plugins/InspectionGadgets/src/com/siyeh/ig/methodmetrics/ParametersPerMethodInspection.java

   1 /*
   2  * Copyright 2003-2007 Dave Griffith, Bas Leijdekkers
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.siyeh.ig.methodmetrics;
  17
  18 import com.intellij.psi.PsiMethod;
  19 import com.intellij.psi.PsiParameterList;
  20 import com.siyeh.InspectionGadgetsBundle;
  21 import com.siyeh.ig.BaseInspectionVisitor;
  22 import com.siyeh.ig.psiutils.LibraryUtil;
  23 import org.jetbrains.annotations.NotNull;
  24
  25 public class ParametersPerMethodInspection extends MethodMetricInspection {
  26
  27     @NotNull
  28     public String getID() {
  29         return "MethodWithTooManyParameters";
  30     }
  31
  32     @NotNull
  33     public String getDisplayName() {
  34         return InspectionGadgetsBundle.message(
  35                 "parameters.per.method.display.name");
  36     }
  37
  38     @NotNull
  39     public String buildErrorString(Object... infos) {
  40         final Integer parameterCount = (Integer)infos[0];
  41         return InspectionGadgetsBundle.message(
  42                 "parameters.per.method.problem.descriptor", parameterCount);
  43     }
  44
  45     protected int getDefaultLimit() {
  46         return 5;
  47     }
  48
  49     protected String getConfigurationLabel() {
  50         return InspectionGadgetsBundle.message("parameter.limit.option");
  51     }
  52
  53     public BaseInspectionVisitor buildVisitor() {
  54         return new ParametersPerMethodVisitor();
  55     }
  56
  57     private class ParametersPerMethodVisitor extends BaseInspectionVisitor {
  58
  59         @Override public void visitMethod(@NotNull PsiMethod method) {
  60             // note: no call to super
  61             if (method.getNameIdentifier() == null) {
  62                 return;
  63             }
  64             if (method.isConstructor()) {
  65                 return;
  66             }
  67             final PsiParameterList parameterList = method.getParameterList();
  68             final int parametersCount = parameterList.getParametersCount();
  69             if (parametersCount <= getLimit()) {
  70                 return;
  71             }
  72             if (LibraryUtil.isOverrideOfLibraryMethod(method)) {
  73                 return;
  74             }
  75             registerMethodError(method, Integer.valueOf(parametersCount));
  76         }
  77     }
  78 }