public final BaseDescr singleRestriction()

in drools-drl/drools-drl-parser/src/main/java/org/drools/drl/parser/lang/DRL5Expressions.java [2802:2930]
109 lines of code
41 McCabe index (conditional complexity)

	public final BaseDescr singleRestriction() throws RecognitionException {
		BaseDescr result = null;


		ParserRuleReturnScope op =null;
		java.util.List<String> sa =null;
		ParserRuleReturnScope value =null;
		BaseDescr or =null;

		try {
			// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:422:3: (op= operator ( ( squareArguments shiftExpression )=>sa= squareArguments value= shiftExpression |value= shiftExpression ) | LEFT_PAREN or= orRestriction RIGHT_PAREN )
			int alt44=2;
			int LA44_0 = input.LA(1);
			if ( (LA44_0==EQUALS||(LA44_0 >= GREATER && LA44_0 <= GREATER_EQUALS)||(LA44_0 >= LESS && LA44_0 <= LESS_EQUALS)||LA44_0==NOT_EQUALS||LA44_0==TILDE) ) {
				alt44=1;
			}
			else if ( (LA44_0==ID) && ((((helper.validateIdentifierKey(DroolsSoftKeywords.NOT)))||((helper.isPluggableEvaluator(false)))))) {
				alt44=1;
			}
			else if ( (LA44_0==LEFT_PAREN) ) {
				alt44=2;
			}

			else {
				if (state.backtracking>0) {state.failed=true; return result;}
				NoViableAltException nvae =
					new NoViableAltException("", 44, 0, input);
				throw nvae;
			}

			switch (alt44) {
				case 1 :
					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:422:6: op= operator ( ( squareArguments shiftExpression )=>sa= squareArguments value= shiftExpression |value= shiftExpression )
					{
					pushFollow(FOLLOW_operator_in_singleRestriction1963);
					op=operator();
					state._fsp--;
					if (state.failed) return result;
					if ( state.backtracking==0 ) { helper.emit( Location.LOCATION_LHS_INSIDE_CONDITION_ARGUMENT ); }
					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:424:6: ( ( squareArguments shiftExpression )=>sa= squareArguments value= shiftExpression |value= shiftExpression )
					int alt43=2;
					int LA43_0 = input.LA(1);
					if ( (LA43_0==LEFT_SQUARE) ) {
						int LA43_1 = input.LA(2);
						if ( (synpred11_DRL5Expressions()) ) {
							alt43=1;
						}
						else if ( (true) ) {
							alt43=2;
						}

					}
					else if ( (LA43_0==BOOL||(LA43_0 >= DECIMAL && LA43_0 <= DECR)||LA43_0==FLOAT||LA43_0==HEX||(LA43_0 >= ID && LA43_0 <= INCR)||LA43_0==LEFT_PAREN||LA43_0==LESS||LA43_0==MINUS||LA43_0==NEGATION||LA43_0==NULL||LA43_0==PLUS||(LA43_0 >= STAR && LA43_0 <= TIME_INTERVAL)) ) {
						alt43=2;
					}

					else {
						if (state.backtracking>0) {state.failed=true; return result;}
						NoViableAltException nvae =
							new NoViableAltException("", 43, 0, input);
						throw nvae;
					}

					switch (alt43) {
						case 1 :
							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:424:8: ( squareArguments shiftExpression )=>sa= squareArguments value= shiftExpression
							{
							pushFollow(FOLLOW_squareArguments_in_singleRestriction1992);
							sa=squareArguments();
							state._fsp--;
							if (state.failed) return result;
							pushFollow(FOLLOW_shiftExpression_in_singleRestriction1996);
							value=shiftExpression();
							state._fsp--;
							if (state.failed) return result;
							}
							break;
						case 2 :
							// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:425:10: value= shiftExpression
							{
							pushFollow(FOLLOW_shiftExpression_in_singleRestriction2009);
							value=shiftExpression();
							state._fsp--;
							if (state.failed) return result;
							}
							break;

					}

					if ( state.backtracking==0 ) { if( buildDescr  ) {
					               BaseDescr descr = ( (value!=null?((DRL5Expressions.shiftExpression_return)value).result:null) != null &&
					                                 ( (!((value!=null?((DRL5Expressions.shiftExpression_return)value).result:null) instanceof AtomicExprDescr)) ||
					                                   ((value!=null?input.toString(value.start,value.stop):null).equals(((AtomicExprDescr)(value!=null?((DRL5Expressions.shiftExpression_return)value).result:null)).getExpression())) )) ?
							                    (value!=null?((DRL5Expressions.shiftExpression_return)value).result:null) :
							                    new AtomicExprDescr( (value!=null?input.toString(value.start,value.stop):null) ) ;
					               result = new RelationalExprDescr( (op!=null?((DRL5Expressions.operator_return)op).opr:null), (op!=null?((DRL5Expressions.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 );
					         }
					}
					break;
				case 2 :
					// src/main/resources/org/drools/compiler/lang/DRL5Expressions.g:440:6: LEFT_PAREN or= orRestriction RIGHT_PAREN
					{
					match(input,LEFT_PAREN,FOLLOW_LEFT_PAREN_in_singleRestriction2034); if (state.failed) return result;
					pushFollow(FOLLOW_orRestriction_in_singleRestriction2038);
					or=orRestriction();
					state._fsp--;
					if (state.failed) return result;
					match(input,RIGHT_PAREN,FOLLOW_RIGHT_PAREN_in_singleRestriction2040); if (state.failed) return result;
					if ( state.backtracking==0 ) { result = or; }
					}
					break;

			}
		}

		catch (RecognitionException re) {
		    throw re;
		}

		finally {
			// do for sure before leaving
		}
		return result;
	}