1 files changed, 125 insertions, 0 deletions
diff --git a/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/fixes/ConvertToVarargsMethodFix.java b/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/fixes/ConvertToVarargsMethodFix.java
new file mode 100644
index 000000000000..2c0212fafc2f
--- /dev/null
+++ b/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/fixes/ConvertToVarargsMethodFix.java
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2000-2013 JetBrains s.r.o.
+ *
+ * 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 com.siyeh.ig.fixes;
+
+import com.intellij.codeInsight.FileModificationService;
+import com.intellij.codeInspection.ProblemDescriptor;
+import com.intellij.openapi.project.Project;
+import com.intellij.psi.*;
+import com.intellij.psi.search.searches.ReferencesSearch;
+import com.intellij.util.IncorrectOperationException;
+import com.intellij.util.Query;
+import com.siyeh.InspectionGadgetsBundle;
+import com.siyeh.ig.InspectionGadgetsFix;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+/**
+ * @author Bas Leijdekkers
+ */
+public class ConvertToVarargsMethodFix extends InspectionGadgetsFix {
+
+  @Override
+  @NotNull
+  public String getFamilyName() {
+    return getName();
+  }
+
+  @NotNull
+  @Override
+  public String getName() {
+    return InspectionGadgetsBundle.message("convert.to.variable.arity.method.quickfix");
+  }
+
+  @Override
+  protected boolean prepareForWriting() {
+    return false;
+  }
+
+  @Override
+  protected void doFix(Project project, ProblemDescriptor descriptor) {
+    final PsiElement element = descriptor.getPsiElement();
+    final PsiElement parent = element.getParent();
+    if (!(parent instanceof PsiMethod)) {
+      return;
+    }
+    final PsiMethod method = (PsiMethod)parent;
+    final Collection<PsiElement> writtenElements = new ArrayList<PsiElement>();
+    final Collection<PsiReferenceExpression> methodCalls = new ArrayList<PsiReferenceExpression>();
+    writtenElements.add(method);
+    for (final PsiReference reference : ReferencesSearch.search(method, method.getUseScope(), false)) {
+      final PsiElement referenceElement = reference.getElement();
+      if (referenceElement instanceof PsiReferenceExpression) {
+        writtenElements.add(referenceElement);
+        methodCalls.add((PsiReferenceExpression)referenceElement);
+      }
+    }
+    if (!FileModificationService.getInstance().preparePsiElementsForWrite(writtenElements)) {
+      return;
+    }
+    makeMethodVarargs(method);
+    makeMethodCallsVarargs(methodCalls);
+  }
+
+  private static void makeMethodVarargs(PsiMethod method) {
+    final PsiParameterList parameterList = method.getParameterList();
+    if (parameterList.getParametersCount() == 0) {
+      return;
+    }
+    final PsiParameter[] parameters = parameterList.getParameters();
+    final PsiParameter lastParameter = parameters[parameters.length - 1];
+    final PsiType type = lastParameter.getType();
+    if (!(type instanceof PsiArrayType)) {
+      return;
+    }
+    final PsiArrayType arrayType = (PsiArrayType)type;
+    final PsiType componentType = arrayType.getComponentType();
+    final PsiElementFactory factory = JavaPsiFacade.getElementFactory(method.getProject());
+    final PsiType ellipsisType = PsiEllipsisType.createEllipsis(componentType, type.getAnnotations());
+    final PsiTypeElement newTypeElement = factory.createTypeElement(ellipsisType);
+    final PsiTypeElement typeElement = lastParameter.getTypeElement();
+    if (typeElement != null) {
+      typeElement.replace(newTypeElement);
+    }
+  }
+
+  private static void makeMethodCallsVarargs(Collection<PsiReferenceExpression> referenceExpressions) {
+    for (final PsiReferenceExpression referenceExpression : referenceExpressions) {
+      final PsiMethodCallExpression methodCallExpression = (PsiMethodCallExpression)referenceExpression.getParent();
+      final PsiExpressionList argumentList = methodCallExpression.getArgumentList();
+      final PsiExpression[] arguments = argumentList.getExpressions();
+      if (arguments.length == 0) {
+        continue;
+      }
+      final PsiExpression lastArgument = arguments[arguments.length - 1];
+      if (!(lastArgument instanceof PsiNewExpression)) {
+        continue;
+      }
+      final PsiNewExpression newExpression = (PsiNewExpression)lastArgument;
+      final PsiArrayInitializerExpression arrayInitializerExpression = newExpression.getArrayInitializer();
+      if (arrayInitializerExpression == null) {
+        continue;
+      }
+      final PsiExpression[] initializers = arrayInitializerExpression.getInitializers();
+      for (final PsiExpression initializer : initializers) {
+        argumentList.add(initializer);
+      }
+      lastArgument.delete();
+    }
+  }
+}