Handling example.</p>
* <p/>
* Warranty & Liability
* To the extent permitted by applicable law and unless explicitly
* otherwise agreed upon, XLOG Technologies GmbH makes no warranties
* regarding the provided information. XLOG Technologies GmbH assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies GmbH.
* <p/>
* Rights & License
* All industrial property rights regarding the information - copyright
* and patent rights in particular - are the sole property of XLOG
* Technologies GmbH. If the company was not the originator of some
* excerpts, XLOG Technologies GmbH has at least obtained the right to
* reproduce, change and translate the information.
* <p/>
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
* <p/>
* Restrictions
* Only to be distributed with programs that add significant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
* <p/>
* Trademarks
* Jekejeke is a registered trademark of XLOG Technologies GmbH.
*/
public final class InThrow {
/**
* <p>Runtime library variant of executing the example.</p>
*
* @param args The command line arguments.
* @throws InterpreterException Exception in Jekejeke Prolog execution.
* @throws InterpreterMessage Message in Jekejeke Prolog execution.
* @throws IOException Problem writing to current output.
*/
public static void main(String[] args) throws InterpreterMessage,
InterpreterException, IOException {
Knowledgebase know = new Knowledgebase(ToolkitLibrary.DEFAULT);
Interpreter inter = know.iterable();
Knowledgebase.initKnowledgebase(inter);
inter.setProperty(ToolkitLibrary.PROP_BASE_URL,
"/Projects/Jekejeke/Prototyping/samples/jekrun/interface/");
Object consultGoal = inter.parseTerm("consult('example02/throwin.p')");
inter.iterator(consultGoal).next().close();
try {
Object throwGoal = "throw_ball";
inter.iterator(throwGoal).next().close();
} catch (InterpreterException capturedException) {
Object exceptionTerm = capturedException.getValue();
if (exceptionTerm instanceof TermCompound &&
((TermCompound) exceptionTerm).getArity() == 1 &&
((TermCompound) exceptionTerm).getFunctor().equals("ball")) {
Writer wr = (Writer)
inter.getProperty(ToolkitLibrary.PROP_SYS_CUR_OUTPUT);
wr.write(inter.unparseTerm(0,
((TermCompound) exceptionTerm).getArgWrapped(0)));
wr.write('\n');
wr.flush();
}
}
}
}

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