org.codenarc.rule.convention.NoDoubleRule.groovy Maven / Gradle / Ivy
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The CodeNarc project provides a static analysis tool for Groovy code.
/*
* Copyright 2019 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.convention
import org.codehaus.groovy.ast.ConstructorNode
import org.codehaus.groovy.ast.FieldNode
import org.codehaus.groovy.ast.MethodNode
import org.codehaus.groovy.ast.Parameter
import org.codehaus.groovy.ast.expr.VariableExpression
import org.codenarc.rule.AbstractAstVisitorRule
import org.codenarc.rule.AbstractAstVisitor
/**
* Checks for use of the double or Double types, in fields, variables, method parameters and method return types.
*
* @author Chris Mair
*/
class NoDoubleRule extends AbstractAstVisitorRule {
String name = 'NoDouble'
int priority = 2
Class astVisitorClass = NoDoubleAstVisitor
}
class NoDoubleAstVisitor extends AbstractAstVisitor {
private static final List FLOAT_TYPE_NAMES = ['double', 'Double', 'java.lang.Double']
@Override
void visitField(FieldNode node) {
if (isDoubleTypeName(node.type.name)) {
addViolation(node, "The field ${node.name} in class ${currentClassName} is of type double/Double. Prefer using BigDecimal.")
}
super.visitField(node)
}
@Override
protected void visitMethodComplete(MethodNode node) {
if (isDoubleTypeName(node.returnType.name)) {
addViolation(node, "The method ${node.name} in class ${currentClassName} has a return type of double/Double. Prefer using BigDecimal.")
}
processParameters(node.parameters, node.name)
super.visitMethodComplete(node)
}
@Override
void visitConstructor(ConstructorNode node) {
processParameters(node.parameters, '')
super.visitConstructor(node)
}
@Override
void visitVariableExpression(VariableExpression expression) {
if (isDoubleTypeName(expression.type.name)) {
addViolation(expression, "The variable ${expression.name} in class ${currentClassName} is of type double/Double. Prefer using BigDecimal.")
}
super.visitVariableExpression(expression)
}
private boolean isDoubleTypeName(String typeName) {
return typeName in FLOAT_TYPE_NAMES
}
private void processParameters(Parameter[] parameters, String methodName) {
parameters.each { parameter ->
if (isDoubleTypeName(parameter.type.name)) {
addViolation(parameter, "The parameter named ${parameter.name} in method $methodName of class $currentClassName is of type double/Double. Prefer using BigDecimal.")
}
}
}
}