128 lines
2.5 KiB
Java
128 lines
2.5 KiB
Java
//package pt.up.fc.dcc.yap;
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import java.io.* ;
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//import YAP.* ;
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class JavaYAP {
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YAPQuery q;
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YAPEngine eng;
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InputStreamReader istream = new InputStreamReader(System.in) ;
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BufferedReader bufRead = new BufferedReader(istream) ;
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Boolean runQuery(String str)
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{
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try
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{
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q = eng.query( str );
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} catch(Exception e){
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System.out.println("Exception thrown :" + e);
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return false;
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}
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return continueQuery();
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}
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Boolean continueQuery()
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{
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try
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{
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Boolean rc;
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rc = q.next();
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if (!rc) {
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q.close();
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return false;
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}
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YAPListTerm vs = q.namedVars();
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System.out.println("Another one "+vs);
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while(!vs.nil()){
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YAPTerm eq = vs.car();
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//outputText.append(Integer.toString(i) + ": " + eq.text() );
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System.out.println(":\t" + eq.getArg(1).text() + " = " + eq.getArg(2).text() +"\n" );
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vs = vs.cdr();
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}
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return true;
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} catch(Exception e){
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System.out.println("Exception thrown :" + e);
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q.close();
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return false;
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}
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}
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public void top_query()
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{
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eng = new YAPEngine( );
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JavaCallback callback = new JavaCallback( "The man walked on the moon" );
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// set the Java Callback
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eng.setYAPCallback(callback);
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System.out.println("Welcome To a simple Java YAP Program");
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try {
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String string;
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Boolean rc;
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System.out.println("Query? ");
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// Get Query
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while ((string = bufRead.readLine()) == null) {
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// skip empty lines
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}
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// first solution
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rc = runQuery(string);
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// no first solution, exit loop
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if (!rc) {
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System.out.println("No Dice, but Better Luck Next Time ");
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return;
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}
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// alreadyone solution
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while (true) {
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System.out.print("More Solutions enter ';' ");
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while ((string = bufRead.readLine()) == null) {
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}
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if (string.charAt(0) != ';' )
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return;
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rc = continueQuery();
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if (!rc)
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return;
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}
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}
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catch (IOException err) {
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System.out.println("Error reading line");
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}
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}
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public static void main(String args[])
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{
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System.loadLibrary("Native");
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JavaYAP y = new JavaYAP();
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while( true ) {
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y.top_query();
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}
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// System.out.println("Thanks for trying a simple Java YAP Program");
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}
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}
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class JavaCallback extends YAPCallback
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{
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String callbacks;
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public JavaCallback( String outputText )
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{
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super();
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callbacks += outputText;
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}
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public void run(String s)
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{
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//callbacks.append(s);
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}
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private static final String TAG = "JavaCallback";
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}
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