Mike schwery [http://community.jboss.org/people/mschwery] created the discussion
"Re: drools error [ERR 102] Line 40:43 mismatched input '&&' expecting ')' in rule "Free Fish Food Sample"" To view the discussion, visit: http://community.jboss.org/message/588797#588797 -------------------------------------------------------------- full rule package org.drools.examples import org.drools.WorkingMemory import org.drools.examples.PetStore.Order import org.drools.examples.PetStore.Purchase import org.drools.examples.PetStore.Product import java.util.ArrayList import javax.swing.JOptionPane; import javax.swing.JFrame global JFrame frame global javax.swing.JTextArea textArea //dialect "mvel" // insert each item in the shopping cart into the Working Memory rule "Explode Cart" agenda-group "init" auto-focus true salience 10 dialect "java" when $order : Order( grossTotal == -1 ) $item : Purchase() from $order.items then insert( $item ); drools.getKnowledgeRuntime().getAgenda().getAgendaGroup( "show items" ).setFocus(); drools.getKnowledgeRuntime().getAgenda().getAgendaGroup( "evaluate" ).setFocus(); end // Free Fish Food sample when we buy a Gold Fish if we haven't already bought // Fish Food and dont already have a Fish Food Sample rule "Free Fish Food Sample" agenda-group "evaluate" dialect "mvel" when $order : Order() not ( $p : Product( name == "Fish Food") && Purchase( product == $p )) not ( $p : Product( name == "Fish Food Sample") && Purchase( product == $p ) ) exists ( $p : Product( name == "Gold Fish") && Purchase( product == $p ) ) $fishFoodSample : Product( name == "Fish Food Sample" ); then System.out.println( "Adding free Fish Food Sample to cart" ); purchase = new Purchase($order, $fishFoodSample); insert( purchase ); $order.addItem( purchase ); end // Suggest a tank if we have bought more than 5 gold fish and dont already have one rule "Suggest Tank" agenda-group "evaluate" dialect "java" when $order : Order() not ( $p : Product( name == "Fish Tank") && Purchase( product == $p ) ) ArrayList( $total : size > 5 ) from collect( Purchase( product.name == "Gold Fish" ) ) $fishTank : Product( name == "Fish Tank" ) then requireTank(frame, drools.getWorkingMemory(), $order, $fishTank, $total); end rule "Show Items" agenda-group "show items" dialect "java" when $order : Order( ) $p : Purchase( order == $order ) then textArea.append( $p.getProduct() + "\n"); end rule "do checkout" dialect "java" when then doCheckout(frame, drools.getWorkingMemory()); end rule "Gross Total" agenda-group "checkout" dialect "mvel" when $order : Order( grossTotal == -1) Number( total : doubleValue ) from accumulate( Purchase( $price : product.price ), sum( $price ) ) then modify( $order ) { grossTotal = total } textArea.append( "\ngross total=" + total + "\n" ); end rule "Apply 5% Discount" agenda-group "checkout" dialect "mvel" when $order : Order( grossTotal >= 10 && < 20 ) then $order.discountedTotal = $order.grossTotal * 0.95; textArea.append( "discountedTotal total=" + $order.discountedTotal + "\n" ); end rule "Apply 10% Discount" agenda-group "checkout" dialect "mvel" when $order : Order( grossTotal >= 20 ) then $order.discountedTotal = $order.grossTotal * 0.90; textArea.append( "discountedTotal total=" + $order.discountedTotal + "\n" ); end function void doCheckout(JFrame frame, WorkingMemory workingMemory) { Object[] options = {"Yes", "No"}; int n = JOptionPane.showOptionDialog(frame, "Would you like to checkout?", "", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE, null, options, options[0]); if (n == 0) { workingMemory.setFocus( "checkout" ); } } function boolean requireTank(JFrame frame, WorkingMemory workingMemory, Order order, Product fishTank, int total) { Object[] options = {"Yes", "No"}; int n = JOptionPane.showOptionDialog(frame, "Would you like to buy a tank for your " + total + " fish?", "Purchase Suggestion", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE, null, options, options[0]); System.out.print( "SUGGESTION: Would you like to buy a tank for your " + total + " fish? - " ); if (n == 0) { Purchase purchase = new Purchase( order, fishTank ); workingMemory.insert( purchase ); order.addItem( purchase ); System.out.println( "Yes" ); } else { System.out.println( "No" ); } return true; } -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/588797#588797] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2034]
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