org.codenarc.rule.gosu.GosuGetCountUsageRule.groovy Maven / Gradle / Ivy

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A CodeNarc extension library for gosu.

There is a newer version: 1.1.2

/*
* Copyright 2010 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package org.codenarc.rule.gosu

import org.codenarc.source.SourceCode
import org.codenarc.util.gosu.GosuUtil

/**
* Check for incorrect usage of checking for object equality by using Objects themselves instead of PublicID
*/
class GosuGetCountUsageRule extends AbstractGosuRule {
   String name = 'GosuGetCountUsage'
   String description = 'Incorrect usage of getCount() == 0'
   int priority = 3

	@Override
    void gosuApplyTo(SourceCode sourceCode, List violations) {
	   
	   def withinBlockComment = false
	   sourceCode.getLines().eachWithIndex { obj, i ->
		   
		   // Check for block comments and ignore until block finished
		   if (GosuUtil.isStartOfBlockComment(obj)) {
			   withinBlockComment = true
		   }
		   if (GosuUtil.isEndOfBlockComment(obj)) {
			   withinBlockComment = false
		   }

		   if (!withinBlockComment && 
			   !GosuUtil.isBlankLine(obj) && 
			   !GosuUtil.isInlineCommented(obj) &&
			   isIncorrectGetCountUse(obj) ) {
			   		violations << createViolation(i+1, null, "Incorrect usage of getCount() == 0 at line ${i+1}")
			   }    		   
	   }
    }
	   
   /**
    * Find instances of the pattern getCount() == 0
    */
   private boolean isIncorrectGetCountUse(String textLine) {
		return ( textLine.trim() =~ /getCount *\( *\) *== *0/ ) ? true : false
	}	      
}