Package org.drools.compiler.lang.descr

Examples of org.drools.compiler.lang.descr.AtomicExprDescr

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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);
        ConstraintConnectiveDescr ccd = new ConstraintConnectiveDescr( );
        ccd.addDescr( atomicExpr );
        String[] instanceofAndCastedExpr = dumper.processImplicitConstraints(expr, atomicExpr, ccd, ccd.getDescrs().indexOf( atomicExpr ), null);
        assertEquals( 2, ccd.getDescrs().size() );
        assertEquals( expectedInstanceof, ccd.getDescrs().get( 0 ).toString() );
        assertEquals(expectedcasted, atomicExpr.getRewrittenExpression());

        expr = "field1#Class1.field2#Class2.field3";
        String expectedInstanceof1 = "field1 instanceof Class1";
        String expectedInstanceof2 = "((Class1)field1).field2 instanceof Class2";
        expectedcasted = "((Class2)((Class1)field1).field2).field3";
        atomicExpr = new AtomicExprDescr(expr);
        ccd = new ConstraintConnectiveDescr( );
        instanceofAndCastedExpr = dumper.processImplicitConstraints(expr, atomicExpr, ccd, ccd.getDescrs().indexOf( atomicExpr ), null);
        assertEquals( expectedInstanceof1, ccd.getDescrs().get( 0 ).toString() );
        assertEquals( expectedInstanceof2, ccd.getDescrs().get( 1 ).toString() );
        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);
        ConstraintConnectiveDescr ccd = new ConstraintConnectiveDescr( );
        String[] nullCheckAndExpr = dumper.processImplicitConstraints( expr, atomicExpr, ccd, ccd.getDescrs().indexOf( atomicExpr ), null );
        assertEquals( expectedNullCheck, ccd.getDescrs().get( 0 ).toString() );
        assertEquals(expectedExpr, nullCheckAndExpr[1]);
        assertEquals(expectedExpr, atomicExpr.getRewrittenExpression());

        expr = "field1!.field2!.field3";
        String expectedNullCheck1 = "field1 != null";
        String expectedNullCheck2 = "field1.field2 != null";
        expectedExpr = "field1.field2.field3";
        atomicExpr = new AtomicExprDescr(expr);
        ccd = new ConstraintConnectiveDescr( );
        nullCheckAndExpr = dumper.processImplicitConstraints( expr, atomicExpr, ccd, ccd.getDescrs().indexOf( atomicExpr ), null );
        assertEquals( expectedNullCheck1, ccd.getDescrs().get( 0 ).toString() );
        assertEquals( expectedNullCheck2, ccd.getDescrs().get( 1 ).toString() );
        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);
        ConstraintConnectiveDescr ccd = new ConstraintConnectiveDescr( );
        String[] constraintsAndExpr = dumper.processImplicitConstraints( expr, atomicExpr, ccd, ccd.getDescrs().indexOf( atomicExpr ), null );
        assertEquals( expectedConstraints, ccd.getDescrs().get( 0 ).toString() );
        assertEquals(expectedExpr, constraintsAndExpr[1]);
        assertEquals(expectedExpr, atomicExpr.getRewrittenExpression());

        expr = "field1!.field2#Class.field3";
        String expectedConstraints1 = "field1 != null";
        String expectedConstraints2 = "field1.field2 instanceof Class";
        expectedExpr = "((Class)field1.field2).field3";
        atomicExpr = new AtomicExprDescr(expr);
        ccd = new ConstraintConnectiveDescr( );
        constraintsAndExpr = dumper.processImplicitConstraints( expr, atomicExpr, ccd, ccd.getDescrs().indexOf( atomicExpr ), null );
        assertEquals( expectedConstraints1, ccd.getDescrs().get( 0 ).toString() );
        assertEquals( expectedConstraints2, ccd.getDescrs().get( 1 ).toString() );
        assertEquals(expectedExpr, constraintsAndExpr[1]);
        assertEquals(expectedExpr, atomicExpr.getRewrittenExpression());

        expr = "field1#Class.field2!.field3";
        expectedConstraints1 = "field1 instanceof Class";
        expectedConstraints2 = "((Class)field1).field2 != null";
        expectedExpr = "((Class)field1).field2.field3";
        atomicExpr = new AtomicExprDescr(expr);
        ccd = new ConstraintConnectiveDescr( );
        constraintsAndExpr = dumper.processImplicitConstraints( expr, atomicExpr, ccd, ccd.getDescrs().indexOf( atomicExpr ), null );
        assertEquals( expectedConstraints1, ccd.getDescrs().get( 0 ).toString() );
        assertEquals( expectedConstraints2, ccd.getDescrs().get( 1 ).toString() );
        assertEquals(expectedExpr, constraintsAndExpr[1]);
        assertEquals(expectedExpr, atomicExpr.getRewrittenExpression());
    }
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          pushFollow(FOLLOW_type_in_instanceOfExpression1488);
          right=type();
          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)) );
                     }
                   }
          }
          break;
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      state._fsp--;
      if (state.failed) return result;
      if ( state.backtracking==0 ) { if( buildDescr  ) { result = left; }
            if( left instanceof BindingDescr ) {
                binding = (BindingDescr)left;
                leftDescr = new AtomicExprDescr( binding.getExpression() );
            } else {
                leftDescr = left;
            }
          }
      // src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:323:5: ( ( not_key in_key )=> not_key in= in_key LEFT_PAREN e1= expression ( COMMA e2= expression )* RIGHT_PAREN |in= in_key LEFT_PAREN e1= expression ( COMMA e2= expression )* RIGHT_PAREN )?
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      left=shiftExpression();
      state._fsp--;
      if (state.failed) return result;
      if ( state.backtracking==0 ) { if( buildDescr  ) {
                if ( (left!=null?((DRL6Expressions.shiftExpression_return)left).result:null) == null ) {
                  result = new AtomicExprDescr( (left!=null?input.toString(left.start,left.stop):null) );
                } else if ( (left!=null?((DRL6Expressions.shiftExpression_return)left).result:null) instanceof AtomicExprDescr ) {
                  if ( (left!=null?input.toString(left.start,left.stop):null).equals(((AtomicExprDescr)(left!=null?((DRL6Expressions.shiftExpression_return)left).result:null)).getExpression()) ) {
                    result = (left!=null?((DRL6Expressions.shiftExpression_return)left).result:null);
                  } else {
                    result = new AtomicExprDescr( (left!=null?input.toString(left.start,left.stop):null) ) ;
                  }
                } else if ( (left!=null?((DRL6Expressions.shiftExpression_return)left).result:null) instanceof BindingDescr ) {
                    if ( (left!=null?input.toString(left.start,left.stop):null).equals(((BindingDescr)(left!=null?((DRL6Expressions.shiftExpression_return)left).result:null)).getExpression()) ) {
                      result = (left!=null?((DRL6Expressions.shiftExpression_return)left).result:null);
                    } else {
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          if ( state.backtracking==0 ) { if( buildDescr  ) {
                         BaseDescr descr = ( (value!=null?((DRL6Expressions.shiftExpression_return)value).result:null) != null &&
                                           ( (!((value!=null?((DRL6Expressions.shiftExpression_return)value).result:null) instanceof AtomicExprDescr)) ||
                                             ((value!=null?input.toString(value.start,value.stop):null).equals(((AtomicExprDescr)(value!=null?((DRL6Expressions.shiftExpression_return)value).result:null)).getExpression())) )) ?
                                  (value!=null?((DRL6Expressions.shiftExpression_return)value).result:null) :
                                  new AtomicExprDescr( (value!=null?input.toString(value.start,value.stop):null) ) ;
                         result = new RelationalExprDescr( (op!=null?((DRL6Expressions.operator_return)op).opr:null), (op!=null?((DRL6Expressions.operator_return)op).negated:false), sa, relationalExpression_stack.peek().lsd, descr );
                   if( relationalExpression_stack.peek().lsd instanceof BindingDescr ) {
                       relationalExpression_stack.peek().lsd = new AtomicExprDescr( ((BindingDescr)relationalExpression_stack.peek().lsd).getExpression() );
                   }
                     }
                     helper.emit( Location.LOCATION_LHS_INSIDE_CONDITION_END );
                   }
          }
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          {
          pushFollow(FOLLOW_literal_in_primary2769);
          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 :
          // src/main/resources/org/drools/compiler/lang/DRL6Expressions.g:541:9: ( super_key )=> super_key superSuffix
          {
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    }

    private boolean findExpressionValues(RelationalExprDescr relDescr, String[] values) {
        boolean usesThisRef;
        if ( relDescr.getRight() instanceof AtomicExprDescr ) {
            AtomicExprDescr rdescr = ((AtomicExprDescr) relDescr.getRight());
            values[1] = rdescr.getRewrittenExpression().trim();
            usesThisRef = "this".equals( values[1] ) || values[1].startsWith("this.");
        } else {
            BindingDescr rdescr = ((BindingDescr) relDescr.getRight());
            values[1] = rdescr.getExpression().trim();
            usesThisRef = "this".equals( values[1] ) || values[1].startsWith("this.");
        }
        if ( relDescr.getLeft() instanceof AtomicExprDescr ) {
            AtomicExprDescr ldescr = (AtomicExprDescr) relDescr.getLeft();
            values[0] = ldescr.getRewrittenExpression();
            usesThisRef = usesThisRef || "this".equals( values[0] ) || values[0].startsWith("this.");
        } else {
            values[0] = ((BindingDescr) relDescr.getLeft()).getExpression();
            usesThisRef = usesThisRef || "this".equals( values[0] ) || values[0].startsWith("this.");
        }
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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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Related Classes of org.drools.compiler.lang.descr.AtomicExprDescr

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