Package org.drools.lang.descr

Examples of org.drools.lang.descr.AtomicExprDescr

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                       if( buildDescr  ) {
                                     BaseDescr descr = ( (value!=null?value.result:null) != null &&
                                                       ( (!((value!=null?value.result:null) instanceof AtomicExprDescr)) ||
                                                         ((value!=null?input.toString(value.start,value.stop):null).equals(((AtomicExprDescr)(value!=null?value.result:null)).getExpression())) )) ?
                                              (value!=null?value.result:null) :
                                              new AtomicExprDescr( (value!=null?input.toString(value.start,value.stop):null) ) ;
                                     result = new RelationalExprDescr( (op!=null?op.opr:null), (op!=null?op.negated:false), (op!=null?op.params:null), ((relationalExpression_scope)relationalExpression_stack.peek()).lsd, descr );
                               if( ((relationalExpression_scope)relationalExpression_stack.peek()).lsd instanceof BindingDescr ) {
                                   ((relationalExpression_scope)relationalExpression_stack.peek()).lsd = new AtomicExprDescr( ((BindingDescr)((relationalExpression_scope)relationalExpression_stack.peek()).lsd).getExpression() );
                               }
                                 }
                                 helper.emit( Location.LOCATION_LHS_INSIDE_CONDITION_END );
                              
                    }
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                    literal11=literal();

                    state._fsp--;
                    if (state.failed) return result;
                    if ( state.backtracking==0 ) {
                       if( buildDescr  ) { result = new AtomicExprDescr( (literal11!=null?input.toString(literal11.start,literal11.stop):null), true ); } 
                    }

                    }
                    break;
                case 4 :
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                                            final Map<String, OperatorDescr> aliases ) {
        String value1;
        String value2;
        boolean usesThisRef;
        if ( relDescr.getRight() instanceof AtomicExprDescr ) {
            AtomicExprDescr rdescr = ((AtomicExprDescr) relDescr.getRight());
            value2 = rdescr.getRewrittenExpression().trim();
            usesThisRef = "this".equals( value2 ) || value2.startsWith( "this." );
        } else {
            BindingDescr rdescr = ((BindingDescr) relDescr.getRight());
            value2 = rdescr.getExpression().trim();
            usesThisRef = "this".equals( value2 ) || value2.startsWith( "this." );
        }
        if ( relDescr.getLeft() instanceof AtomicExprDescr ) {
            AtomicExprDescr ldescr = (AtomicExprDescr) relDescr.getLeft();
            value1 = ldescr.getRewrittenExpression();
            usesThisRef = usesThisRef || "this".equals( value1 ) || value1.startsWith( "this." );
        } else {
            value1 = ((BindingDescr) relDescr.getLeft()).getExpression();
            usesThisRef = usesThisRef || "this".equals( value1 ) || value1.startsWith( "this." );
        }
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    @Test
    public void testProcessInlineCast() throws Exception {
        String expr = "field1#Class.field2";
        String expectedInstanceof = "field1 instanceof Class && ";
        String expectedcasted = "((Class)field1).field2";
        AtomicExprDescr atomicExpr = new AtomicExprDescr(expr);
        String[] instanceofAndCastedExpr = dumper.processImplicitConstraints(expr, atomicExpr, null);
        assertEquals(expectedInstanceof, instanceofAndCastedExpr[0]);
        assertEquals(expectedcasted, instanceofAndCastedExpr[1]);
        assertEquals(expectedcasted, atomicExpr.getRewrittenExpression());

        expr = "field1#Class1.field2#Class2.field3";
        expectedInstanceof = "field1 instanceof Class1 && ((Class1)field1).field2 instanceof Class2 && ";
        expectedcasted = "((Class2)((Class1)field1).field2).field3";
        atomicExpr = new AtomicExprDescr(expr);
        instanceofAndCastedExpr = dumper.processImplicitConstraints(expr, atomicExpr, null);
        assertEquals(expectedInstanceof, instanceofAndCastedExpr[0]);
        assertEquals(expectedcasted, instanceofAndCastedExpr[1]);
        assertEquals(expectedcasted, atomicExpr.getRewrittenExpression());
    }
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    @Test
    public void testProcessNullSafeDereferencing() throws Exception {
        String expr = "field1!.field2";
        String expectedNullCheck = "field1 != null && ";
        String expectedExpr = "field1.field2";
        AtomicExprDescr atomicExpr = new AtomicExprDescr(expr);
        String[] nullCheckAndExpr = dumper.processImplicitConstraints( expr, atomicExpr, null );
        assertEquals(expectedNullCheck, nullCheckAndExpr[0]);
        assertEquals(expectedExpr, nullCheckAndExpr[1]);
        assertEquals(expectedExpr, atomicExpr.getRewrittenExpression());

        expr = "field1!.field2!.field3";
        expectedNullCheck = "field1 != null && field1.field2 != null && ";
        expectedExpr = "field1.field2.field3";
        atomicExpr = new AtomicExprDescr(expr);
        nullCheckAndExpr = dumper.processImplicitConstraints( expr, atomicExpr, null );
        assertEquals(expectedNullCheck, nullCheckAndExpr[0]);
        assertEquals(expectedExpr, nullCheckAndExpr[1]);
        assertEquals(expectedExpr, atomicExpr.getRewrittenExpression());
    }
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    @Test
    public void testProcessImplicitConstraints() throws Exception {
        String expr = "field1#Class!.field2";
        String expectedConstraints = "field1 instanceof Class && ";
        String expectedExpr = "((Class)field1).field2";
        AtomicExprDescr atomicExpr = new AtomicExprDescr(expr);
        String[] constraintsAndExpr = dumper.processImplicitConstraints( expr, atomicExpr, null );
        assertEquals(expectedConstraints, constraintsAndExpr[0]);
        assertEquals(expectedExpr, constraintsAndExpr[1]);
        assertEquals(expectedExpr, atomicExpr.getRewrittenExpression());

        expr = "field1!.field2#Class.field3";
        expectedConstraints = "field1 != null && field1.field2 instanceof Class && ";
        expectedExpr = "((Class)field1.field2).field3";
        atomicExpr = new AtomicExprDescr(expr);
        constraintsAndExpr = dumper.processImplicitConstraints( expr, atomicExpr, null );
        assertEquals(expectedConstraints, constraintsAndExpr[0]);
        assertEquals(expectedExpr, constraintsAndExpr[1]);
        assertEquals(expectedExpr, atomicExpr.getRewrittenExpression());

        expr = "field1#Class.field2!.field3";
        expectedConstraints = "field1 instanceof Class && ((Class)field1).field2 != null && ";
        expectedExpr = "((Class)field1).field2.field3";
        atomicExpr = new AtomicExprDescr(expr);
        constraintsAndExpr = dumper.processImplicitConstraints( expr, atomicExpr, null );
        assertEquals(expectedConstraints, constraintsAndExpr[0]);
        assertEquals(expectedExpr, constraintsAndExpr[1]);
        assertEquals(expectedExpr, atomicExpr.getRewrittenExpression());
    }
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                                            final Map<String, OperatorDescr> aliases ) {
        String value1;
        String value2;
        boolean usesThisRef;
        if ( relDescr.getRight() instanceof AtomicExprDescr ) {
            AtomicExprDescr rdescr = ((AtomicExprDescr) relDescr.getRight());
            value2 = rdescr.getRewrittenExpression().trim();
            usesThisRef = "this".equals( value2 ) || value2.startsWith( "this." );
        } else {
            BindingDescr rdescr = ((BindingDescr) relDescr.getRight());
            value2 = rdescr.getExpression().trim();
            usesThisRef = "this".equals( value2 ) || value2.startsWith( "this." );
        }
        if ( relDescr.getLeft() instanceof AtomicExprDescr ) {
            AtomicExprDescr ldescr = (AtomicExprDescr) relDescr.getLeft();
            value1 = ldescr.getRewrittenExpression();
            usesThisRef = usesThisRef || "this".equals( value1 ) || value1.startsWith( "this." );
        } else {
            value1 = ((BindingDescr) relDescr.getLeft()).getExpression();
            usesThisRef = usesThisRef || "this".equals( value1 ) || value1.startsWith( "this." );
        }
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        return constrAndExpr[0] + constrAndExpr[1];
    }

    private void processBinding(StringBuilder sbuilder, BindingDescr bind, boolean isInsideRelCons, MVELDumperContext context) {
        String expr = bind.getExpression().trim();
        AtomicExprDescr atomicExpr = new AtomicExprDescr(expr);
        String[] constrAndExpr = processImplicitConstraints(expr, atomicExpr, context);

        if ( isInsideRelCons ) {
            sbuilder.append( constrAndExpr[0] ).append( constrAndExpr[1] );
        } else if ( constrAndExpr[0].length() > 4 ) {
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            }
            if ( wrapParenthesis ) {
                sbuilder.append( " )" );
            }
        } else if ( base instanceof AtomicExprDescr ) {
            AtomicExprDescr atom = (AtomicExprDescr) base;
            String expr = atom.getExpression().trim();
            if ( expr.matches( "eval\\s*\\(.*\\)\\s*" ) ) {
                // stripping "eval" as it is no longer necessary
                expr = expr.substring( expr.indexOf( '(' ) + 1,
                                       expr.lastIndexOf( ')' ) );
            }
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                    state._fsp--;
                    if (state.failed) return result;
                    if ( state.backtracking==0 ) {
                       if( buildDescr  ) {
                                     result = new RelationalExprDescr( (op!=null?input.toString(op.start,op.stop):null), false, null, left, new AtomicExprDescr((right!=null?input.toString(right.start,right.stop):null)) );
                                 }
                              
                    }

                    }
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Related Classes of org.drools.lang.descr.AtomicExprDescr

  • org.drools.lang.DRL5Expressions
  • org.drools.lang.DRL6Expressions
  • org.drools.lang.DRLExpressions
  • org.drools.lang.DRLExprParserTest
  • org.drools.lang.DRLExprTreeTest
  • org.drools.lang.MVELDumper
  • org.drools.lang.MVELDumperTest
  • org.drools.rule.builder.PatternBuilder
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