字段約束連接

• 用于字段約束
• 對象內部多個約束連接，采用“&&”（and）、“||”(or)和“,”(and)
• 執行順序：“&&”（and）、“||”(or)和“,”

字段約束操作符

• >、>=、<、<=、= =、!=
• contains：包含 A contains B, A中包含B
• not contains：與contains相反
• memberOf：單個對象屬于某個集合，this表示當前對象
• not memberOf：與memberof相反
• matches：正則表達式，匹配
• not matches:正則表達式，不匹配

contains 、 not contains

package com.sampleimport com.bean.Customer; import com.bean.Account;rule "contains"when$account : Account();$customer : Customer(name=="七夜雪" && accounts contains $account);thenSystem.out.println( "contains test success" ); endrule "not contains"when$account : Account();$customer : Customer(name=="七夜雪" && accounts not contains $account);thenSystem.out.println( "not contains test success" ); end /*** 字段約束符，contains* @throws Exception*/@Testpublic void testContainsRule() throws Exception {KnowledgeBase kbase = readKnowledgeBase("Contains.drl");StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger(ksession, "test");Customer customer = new Customer();customer.setName("七夜雪");Account account1 = new Account();account1.setNum(100);Account account2 = new Account();account2.setNum(100);customer.getAccounts().add(account1); //not contains//customer.getAccounts().add(account2); // contains ksession.insert(customer);ksession.insert(account2);ksession.fireAllRules();logger.close();}

?

memberOf 、not?memberOf?

package com.sampleimport com.bean.Customer; import com.bean.Account;rule "Memberof"when$customer : Customer();//當前的account是$customer.getAccounts()的一個成員$account : Account(this memberOf $customer.getAccounts()); thenSystem.out.println( "memberOf test success and account is " + $account.getName() ); endrule "not Memberof"when$customer : Customer();//當前的account不是$customer.getAccounts()的一個成員$account : Account(this not memberOf $customer.getAccounts()); thenSystem.out.println( "not memberOf test success and account is " + $account.getName() ); end /*** 字段約束符，memberOf* @throws Exception*/@Testpublic void testMemberOfRule() throws Exception {KnowledgeBase kbase = readKnowledgeBase("Members.drl");StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger(ksession, "test");Customer customer = new Customer();Account account1 = new Account();account1.setName("碧落");Account account2 = new Account();account2.setName("黃泉");customer.getAccounts().add(account1); ksession.insert(customer);ksession.insert(account1);ksession.insert(account2);ksession.fireAllRules();logger.close();}

matches 、 not?matches

package com.sampleimport com.bean.Customer; import com.bean.Account;rule "Matchs"when$customer : Customer(name matches "qiye*");thenSystem.out.println( "Matchs test success and customer is " + $customer.getName() ); endrule "not Matchs"when$customer : Customer(name not matches "qiye*");thenSystem.out.println( "not Matchs test success and customer is " + $customer.getName() ); end /*** 字段約束符，memberOf* @throws Exception*/@Testpublic void testMatcherRule() throws Exception {KnowledgeBase kbase = readKnowledgeBase("Matchs.drl");StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();Customer customer = new Customer();customer.setName("qiyexue");Customer customer1 = new Customer();customer1.setName("biluo");ksession.insert(customer);ksession.insert(customer1);ksession.fireAllRules();}

?

fact對象代碼：http://www.cnblogs.com/qiyexue/p/7822670.html

?

轉載于:https://www.cnblogs.com/qiyexue/p/7822850.html

總結

以上是生活随笔為你收集整理的Drools学习笔记3—Conditions / LHS—字段约束连接字段约束操作符的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。