| /* |
| * 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.intellij.psi.util; |
| |
| import com.intellij.openapi.util.Condition; |
| import com.intellij.openapi.extensions.Extensions; |
| import com.intellij.psi.*; |
| import com.intellij.codeInsight.runner.JavaMainMethodProvider; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * @author mike |
| */ |
| public class PsiMethodUtil { |
| private static final JavaMainMethodProvider[] myProviders = Extensions.getExtensions(JavaMainMethodProvider.EP_NAME); |
| |
| public static final Condition<PsiClass> MAIN_CLASS = new Condition<PsiClass>() { |
| @Override |
| public boolean value(final PsiClass psiClass) { |
| if (psiClass instanceof PsiAnonymousClass) return false; |
| if (psiClass.isInterface() && !PsiUtil.isLanguageLevel8OrHigher(psiClass)) return false; |
| return psiClass.getContainingClass() == null || psiClass.hasModifierProperty(PsiModifier.STATIC); |
| } |
| }; |
| |
| private PsiMethodUtil() { } |
| |
| @Nullable |
| public static PsiMethod findMainMethod(final PsiClass aClass) { |
| for (JavaMainMethodProvider provider : myProviders) { |
| if (provider.isApplicable(aClass)) { |
| return provider.findMainInClass(aClass); |
| } |
| } |
| final PsiMethod[] mainMethods = aClass.findMethodsByName("main", true); |
| return findMainMethod(mainMethods); |
| } |
| |
| @Nullable |
| private static PsiMethod findMainMethod(final PsiMethod[] mainMethods) { |
| for (final PsiMethod mainMethod : mainMethods) { |
| if (isMainMethod(mainMethod)) return mainMethod; |
| } |
| return null; |
| } |
| |
| public static boolean isMainMethod(final PsiMethod method) { |
| if (method == null || method.getContainingClass() == null) return false; |
| if (PsiType.VOID != method.getReturnType()) return false; |
| if (!method.hasModifierProperty(PsiModifier.STATIC)) return false; |
| if (!method.hasModifierProperty(PsiModifier.PUBLIC)) return false; |
| final PsiParameter[] parameters = method.getParameterList().getParameters(); |
| if (parameters.length != 1) return false; |
| final PsiType type = parameters[0].getType(); |
| if (!(type instanceof PsiArrayType)) return false; |
| final PsiType componentType = ((PsiArrayType)type).getComponentType(); |
| return componentType.equalsToText(CommonClassNames.JAVA_LANG_STRING); |
| } |
| |
| public static boolean hasMainMethod(final PsiClass psiClass) { |
| for (JavaMainMethodProvider provider : myProviders) { |
| if (provider.isApplicable(psiClass)) { |
| return provider.hasMainMethod(psiClass); |
| } |
| } |
| return findMainMethod(psiClass.findMethodsByName("main", true)) != null; |
| } |
| |
| @Nullable |
| public static PsiMethod findMainInClass(final PsiClass aClass) { |
| if (!MAIN_CLASS.value(aClass)) return null; |
| for (JavaMainMethodProvider provider : myProviders) { |
| if (provider.isApplicable(aClass)) { |
| return provider.findMainInClass(aClass); |
| } |
| } |
| return findMainMethod(aClass); |
| } |
| } |