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Re: drools error [ERR 102] Line 40:43 mismatched input '&&' expecting ')' in rule "Free Fish Food Sample"
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created by <a href="http://community.jboss.org/people/mschwery">Mike schwery</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/588797#588797">View the full discussion</a>
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<div class="jive-rendered-content"><p>full rule</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>package org.drools.examples</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>import org.drools.WorkingMemory</p><p>import org.drools.examples.PetStore.Order</p><p>import org.drools.examples.PetStore.Purchase</p><p>import org.drools.examples.PetStore.Product</p><p>import java.util.ArrayList</p><p>import javax.swing.JOptionPane; </p><p>import javax.swing.JFrame         </p><p>global JFrame frame </p><p>global javax.swing.JTextArea textArea</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>//dialect "mvel"</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>// insert each item in the shopping cart into the Working Memory </p><p>rule "Explode Cart"</p><p>    agenda-group "init"</p><p>    auto-focus true    </p><p>    salience 10</p><p>    dialect "java"</p><p>    when</p><p>        $order : Order( grossTotal == -1 )</p><p>        $item : Purchase() from $order.items</p><p>    then</p><p>        insert( $item );</p><p>        drools.getKnowledgeRuntime().getAgenda().getAgendaGroup( "show items" ).setFocus();        </p><p>        drools.getKnowledgeRuntime().getAgenda().getAgendaGroup( "evaluate" ).setFocus();        </p><p>end</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>// Free Fish Food sample when we buy a Gold Fish if we haven't already  bought </p><p>// Fish Food and dont already have a Fish Food Sample</p><p>rule "Free Fish Food Sample"</p><p>    agenda-group "evaluate"</p><p>    dialect "mvel"</p><p>    when</p><p>        $order : Order()</p><p>        not ( $p : Product( name == "Fish Food") && Purchase( product == $p )) </p><p>        not ( $p : Product( name == "Fish Food Sample") && Purchase( product == $p ) )        </p><p>        exists ( $p : Product( name == "Gold Fish") && Purchase( product == $p ) )    </p><p>        $fishFoodSample : Product( name == "Fish Food Sample" );</p><p>    then</p><p>        System.out.println( "Adding free Fish Food Sample to cart" );</p><p>        purchase = new Purchase($order, $fishFoodSample);</p><p>        insert( purchase );</p><p>        $order.addItem( purchase );    </p><p>end</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>// Suggest a tank if we have bought more than 5 gold fish and dont already have one</p><p>rule "Suggest Tank"</p><p>       agenda-group "evaluate"</p><p>       dialect "java"</p><p>    when</p><p>        $order : Order()</p><p>        not ( $p : Product( name == "Fish Tank") && Purchase( product == $p ) )    </p><p>        ArrayList( $total : size > 5 ) from collect( Purchase( product.name == "Gold Fish" ) )</p><p>        $fishTank : Product( name == "Fish Tank" )        </p><p>    then</p><p>        requireTank(frame, drools.getWorkingMemory(), $order, $fishTank, $total);     </p><p>end    </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>rule "Show Items"</p><p>    agenda-group "show items"</p><p>    dialect "java"</p><p>    when</p><p>        $order : Order( )</p><p>        $p : Purchase( order == $order )</p><p>    then    </p><p>        textArea.append( $p.getProduct() + "\n");</p><p>end</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>rule "do checkout"</p><p>        dialect "java"</p><p>    when</p><p>    then</p><p>        doCheckout(frame, drools.getWorkingMemory());</p><p>end    </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>rule "Gross Total"</p><p>    agenda-group "checkout"</p><p>    dialect "mvel"</p><p>    when</p><p>        $order : Order( grossTotal == -1)</p><p>        Number( total : doubleValue ) from accumulate( Purchase( $price : product.price ),</p><p>                                                              sum( $price ) )</p><p>    then    </p><p>        modify( $order ) { grossTotal = total }</p><p>        textArea.append( "\ngross total=" + total + "\n" );</p><p>end</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>rule "Apply 5% Discount"</p><p>    agenda-group "checkout"</p><p>    dialect "mvel"</p><p>    when</p><p>        $order : Order( grossTotal >= 10 && < 20 )</p><p>    then</p><p>        $order.discountedTotal = $order.grossTotal * 0.95;</p><p>        textArea.append( "discountedTotal total=" + $order.discountedTotal + "\n" );        </p><p>end</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>rule "Apply 10% Discount"</p><p>    agenda-group "checkout"</p><p>    dialect "mvel"</p><p>    when</p><p>        $order : Order( grossTotal >= 20 )</p><p>    then</p><p>        $order.discountedTotal = $order.grossTotal * 0.90;</p><p>        textArea.append( "discountedTotal total=" + $order.discountedTotal + "\n" );    </p><p>end</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>function void doCheckout(JFrame frame, WorkingMemory workingMemory) {</p><p>        Object[] options = {"Yes",</p><p>                            "No"};</p><p>                            </p><p>        int n = JOptionPane.showOptionDialog(frame,</p><p>                                             "Would you like to checkout?",</p><p>                                             "",</p><p>                                             JOptionPane.YES_NO_OPTION,</p><p>                                             JOptionPane.QUESTION_MESSAGE,</p><p>                                             null,</p><p>                                             options,</p><p>                                             options[0]);</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>       if (n == 0) {</p><p>            workingMemory.setFocus( "checkout" );</p><p>       }   </p><p>}</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>function boolean requireTank(JFrame frame, WorkingMemory workingMemory, Order order, Product fishTank, int total) {</p><p>        Object[] options = {"Yes",</p><p>                            "No"};</p><p>                            </p><p>        int n = JOptionPane.showOptionDialog(frame,</p><p>                                             "Would you like to buy a tank for your " + total + " fish?",</p><p>                                             "Purchase Suggestion",</p><p>                                             JOptionPane.YES_NO_OPTION,</p><p>                                             JOptionPane.QUESTION_MESSAGE,</p><p>                                             null,</p><p>                                             options,</p><p>                                             options[0]);</p><p>                                             </p><p>       System.out.print( "SUGGESTION: Would you like to buy a tank for your "</p><p>                           + total + " fish? - " );</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>       if (n == 0) {</p><p>             Purchase purchase = new Purchase( order, fishTank );</p><p>             workingMemory.insert( purchase );</p><p>             order.addItem( purchase );</p><p>             System.out.println( "Yes" );</p><p>       } else {</p><p>            System.out.println( "No" );</p><p>       }      </p><p>       return true;</p><p>}</p></div>
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