{"id":3884,"date":"2018-04-25T21:15:07","date_gmt":"2018-04-25T13:15:07","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=3884"},"modified":"2018-04-25T21:15:07","modified_gmt":"2018-04-25T13:15:07","slug":"%e5%a6%82%e4%bd%95%e7%bc%96%e5%86%99aviator%e8%87%aa%e5%ae%9a%e4%b9%89%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/3884.html","title":{"rendered":"\u5982\u4f55\u7f16\u5199Aviator\u81ea\u5b9a\u4e49\u51fd\u6570"},"content":{"rendered":"

=Start=<\/p>\n

\u7f18\u7531\uff1a<\/h4>\n

\u6574\u7406\u3001\u603b\u7ed3\u4e00\u4e0b\u7f16\u5199Aviator\u81ea\u5b9a\u4e49\u51fd\u6570\u7684\u65b9\u6cd5\u548c\u8fc7\u7a0b\uff0c\u65b9\u4fbf\u4ee5\u540e\u53c2\u8003\u3002<\/p>\n

\u6b63\u6587\uff1a<\/h4>\n

\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n

Aviator \u9664\u4e86\u5185\u7f6e\u7684\u51fd\u6570\u4e4b\u5916\uff0c\u8fd8\u5141\u8bb8\u7528\u6237\u81ea\u5b9a\u4e49\u51fd\u6570\uff0c\u53ea\u8981\u5b9e\u73b0 com.googlecode.aviator.runtime.type.AviatorFunction \u63a5\u53e3\uff0c\u5e76\u6ce8\u518c\u5230 AviatorEvaluator \u5373\u53ef\u4f7f\u7528\u3002<\/span><\/strong>AviatorFunction \u63a5\u53e3\u5341\u5206\u5e9e\u5927\uff0c\u901a\u5e38\u6765\u8bf4\u4f60\u5e76\u4e0d\u9700\u8981\u5b9e\u73b0\u6240\u6709\u7684\u65b9\u6cd5\uff0c\u53ea\u8981\u6839\u636e\u4f60\u7684\u65b9\u6cd5\u7684\u53c2 \u6570\u4e2a\u6570\uff0c\u7ee7\u627f AbstractFunction \u7c7b\u5e76 override \u76f8\u5e94\u65b9\u6cd5\u5373\u53ef\u3002<\/p>\n

public class TestAviator {\r\n    public static void main(String[] args) {\r\n        \/\/\u6ce8\u518c\u51fd\u6570\r\n        AviatorEvaluator.addFunction(new AddFunction());\r\n        System.out.println(AviatorEvaluator.execute(\"add(1, 2)\"));           \/\/ 3.0\r\n        System.out.println(AviatorEvaluator.execute(\"add(add(1, 2), 100)\")); \/\/ 103.0\r\n    }\r\n}\r\n\r\nclass AddFunction extends AbstractFunction {\r\n    @Override\r\n    public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2) {\r\n        Number left = FunctionUtils.getNumberValue(arg1, env);\r\n        Number right = FunctionUtils.getNumberValue(arg2, env);\r\n        return new AviatorDouble(left.doubleValue() + right.doubleValue());\r\n    }\r\n    public String getName() {\r\n        return \"add\";\r\n    }\r\n}<\/pre>\n
\u6ce8\u518c\u51fd\u6570\u901a\u8fc7 AviatorEvaluator.addFunction \u65b9\u6cd5\uff0c\u79fb\u9664\u53ef\u4ee5\u901a\u8fc7 removeFunction\u3002<\/span>\u53e6\u5916\uff0c FunctionUtils \u63d0\u4f9b\u4e86\u4e00\u4e9b\u65b9\u4fbf\u53c2\u6570\u7c7b\u578b\u8f6c\u6362\u7684\u65b9\u6cd5\u3002<\/p>\n
\u5982\u679c\u4f60\u7684\u53c2\u6570\u4e2a\u6570\u4e0d\u786e\u5b9a\uff0c\u53ef\u4ee5\u7ee7\u627f AbstractVariadicFunction \u7c7b\uff0c\u53ea\u8981\u5b9e\u73b0\u5176\u4e2d\u7684 variadicCall \u65b9\u6cd5\u5373\u53ef\u3002<\/span><\/strong>\u6bd4\u5982\u6211\u4eec\u5b9e\u73b0\u4e00\u4e2a\u627e\u5230\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e0d\u4e3a null \u7684\u51fd\u6570\uff1a<\/p>\n
public class GetFirstNonNullFunction extends AbstractVariadicFunction {\r\n    public AviatorObject variadicCall(Map<String, Object> env, AviatorObject... args) {\r\n        if (args != null) {\r\n            for (AviatorObject arg : args) {\r\n                if (arg.getValue(env) != null) {\r\n                    return arg;\r\n                }\r\n            }\r\n        }\r\n        return new AviatorString(null);\r\n    }\r\n\r\n    @Override\r\n    public String getName() {\r\n        return \"getFirstNonNull\";\r\n    }\r\n}<\/pre>\n
\u6ce8\u518c\u540e\u4f7f\u7528\u5c31\u53ef\u4ee5\u4f20\u5165\u4e0d\u5b9a\u53c2\u6570\u4e86\uff1a<\/p>\n
getFirstNonNull(1);\r\ngetFirstNonNull(1,2,3,4,null,5);\r\ngetFirstNonNull(a,b,c,d);<\/pre>\n
\u5f53\u7136\uff0c\u540c\u65f6\u4f60\u4ecd\u7136\u8986\u5199\u7279\u5b9a\u7684 call \u65b9\u6cd5\u6765\u81ea\u5b9a\u4e49\u5b9e\u73b0\u3002<\/p>\n
\n
\u4e00\u4e2a\u6837\u4f8b\uff1a<\/p>\n
public class IpContainsFunction {\r\n    public static void main(String[] args) {\r\n        String ipBlack = \"139.119.23.*,10.119.23.2\/31\";\r\n        String ipStr = \"10.119.23.12\";\r\n        Map<String, Object> env = new HashMap<>();\r\n        env.put(\"ipBlack\", ipBlack);\r\n        env.put(\"ipStr\", ipStr);\r\n\r\n        AviatorEvaluator.addFunction(new IpContains());\r\n\r\n        System.out.println(AviatorEvaluator.execute(\"ipContains(ipBlack, ipStr)\", env));\r\n        env.put(\"ipStr\", \"10.119.23.2\");\r\n        System.out.println(AviatorEvaluator.execute(\"ipContains(ipBlack, ipStr)\", env));\r\n    }\r\n}\r\n\r\n\r\nclass IpContains extends AbstractFunction {\r\n    private boolean matches(String ip, String subnet) {\r\n        IpAddressMatcher ipAddressMatcher = new IpAddressMatcher(subnet);\r\n        return ipAddressMatcher.matches(ip);\r\n    }\r\n\r\n    @Override\r\n    public AviatorObject call(Map<String, Object> env, AviatorObject arg1, AviatorObject arg2) {\r\n        String ipBlack = FunctionUtils.getStringValue(arg1, env);\r\n        String ipStr = FunctionUtils.getStringValue(arg2, env);\r\n        Boolean result = null;\r\n        for (String ipList: ipBlack.split(\",\")) {\r\n            if (ipList.contains(\"*\")) {\r\n                ipList = ipList.substring(0, ipList.lastIndexOf(\".\")) + \".0\/24\";\r\n            }\r\n            result = matches(ipStr, ipList);\r\n            if (result) {\r\n                break;\r\n            }\r\n        }\r\n        if (result) {\r\n            return AviatorBoolean.TRUE;\r\n        } else {\r\n            return AviatorBoolean.FALSE;\r\n        }\r\n    }\r\n\r\n    public String getName() {\r\n        return \"ipContains\";\r\n    }\r\n}<\/pre>\n
 <\/p>\n
\u53c2\u8003\u94fe\u63a5\uff1a<\/h5>\n