bartgora / rpnlibrary Goto Github PK

Create power function strategy

Remove the Non-function RPN part, and do the refactor.

DefaultCalcultaor is not used, so we can remove it totally.
Focus on refactor, and tests.

All function uses HALF_EVEN, Divide HALF_UP
Change to HALF_EVEN!!!

Remove Old Calculatro and replace with new one

Enable AssertJ and prepare new package for v4

1. Pass SCALE constant to all operators, and function strategies
2. Create component class for MathContext and Scale, and use that to propagate both.

Think about refoctor of DefaultCalculator and FunctionCalculator

Create new tests set for BigDecimal

Create branch for the advanced calculator.
Advanced Calculator is implementation that will give possibility to add your own functions to the rpn calculation.

Change MiltiplyOperatorStrategy to use BigMath library to multiply

Create more unit test!

Add Maven badge

Input: "1+2 + sin(1)"
Stack trace:

2016-04-02T22:32:00.628375+00:00 app[web.1]: 2016-04-02 22:32:00.627 ERROR 3 --- [nio-4998-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.StringIndexOutOfBoundsException: String index out of range: 0] with root cause
2016-04-02T22:32:00.628426+00:00 app[web.1]:
2016-04-02T22:32:00.628428+00:00 app[web.1]: java.lang.StringIndexOutOfBoundsException: String index out of range: 0
2016-04-02T22:32:00.628429+00:00 app[web.1]: at java.lang.String.charAt(String.java:658) ~[na:1.8.0_74-cedar14]
2016-04-02T22:32:00.628430+00:00 app[web.1]: at pl.bgora.rpn.FunctionsDefaultChecker.isDigit(FunctionsDefaultChecker.java:40) ~[RPNLibrary-2.0.jar!/:na]
2016-04-02T22:32:00.628447+00:00 app[web.1]: at pl.bgora.rpn.FunctionsCalculator.createRPN(FunctionsCalculator.java:146) ~[RPNLibrary-2.0.jar!/:na]
2016-04-02T22:32:00.628448+00:00 app[web.1]: at pl.bgora.rpn.FunctionsCalculator.calculate(FunctionsCalculator.java:44) ~[RPNLibrary-2.0.jar!/:na]
2016-04-02T22:32:00.628449+00:00 app[web.1]: at pl.bgora.calculator.web.rest.RestCalculatorController.calculate(RestCalculatorController.java:20) ~[classes!/:na]
2016-04-02T22:32:00.628449+00:00 app[web.1]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_74-cedar14]
2016-04-02T22:32:00.628450+00:00 app[web.1]: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_74-cedar14]
2016-04-02T22:32:00.628451+00:00 app[web.1]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_74-cedar14]
2016-04-02T22:32:00.628451+00:00 app[web.1]: at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_74-cedar14]
2016-04-02T22:32:00.628452+00:00 app[web.1]: at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) ~[spring-web-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628453+00:00 app[web.1]: at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) ~[spring-web-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628454+00:00 app[web.1]: at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) ~[spring-webmvc-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628455+00:00 app[web.1]: at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:817) ~[spring-webmvc-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628461+00:00 app[web.1]: at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:731) ~[spring-webmvc-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628462+00:00 app[web.1]: at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628463+00:00 app[web.1]: at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959) ~[spring-webmvc-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628464+00:00 app[web.1]: at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) ~[spring-webmvc-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628465+00:00 app[web.1]: at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:968) ~[spring-webmvc-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628466+00:00 app[web.1]: at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:859) ~[spring-webmvc-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628466+00:00 app[web.1]: at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628467+00:00 app[web.1]: at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:844) ~[spring-webmvc-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628468+00:00 app[web.1]: at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628468+00:00 app[web.1]: at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628469+00:00 app[web.1]: at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628469+00:00 app[web.1]: at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628470+00:00 app[web.1]: at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628471+00:00 app[web.1]: at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628476+00:00 app[web.1]: at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628477+00:00 app[web.1]: at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628477+00:00 app[web.1]: at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628478+00:00 app[web.1]: at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628479+00:00 app[web.1]: at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:87) ~[spring-web-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628479+00:00 app[web.1]: at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628480+00:00 app[web.1]: at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628481+00:00 app[web.1]: at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628481+00:00 app[web.1]: at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) ~[spring-web-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628482+00:00 app[web.1]: at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628483+00:00 app[web.1]: at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628483+00:00 app[web.1]: at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628484+00:00 app[web.1]: at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121) ~[spring-web-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628485+00:00 app[web.1]: at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.5.RELEASE.jar!/:4.2.5.RELEASE]
2016-04-02T22:32:00.628485+00:00 app[web.1]: at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628486+00:00 app[web.1]: at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628486+00:00 app[web.1]: at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) ~[tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628489+00:00 app[web.1]: at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628487+00:00 app[web.1]: at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628489+00:00 app[web.1]: at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628488+00:00 app[web.1]: at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:676) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628490+00:00 app[web.1]: at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628487+00:00 app[web.1]: at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628491+00:00 app[web.1]: at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628491+00:00 app[web.1]: at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628492+00:00 app[web.1]: at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628492+00:00 app[web.1]: at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628493+00:00 app[web.1]: at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628494+00:00 app[web.1]: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_74-cedar14]
2016-04-02T22:32:00.628494+00:00 app[web.1]: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_74-cedar14]
2016-04-02T22:32:00.628497+00:00 app[web.1]: at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
2016-04-02T22:32:00.628498+00:00 app[web.1]: at java.lang.Thread.run(Thread.java:745) [na:1.8.0_74-cedar14]
2016-04-02T22:32:00.628498+00:00 app[web.1]:
2016-04-02T22:32:27.061404+00:00 heroku[router]: at=info method=GET path="/calculate/1+2+sin(1)" host=calculatorweb.herokuapp.com request_id=1a498263-6b4e-47a1-aeaa-89beb483a117 fwd="87.101.22.98" dyno=web.1 connect=1ms service=20ms status=200 bytes=239

Cannot run functions with more than one parameter!
Because I have used "," and "." the same way.

Tested on calculator view.
12+sin(-1)*80 returned server 500.
cause: NPE,
#stack:

java.util.NoSuchElementException: null
    at java.util.LinkedList.removeFirst(LinkedList.java:270) ~[na:1.8.0_65]
    at java.util.LinkedList.pop(LinkedList.java:801) ~[na:1.8.0_65]
    at pl.bgora.rpn.FunctionsCalculator.getResult(FunctionsCalculator.java:235) ~[RPNLibrary-2.0.jar:na]
    at pl.bgora.rpn.FunctionsCalculator.calculate(FunctionsCalculator.java:46) ~[RPNLibrary-2.0.jar:na]
    at pl.bgora.calculator.web.rest.RestCalculatorController.calculate(RestCalculatorController.java:20) ~[classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_65]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_65]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_65]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_65]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:817) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:731) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:968) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:859) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:844) ~[spring-webmvc-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.0.32.jar:8.0.32]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:87) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) ~[tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) [tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) [tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) [tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) [tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522) [tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095) [tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672) [tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) [tomcat-embed-core-8.0.32.jar:8.0.32]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) [tomcat-embed-core-8.0.32.jar:8.0.32]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_65]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_65]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.0.32.jar:8.0.32]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_65]

Change package name - Major change, for public API, needs new Major version number

Add Fibonacci strategy.

Chanmge RPN calculator to
RPNLibrary in java licence files

Create Min function that returns less value

According to versioning documentation the version should be 3.0 as it is not back compatibile with the version from sourceforge.net (changed package names)

Change operation from Double to BigDecimal using bigmath library

Change the operation from Double to BigDecimal

As complexity of the calculator grows, introduce a simpler way to customize it for external users.
Builder, or factory should allow library users to modify some, choose by them, properties, and behaviors, and leave other as default.
Think about remodel of the EngineModel maybe.

Modify readme.md for new version.

Create a refactor for the new version.
Use good practices and Joshua Bloch's effective java 3rd

Add Coverage badge

5/2 = 5 - (cause it uses ROUNDING_MODE_HALF_UP), and it should be 2,50

https://sonarcloud.io/component_measures?id=bartlomiej-gora_RPNLibrary&metric=sqale_index&selected=bartlomiej-gora_RPNLibrary%3Asrc%2Fmain%2Fjava%2Fcom%2Fgithub%2Fbgora%2Frpnlibrary%2FCalculator.java&view=list

Use Library for the trigonometry functions on bidecimal

Try out publishing test reports, so soner can see it

Make Defaultchecker, and DefaultExecutioner reusable.

Add Jacoco plugin to RPN.

Create Max function returning greater value from 2 passed

Add file to configure travif CI