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reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2026-01-12T09:30:10.907Z","updated_at":"2026-01-12T09:30:11.300Z","avatar_url":"https://github.com/kyriosdata.png","language":"Java","funding_links":[],"categories":[],"sub_categories":[],"readme":"# regras\nBiblioteca para Execução de Regras (BER). \n\n[\u003cimg src=\"https://api.travis-ci.org/kyriosdata/regras.svg?branch=master\"\u003e](https://travis-ci.org/kyriosdata/regras)\n[![Dependency Status](https://www.versioneye.com/user/projects/5818f81589f0a91d55eb921c/badge.svg?style=flat-square)](https://www.versioneye.com/user/projects/5818f81589f0a91d55eb921c)\n[![Sonarqube](https://sonarqube.com/api/badges/gate?key=com.github.kyriosdata.regras:regras)](https://sonarqube.com/dashboard/index?id=com.github.kyriosdata.regras%3Aregras)\n[![Javadocs](http://javadoc.io/badge/com.github.kyriosdata.regras/regras.svg)](http://javadoc.io/doc/com.github.kyriosdata.regras/regras)\n\n\u003cbr /\u003e\n\u003ca rel=\"license\" href=\"http://creativecommons.org/licenses/by/4.0/\"\u003e\n\u003cimg alt=\"Creative Commons License\" style=\"border-width:0\"\n src=\"https://i.creativecommons.org/l/by/4.0/88x31.png\" /\u003e\u003c/a\u003e\n \u003cbr /\u003eThis work is licensed under a \u003ca rel=\"license\" \n href=\"http://creativecommons.org/licenses/by/4.0/\"\u003eCreative Commons \n Attribution 4.0 International License\u003c/a\u003e. \n \u003cbr /\u003eFábio Nogueira de Lucena - Fábrica de Software - \n Instituto de Informática (UFG).\n\n## Como usar (via maven)?\n\nAcrescente a dependencia abaixo no arquivo pom.xml:\n\n\u003cpre\u003e\n\u0026lt;dependency\u0026gt;\n  \u0026lt;groupId\u0026gt;com.github.kyriosdata.regras\u0026lt;/groupId\u0026gt;\n  \u0026lt;artifactId\u0026gt;regras\u0026lt;/artifactId\u0026gt;\n  \u0026lt;version\u0026gt;1.0.0\u0026lt;/version\u0026gt;\n\u0026lt;/dependency\u0026gt;\n\u003c/pre\u003e\n\n## O que é uma regra?\nRegra é o instrumento empregado para produzir um valor para uma\ndada entrada. A entrada é definida por um conjunto de objetos (JSON). O \nresultado é um valor numérico, uma data, um valor lógico ou uma \nsequência de caracteres. A saída também é fornecida como um objeto\nJSON. Em tempo, uma regra também é definida por um objeto \nJSON.\n\nAbaixo segue uma regra do tipo expressão que soma os valores das \nvariáveis \"x\" e \"y\". O resultado é associado à variável identificada \npor \"soma\". A variável deve ser única em um conjunto de regras, \nou seja, não é permitido outra regra que deve ser avaliada juntamente \ncom aquela abaixo e também define como variável o identificador \n\"soma\". Dessa forma, em outra regra, a variável \"soma\" pode fazer\nparte da expressão.\n\n````\n{ \n   \"tipo\"      : \"expressao\", \n   \"variavel\"  : \"soma\", \n   \"expressao\" : \"x + y\" \n}\n````\n   \nUma regra possui alguns atributos predefinidos, \npor exemplo, \"valorMaximo\". Enquanto a regra acima pode resultar no \nvalor 150, por exemplo, para os valores de x e y, 100 e 50, respectivamente,\naquela abaixo teria como resultado o valor 107 para os mesmos valores de\nx e y, pois 107 é o valor máximo indicado para essa regra.\n\n````\n{ \n  \"variavel\"    : \"soma\", \n  \"expressao\"   : \"x + y\",\n  \"valorMaximo\" : 107 \n}\n````\n    \n## O que é uma configuração?\nEm geral estamos interessados na avaliação de várias regras. Configuração\né o meio que permite reunir várias regras. Abaixo segue uma configuração \nformada por duas regras.\n\n````\n{ \n  \"regras\" : \n  [\n    { \n       \"tipo\"        : \"expressao\",\n       \"variavel\"    : \"soma\", \n       \"expressao\"   : \"x + y\",\n       \"valorMaximo\" : 107 \n    },\n    { \n      \"tipo\"      : \"expressao\", \n      \"variavel\"  : \"somaLimitada\", \n      \"expressao\" : \"x + y\" \n    }\n  ]\n}\n````\n\n## Quais são as entradas/saídas?\nAs entradas são definids por objetos JSON. Os atributos desses\nobjetos, quaisquer que sejam eles, são tratados como variáveis\npelas regras. Por exemplo, para o relato (objeto JSON) abaixo\n\n````\n{ \n  \"altura\" : 1.8 \n}\n````\n\nfornecido como entrada para a execução da regra \n\n````\n{ \n  \"tipo\"      : \"expressao\", \n  \"variavel\"  : \"alturaEmCentimetros\", \n  \"expressao\" : \"altura * 100\" \n}\n````\n\no resultado é uma pontuação, nesse caso, o valor resultante é 180, \nque passa a estar disponível por meio do atributo \n\"alturaEmCentimetros\" no objeto JSON retornado\n\n````\n{ \n  \"pontuacoes\" : \n  [ \n    { \n      \"atributo\" : \"alturaEmCentimetros\", \n      \"valor\" : \n      { \n        \"tipo\"  : 0, \n        \"valor\" : 180 \n      }\n    } \n  ] \n}\n````\n\nO JSON acima representa uma contagem, ou seja, o resultado\nda aplicação de regras (configuração) a um conjunto de \nrelatos (relatório).\n\n## Como executar um conjunto de regras?\n\nA execução de várias regras, uma configuração, produz uma\ncoleção de valores, conforme ilustrado pelo método abaixo. \n\n````\nString configuracao = // recupera conjunto de regras (JSON)\nString relatos = // recupera conjunto de objetos (JSON)\nString parametros = // recupera valores iniciais (JSON)\nContagem resultado = Regras.avalia(configuracao, relatos, parametros);\n````\n\nObserve que o resultado é uma instância de `Contagem`. A versão JSON\npode ser obtida com \n\n````\nString resultado = Regras.avaliaAsJson(configuracao, relatos, parametros);\n````\n\nNesse ponto podemos ilustrar uma chamada completa para avaliação de\numa regra. \n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fkyriosdata%2Fregras","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fkyriosdata%2Fregras","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fkyriosdata%2Fregras/lists"}